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

Configured for address space reservation and slot continuity in Point I/O backplane structures, the Allen-Bradley 1734-ARM (1734-ARM Address Reserve Module) provides direct physical/electrical execution. The module preserves node address mappings for uninstalled or future expansion I/O units, maintaining backplane bus communication without interrupting adjacent slot operations.

Hardware Specifications

Industrial Control & Backplane Communication Properties

As a passive slot management unit within Allen-Bradley automation architectures, the 1734-ARM maintains backplane topology and data routing stability:

• Backplane Bus Communication Velocity: Maintains continuous high-speed Pointbus signal propagation across empty slot locations, preserving deterministic address scanning across EtherNet/IP networks.
• I/O Density Scaling: Reserves physical slot capacity and network node mapping within an ultra-compact 12 mm width, enabling modular system expansion without altering PLC controller tag structures.
• Firmware Flash Compatibility: Acts as a transparent physical hardware spacer, eliminating firmware flash dependencies while ensuring backplane address retention during system-wide processor updates.

Frequently Asked Questions

Q: What is the backplane current draw of the 1734-ARM module?

A: The module draws 75 mA at 5 VDC from the Pointbus backplane power rail, resulting in a nominal power consumption of 0.375 W.

Q: Does the 1734-ARM require software configuration in the controller project tree?

A: The module must be configured in the system I/O tree to reserve the specific slot address and prevent controller backplane mismatch faults when the target I/O card is absent.

Field Installation Guidelines

Proper mechanical mounting and terminal handling maintain backplane contact integrity and structural stability:

• Mechanical Installation: Snap the 1734-ARM module onto the corresponding 1734 terminal base mounted on a 35 mm DIN rail. Ensure the module locking mechanism fully engages the base to prevent physical displacement under vibration.
• Wiring and Slot Blanking: As an address reservation unit, no field I/O wiring is connected to the terminal block. Leave terminal screws unwired or keep protective terminal covers in place to prevent accidental contact with energized circuits.
• Module Replacement: When replacing the 1734-ARM with an active I/O module, ensure system power is managed according to local site standards, and verify that mechanical keying on the terminal base matches the incoming functional card type.