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The 1746-OW4 is a 4-point digital relay output module designed for the SLC 500 platform, providing four normally open (Form A) relay contacts. It can be installed in any available slot of a 1746 I/O chassis, except slot 0, and features two points per common to interface with various field devices.
Versatile AC/DC Switching
2.5A High Current Capacity
Dual Isolated Commons
This module supports a broad operating voltage range of 5 to 125V DC and 5 to 265V AC, with a maximum continuous current of 2.5A per point. It provides optical isolation between the backplane and the field-side circuits, and is rated for a maximum of 8.0A per module to ensure reliable switching of both AC and DC loads.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Allen-Bradley 1746-OW4 Relay Output Module Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Power Generation
Controls high-voltage AC/DC auxiliary circuits and generator start sequences. It provides high-current relay contacts with electrical isolation from the backplane.
Oil and Gas
Manages hazardous area actuators and signaling for offshore platforms. The module handles a wide range of switching voltages from 5V to 265V AC.
Water Treatment
Operates large AC motor starters and solenoid valves in municipal facilities. It utilizes isolated common terminals to control independent power circuits.
Automotive Manufacturing
Drives safety interlocks and conveyor motor controllers on assembly lines. The robust design handles high-inrush inductive and resistive loads.
Steel and Mining
Regulates heavy material handling and furnace controllers in smelting plants. It switches high-current AC/DC field devices in harsh electrical environments.
Food and Beverage
Coordinates high-speed packaging lines and automated sorting machinery. It ensures precise operation of dry-contact points for production line actuators.
The 1746-OW4 requires a backplane current draw of 45 mA at 5V DC and 45 mA at 24V DC, and because the module does not contain internal fusing, users must provide external fuses for each output circuit to protect against short circuits and overloads.
During installation or wiring, personnel must wear a grounding wrist strap to prevent electrostatic discharge (ESD) from damaging internal components and must ensure all chassis power is removed before inserting or removing the module to avoid injury or equipment damage. The module provides a maximum contact response time of 10.0 ms for both ON and OFF states and requires surge suppression for inductive loads to protect the relay contacts and extend the life of the module.
What is the output configuration and number of points for the 1746-OW4 module?
The 1746-OW4 is a 4-point relay output module that provides four normally open (form A) contacts, with two points per common.
What are the backplane current requirements for the 1746-OW4 at 5V and 24V DC?
The module has a backplane current draw of 45 mA at 5V DC and 45 mA at 24V DC, which must be considered during chassis power supply loading.
What are the operating voltage ranges for the 1746-OW4 relay contacts?
The module supports operating voltage ranges of 5 to 125V DC and 5 to 265V AC, allowing for versatile control of various AC and DC loads.
Is the 1746-OW4 module equipped with internal circuit protection?
No, the 1746-OW4 does not contain internal fusing; therefore, you must provide external fuses to protect the module from short circuits and overloads.
What is the maximum continuous current per point for the 1746-OW4 module?
The maximum continuous current per point is 2.5A for both AC and DC voltages, with a maximum of 8.0A per module at 30°C.
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Our extensive inventory of control systems (DCS, PLC, CNC), panel controllers, human-machine interfaces (HMI), industrial PCs, drivers, and power spare parts helps you reduce maintenance costs. Provide industrial automation spare parts that manufacturers no longer provide. We are a leading supplier that provides rare industrial automation parts to businesses of all sizes, with a strong track record of delivering the highest quality parts and services to customers at highly competitive price.
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