1794 FLEX I/O
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FLEX I/O Modules
FLEX I/O offers all the functions of larger rack-based I/O without the space requirements. Its cost effectiveness, flexibility, modularity, and reliability have made it the most popular distributed I/O platform with over 4 million modules sold.
FLEX I/O helps eliminate multiple long wiring runs, reduces terminations per point, decreases engineering and installation costs and time, and substantially reduces downtime. It complements all processor platforms from Rockwell Automation for a distributed I/O solution.
Your FLEX I/O system can communicate on EtherNet/IP, ControlNet, DeviceNet, and many other open networks including, but not limited to, Remote I/O, PROFIBUS DP, and Interbus-S. Independently select the I/O, termination style, and network to meet your application needs. Adapters and other components are available for adding to your system as your requirements change.
Conformally coated, extreme environment FLEX I/O products help to reduce panel costs and the need for additional heating/cooling equipment, resulting in lower installation and maintenance costs.
Benefits
- Reduced Space: Wire direct from sensor to terminal base and eliminate terminal strip
- Functionality: 4- through 32-point modules offer functions of larger rack-based I/O
- Increased Productivity: Easy configuration and setup of I/O modules using wizards speeds engineering and installation
- Reduced Downtime: Removal and Insertion Under Power (RIUP) and diagnostics
- Exceptional Choices: Over 90 catalog numbers and a breadth of specialty modules meet the needs of a wide variety of applications
- Operation in Harsh Environments: Conformal coated and extreme environment rated modules.
- Network Flexibility: Communicates on EtherNet/IP, ControlNet, DeviceNet, Remote I/O and other open networks
- Improved Plant Operations: HART analog modules pass through HART data to asset management software or controller for improved plant operations
Product Design
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FLEX I/O modules offer 4 through 32 I/O each. You can plug together a maximum of eight I/O modules into a FLEX I/O assembly, for a maximum of 256 I/O per assembly. The I/O modules are interfaced to the I/O link through an I/O adapter module with a built-in 24V DC input power supply. The I/O modules receive power from the adapter/power-supply through the backplane. Two 120/230V AC-to-24V DC power supplies are also available for powering the adapter/power-supply.
The backplane is formed by modular terminal bases that also provide terminal connection points for I/O wiring. I/O circuitry is packaged in separate I/O modules. Each I/O module plugs into an individual terminal base. The I/O adapter module plugs into the end terminal base. You snap the I/O adapter and the terminal bases onto a DIN rail and plug them together. FLEX I/O assemblies can be mounted horizontally or vertically.
The FLEX I/O family consists of modular components that snap together and mount onto a DIN rail to form the FLEX I/O assembly:
- I/O Adapter. A FLEX I/O adapter module provides an interface for communication between the I/O modules and a scanner port across an I/O link. Each terminal base provides backplane connections between the I/O adapter module and I/O modules.
- I/O Module. FLEX I/O modules plug into a terminal base, and connect to the I/O bus and field devices. Removal and Insertion Under Power (RIUP) makes it possible to replace a failed module without disturbing the field wiring, other I/O modules, or system power.
- Terminal Base. Each 1794 FLEX I/O module requires a terminal base that snaps onto the DIN rail to the right of the I/O adapter. The terminal bases provide terminal connection points for I/O wiring and plug together to form the backplane. Available with screw or spring terminations.
- Accessories. Choose products such as extender cables or the panel mount kit to provide added application flexibility.
- Power Supply. Two 120V-AC-to-24V-DC power supplies are available for powering the adapter/power-supply.
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Extreme Environment Distributed I/O
Rockwell Automation extreme environment FLEX I/O operates over a broad temperature spectrum, -20 ºC to 70 ºC. It is ANSI/ISA2, IEC and EMC- compliant, making it ideal for caustic or extreme environment applications.
Communication
A FLEX I/O adapter module interfaces FLEX I/O modules to an I/O scanner port across a communication network. The FLEX I/O adapter module contains a built-in power supply that converts 24V DC to 5V DC for the backplane to power the FLEX I/O modules. FLEX I/O adapter modules are available for EtherNet/IP, ControlNet (single media or redundant), DeviceNet, Universal Remote I/O, PROFIBUS DP, and other networks (through our Encompass Referenced Products program).
Typical Configurations
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ControlNet Communication
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DeviceNet Communication
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Universal Remote I/O Communication
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Specifications
General Specifications
| Enclosure Type Rating | None (open-style) |
| Mounting Type | DIN-rail, Panel |
| Operating Temperature | 0…55 °C (32…131 °F) -20…70 °C (-4…158 °F)‡ |
| Nonoperating Temperature | -40…85 °C (-40…185 °F) |
| Relative Humidity | 5…95% noncondensing |
| Operating Shock⋆ | 30 g |
| Nonoperating Shock⋆ | 50 g |
| Vibration⋆ | 5 g at 10…500 Hz |
| ⋆ To maintain these specifications, you must use DIN rail locks. ‡ XT (extreme environment) models. |
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Certifications⋆
| UL Listed Industrial Control Equipment |
| UL Listed for Class I, Division 2 Groups A, B, C, D Hazardous Locations |
| CE Marked for all applicable directives |
| CE / ATEX |
| CSA Certified Process Control Equipment for Class I, Division 2 Group A, B, C, D Hazardous Locations |
| C-Tick Marked for all applicable acts |
| Marine Certification |
| SIL 2 Certification |
| ODVA |
| ControlNet |
| ⋆ When product is marked. See the Product Certification link at www.ab.com for declarations of Conformity, Certificates, and other certification details. |
Dimensions and Weights
| Cat. No. | Dimensions (HxWxD), Approx. | Weight |
| I/O Modules | 46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in) | 0.1 kg (0.3 lb) |
| I/O Adapters§ | 87 x 68 x 69 mm (3.4 x 2.7 x 2.7 in) | 0.2 kg (0.4 lb)⋆ |
| Terminal Bases | 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in)‡ | 0.2 kg (0.5 lb) |
| Extender Cables | ||
| 1794-CE1 | 0.3 m (1 ft) | 0.2 kg (0.5 lb) |
| 1794-CE3 | 0.9 m (3 ft) | 0.2 kg (0.5 lb) |
| Power Supplies | ||
| 1794-PS13 | 87 x 68 x 69 mm (3.4 x 2.7 x 2.7 in) | 0.2 kg (0.5 lb) |
| 1794-PS3 | 87 x 94 x 69 mm (3.4 x 3.7 x 2.7 in) | 0.4 kg (0.8 lb) |
| ⋆ 1794-FLA: 0.3 kg (0.6 lb). ‡ With module installed in base. § 1794-AENT, 1794-ACN15, and 1794-ACNR15 adapters have the following dimensions: 87 x 94 x 69 mm (3.4 x 3.7 x 2.7 in). |
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Conformal Coated Products
FLEX I/O conformal coated products meet or exceed the following standards:
| ANSI / ISA-S71.04-1985, Class G1, G2, and G3 environments |
| CEI IEC 6065A-4 Class 1 and 2 environments |
| UL 746E |
I/O Communication Adapters
A FLEX I/O adapter module interfaces FLEX I/O modules to an I/O scanner port across a communication network. The FLEX I/O adapter module contains a built-in power supply that converts 24V DC to 5V DC for the backplane to power the FLEX I/O modules. One adapter communicates with up to eight I/O modules, allowing connection to 256 digital input/output points, or 64 analog input points/32 analog output points, or a mix to meet your needs. Conformal coated versions of standard modules have the letter K in the last position of the catalog number, before the series designation. Extreme environment versions have the letters XT in this position.
