OVERVIEW

Official designation: Allen-Bradley 1755-IB24XOB16 (GuardPLC 2000 Series, Digital I/O Module)

Role/Application: A high-density digital combination I/O module featuring 24 DC inputs and 16 solid-state DC outputs, specifically designed for use within the GuardPLC 2000 safety controller chassis.

KEY SPECS SUMMARY

Power: 24V DC nominal, 18V to 30V range

Interfaces / Ports: High-density connectors

Indicators: Status and I/O LEDs (40 total)

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: 1755 Chassis (GuardPLC 2000)

Limit: 24 inputs, 16 outputs

Lifecycle: Active or mature, varies by model/revision

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum output current rating for each of the 16 digital output points?

A: Each solid-state output point is rated for a maximum continuous current of 0.5 Amps (500 mA).

Wiring & Installation:

Q: Which terminal block is required for proper wiring and connection to the input and output field devices?

A: The module requires the 1755-TBM40P plug-in terminal block for all field connections.

Troubleshooting & Compatibility:

Q: What is the primary purpose of the off-state voltage specification of 5V DC for the inputs?

A: The low off-state voltage ensures reliable detection of a "low" or "off" signal from external input devices.

Replacement & Upgrades:

Q: Is this module directly interchangeable with I/O modules from the GuardPLC 1600 or 1200 series?

A: No, the 1755 series modules are physically specific to the GuardPLC 2000 chassis (1755-A6).