Product Summary
The 1746-IO4 from Allen-Bradley combines two digital inputs and two outputs into a single SLC 500 module. This unit operates on 85 to 132 Volts AC for inputs. It uses relay outputs that handle 100 to 120 VAC power. Engineers value this module for space-saving design and reliable performance in compact control systems. Its self-lifting terminal plate accepts two 14 AWG wires securely.
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Why Choose the 1746-IO4 for Your System?
This module delivers a perfect mix of input and output channels. The unit has exactly two inputs in one common group. It also has two outputs arranged in one common group. This configuration simplifies wiring for basic machine control tasks. You get a complete I/O solution without needing extra modules. The 1746-IO4 reduces panel space and lowers overall system cost.
Critical Electrical Specifications to Consider
The operating voltage range is 85-132 Volts AC at 47-63 Hertz. Input power must route separately from the I/O device cable. Outputs handle up to 1.5 amps at 120 VAC or 1.2 amps at 24 VDC. The continuous current rating for this module is 4 amps. Signal delay sits between 35 and 45 milliseconds for reliable switching. Backplane current consumption is only 0.030 mA at 5 VDC. These specs ensure stable operation in demanding industrial environments.
Environmental Durability for Harsh Floors
The 1746-IO4 operates between -25 and 60 degrees Celsius. Non-operating temperature ranges from -40 to 85 degrees Celsius. Relative humidity tolerance spans 5% to 95% without condensation. Operating vibration displacement peaks at 0.015 inches between 5 and 57 Hertz. The module withstands an operating shock of 10 g. These ratings make it ideal for factory floors and process control applications.
Installation and Wiring Best Practices
Mount the 1746-IO4 securely into any SLC 500 chassis slot. Use the self-lifting terminal plate for easy wire insertion. Each terminal accepts two 14 AWG cables up to 2 millimeters. Route input power separately from the I/O device cable to prevent noise. LED indicators on the front panel show input point status clearly. The status light activates when the correct signal reaches the input terminal.
Power Dissipation and Thermal Management
Each input channel dissipates only 0.27 Watts during normal operation. This low heat output allows dense module placement without cooling concerns. The backplane draws 25-30 milliamps total from the chassis power supply. Proper airflow around the module ensures long-term reliability. No additional heat sinking is required for most installations.
Logistics & Standard Packaging Details
- One Allen-Bradley 1746-IO4 combination I/O module
- Standard anti-static packaging for safe transport
- Quick-start installation guide included
- Express delivery shipping available via FedEx, UPS, and DHL
