Product Summary
The Allen-Bradley 1746-IM4 SLC 500 digital AC input module offers four robust inputs. It handles a wide voltage range from 170 to 265 Volts AC. This module draws only 35 milliamps from the 5 Volt DC backplane. It provides reliable signal detection for industrial automation systems.
Theme: Product Procurement & Buyer Guide
Understanding the 1746-IM4 Voltage Specifications
This specific module operates on a nominal 200-240V AC line. You must verify your facility’s line frequency matches the 47-63 Hz range. The module accepts a broad operational voltage between 170 and 265V AC. This wide range ensures stable operation during minor power fluctuations. Procurement teams should confirm this voltage compatibility before ordering.
Input Channel Count and Electrical Characteristics
The 1746-IM4 features exactly four AC input channels for your system. Each input point draws a nominal current of 12 milliamps at 240V AC. The module can handle a maximum current surge of 1.6 Amps. This surge lasts for a brief 500 microsecond duration per point. This robust design protects against transient electrical noise on the line.
Backplane Power and Isolation Requirements
This module requires a chassis backplane current of only 0.035 Amps. It draws zero current from the 24 Volt DC backplane supply. The module provides circuit isolation tested at 1500 Volts AC. This isolation exists between the backplane and the I/O circuits. This feature protects your SLC 500 processor from high-voltage faults.
Signal Delay and Response Times for Control Logic
The input signal has a maximum ON delay of 35 milliseconds. The OFF condition delay is slightly longer at 45 milliseconds. The step response time measures 100 milliseconds for input signals. The output step response is much faster at 2.5 milliseconds. Control engineers must account for these delays in their logic.
Off-State Performance and Power Dissipation
In the OFF state, the module has a maximum voltage loss of 50V AC. The maximum leakage current in this state is only 2.0 milliamps. This low leakage prevents false triggering of downstream devices. The maximum wattage on each input point is 0.35 Watts. The total power dissipation for the entire module is just 1.6 Watts.
Physical and Environmental Tolerances for Installation
The module withstands an operational shock of 30 G force. It also handles vibration of 2.5 G at 57-500 Hertz frequency. The operating temperature ranges from 0 to 60 degrees Celsius. The humidity range is 5 to 95 percent non-condensing during operation. Storage temperature extends from -40 to 85 degrees Celsius for long-term holds.
Certifications and Noise Immunity Standards
This module holds UL-A196, CSA, and C-UL certifications for hazardous locations. It offers NEMA ICS 2-230 standard noise immunity for industrial environments. These certifications ensure compliance with safety regulations in your plant. The module connects to I/O via 1746-HT and 1746-HCA cables. This ensures a secure and reliable physical connection to field devices.
Logistics & Standard Packaging Details
- One Allen-Bradley 1746-IM4 SLC 500 Digital AC Input Module
- Standard anti-static packaging for safe transport and storage
- Product documentation and installation guide are included
- Express delivery shipping is available via FedEx, UPS, and DHL
