OVERVIEW

Official designation: Allen-Bradley 1791-OB16 (Block I/O, Output Module)

Role/Application: This 24V DC Block I/O module provides 16 discrete sinking output channels with internal protection for reliable signal control in Remote I/O automation systems.

KEY SPECS SUMMARY

Power: 19.2 to 30V DC, 300 mA current draw

Interfaces / Ports: Remote I/O link, non-removable terminal strips

Indicators: Sixteen Output Status LEDs, Communication LED, Status LED

Operating Temp: 0 degrees C to plus 60 degrees C

Platform / Compatibility: PLC-2, PLC-3, PLC-5, and SLC family processors

Limit: Output current rating is 0.5 Ampere per channel

Lifecycle: Discontinued/Obsolete

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the nominal output voltage of the 1791-OB16 and its channel output capacity?

A: The module's nominal output voltage is 24V DC, rated for 0.5 Ampere per channel.

Wiring & Installation:

Q: Is termination required, and if so, under what specific wiring conditions?

A: A termination resistor (150 Ohm) must be installed if the module is the last one on the Remote I/O link.

Troubleshooting & Compatibility:

Q: What is the isolation voltage rating between the logic and I/O groups on this module?

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

Replacement & Upgrades:

Q: When was the Allen-Bradley 1791-OB16 output module officially discontinued by the manufacturer?

A: The 1791-OB16 module was officially discontinued by the manufacturer on June 30, 2015.