| 1794-AENT | 1794-ACN15, 1794-ACNR15♠ , 1794-ACN15K, 1794-ACNR15XT∆ |
1794-ADN, 1794-ADNK♠ |
1794-ASB, 1794-ASBK♠ , 1794-ASBLT♣ |
1794-ASB2, 1794-ASB2K♠ |
1794-APB | 1794-APBDPV1 | 1794-FLA§ | |
| Network | EtherNet/IP | ControlNet | DeviceNet | Universal Remote I/OUniversal Remote I/O | Universal Remote I/O | PROFIBUS DP | PROFIBUS DP | Local I/O to a FlexLogix controller |
| I/O Module Capacity | 8 | 8 | 8 | 8 | 2 | 8 | 8 | 8 |
| Communication Rate | 10/100 Mbps | 5 Mbps | 125 Kbps 250 Kbps 500 Kbps |
57.6 Kbps 115.2 Kbps 230.4 Kbps |
All rates up to 12.0 Mbps | — | ||
| Thermal Dissipation, Max. | 24.9 BTU/hr at 24.0V DC | 15.7 BTU/hr at 19.2V DC | 26 BTU/hr at 19.2V DC | 1.7 BTU/hr at 31.2V DC | 26 BTU/hr at 19.2V DC | 25.6 BTU/hr at 19.2V DC | ||
| Power Dissipation, Max. | 7.3 W at 19.2V DC | 6.6 W at 19.2V DC | 7.6 W at 19.2V DC | 4.6 W | 7.68 W at 19.2V DC | 4.2 W at 19.2V DC | — | |
| Power Supply 24V Current Load (mA) | 440 mA | 400 mA | 300 mA | 330 mA | 330 mA | 330 mA | 309 mA | — |
| Power Supply Input Voltage, Nom. | 24V DC | |||||||
| Operating Voltage Range | 19.2…31.2V DC (includes 5% AC ripple) | |||||||
| ♠ Catalog numbers ending with (K) = Conformal Coated. ∆ Catalog numbers ending with XT = Extreme environment version. ‡ The 1794-ACNR15 and 1794-ACNR15XT adapters accept redundant ControlNet cable media. The 1794-ACN15 and 1794-ACN15K are non-redundant. § The 1794-FLA is an extended local adapter for a FlexLogix controller. ♣ Use the 1794-ASBLT Series D adapter when communicating with Classic PLC-5/15 or PLC-5/25 via Remote I/O. The 1794-ASBLT Series D adapter is a replacement for the 1794-ASB Series D adapter only when communicating with PLC-5/15 or PLC-5/25. |
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DeviceNet Straight 5-pin Open Plug to 5-pin Micro Male Connector
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The DeviceNet straight 5-pin open plug to 5-pin micro male connector can be used in place of the 5-position open style plugs for DeviceNet, making it easier to connect I/O modules to the network, as well as reducing potential for miswiring and saving wiring time.
The DeviceNet straight 5-pin open plug to 5-pin micro male connector is compatible with:
- 1734D POINTBlock I/O
- 1790 CompactBlock LDX I/O
- 1791D CompactBlock I/O
- 1794-ADN FLEX I/O DeviceNet adapter
- 1799 Embedded I/O
| Cat. No. | Description |
| 1799-DNC5MMS | Female Open-style DeviceNet Y Adapter (Qty. 5) |
| 1799-DNC100MMS | DeviceNet straight 5-pin open plug to 5-pin micro male connector (Qty. 100) |
Digital I/O Modules
The FLEX I/O module plugs into the terminal base, connecting to the I/O bus and field devices. Since there is no direct wiring to the I/O module, you can remove and insert modules under power, enabling you to change modules without disturbing field wiring, other I/O modules, or system power. This eliminates costly downtime and the inefficiencies of restarting a system.
Features
- Modules are available in densities ranging from 8 to 32 points.
- Digital I/O modules cover a wide electrical range:
- 120V AC: input, output and isolated input, output modules; 8 and 16 point
- 220V AC: input and output modules; 8 and 16 point
- 5V DC: TTL input and output modules, 16 point
- 24V DC: input, output, and combination modules; sink or source; protected; electronically fused; diagnostic; 8, 16, and 32 point
- 48V DC: sink input, source output modules; 16 point
- 125V DC: sink input module; 16 point
- Relay: sink/source, 8 point
- 120V AC: input, output and isolated input, output modules; 8 and 16 point
- Isolated inputs and outputs can be used in applications such as motor control centers, where individual control transformers are used.
- Protected (P) outputs have electronic protection, which acts to shut the module down in reaction to a short circuit, overload, or over-temperature condition. Recovery from shutdown is automatic upon removal of the output fault. No fault status is provided to the processor.
- Electronic fused (EP) module acts to open the output when a fault occurs. The "fuse" can be reset by operating a pushbutton, via software, or by cycling the input power. Fault status is provided to the processor.
- Diagnostic (D) modules detect, indicate, and report the following faults:
- open input or output field devices or wiring
- shorted output field devices
- shorted input or output wiring
- reverse polarity of user supply wiring
- open input or output field devices or wiring
- Selectable input filter times from <1…60 ms.
- LED for each channel indicating status of:
- corresponding input device
- output signal
- corresponding input device
- Conformal coated (K) versions of standard modules.
- Extreme environment (XT) versions of standard modules.
