1791D/P/R CompactBlock I/O
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CompactBlock I/O
CompactBlock I/O is ideal for applications restricted by space limitations and applications requiring highly distributed I/O blocks close to sensors and actuators. DeviceNet, Universal Remote I/O, and PROFIBUS DP are supported. Up to 32 points can be addressed on a single network node. Local control is accomplished through DeviceLogix™ Smart Component Technology.
Benefits
- Compact size fits into shallow enclosures and confined areas.
- Built-in DeviceNet, Universal Remote I/O, or PROFIBUS DP adapters offer multiple network solutions.
- DeviceLogix™ Smart Component Technology on DeviceNet blocks enable localized, simple control functions for faster sense-to-actuation time.
- Higher environmental specifications compared to 1790 CompactBlock LDX I/O blocks expands application range.
- IEC/NEMA Type 3+ inputs offer the widest range of compatible sensors.
- Removable terminal strips make it easy to replace an I/O block without rewiring.
- Node address switches and autobaud ease network commissioning.
- Cyclic and change-of-state DeviceNet operation improves network throughput by reducing network bandwidth usage.
- Selectable input filters let you select off-to-on and on-to-off delays best suited for your application.
- Output short-circuit protection protects outputs against accidental miswiring.
Product Design
CompactBlock I/O blocks are available as either base blocks or expansion blocks. The base blocks contain a maximum of 16 digital I/O, as well as a built-in DeviceNet, Universal Remote I/O, or PROFIBUS DP network adapter. DeviceNet base blocks include DeviceLogix Smart Component Technology.
A CompactBlock I/O expansion block contains 16 digital I/O or 4 in/2 out of analog points and connects to a base block through a ribbon cable. You can add one expansion block to a CompactBlock I/O base block for up to 32 I/O points per node. Expansion blocks are compatible with all base blocks. An expansion block cannot be used alone.
The DeviceNet network supplies power to DeviceNet base blocks and expansion blocks. A separate external 24V DC power supply is required for Universal Remote I/O and PROFIBUS DP base blocks and expansion blocks. Inputs and outputs are powered by an external 24V DC source that is independent of the network.
Removable terminal strips on CompactBlock I/O make it easy to replace an I/O block without rewiring. The I/O blocks can be mounted on a panel or DIN rail in virtually any orientation.
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| Possible configurations for CompactBlock I/O modules on DeviceNet, PROFIBUS DP, and Universal Remote I/O networks. Each base module supports one expansion module. | The CompactBlock I/O modules contain a removable terminal block that allows for easy module replacement without rewiring. Removable terminal blocks on all modules are easy to maintain and help reduce downtime. |
Communication
A CompactBlock I/O base block has a built-in DeviceNet, Universal Remote I/O, or PROFIBUS DP I/O adapter port that interfaces the I/O with a network link to communicate with a scanner port for a programmable controller processor.
Typical Configuration
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Specifications
General Specifications
| Enclosure Type Rating | Meets IP20 |
| Mounting Type | DIN-rail, Panel |
| Operating Temperature | 0…60 °C (32…140 °F) |
| Non-Operating Temperature | -40…85 °C (-40…185 °F) |
| Relative Humidity | 5…95% noncondensing |
| Operating Shock | 30 g |
| Non-Operating Shock | 50 g |
| Vibration | 5 g at 10…500 Hz |
| Certifications¬ | UL, c-UL-us Class I Div 2 Hazardous, CE, C-Tick, ODVA |
| ¬ 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
| Description | Dimensions (HxWxD), Approx. | Weight |
| Base Blocks | 50 x 150 x 38 mm (1.97 x 5.91 x 1.5 in) | 0.2 kg (0.4 lb) |
| Expansion Blocks | 50 x 115 x 38 mm (1.97 x 4.4 x 1.5 in) | 0.1 kg (0.3 lb) |
Digital I/O Base Blocks
- Built-in DeviceNet (1791D), Universal Remote I/O (1791R), or PROFIBUS DP (1791P) I/O adapter with up to 16 I/O points.
- DeviceLogix Smart Component Technology included in DeviceNet base blocks.
- Each base block supports one digital or analog CompactBlock expansion block (except for 1791D-4B0, which is not expandable).
- Removable screw-clamp terminal strips.
