
SLC 500 4-Channel Relay Output Module
The Allen-Bradley 1746-OW4 is a relay contact output module. It has 4 relay contact outputs and no relay contact inputs. It has 4 common points. It is an AC/DC relay output module that is suitable for any application of relay contact type outputs. The relay contact module is vulnerable to chemical exposure because it may degrade the sealing materials. Therefore, the 1746-OW4 is recommended to inspect the module periodically to avoid any degradation and to quickly replace the module if there is any degradation. The 1746-OW4 module has 2 ranges of operating voltages: 5-125V DC and 5-265V DC. The signal delay for both the ON and the OFF state is 10 ms. The backplane current consumption of this module at both 5V DC and 24V DC is 0.045A for each. The minimum load current of this module is 1 mA at 5V DC. Please refer to the user manual to learn more about the continuous current per point in this module.
Application Areas

1746-OW4 is a digital output module produced by Allen-Bradley, belonging to the SLC 500 series. It has 4 output channels, each of which can independently control external devices and can drive various types of loads, such as indicator lights, solenoid valves, small motors, etc. Its typical application areas include the following three aspects:
- Industrial automation production line control: In automated production lines such as automobile manufacturing and electronic equipment production, 1746-OW4 can be used to control various actuators, such as controlling the start and stop of production lines, driving the movement of robotic arms, controlling the operation of conveyor belts, and the movement of cylinders. By precisely controlling these actuators, the production process can be automated and efficient, and product quality and production efficiency can be improved.
- Switch control in process control systems: In process control fields such as chemical, petroleum, and electricity, this module can be used to control various switch devices, such as valve switches, pump start and stop, etc. For example, according to parameters such as temperature, pressure, and liquid level in the production process, the corresponding valves and pumps are controlled by the 1746-OW4 module to achieve precise control of the production process and ensure the stability and safety of the production process.
- Equipment status indication and alarm system: In industrial equipment and automation systems, 1746-OW4 can be used to drive indicator lights, buzzers and other alarm devices to indicate the operating status and alarm information of the equipment in real time. When the equipment fails or an abnormal situation occurs, the module can control the corresponding indicator lights to light up or the buzzer to sound an alarm, reminding the operator to deal with it in time, reducing equipment damage and production accidents.
Technical specifications
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Part Number/Catalog No. | 1746-OW4 |
| Series | SLC 500 |
| Module Type | Digital Contact Output Module |
| Operating Voltage | 5-265 Volt AC or 5-125 Volts DC |
| Outputs | 4 |
| Output Types | N.O. Relay Contact |
| Current/Output (120 VAC) | 1.5 amps |
| Current/Output (24VDC) | 1.2 amps |
| Backplane Current | 45 milliamps |
| Applications | Relay Contact Outputs |
| Step Response | 60 milliseconds in, 2.5 milliseconds out |
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