FLEX Digital AC Input Modules
| Cat. No.♠ | Number of Inputs | Voltage, On-State Input, Nom. | Voltage, On-State Input, Min. | Voltage, Off-State Input, Max. | Current, Off-State Input, Max. | Default Input Filter Time | Power Dissipation, Max. | Terminal Base Unit |
| 1794-IA8 1794-IA8 |
8 | 120V AC | 65V AC | 43V AC | 2.9 mA | Off to On: 8.4 ms On to Off: 26.4 ms |
4.5 W at 132V AC | 1794-TBN, 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD |
| 1794-IA8I | 8 Isolated | |||||||
| 1794-IA16 | 16 | 120V AC | 74V AC | 20V AC | 2.9 mA | Off to On: 7.5 ms On to Off: 26.5 ms |
6.4 W at 132V AC | 1794-TB3, 1794-TB3S, 1794-TBN⋆ |
| 1794-IM8 | 8 | 220V AC | 159V AC | 40V AC | 2.6 mA | 4.7 W at 264V AC | 1794-TBN | |
| 1794-IM16 | 16 | 240V AC | 159V AC | 40V AC | 2.6 mA | 6 W at 264V AC | 1794-TBN | |
| ♠ Catalog numbers ending with (K) = Conformal Coated. ⋆ Auxiliary terminal strips are required when using the 1794-TBN for the 1794-IA16. § Off to On filter is selectable for 8.4, 8.6, 9, 10, 12, 16, 24, or 40 ms. ♣ On to Off filter is selectable for 26.4, 26.6, 27, 28, 30, 34, 42, or 58 ms. ∆ Off to On filter is selectable for 7.5, 8, 9, 10, 12, 16, 24.5, or 42 ms. ♦ On to Off filter is selectable for 26.5, 27, 28, 29, 31, 35, 44, or 60.5 ms. |
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FLEX Digital AC Output Modules
| Cat. No.♠ | Number of Outputs | Voltage, On-State Output, Nom.♣ | Voltage Range, On-State Output♣ | Current per Output, Max. | Current per Module, Max. | Power Dissipation, Max. | Terminal Base Unit |
| 1794-OA8 1794-OA8K |
8 | 120V AC | 85V AC…132V AC | 500 mA at 55 °C∆ (5 mA min) |
4.0 A (8 outputs at 500 mA) | 4.1 W at 0.5 A 6.3 W at 0.75 A 6.3 W at 1.0 A |
1794-TBNF, 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBKD |
| 1794-OA16 | 16 | 120V AC | 85V AC…132V AC | 500 mA at 55 °C (5 mA min) |
4.0 A (16 outputs at 250 mA) | 4.7 W at 0.5 A | 1794-TB3, 1794-TB2, 1794-TB3S, 1794-TBN, 1794-TBKD⋆ |
| 1794-OM8 | 8 | 220V AC | 159V AC…264V AC | 500 mA at 55 °C500 mA @ 55°C (5 mA min) |
4.0 A (8 outputs at 500 mA) | 5 W at 0.5 A | 1794-TBNF, 1794-TBN |
| 1794-OM16 | 16 | 240V AC | 159V AC…264V AC | 500 mA at 55 °C♦ (50 mA min) |
4.0 A | 6 W at 264V AC | 1794-TBNF, 1794-TBN |
| ♠ Catalog numbers ending with (K) = Conformal Coated. ♣ The external AC supply voltage must be capable of a 50 A surge for 1/2 cycle at power-up. ∆ 750 mA per output @ 35 °C. 1.0 A on 4 nonadjacent outputs and 500 mA on the remaining 4 outputs @ 30 °C. ♦ If using 500 mA outputs, alternate wiring so that no two 500 mA outputs are next to each other.⋆ Auxiliary terminal strips are required when using the 1794-TBN for the 1794-OA16. |
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FLEX Digital DC Input Modules
| Cat. No.♠ | Number of Inputs | Voltage, On-State Input, Nom. | Voltage Range, On-State Input | Current, Off-State Input | Power Dissipation, Max. | Terminal Base Unit |
| 1794-IG16 | 16 TTL | 0V | -0.2V DC…0.8V DC | 4.1 mA at 5V DC (3.7 mA nom) max | 1.4 W at 5.5V DC | 1794-TB3, 1794-TB3S |
| 1794-IB8 | 8 current sinking | 24V DC | 10V DC…31.2V DC | 1.5 mA min | 3.5 W at 31.2V DC | 1794-TB3, 1794-TB3S |
| 1794-IB16 | 16 current sinking | 24V DC | 10V DC…31.2V DC | 1.5 mA min | 6.1 W at 31.2V DC | 1794-TB3, 1794-TB3S |
| 1794-IB16XT | 2 W at 31.2V DC | 1794-TB3, -TB3S, TB3SK | ||||
| 1794-IB16D | 10V DC…31.2V DC | 8.5 W at 31.2V DC | 1794-TB32, 1794-TB32S | |||
| 1794-IV16 | 16 current sourcing | 24V DC | 10V DC…31.2V DC | 1.5 mA min | 5.7 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBK |
| 1794-IB32 | 32 current sinking (2 groups of 16) | 24V DC | 19.2V DC…31.2V DC | 1.5 mA min | 6.0 W at 31.2V DC | 1794-TB32, 1794-TB32S |
| 1794-IV32 | 32 current sourcing (2 groups of 16) | 24V DC | 19.2V DC…31.2V DC | 1.5 mA min | 6.0 W at 31.2V DC | 1794-TB32, 1794-TB32S |
| 1794-IC16 | 16 current sinking | 48V DC | 30V DC…60V DC | 1.5 mA min | 6.4 W at 60V DC | 1794-TB3, 1794-TB3S |
| 1794-IH16 | 16 current sinking | 125V DC | 90V DC…146V DC | 0.8 mA min | 6 W at 146V DC | 1794-TB3, 1794-TB3S |
| ♠ Catalog numbers ending in: (K) = Conformal Coated, (D) = includes diagnostics, (XT) = extreme environment. |
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FLEX Digital DC Output Modules
| Cat. No.♠ | Number of Outputs | Voltage, On-State Output, Nom. | Voltage Range, On-State Output | Current, On-State Output, Max. | Output Delay Time, Max. | Power Dissipation, Max. | Terminal Base Unit |
| 1794-OG16 | 16 TTL | 0 | 0V DC…0.4V DC | 24.0 mA per channel | Off to On: 0.25 ms On to Off: 0.5 ms |
0.8 W at 5.5V DC | 1794-TB3, 1794-TB3S |
| 1794-OB8 | 8 current sourcing | 24V DC | 10V DC…31.2V DC | 500 mA per channel, 4.0 A per module | Off to On: 0.5 ms On to Off: 1.0 ms |
3.3 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD |
| 1794-OB8EP 1794-OB8EPK |
8 current sourcing | 24V DC | 19.2V DC…31.2V DC | 2.0 A per channel, 10.0 A per module | Off to On: 0.1 ms On to Off: 0.1 ms |
5.5 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBKD |
| 1794-OB8EPXT | 2.0 A per channel | Off to On: 0.5 ms On to Off: 1.0 ms |
5 W at 31.2V DC | 1794-TB2, -TB3, -TB3S, -TBN | |||
| 1794-OB16 | 16 current sourcing | 24V DC | 10V DC…31.2V DC | 500 mA per channel, 8.0 A per module | Off to On: 0.5 ms On to Off: 1.0 ms |
5.3 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD |
| 1794-OB16D | Off to On: 0.1 ms On to Off: 0.1 msOff to On: 0.1 ms On to Off: 0.1 ms |
4.8 W at 31.2V DC | 1794-TB3, 1794-TB3S, 1794-TBKD | ||||
| 1794-OB16P 1794-OB16PK |
16 current sourcing | 24V DC | 10V DC…31.2V DC | 500 mA per channel, 8.0 A per module | Off to On: 0.5 ms On to Off: 1.0 ms |
5.0 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD |
| 1794-OB16PXT | 1794-TB2, -TB3, -TB3S | ||||||
| 1794-OB32P | 32 current sourcing (2 groups of 16) | 24V DC | 10V DC…31.2V DC | 500 mA per channel; 14.0 A per module⋆ |
Off to On: 0.5 ms On to Off: 1.0 ms |
5.3 W at 31.2V DC | 1794-TB32, 1794-TB32S |
| 1794-OV16 | 16 current sinking | 24V DC | 10V DC…31.2V DC | 500 mA per channel, 8 A per module | Off to On: 0.5 ms On to Off: 1.0 ms |
4.2W at 31.2V DC | 1794-TB3, 1794-TB3S |
| 1794-OV16P | |||||||
| 1794-OV32 | 32 current sinking (2 groups of 16) | 24V DC | 10V DC…31.2V DC | 500 mA | Off to On: 0.5 ms On to Off: 1.0 ms |
