OVERVIEW

Official designation: Allen-Bradley 1738-IB8M8 (ArmorPoint I/O, Digital Input Module)

Role/Application: A rugged, sealed ArmorPoint module providing eight 24V DC sinking inputs for on-machine, distributed automation in harsh environments, utilizing M8 Pico 3-pin connectors.

KEY SPECS SUMMARY

Power: 10V DC to 28.8V DC

Interfaces / Ports: Eight M8 Pico 3-pin connectors

Indicators: One status LED per input channel

Operating Temp: -20 to 60 degrees C

Platform / Compatibility: ArmorPoint I/O, IP67/IP69K housing

Limit: 75 mA max POINTBus current

Lifecycle: Existing

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the hardware input delay time for the 1738-IB8M8 module?

A: The minimum input delay is 0.5 milliseconds hardware, plus 0 to 65 milliseconds configurable time.

Wiring & Installation:

Q: What is the required key switch position on the mounting base for this input module?

A: The module requires a single key switch position for proper mounting on the base.

Troubleshooting & Compatibility:

Q: What is the maximum off-state voltage allowed on the input channels?

A: The module's maximum off-state input voltage is 5 Volts DC.

Replacement & Upgrades:

Q: Does the module's 75 mA backplane current limit affect its field device power capacity?

A: No, the 75 mA limit is for the POINTBus internal power, not the field power distribution.