Product Summary
The Allen-Bradley 1746-IM8 is a robust digital AC input module for the SLC 500 system. This unit provides eight isolated input channels. It accepts a wide voltage range from 170 to 265 Volts AC. Engineers use this module for reliable high-voltage sensing in harsh factory environments. Its design prioritizes safe operation in industrial control panels.
Theme B: Step-by-Step User & Installation Guide
Safely Mounting Your 1746-IM8 Module
You must install this unit as open-type equipment. The 1746-IM8 requires an enclosure that limits access. Only qualified personnel should handle the installation process. Always cut all power to the system before you begin. Secure the area to prevent accidental re-energization. Mount the module firmly into the SLC 500 chassis.
Understanding the Power Requirements
This module draws only 50 milliamps from the 5V backplane. It does not require any current from the 24V backplane. The input voltage range spans from 170 to 265 Volts AC. The operating frequency must stay between 47 and 63 Hertz. This wide range ensures stable operation even with fluctuating line power. The module dissipates just 3.1 Watts of total heat.
Wiring Your Input Channels Correctly
You have eight input channels available for connection. Use the designated 1746-HT or 1746-HCA wiring assemblies. The off-state current for each channel is only 2 milliamps. This low leakage current prevents false triggering of your sensors. Ensure all wiring complies with local electrical codes. Keep equipment connected until power is completely removed.
Environmental Operating Conditions
The unit operates reliably in temperatures from -25 to 60 degrees Celsius. It can survive non-operating temperatures from -40 to 85 degrees Celsius. The module handles relative humidity between 5% and 95% without condensation. It withstands operating vibration of 1.0 g at 5 to 2000 Hertz. The module also endures a 30 g operating shock rating. These specs make it suitable for Pollution Degree 2 environments.
Understanding Signal Response Times
The input signal delay measures either 35 or 45 milliseconds. This delay filters out electrical noise from AC line signals. The step response is 100 milliseconds for the input side. The output side responds in just 2.5 milliseconds. This fast output response ensures quick communication with your controller. Use these timing values for precise application logic design.
Ensuring Proper Module Identification
Verify you have the exact catalog number 1746-IM8 before installation. This module is manufactured by Rockwell Automation under the Allen-Bradley brand. It belongs to the trusted SLC 500 series of I/O modules. The module type is a Digital AC Input Module. Its primary application includes general purpose 125 Volts DC inputs. Always check the series number matches your existing system.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1746-IM8 SLC 500 Digital AC Input Module
- Product is shipped in anti-static protective packaging
- Unit is supplied as open-type equipment for panel installation
- No additional wiring harnesses or connectors are included
- Express shipping is available via FedEx, UPS, and DHL