4.4 W at 31.2V DC | 1794-TB32, 1794-TB32S |
| 1794-OC16 | 16 current sourcing | 48V DC | 30V DC…60V DC @ 45 °C 55V DC @ 55 °C |
500 mA per channel, 8 A per module | Off to On: 0.5 ms On to Off: 1.0 ms @ 25 °C; 2.0 ms @ 55 °C |
3.7 W at 60V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD |
| ♠ Catalog Numbers ending with: (K) = Conformal Coated, (P) = Protected Outputs, (EP) = Electronic Fused, (D) = Diagnostic, (XT) = extreme environment. ⋆ 6.0 A total for channels 0…15; 8.0 A total for channels 16…31. |
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24V DC External Power - FLEX Digital DC Output Modules
| Cat. No. | External DC Supply Voltage Range | External DC Supply Current Range |
| 1794-OB8 | 10…31.2V DC (5% AC ripple) | 10…35 mA |
| 1794-OB8EP 1794-OB8EPK |
19.2…31.2V DC (5% AC ripple) | 20…35 mA |
| 1794-OB8EPXT | 19.2…31.2V DC (5% AC ripple) | 55 mA |
| 1794-OB16 | 10…31.2V DC (5% AC ripple) | 20…65 mA |
| 1794-OB16D | 10…31.2V DC (5% AC ripple) | 56…78 mA |
| 1794-OB16P 1794-OB16PK |
10…31.2V DC (5% AC ripple) | 25…75 mA |
| 1794-OB16PXT | 10…31.2V DC | 35 mA |
| 1794-OB32P | 10…31.2V DC (5% AC ripple) | 103…273 mA |
| 1794-OV16 | 10…31.2V DC (5% AC ripple) | 20…65 mA |
| 1794-OV16P | 10…31.2V DC (5% AC ripple) | 20…65 mA |
| 1794-OV32 | 10...31.2V DC (5% AC ripple) | 50 mA |
| 1794-OC16 | 30…60V DC (5% AC ripple) | 13…27 mA |
FLEX Digital DC Combination Input/Output Modules
| Cat. No.♠ | Voltage, On-State, Nom. | Voltage, On-State, Range | Inputs | Outputs | Power Dissipation, Max. | Terminal Base Unit♣ | ||||
| Number of Inputs | Default Input Delay Time‡ | Current, Off-State Input, Max. | Number of Outputs | Output Delay Time♣ | Output Currenty, Max. | |||||
| 1794-IB10XOB6 | 24V DC | 10V DC…31.2V DC | 10 current sinking | Off to On: 0.25 ms§ On to Off: 0.25 ms§ |
1.5 mA | 6 current sourcing | OFF to ON: 0.5 ms ON to OFF: 1.0 ms |
2 A per output 10 A per module |
6.0 W at 31.2V DC | 1794-TB3, 1794-TB3S |
| 1794-IB10XOB6XT | 1794-TB2, 1794-TB3, -TB3S, -TB3SK | |||||||||
| 1794-IB16XOB16P | 16 current sinking | 16 current sourcing | 0.5 A per output 8 A per module |
7.0 W at 31.2V DC | 1794-TB32, TB32S | |||||
| ♠ Catalog numbers ending with (P) = Protected Outputs, (XT) = extreme environment. ‡ Input On to Off delay is the time from the input signal dropping below the valid level to recognition by the module. Input Off to On delay time is the time from a valid input signal to recognition by the module. § 0.25 ms (default), 0.5 ms, 1 ms, 2 ms, 4 ms, 8 ms, 16 ms, 32 ms. Selectable using configuration word 3. (Not selectable when used with the 1794-ASB adapter.) ♣ Output Off to On or On to Off delay is the time from the module issuing an output on or off until the output actually turns on or off. |
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24V DC External Power - FLEX Digital DC Combination Modules
| Cat. No. | External DC Supply Voltage Range | External DC Supply Current Range |
| 1794-IB10XOB6 | 10…31.2V DC (includes 5% AC ripple) | 8 mA at 10V DC 15 mA at 19.2V DC 19 mA at 24V DC 25 mA at 31.2V DC |
| 1794-IB10XOB6XT | ||
| 1794-IB16XOB16P | 10…31.2V DC (includes 5% AC ripple) | 78 mA at 10V DC |
FLEX Digital Contact Output Modules
The 1794-OW8 module provides 8 isolated Form A (normally open) contacts capable of switching up to 2.0 A at up to 230V AC and 125V DC. Load power can be obtained from a variety of sources and can range from +5V DC to 240V AC.
| Cat. No.♠ | Number of Outputs | Relay Contact Rating | Output Delay Time, Max. | Power Dissipation, Max. | External DC Supply Current Range | Terminal Base Unit |
| 1794-OW8 1794-OW8K |
8 Isolated N.O. relay contact | 250V AC, 2 A, 50/60 Hz, Resistive; 120/240V AC, 50/60 Hz, 1800 VA Make, 180 VA Break; 5…30V DC, 2 A, Resistive; R150, 5...30V DC, 28 VA not to exceed 1 A below 28V DC |
Off to On: 10 ms⋆ On to Off: 10 ms‡ |
5.5 W | — | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN and 1794-TBNF |
| 1794-OW8XT | ||||||
| ♠ Catalog Numbers ending with: (K) = Conformal Coated, (XT) = extreme environment. ⋆ Time from valid output on signal to relay energization by module. ‡ Time from valid output off signal to relay deenergization by module. |
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Analog, Thermocouple, and RTD I/O Modules
- Individually configurable channels allow the module to be used with a variety of sensors.
- Selectable input filters on many modules allow you to select from several different filter frequencies for each channel that best meets the performance needs of your application. Lower filter settings provide greater noise rejection and resolution. Higher filter settings provide faster performance. Note: Isolated analog modules have four filter selections; the thermocouple module has ten; and the combined RTD/thermocouple module has eight.
- Single-ended or differential inputs depending on module. Analog modules have single-ended inputs while isolated analog and temperature modules have differential inputs. Single-ended voltage sensors reduce costs. Differential inputs are typically more noise immune.
- On-board scaling is performed by the temperature modules and is user-configurable for either °C, °F, or mV. This eliminates the need to scale the data in the user program.
- Internal calibration is performed in the analog modules (1794-IE8, 1794-OE4, and 1794-IE4XOE2). User calibration is required for isolated analog and temperature modules. All modules come factory calibrated.
- Conformal coated (K) versions of standard modules.
- Extreme environment (XT) versions of standard modules.
- HART (Highway Addressable Remote Transmitter) analog modules (1794-IE8H and 1794-OE8H) combine analog and HART connectivity in one module. No external hardware is required to access the HART signal. These modules support FDT-compatible asset management software to HART field devices. Also, HART commands can be transmitted as unscheduled messages.
FLEX Analog Input Modules
- Each channel of the three 1794-IE8 modules and three 1794-IF4I modules is individually configurable for the desired input range. The 1794-IE12 channels are configurable in pairs.
- Use with 2-, 3-, and 4-wire input sensor field devices.
