Catalogs > Automation Systems Catalog > I/O > In-Cabinet Distributed I/O > 1794 FLEX I/O
1794 FLEX I/O
| Introduction |  |
Product Design | |
Typical Configurations | |
Specifications | |
I/O Communication Adapters | |
Digital I/O Modules | |
| Analog, Thermocouple, and RTD I/O Modules | |
Specialty I/O Modules | |
HART Smart Instrumentation | |
Terminal Bases and Accessories | |
Power Supplies | |
Encompass Partner Products | |
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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