1791DS-IB12 Allen-Bradley DeviceNet Safety CompactBlock Input Module

Product parameters

Module Type: DeviceNet Safety CompactBlock I/O Module

Series: Allen-Bradley Guard I/O 1791DS series

Input/output points:

Input: 12 secure inputs (Current Sinking type)

Test output: 4 test outputs (Current Sourcing, used for power supply or diagnosis of sensors)

Working voltage:

I/O power supply voltage: 20.4-26.4V DC (nominal 24V DC)

Communication power supply voltage: 11-25V DC (nominal 24V DC)

Input characteristics:

Input current: 6 mA (nominal)

On-state voltage: Minimum 11V DC

Cut-off status voltage: Up to 5V DC

Turn-off current: Maximum 1 mA

Output characteristics:

Test output rated current: 0.7A

Maximum residual voltage: 1.2V

Maximum leakage current: 0.1 mA

Communication protocol: DeviceNet, supporting CIP-Safety protocol extension

Baud rate: 125K, 250K or 500K

Communication current consumption: 110 mA (at 24V DC)

Power dissipation

Maximum power dissipation: 3.2W

Maximum heat dissipation: 10.8 BTU/ hour

Isolation

I/O to communication: 1000V AC (1 minute)

Input group to input group: No isolation

Environmental conditions:

Operating temperature: 0 to 60°C (32 to 140°F)

Storage temperature: -40 to 85°C (-40 to 185°F)

Relative humidity: 5-95% (non-condensing)

Protection grade: IEC IP20 (needs to be installed in an appropriate protection cabinet)

Installation method: Supports horizontal or vertical installation, using DIN rails (with DIN rail hooks)

When installing, a space of 1.96 inches (approximately 5 cm) should be left above and below the module to ensure ventilation and wiring.

Terminal type: Detachable screw terminal. The recommended cable is 22-14 AWG (0.34-2 mm²)

Security Certification

Comply with the safety integrity level (SIL) of IEC 61508 standard 3

Comply with the EN 954-1 standard for Category 4 (Safety Category 4)

North American Hazardous Location Approval

Function

Secure input processing

It provides 12 safety input channels (current absorption type) for connecting safety sensors, such as emergency stop buttons, safety light curtains, door switches, limit switches, etc.

The input supports single-channel or dual-channel configuration and is applicable to SIL 3 and Category 4 safety applications.

Test output:

It provides 4 test outputs (current source type) to supply power to the sensor or perform diagnostic functions (such as detecting short circuits, open circuits or cross-faults).

The test output can be used to drive indicator lights or small actuators.

DeviceNet communication:

Support the CIP-Safety protocol through the DeviceNet network and communicate with Allen-Bradley's Logix controllers (such as CompactLogix, ControlLogix) or other Devicenet-compatible devices.

Supports automatic device replacement (ADR) and online configuration to simplify system maintenance.

Security Certification

It complies with the SIL 3 standards of IEC 61508 and the Category 4 standards of EN 954-1, and is applicable to control systems that require high safety.

Support redundancy and fault diagnosis to ensure that the system enters a safe state when a fault occurs.

Fault Diagnosis:

It is equipped with status indicator lights to display the operating status of the module, communication status and input/output status, facilitating quick fault detection.

Supports DeviceNet diagnostic function, which can monitor network status and module health conditions.

Compact design

The module integrates safety input, test output and communication interfaces, making it suitable for distributed safety control systems and reducing the complexity of wiring.

Easy to install and maintain

The detachable terminal block design simplifies wiring and module replacement.

DIN rail mounting, suitable for control cabinets with limited space.

Application scenarios

Safety control system

It is used to monitor safety-related equipment, such as emergency stop buttons, safety light curtains, safety door switches or safety relays.

It is commonly seen in scenarios that require SIL 3 or Category 4 safety levels, such as robot workstations, presses, and automated assembly lines.

Industrial Automation

Applied to automated production lines in manufacturing, it monitors the status of sensors and triggers safe shutdowns or alarms.

It is suitable for industries such as automotive manufacturing, food and beverage, and packaging machinery.

Distributed Control System (DCS)

It communicates with the main controller (such as ControlLogix or CompactLogix) via the DeviceNet network and is suitable for distributed secure I/O expansion.

Supports Daisy chain topology, reduces wiring costs, and is suitable for large factories or long-distance control.

Process safety: It is used in the chemical, oil and gas or pharmaceutical industries to monitor key safety signals (such as level switches, pressure switches) to prevent accidents.

It meets the certification requirements for hazardous locations and is suitable for some hazardous environments.

Building automation: It is used in building security systems to monitor the status of security access control or fire protection equipment.

Advantage Products:

All items are Distributor Ready-stock Genuine Brand-new Supplying, please inform us if the other conditions are needed, Used, Open-box, Refurbished, etc.

Many Available just wait for you, feel free to ask to get better deal!!!

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