- Input data format:
- 1794-IE8, - IE8K, -IE8XT:
16-bit 2’s complement, left-justified
- 1794-IE12:16-bit 2's complement
- 1794-IF4I, -IF4IXT, -IF4ICFXT:
2’s complement
2’s complement percent
binary
offset binary
- 1794-IE8, - IE8K, -IE8XT:
| Cat. No.♠ | Number of Inputs | Signal Range | Input Conversion Rate | Input Resolution | Absolute Accuracy | Step Response to 63% of FS | External DC Supply Current, Nom. | Power Dissipation, Max. | Terminal Base Unit |
| 1794-IE8 1794-IE8K∆ |
8 single-ended inputs | 4…20 mA 0…20 mA ±10V 0…10V |
256 ms all channels | 12 bits - Unipolar, 11 bits + sign - Bipolar 5.13 mA/Cnt 2.56 mV/Cnt - Unipolar 5.13 mV/Cnt - Bipolar |
Current Input: 0.20% Full Scale at 25 °C Voltage Input: 0.20% Full Scale at 25 °C⋆ |
Current Input: 18.2 ms Voltage Input: 9.4 ms |
60 mA at 24V DC | 3.0 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS |
| 1794-IE8XT | 1794-TB2, -TB3, -TB3S, -TB3T, -TB3TS | ||||||||
| 1794-IF4I | 4 Isolated inputs | 4…20 mA 0…20 mA ±20 mA ±10V 0…10V ±5V 0…5V |
2.5/5.0/7.5 ms all channels | 16 bits - Unipolar, 15 bits + sign - Bipolar 0.320 mA/Cnt - Unipolar 0.640 mA/Cnt - Bipolar 0.156 mV/Cnt - Unipolar 0.313 mV/Cnt - Bipolar |
Current Input: 0.1% Full Scale at 25 °C Voltage Input: 0.1% Full Scale at 25 °C⋆ |
Current or Voltage Input: 1200 Hz conversion rate = 0.6 ms 600 Hz conversion rate = 6.7 ms 300 Hz conversion rate = 13.4 ms 150 Hz conversion rate = 26.7 ms |
80 mA at 24V DC | 2.0 W at 31.2V DC | 1794-TB2, 1794-TB 3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, 1794-TBN |
| 1794-IF4IXT | |||||||||
| 1794-IF4ICFXT | |||||||||
| 1794-IE12 | 12 single-ended Non-isolated inputs | 4…20 mA (user configurable) 0…20 mA (user configurable) |
8.0 ms all channels | 320 mV/cnt 0.641 mA/cnt |
Current Input: 0.1% Full Scale at 25 °C Voltage Input: 0.1% Full Scale at 25 °C⋆ |
Current or Voltage Input: 1.3 s (0.09 s with Quick Step) | 30 mA at 24V DC; 45 mA at 10.0V DC | 1.2 W at 31.2V DC; 1.1 W at 24V DC; 0.9 W at 10.0V DC | 1794-TB3G or 1794-TB3GS |
| ♠ Catalog numbers ending in (K) = Conformal Coated, (XT) = extreme environment. ∆ Each module's channel is individually selectable. ⋆ Includes offset, gain, non-linearity, and repeatability error terms. |
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FLEX Thermocouple and RTD Input Modules
| Cat. No.♠ | Number of Inputs | Input Signal Range | Input Resolution | External DC Supply Current, Nom. | Power Dissipation, Max. | Terminal Base Unit |
| 1794-IR8 | 8 RTD, Strain Gauge | 1…433 W | 16 bits across 435 W | 140 mA at 24V DC | 3 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, 1794-TBKD |
| The 1794-IR8 is a temperature-measuring module that accepts 2-, 3-, and 4-wire RTDs. Use the 1794-IR8 in applications where channel fast-update rate is not required. If you need channel fast-update rates, use the 1794-IRT8 module. | ||||||
| 1794-IRT8 1794-IRT8K 1794-IRT8XT |
8 RTD, Thermocouple, Millivolt, Strain Gauge | -40…100 mV DC for thermocouples 0…325 mV for RTDs |
14 bits | 95 mA at 24V DC | 3.0 W at 31.2V DC | 1794-TB3G, 1794-TB3GS, 1794-TB3GK |
| The 1794-IRT8 and -IRT8K (conformal coated version) are high-speed, high-accuracy temperature/mV measuring module that accepts thermocouple inputs, 2-, 3-, and 4-wire RTD inputs, and mV source inputs. The 1794-IRT8 also offers wire-off, over-range, and under-range detection. Use cold-junction compensators (1794-CJC2) in thermocouple mode. Two cold-junction compensators are shipped with the these modules. The 1794-IRT8XT is the extreme environment version, rated for operation at temperatures of -20…70 °C (-4…158 °F). |
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| 1794-IT8 | 8 Thermocouple, Millivolt | ±76.5 mV | 16 bits (2.384 mV typical) | 150 mA at 24V DC | 3 W at 31.2V DC | 1794-TB3T, 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3TS |
| The 1794-IT8 is a temperature/mV measuring module that accepts inputs from a variety of thermocouples and from the mV source in the range of ±76.5 mV. Use cold-junction compensators (1794-CJC2) in thermocouple mode. Two cold-junction compensators are shipped with the 1794-IT8. | ||||||
| ♠ Catalog numbers ending in (K) = Conformal Coated, (XT) = extreme environment. |
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Thermocouple and RTD Modules—Sensors Supported
| 1794-IR8 | 1794-IRT8K, 1794-IRT8XT | 1794-IT8 |
| RTD | ||
| Resistance: 100 W Pt m = 0.00385 Euro (-200…+870 °C) 100 W Pt m = 0.003916 U.S. (-200…+630 °C) 200 W Pt m = 0.00385 Euro (-200…+630 °C) 500 W Pt m = 0.00385 U.S. (-200…+630 °C) 100 W Nickel m = 0.00618 (-60…+250 °C) 120 W Nickel m = 0.00672 (-60…+250 °C) 200 W Nickel m = 0.00618 (-60…+250 °C) 500 W Nickel m = 0.00618 (-60…+250 °C) 10 W Copper m = 0.00427 (-200…+260 °C) |
Resistance: 100 W Pt m = 0.00385 Euro (-200…+870 °C) 100 W Pt m = 0.003916 U.S. (-200…+630 °C) 200 W Pt m = 0.00385 Euro (-200…+400 °C) 200 W Pt m = 0.003916 U.S. (-200…+400 °C) 100 W Nickel m = 0.00618 (-60…+250 °C) 120 W Nickel m = 0.00672 (-80…+320 °C) 200 W Nickel m = 0.00618 (-60…+200 °C) 10 W Copper m = 0.00427 (-200…+260 °C) |
— |
| Thermocouple | ||
| — | Type B: 300…1800 °C (572…3272 °F) Type E: -270…1000 °C (-454…1832 °F) Type J: -210…1200 °C (-346…2192 °F) Type K: -270…1372 °C (-454…2502 °F) Type TXK/XK (L):-200…800 °C (-328…1472 °F) Type N: -270…1300 °C (-454…2372 °F) Type R: -50…1768 °C (-58…3214 °F) Type S: -50…1768 °C (-58…3214 °F) Type T: -270…400 °C (-454…752 °F) |
