OVERVIEW

Official designation: Allen-Bradley 1791DS-IB8XOB8 (CompactBlock Guard I/O, DeviceNet Safety Module)

Role/Application: A safety-rated distributed I/O module with eight sinking safety inputs and eight sourcing solid-state safety outputs for monitoring and controlling industrial safety devices on a DeviceNet network.

KEY SPECS SUMMARY

Power: 24V DC nominal, 20.4 to 26.4V DC I/O

Interfaces / Ports: DeviceNet, Removable screw terminals

Indicators: Diagnostic and I/O status LEDs

Operating Temp: Minus 40 degrees C to plus 70 degrees C

Platform / Compatibility: Guard I/O, DeviceNet Safety protocol

Limit: IP20 rating, up to SIL 3 compliance

Lifecycle: Discontinued, a replacement may be required

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the additional outputs, besides the eight safety outputs, provided by this module?

A: The module also provides four current sourcing test outputs used for diagnostics and testing safety circuits.

Wiring & Installation:

Q: What is the maximum size and type of wire recommended for use with the module terminals?

A: The module supports solid wire up to 2.5 mm2 (AWG 12) or flexible wire up to 1.5 mm2 (AWG 16).

Troubleshooting & Compatibility:

Q: What are the main communication and power status indicators available on the 1791DS-IB8XOB8?

A: Indicators typically include Module Status, Network Status, Input Power Status, and I/O Power Status error LEDs.

Replacement & Upgrades:

Q: Is this DeviceNet Safety module currently an active product for new installations?

A: The 1791DS-IB8XOB8 is generally discontinued and requires finding an alternative Guard I/O solution.