Allen Bradley 1734-ARM POINT I/O Address Reserve Module

Allen Bradley 1734-ARM POINT I/O Address Reserve Module

The Allen Bradley 1734-ARM, also cataloged as the 1734-ARM Address Reserve Module, operates as a dedicated hardware component for node address preservation and slot reservation within POINT I/O backplane structures.

Hardware Specifications

Industrial Control and Backplane Bus Communication Velocity

POINT I/O backplane bus communication velocity relies on unbroken electrical continuity and deterministic slot addressing across the terminal base network. The 1734-ARM module reserves a specific slot position and backplane address within EtherNet/IP or ControlNet scan lists without consuming I/O process data words. Maintaining active firmware flash compatibility and physical backplane pass-through connections ensures smooth I/O density scaling during future online system expansions.

Frequently Asked Questions

Q: Does the 1734-ARM module consume I/O data words in the controller scan list?

A: No. The 1734-ARM acts as a passive slot placeholder and address reservation card without transmitting input or output data bits to the PLC controller.

Q: Can a 1734-ARM module be replaced with an active I/O module while the backplane is powered?

A: Yes. The POINT I/O backplane supports Removal and Insertion Under Power (RIUP), allowing the reserve module to be swapped for a functional I/O module without interrupting network operation.

Field Installation Guidelines

• Lock the 1734 terminal base assembly onto the DIN rail before sliding the 1734-ARM module vertically into the base unit until it clicks into place.
• Set the mechanical keying switch on the terminal base unit to position 1 to prevent incorrect module insertion during future maintenance.
• Ensure backplane power supplies are properly dimensioned to account for the total current draw of both active modules and future expansion cards.
• Maintain a minimum clearance of 30 mm above and below the POINT I/O assembly inside the enclosure to promote natural airflow.
• Connect the DIN rail to cabinet single-point ground via a heavy grounding strap to maintain low-impedance electrical shielding across the backplane.