Type B: 300…1800 °C (572…3272 °F) Type C: 0…2315 °C (32…4199 °F) Type E: -270…1000 °C (-454…1832 °F) Type J: -210…1200 °C (-346…2192 °F) Type K: -270…1372 °C (-454…2502 °F) Type N: -270…1300 °C (-454…2372 °F) Type R: -50…1768 °C (-58…3214 °F) Type S: -50…1768 °C (-58…3214 °F) Type T: -270…400 °C (-454…752 °F) Type TXK/XK (L): -200…800 °C (-328…1472 °F) |
FLEX Analog Combination I/O Modules
- Input data format:
- 1794-IE4XOE2, -IE4XOE2XT:
16-bit 2's complement, left-justified
- 1794-IE8XOE4:
16-bit, 2's complement
- 1794-IF2XOF2I, -IF2XOF2IXT:
2's complement
2's complement %
binary
offset binary
- 1794-IE4XOE2, -IE4XOE2XT:
- Output data format:
- 1794-IE4XOE2, -IE4XOE2XT:
16-bit 2's complement, left justified
- 1794-IE8XOE4:
16-bit 2's complement
- 1794-IF2XOF2I, -IF2XOF2IXT:
2's complement
2's complement %
binary
offset
- 1794-IE4XOE2, -IE4XOE2XT:
| Cat. No.♠ | Number of Inputs/Outputs | Signal Range | Conversion Rate | Input Resolution | Absolute Accuracy | Step Response to 63% of FS | External DC Supply Current, Nom. | Power Dissipation, Max. | Terminal Base Unit |
| 1794-IE4XOE2 | 4 inputs/2 single-ended outputs | 4…20 mA 0…20 mA ±10V 0…10V |
Inputs: 256 ms all channels Outputs: 1.024 ms all channels |
12 bits - Unipolar, 11 bits + sign - Bipolar 5.13 mA/Cnt 2.56 mV/Cnt - Unipolar 5.13 mV/Cnt - Bipolar |
Current Input: 0.20% Full Scale at 25 °C Voltage Input: 0.20% Full Scale at 25 °C Current Output: 0.425% Full Scale at 25 °C Voltage Output: 0.133% Full Scale at 25 °C⋆ |
Current Input: 18.2 ms Voltage Input: 9.4 ms |
70 mA @ 24V DC | 4.0 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS |
| 1794-IE4XOE2XT | Inputs: 256 ms all channels | 164 mA @ 10.5V DC | 1794-TB2, -TB3, -TB3S, -TB3T, -TB3TS | ||||||
| 1794-IE8XOE4 | 8 single-ended inputs/4 outputs | 4…20 mA (user configurable) 0…20 mA (user configurable) |
Inputs: 8.0 ms all channels Outputs: DAC |
320 mV/cnt 0.641 mΑ/cnt |
Current Input or Output: 0.1% Full Scale at 25 °C Voltage Input or Output: 0.1% Full Scale at 25 °C⋆ |
Current or Voltage Input: 1.3 s (0.09 s with Quick Step) | 140 mA at 24V DC; 280 mA at 10.0V DC | 3.0 W at 31.2V DC; 2.3 W at 24V DC; 2.0 W at 10.0V DC | 1794-TB3G or 1794-TB3GS |
| 1794-IF2XOF2I | 2 isolated inputs/2 outputs | 4…20 mA 0…20 mA ±20 mA ±10V 0…10V ±5V 0…5V |
Inputs: 2.5/5.0/7.5 ms all channels Outputs: 2.5/5.0 ms |
16 bits - unipolar; 15 bits plus sign - bipolar 0.156 mV/cnt unipolar; 0313 mV/cnt bipolar 0.320 mA/cnt unipolar; 0.640 mA/cnt bipolar |
Current Terminal: 0.1% Full Scale at 25 °C Voltage Terminal: 0.1% Full Scale at 25 °C |
Current or Voltage Terminal: 1200 Hz conversion rate = 0.6 ms 600 Hz conversion rate = 6.7 ms 300 Hz conversion rate = 13.4 ms 150 Hz conversion rate = 26.7 ms |
150 mA at 24V DC | 3.3 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, and 1794-TBN |
| 1794-IF2XOF2IXT | Current Terminal: 0.1% Full Scale at 25 °C Voltage Terminalt: 0.1% Full Scale at 25 °C |
2.0 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, and 1794-TBN | ||||||
| ♠ Catalog numbers ending in: (XT) = extreme environment. ⋆ Includes offset, gain, non-linearity, and repeatability error terms. |
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FLEX Analog Output Modules
- Each channel of the three 1794-OE4 modules and two 1794-OF4I modules is individually configurable for the desired range. The 1794-OE12 channels are configurable in pairs.
- Output data format:
- 1794-OE4, -OE4K, -OE4XT:
16-bit 2’s complement, left-justified
- 1794-OE12:
16-bit 2's complement
- 1794-OF4I, -OF4IXT:
2’s complement
2’s complement percent
binary
offset binary
- 1794-OE4, -OE4K, -OE4XT:
| Cat. No.♠ | Number of Outputs | Signal Range | Output Conversion Rate | Output Resolution | Absolute Accuracy | Step Response to 63% of FS, Output | External DC Supply Current, Nom. | Power Dissipation, Max. | Terminal Base Unit |
| 1794-OE4 1794-OE4K |
4 single-ended outputs | 4…20 mA 0…20 mA ±10V 0…10V |
1.024 ms all channels | 12 bits + sign 5.13 mA/Cnt 2.56 mV/Cnt |
Current Output: 0.425% Full Scale at 25 °C Voltage Output: 0.133% Full Scale at 25 °C |
Voltage Output: 24 ms | 70 mA at 24V DC⋆ | 4.5 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, 1794-TBN |
| 1794-OE4XT | 4 single-ended outputs | 4…20 mA 0…20 mA ±10V 0…10V |
— | 12 bits + sign 0.156 mV/cnt 0.320 mΑ/cnt |
Voltage terminal - 0.133% Full Scale at 25 °C Current terminal - 0.425% Full Scale at 25 °C |
24 ms | 180 mA at 10.5V DC | 4.5 W at 31.2V DC | 1794-TB2, -TB3, -TB3S, -TB3T, -TB3TS, and -TBN |
| 1794-OE12 | 12 single-ended outputs | 4…20 mA 0…20 mA |
— | 320 mV/cnt 0.641 mΑ/cnt |
Current Output: 0.1% Full Scale at 25 °C Voltage Output: 0.1% Full Scale at 25 °C |
~70% 1st convert; 96% 2nd convert; 100% 3rd convert | 320 mA at 24V DC 720 mA at 10.0V DC |
4.0 W at 31.2V DC; 4.3 W at 24V DC; 4.0 W at 10.0V DC | 1794-TB3G or 1794-TB3GS |
| 1794-OF4I | 4 Isolated outputs | 4…20 mA 0…20 mA ±10V 0…10V ±5V 0…5V |
2.5/5.0 ms | 15 bits + sign 0.656 mA/Cnt 0.320 mV/Cnt |
Current Output: 0.1% Full Scale at 25 °C Voltage Output: 0.1% Full Scale at 25 °C |
Current or Voltage Output: < 25 ms | 210 mA at 24V DC | 4.7 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, 1794-TBN |
| 1794-OF4IXT | 2.0 W at 31.2V DC | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, and 1794-TBN | |||||||
| ♠ Catalog numbers ending in (K) = Conformal Coated, (XT) = extreme environment. ⋆ Not including outputs. |
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Specialty I/O Modules
Conformal coated versions of standard modules have the letter K in the last position of the catalog number, before the series designation. Extreme environment versions have the letters XT in the last position of the catalog number.
