Product Summary
The 1746-IM8 is a robust digital AC input module from the SLC 500 series. This module provides eight high-voltage inputs for general-purpose applications. It operates reliably across a wide temperature range and harsh industrial environments. Engineers trust this unit for its proven performance and long service life.
Expert Technical Evaluation & Performance Review
This module delivers stable signal processing for demanding control tasks. It accepts a wide input voltage range from 170 to 265 Volts AC. The 1746-IM8 operates at a frequency of 47 to 63 Hertz. This flexibility makes it ideal for global power systems with varying line conditions. The module draws only 50 milliamps from the 5 Volt backplane bus. This low current draw minimizes the overall power supply load within the chassis. It dissipates a total heat output of just 3.1 Watts. This low thermal footprint helps maintain a cooler operating environment inside the enclosure. The module offers a signal delay of either 35 or 45 milliseconds. This predictable delay ensures consistent timing for input scanning routines. The step response for input signals is 100 milliseconds. The output step response is a very fast 2.5 milliseconds. This fast output response allows for quick status updates to the processor. The off-state current is a low 2 milliamps. This low leakage current prevents false triggering of sensitive input circuits. The module has a voltage category of 200/240 Volts AC. It also supports general-purpose 125 Volts DC inputs. This dual voltage capability adds significant application versatility.
Environmental Tolerance & Installation Protocols
This unit handles extreme temperature conditions without performance loss. It operates in ambient temperatures from -25 to 60 degrees Celsius. Non-operating temperatures can range from -40 to 85 degrees Celsius. This wide range allows for safe storage in unheated warehouses. The relative humidity tolerance sits between 5% and 95% without condensation. This high humidity rating prevents corrosion in damp manufacturing areas. The module withstands operating vibration of 1.0 g at 5 to 2000 Hertz. It also endures a 30 g operating shock. These rugged specs make it suitable for heavy machinery and conveyor lines. The unit is supplied as open-type equipment for Pollution Degree 2 environments. It is approved for use in Zone 2 hazardous locations. Installers must mount the module inside a suitable enclosure. This enclosure must only be accessible by using a tool or key. Always disconnect all power sources before removing or installing the module. Keep the equipment connected to ground until power is fully cut. The I/O connection uses 1746-HT or 1746-HCA wiring arms. These arms provide secure and reliable field wiring terminations.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1746-IM8 SLC 500 Digital AC Input Module
- This module is sold in a static-safe protective packaging.
- Express delivery shipping is available via FedEx, UPS, and DHL.
