Relay Output Module | Allen-Bradley 1793-OW4S

The 1793-OW4S is a compact 4-point relay output module manufactured by Allen-Bradley for distributed control applications within the FLEX I/O architecture. Powered by a 24 VDC external field supply, this module provides electro-mechanical relay contact outputs capable of switching both AC and DC load devices up to 240 VAC.

Output Ratings and Load Isolation

The module contains 4 individual electromechanical relay outputs designed to switch industrial field loads such as motor starters, solenoids, indicators, and contactors. Operating on isolated switching contacts, it handles continuous load currents up to 2 A per output across a voltage range of 125 VAC to 240 VAC, providing galvonic signal isolation between the control system logic and field wiring.

Power Requirements and System Integration

The 1793-OW4S requires two distinct power sources for operation: a 5 VDC logic supply provided via the Flexbus backplane at 70 mA, and a dedicated 24 VDC external field power supply consuming 125 mA. The unit mounts directly onto compatible FLEX I/O terminal bases, enabling simple DIN-rail installation and convenient field wiring connections.

Frequently Asked Questions

Q: What power inputs are required to operate the 1793-OW4S output module? A: The module requires 5 VDC at 70 mA from the Flexbus backplane for logic operation, plus an external 24 VDC field power supply consuming 125 mA.

Q: What is the maximum load switching capacity per output point? A: Each relay output point can handle a maximum switching voltage of 240 VAC with a continuous output current rating of up to 2 A.