FLEX Counter I/O Modules
| Cat. No. | Number of Inputs/Outputs | Input Frequency, Max. | External DC Supply Current, Nom. | Power Dissipation, Max. | Terminal Base Unit |
| 1794-IJ2 1794-IJ2K 1794-IJ2XT |
• Inputs: 2 groups of 1 frequency input and 1 gate input • Outputs: 2 outputs |
1…32 kHz w/sine wave; 1…32 kHz w/square wave input | 180 mA at 24V DC | 4.6 W at 31.2V DC | 1794-TB3G, 1794-TB3GS |
| The 24V DC 2 Input Frequency Module performs high-speed frequency algorithms and is capable of reporting frequency, acceleration, and direction. The frequency inputs are capable of accepting frequencies up to 32 kHz. Input devices range from magnetic pickup to flowmeters, to incremental encoders to proximity detectors. The module accepts and returns binary data. Outputs are activated by alarms. Module power is supplied from the external power supply. All power for input devices (24V DC) is supplied by the I/O module. | |||||
| 1794-VHSC∆ | • Inputs: 2 groups of A/A, B/B, and Z/Z pairs with 5V DC or 15…24V DC terminations • Outputs: 2 groups of 2 |
1.0 MHz counter and encoder X1 (no filters) 500 kHz encoder X2 (no filters) 250 kHz encoder X4 (no filters) |
100 mA at 24V DC | 5 W at 31.2V DC | 1794-TB3G, 1794-TB3GS |
| The 24V DC 2 Channel Very High Speed Counter Module has two incremental quadrature encoder interfaces each with three inputs (A, B, and Z). Each input module has ±inputs for connection to pulse transmitters with complementary or non-complementary signals. The counter can count pulses of one or two pulse trains for up/down counting and detection of a selectable number of edges (X1, X2, X4). Each of the two counters has an upper limit of 1MHz, a 24-bit counter register, a preset register, and a latch register. Module power is supplied from an external 24V power supply. The 1794-VHSC has two outputs that can be configured for overlapping, multiple windows, and/or pulse width modulation. Use with 1794-ACN15 or 1794-ACNR15 Series B or later ControlNet adapters or 1794-AENT EtherNet/IP adapter. | |||||
| 1794-ID2 | • Inputs: 2 (2 groups of A, B, Z, G inputs) | 100 kHz | 150 mA at 12V DC 75 mA at 24V DC |
5 W at 26.4V DC | 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBNF⋆ |
| The 24V DC 2 Input Pulse Counter Module performs high-speed scaling, calculation operations for various industrial applications including quantity counting, speed calculation, and flow monitoring. All input devices for the pulse counter module should be able to provide the input signal of 6V amplitude. | |||||
| 1794-IP4 | • Inputs: 4 (2 groups of 2) | 100 kHz | 150 mA at 12V DC 75 mA at 24V DC |
5 W at 26.4V DC | 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBNF⋆ |
| The 12/24V DC 4 Input Pulse Counter Module performs high-speed scaling, calculation operations for various industrial applications. Typical applications include quantity counting, speed calculation, and flow monitoring. All the input devices for the pulse counter module should be able to provide the input signal of 6V amplitude. The 1794-IP4 has a 6V minimum threshold for an input On condition and a maximum 3V threshold for an input Off condition. The region between 3V and 6V is a transitional one and therefore requires input signals to pass cleanly through that region, otherwise module operation cannot be guaranteed. | |||||
| ∆ As of FlexLogix firmware revision 11, you can install the 1794-VHSC module (and any other module that uses extended data transfers) on the local or extended-local DIN rails of a FlexLogix system. Previous revisions of the controller firmware support these modules only as remote ControlNet I/O. ⋆ Auxiliary terminal strips are required when using the 1794-TBN or 1794-TBNF for this catalog number. |
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SCANport Communication Module
The SCANport Communication Module interfaces two SCANport communication ports to the backplane. Each port can interface a SCANport-enabled drive or power product through an I/O adapter module to a ControlNet, DeviceNet, or Universal Remote I/O link. SCANport communication provides data for logic command/feedback, analog reference/feedback, and channel enable/status.
SCANport-enabled products include: 1305 AC Drives, 1336 PLUS AC Drives, 1336 PLUS II AC Drives, 1336 IMPACT AC Drives, 1336 FORCE AC Drives, 1336 SPIDER AC Drives, 1336 REGEN package, 1397 DC Drives, 1557 Medium Voltage AC Drives, 1394 Motion Systems, SMC Dialog Plus, SMP Smart Motor Protector, and 2364 Regenerative DC Bus Supply Unit.
| Cat. No. | Communication Ports | Input Voltage Rating | Power Consumption | Terminal Base |
| 1203-FM1 | 2 SCANport⋆ | 5V supplied from flexbus | 0.8 W | 1203-FB1 |
The 1203-FM1 SCANport module may require up to twice the adapter power supply current of standard FLEX I/O modules. When installing FLEX I/O modules, a maximum of four 1203-FM1 modules can be used with any FLEX I/O adapter.
| Determining the Number of 1203 and Standard Modules in a System | ||
| If you are using this number of standard (1794) modules: | Then, the maximum number of 1203 modules that you can use is: | The number of SCANport connections provided is: |
| 7 or 8 | 0 | 0 |
| 5 or 6 | 1 | 2 |
| 3 or 4 | 2 | 4 |
| 1 or 2 | 3 | 6 |
| 0 | 4 | 8 |
SCANport Terminal Base and Cables
For each port, you also need to select a cable kit.
| Cat. No. | Description | Length |
| 1203-FB1 | Terminal Base | — |
| 1202-C03 | 0.33 Meters (1.1 Feet) | 0.3 m |
| 1202-C10 | 1 Meter (3.3 Feet) | 1 m |
| 1202-C30 | 3 Meter (9.8 Feet) | 3 m |
| 1202-C90 | 9 Meter (29.5 Feet) | 9 m |
HART Smart Instrumentation
HART (Highway Addressable Remote Transmitter) is an open protocol designed to connect analog devices. For HART connectivity, select from products available from Rockwell Automation and our Encompass partners.
Select a HART Interface
| For Your Application | Select | Description |
| 1794 FLEX I/O 1797 FLEX Ex I/O |
FLEX I/O and FLEX Ex modules designed for distributed HART systems. | |
| 1756-IF8H 1756-OF8H |
Rockwell Automation analog I/O modules for use in ControlLogix chassis | |
| MVI56-HART | Prosoft interface | |
HART Interface Modules
FLEX and FLEX Ex HART analog modules are ideal for use in applications that need connection with FDT (Field Device Tool) compatible asset management software, such as the Rockwell Software FieldCare HART Communication bundle or Endress + Hauser Fieldcare. For HART Device Type Management (DTM) programs and drivers, go to http://www.ab.com/io/downloads.html and select HART DTM files.
- FLEX HART analog modules can be used on ControlNet or EtherNet/IP. The FLEX Ethernet adapter requires firmware v3.1, which is flash upgradeable, to support these modules.
- Each HART field device is wired to its own input or output channel:
- 8 single-ended channels
- does not support multi-drop
- 2- or 3-wire devices
- 8 single-ended channels
- For use with FlexLogix, the modules must be used on distributed rail with ControlNet adapter and not on local rail.
