Allen-Bradley 1734-IA2 POINT I/O 120 VAC Input Module

The Allen-Bradley 1734-IA2, also cataloged as the 1734-IA2 Digital AC Input Module, operates as a dedicated hardware component for 120 VAC discrete signal sensing and field contact monitoring within POINT I/O system architectures.

Hardware Specifications

Backplane Bus Communication Velocity and Density

• Low POINTBus current draw of 75 mA at 5 VDC minimizes backplane power supply overhead across dense I/O base assemblies.
• Two-channel non-isolated input structure allows precise point-level signal density scaling without excessive cabinet space consumption.
• Direct backplane communication ensures deterministic real-time input status delivery to central Logix controllers via network adapters.

Frequently Asked Questions

Q: What is the backplane current requirement for the 1734-IA2 module?

A: The module draws 75 mA maximum from the 5 VDC POINTBus backplane.

Q: What are the off-state and on-state voltage thresholds for the AC input channels?

A: The minimum on-state voltage is 65 VAC, and the maximum off-state voltage limit is 43 VAC.

Field Installation Guidelines

• Insert the module into a compatible terminal base unit mounted on a grounded 35 mm DIN rail.
• Connect field input wiring ensuring AC operating voltage stays strictly within the 85 to 132 VAC range.
• Verify proper isolation barriers between 120 VAC field wiring and low-voltage DC system communication cables.
• Ensure the DIN rail and mounting structure are tied to protective earth ground to support the 240 V continuous isolation rating.