Allen-Bradley 1738-IB8M23 ArmorPoint DC Input Module

The Allen-Bradley 1738-IB8M23, also cataloged as the 1738-IB8M23 DC Input Module, operates as a dedicated hardware component for 24 VDC discrete signal ingestion and field device monitoring within Allen-Bradley ArmorPoint I/O platforms.

Hardware Specifications

ProFINET / EtherNet/IP Deterministic Networks and I/O Density Scaling

• ProFINET / EtherNet/IP Deterministic Networks: Maps 8 discrete input signal states directly onto the backplane bus, enabling real-time data transfers to primary communication adapters without network latency.
• I/O Density Scaling: Consolidates 8 non-isolated sinking input channels into a single IP 67 sealed housing with M23 connectivity, maximizing point density for direct machine-mount applications.
• Firmware Flash Compatibility: Maintains hardware execution synchronization and diagnostic reporting through 10 integrated LED indicators monitoring individual input states, module status, and network link health.

Frequently Asked Questions

Q: What connector standard is integrated into the 1738-IB8M23 input module? A: The module utilizes multi-pin M23 connectors to interface all 8 discrete input channels to field devices.

Q: What mechanical mounting mechanism is used to secure the 1738-IB8M23 to its base? A: The module features a dedicated latching mechanism that securely locks the electronics housing to the included mounting base using standard hand tools.

Q: What vibration and shock withstand ratings apply to the 1738-IB8M23? A: The hardware withstands up to 5 G vibration at 10 to 500 Hz and an operating shock rating of 40 G.

Field Installation Guidelines

• Mount the provided base plate onto the machine frame and lock the 1738-IB8M23 module onto the base assembly using the integral latching mechanism and standard screwdriver.
• Connect multi-channel sensor cabling via the M23 connector interface. Ensure the threaded connector sleeve is fully tightened to maintain the IP 67 sealed enclosure rating.
• Route field wiring away from heavy inductive loads and high-voltage AC lines to mitigate noise coupling on 24 VDC signal lines.
• Verify nominal field voltage stays within 24 VDC limits before energizing sensor loop circuits.