- HART commands can be transmitted by unscheduled message:
- sample RLL subroutines available
- currently limited to one instance of RLL subroutine per module, one channel at a time
- sample RLL subroutines available
HART Analog Input Module
| Cat. No. | Number of Inputs | Signal Range | Input Conversion Rate | Input Resolution | Absolute Accuracy | Step Response to 99% | External DC Supply Current, Nom. | Power Dissipation, Max. | Terminal Base Unit |
| 1794-IE8H | 8 single-ended Non-isolated | 4…20 mA | 10 ms (50 Hz) / 8.33 ms (60 Hz) | 16 bits | 0.1% Full Scale at 20 °C (68 °F) | 80 ms (current terminal) | 190 mA at 24V DC | 3.9 W at 31.2V DC | 1794-TB3G or 1794-TB3GS |
| 1794-IF8IH | 8 single-ended Isolated | 4…20 mA (user configurable) 0…20 mA (user configurable) |
— | 16 bits - unipolar; 15 bits + sign - bipolar 0.320 mA/cnt unipolar; 0.640 mA/cnt bipolar |
0.1% Full Scale at 25 °C | 4.17 Hz conversion rate = 480 ms 10.0 Hz conversion rate = 200 ms 16.7 Hz conversion rate = 120 ms 19.6 Hz conversion rate = 101 ms 62 Hz conversion rate = 32 ms 470 Hz conversion rate = 4 ms |
190 mA at 24V DC | 4.8 W at 31.2V DC | 1794-TB3 or 1794-TB3S |
HART Analog Output Module
| Cat. No. | Number of Outputs | Signal Range | Output Conversion Rate | Output Resolution | Absolute Accuracy | Step Response to 99% | External DC Supply Current, Nom. | Power Dissipation, Max. | Terminal Base Unit |
| 1794-OE8H | 8 single-ended Non-isolated | 4…20 mA 0…20 mA |
10 ms for all channels | 13 bits | 0.1% Full Scale at 20 °C (68 °F) | 13 ms to 99% of FS / 115 ms during HART comms | 190 mA at 24V DC | 6.1 W at 31.2V DC | 1794-TB3G or 1794-TB3GS |
| 1794-OF8IH | 8 single-ended Isolated | 4…20 mA (user configurable) 0…20 mA (user configurable) |
10 ms | 16 bits - unipolar 0.305 mA/cnt unipolar |
± 0.1% Full Scale at 25 °C ± 0.35% Full Scale at 0…55 °C |
— | 450 mA at 24V DC | 5.0 W at 31.2V DC | 1794-TB3 or 1794-TB3S |
Terminal Bases and Accessories
|
Conformal coated versions of standard modules have the letter K in the last position of the catalog number, before the series designation.
Terminal Bases
Each FLEX I/O module requires a terminal base unit that snaps onto the DIN rail to the right of the I/O adapter. The terminal bases provide terminal connection points for I/O wiring and plug together to form the backplane. They are available with screw or spring terminations.
| Cat. No.♠ | Termination Type | Connections | Used in Applications |
| 1794-TB2 | Cage-clamp | 16 I/O; 18 common; 2 +V | Up to 132V AC/156V DC |
| 1794-TB3 1794-TB3K |
Cage-clamp | 16 I/O; 18 common; 18 +V | Up to 132V AC/156V DC |
| 1794-TB3S | Spring-clamp | ||
| 1794-TB3SK | |||
| 1794-TB32 | Cage-clamp | 32 I/O; 8 common; 8 +V | Up to 31.2V DC |
| 1794-TB32S | Spring-clamp | ||
| 1794-TB3G 1794-TB3TK |
Cage-clamp | 36 I/O; 2 common; 2 +V; 10 chassis ground | Up to 31.2V DC |
| 1794-TB3GS | Spring-clamp | ||
| 1794-TB3GSK | |||
| 1794-TB3T 1794-TB3TK |
Cage-clamp | 16 I/O; 10 common; 4 +V; 8 chassis ground; 2 sets of CJC to be used with temperature modules | Up to 132V AC/156V DC |
| 1794-TB3TS | Spring-clamp | ||
| 1794-TB3TSK | |||
| 1794-TBN | Screw-clamp | 16 I/O; 2 common; 2 +V | 264V AC/DC |
| 1794-TBNK | |||
| 1794-TBNF | |||
| 1794-TBKD | Cage-clamp with 16 knife disconnects | 16 I/O; 18 common; 2 +V | Up to 132V AC/156V DC |
| ♠ Catalog numbers ending with (K) = Conformal Coated. | |||
D-shell Terminal Bases
| Cat. No. | Termination Type | Description | Current Capacity, Max. |
| 1794-TB37DS | D-shell | 37 Pin D-Shell Termination (digital and analog modules) | 5 A per pin 10 A per module |
| 1794-TB62DS | D-shell | 62-pin D-Shell Termination (32-point I/O modules) | V2 - 8 A V1 - 8 A 5 A per pin 10 A per module |
1794 FLEX Distribution Boards
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The distribution boards mount on the terminal base and provide multiple input/output ports. By using the distribution boards, you can use individual wiring for each of the channels.
| Cat. No. | Description | Connectors |
| 1794-TB37EXD4VM8 | FLEX I/O 37-pin Distribution Board for Analog Voltage Modules | 4 M8 |
| 1794-TB37EXD4CM8 | FLEX I/O 37-pin Distribution Board for Analog Current Modules | 4 M8 |
| 1794-TB62EXD4X15 | FLEX I/O 62-pin Distribution Board for 32-bit Modules | 4 D-15 |
1794 FLEX Extender Cables
Use the optional 1794-CE1 (0.3 m, 1ft) or 1794-CE3 (0.9 m, 3ft) extender cable to arrange your system in two rows or split your system into horizontal and vertical orientation. The cable can be used between any module or adapter.
| Cat. No. | Description |
| 1794-CE1 | FLEX I/O 1 ft Extender Cable (0.3 m) |
| 1794-CE3 | FLEX I/O 3 ft Extender Cable (0.9 m) |
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Accessory Products
| Cat. No. | Description | |
| 1794-NM1 | FLEX I/O Panel Mounting Kit | Use this kit to mount your FLEX I/O system on a panel without a DIN rail. |
| 1794-LBL | FLEX I/O Label Kit | Use this kit to tailor the label on you FLEX I/O terminal base unit. Kit includes a diecut drawing and label sheet with five labels. |
| 1492-EA5 | DIN rail locks | Use DIN rail locks for FLEX I/O modules in a high-vibration installation, particularly when mounting the modules vertically. |
| 1794-N2 | FLEX Dummy Filler Module - Slot Cover | Use this module to fill a vacant slot, if desired. |
| 1794-CJC2 | Cold Junction Compensation Kit (2 Pieces) | Use these as replacements for CJCs supplied with 1794-IT8 and 1794-IRT8. |
Power Supplies
The I/O modules are interfaced to the I/O link through an I/O adapter module with a built-in 24V DC input power supply. The I/O modules receive power from the adapter/power supply through the backplane. The 120V AC to 24V DC power supply (1794-PS13 or 1794-PS3) is also available for powering the adapter/power supply. (When providing power for the 1794-FLA extended-local I/O FlexLogix adapter, treat the adapter as a communication adapter, not as an I/O module.)
| Cat. No. | Power Supply Input Voltage, Nom. | Power Supply Input Power | Apparent Input Power, Max. | Transformer Load, Max. | Output Current, Max. | Output Voltage, Nom. |
| 1794-PS3 | 120V/220V AC | 86 W | 205VA | 250VA | 3.0 A⋆ | 24V DC |
| 1794-PS13 | 120V/220V AC | 36 W | 53VA | 90VA | 1.3 A | 24V DC |
| ⋆ Horizontal mount; 2.8 A all other mounting. | ||||||
Power Requirements and Transformer Sizing
These graphs display backplane power load.
- Use the real power value in watts for determining the amount of heat dissipation you will have inside the enclosure.
- Use the apparent power value in VA for estimating power distribution sizing.
- Use the transformer load value in VA of each power supply plus all other loads on a transformer to determine the required transformer size.
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Encompass Partner Products
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Encompass referenced products for 1794 FLEX I/O Platform
Through Encompass, our third-party product referencing program, you can quickly locate the products that best solve your application challenges. Use the Encompass search tool to sort and filter products from best-in-industry suppliers in your region that can provide connectivity to the Rockwell Automation architecture, or are used in conjunction with our products.