Digital DC Input Base Blocks
| Cat. No. | 1791D-4B0‡ | 1791D-16B0 | 1791R-16B0 | 1791P-16B0 | 1791D-16V0 |
| Termination Type | Screw-clamp | Screw-clamp | Screw-clamp | ||
| Number of Inputs | 4 Sink, Non-isolated (1 group of 4) | 16 Sink, Non-isolated (2 groups of 8) | 16 Source, Non-isolated (2 groups of 8) | ||
| Voltage, On-State Input, Nom. | 24V DC | 24V DC | 24V DC | ||
| Voltage, On-State Input, Range | 10…30V DC¬ | 10…30V DC¬ | 10…30V DC¬ | ||
| Current, Off-State Input, Max. | 1.5 mA | 1.5 mA | 1.5 mA | ||
| Network Adapter | DeviceNet | DeviceNet | Universal Remote I/O | PROFIBUS DP | DeviceNet |
| Network Current Load | 200 mA | 200 mA | 250 mA | 250 mA | 200 mA |
| Power Dissipation, Max. | 3.52 W | 7.48 W | 9.78 W | 9.78 W | 7.48 W |
| ¬ Max voltage @ 40 °C; 25V DC @ 60 °C. ‡ Not expandable. |
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Digital DC Output Base Blocks
Outputs are electronically protected.
| Cat. No. | 1791D-0B8P | 1791D-0B16P | 1791R-0B16P | 1791P-0B16P | 1791D-0V16P |
| Termination Type | Screw-clamp | Screw-clamp | Screw-clamp | ||
| Number of Outputs | 8 Source, Non-isolated (1 group of 8) | 16 Source, Non-isolated (2 groups of 8) | 16 Sink, Non-isolated (2 groups of 8) | ||
| Voltage, On-State Output, Nom. | 24V DC | 24V DC | 24V DC | ||
| Voltage, On-State Output, Range | 10…30V DC | 10…30V DC | 10…30V DC | ||
| Current, On-state Output, Max. | 0.5 A | 0.5 A | 0.5 A | ||
| Network Adapter | DeviceNet | DeviceNet | Universal Remote I/O | PROFIBUS DP | DeviceNet |
| Network Current Load | 200 mA | 200 mA | 250 mA | 250 mA | 200 mA |
Digital DC Combination Base Blocks
Outputs are electronically protected.
| Cat. No. | 1791D-4B4P | 1791R-4B4P | 1791P-4B4P | 1791D-8B8P | 1791R-8B8P | 1791P-8B8P | 1791D-8V8P | 1791R-8V8P | 1791P-8V8P |
| Termination Type | Screw-clamp | Screw-clamp | Screw-clamp | ||||||
| Inputs | |||||||||
| Number of Inputs | 4 Sink, Non-isolated (1 group of 4) | 8 Sink, Non-isolated (1 group of 8) | 8 Source, Non-isolated (1 group of 8) | ||||||
| Voltage, On-State Input, Nom. | 24V DC | 24V DC | 24V DC | ||||||
| Voltage, On-State Input, Range | 10…30V DC¬ | 10…30V DC¬ | 10…30V DC¬ | ||||||
| Current, Off-State Input, Max. | 1.5 mA | 1.5 mA | 1.5 mA | ||||||
| Outputs | |||||||||
| Number of Outputs | 4 Source, Non-isolated (1 group of 4) | 8 Source, Non-isolated (1 group of 8) | 8 Sink, Non-isolated (1 group of 8) | ||||||
| Voltage, On-State Output, Nom. | 24V DC | 24V DC | 24V DC | ||||||
| Voltage, On-State Output, Range | 10…30V DC | 10…30V DC | 10…30V DC | ||||||
| Current, On-State Output, Max. | 0.5 A | 0.5 A | 0.5 A | ||||||
| Network Adapter | DeviceNet | Universal Remote I/O | PROFIBUS DP | DeviceNet | Universal Remote I/O | PROFIBUS DP | DeviceNet | Universal Remote I/O | PROFIBUS DP |
| Network Current Load | 200 mA | 250 mA | 250 mA | 200 mA | 250 mA | 250 mA | 200 mA | 250 mA | 250 mA |
| ¬ Max voltage @ 40 °C; 25V DC @ 60 °C. | |||||||||
Digital I/O Expansion Blocks
- You can add one CompactBlock digital I/O expansion block to any CompactBlock base block (except for 1791D-4B0, which is not expandable) to expand the I/O assembly to up to 32 I/O points. An expansion block cannot be used alone.
