OVERVIEW

Official designation: Allen-Bradley 1791R-16B0 (CompactBlock, 16 Point Input Block)

Role/Application: A base module for the CompactBlock Remote I/O system, providing 16 sinking 24 Volts DC digital inputs for distributed signal acquisition in space-constrained industrial environments.

KEY SPECS SUMMARY

Power: 18 to 30 Volts DC

Interfaces / Ports: Removable termination

Indicators: Refer to the latest manufacturer manual.

Operating Temp: Refer to the latest manufacturer manual.

Platform / Compatibility: PLC, SLC, and SoftLogix systems

Limit: 5 Volts DC maximum Off-state voltage

Lifecycle: Discontinued

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the minimum input On-state current and the maximum input Off-state current for the 1791R-16B0?

A: The minimum On-state current is 2 milliamperes and the maximum Off-state current is 1.5 milliamperes.

Wiring & Installation:

Q: How is the remote I/O rack address set on the 1791R-16B0 base module?

A: The rack address is set using DIP switches on the module, which are read only at power up.

Troubleshooting & Compatibility:

Q: Is this 16 point input block suitable for use with both sinking and sourcing field devices?

A: The module has 16 sinking inputs, making it compatible with field devices that utilize sourcing outputs.

Replacement & Upgrades:

Q: When was the 1791R-16B0 officially discontinued by the manufacturer?

A: The manufacturer officially discontinued this CompactBlock base module on May 31, 2011.