OVERVIEW

Official designation: Allen-Bradley 1791-16BC (Block I/O, Input and Output Module)

Role/Application: A compact, self-contained module providing 16 DC inputs and 16 DC outputs for versatile control in Remote I/O distributed automation systems.

KEY SPECS SUMMARY

Power: 19.2 to 30 Volts DC

Interfaces / Ports: Remote I/O link

Indicators: Status and I/O point LEDs

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: PLC-2, PLC-3, PLC-5, SLC 5/02

Limit: Max 17.8 Watts dissipation

Lifecycle: Discontinued/Obsolete

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum current rating for a single output channel when vertically mounted at 60 degrees C?

A: The maximum output current rating when vertically mounted is 500 milliamps at 60 degrees C.

Wiring & Installation:

Q: What are the physical dimensions of the 1791-16BC module and the required clearance for installation?

A: Dimensions are 6.95H x 4.35W x 3.85D inches, requiring a 2.0 inch air gap on all four sides.

Troubleshooting & Compatibility:

Q: What is the maximum on-state current draw for a single DC input point at the maximum rated voltage?

A: The maximum on-state input current is 11.0 milliamps at 30 Volts DC.

Replacement & Upgrades:

Q: What is the maximum test voltage for the isolation between I/O groups and the logic circuit on this module?

A: The module provides 500 Volts AC isolation between the power supply, RIO, I/O groups, and logic.