- Each block ships with a 4-cm ribbon cable to connect it to the base block. An optional 15-cm ribbon cable is available.
- Removable screw-clamp terminal strips.
Digital DC Input Expansion Blocks
| Cat. No. | 1791D-16B0X | 1791D-16V0X |
| Termination Type | Screw-clamp | Screw-clamp |
| Number of Inputs | 16 Sink, Non-isolated (2 groups of 8) | 16 Source, Non-isolated (2 groups of 8) |
| Voltage, On-State Input, Nom. | 24V DC | |
| Voltage, On-State Input, Range | 10…30V DC¬ | |
| Current, Off-State Input, Max. | 1.5 mA | |
| ¬ Max voltage @ 40 °C; 25V DC @ 60 °C. | ||
Digital DC Output Expansion Blocks
Outputs are electronically protected.
| Cat. No. | 1791D-0B16PX | 1791D-0V16PX |
| Termination Type | Screw-clamp | Screw-clamp |
| Number of Outputs | 16 Source, Non-isolated (2 groups of 8) | 16 Sink, Non-isolated (2 groups of 8) |
| Voltage, On-State Output, Nom. | 24V DC | |
| Voltage, On-State Input, Range | 10…30V DC | |
| Current, On-State Output, Max. | 0.5 A | |
Analog I/O Expansion Blocks
- You can add one CompactBlock analog I/O expansion block to any CompactBlock base block. An expansion block cannot be used alone.
- Each block ships with a 4-cm ribbon cable to connect it to the base block. An optional 15-cm ribbon cable is available.
- Removable screw-clamp terminal strips.
- Data Format: 12-bit integer.
| Cat. No. | 1791D-N4CV2X |
| Termination Type | Screw-clamp |
| Number of Inputs/Outputs | 4 single-ended inputs; 2 single-ended outputs |
| Signal Range (Inputs and Outputs) | 0…24 mA 0…20 mA 0…10V |
| Input Update Rate, per Module | 100 ms per channel @ notch = 60 Hz |
| Input Resolution | 12-bits |
| Overall Accuracy | Current Input: ±0.25% of Full Scale Voltage Input: ±0.25% of Full Scale Current Output: ±0.2% of Full Scale Voltage Output: ±0.2% of Full Scale |
| External Power Required | 100 mA @ 24V DC |
Accessory Products
DeviceNet Communication Cable Assemblies
| Cat. No. | Description | Length (m) | Connector Shell Type |
| 1485K-P1F5-C | Unshielded DeviceNet drop cable assembly with micro-male connector for connection to a flat trunk cable | 1 | aluminum |
| 1485K-P6F5-C | 6 | aluminum | |
| 1485R-P1M5-C | Shielded DeviceNet drop cable assembly with mini-male connector for connection to a round trunk cable | 1 | aluminum |
| 1485RS-P1M5-C | stainless steel | ||
| 1485R-P2M5-C | Shielded DeviceNet drop cable assembly with mini-male connector for connection to a round trunk cable | 2 | aluminum |
| 1485RS-P2M5-C | stainless steel | ||
| 1485R-P3M5-C | Shielded DeviceNet drop cable assembly with mini-male connector for connection to a round trunk cable | 3 | aluminum |
| 1485RS-P3M5-C | stainless steel | ||
| Note: You can also use a cable section with no connectors. | |||
Cables and Connectors
| Cat. No. | Description | Qty per Package |
| 1791D-4CMCBL | 24V DC block I/O replacement ribbon cable, 4 cm | 5 |
| 1791D-15CMCBL | 24V DC block I/O longer ribbon cable, 15 cm | 5 |
| 1791D-30CMCBL | 24V DC block I/O long ribbon cable, 30 cm | 5 |
| 1791D-RTBN21 | Block I/O replacement terminal block, 21-pin NEMA | 1 |
| 1791R-RIOSCON | Universal Remote I/O 6-position connector, lock screws (for daisy-chaining) | 1 |
| 1787-PLUG-10R | Connector for daisy-chaining a DeviceNet drop cable | 1 |
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 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) |