Product Overview
The Allen-Bradley 1746-IM16 is a discrete AC input module from the SLC 500 series, designed to reliably interface 170-265V AC signals into your control system. With sixteen input channels in a single group, this module provides a compact and efficient solution for monitoring AC-powered devices such as limit switches, push buttons, and proximity sensors. Its robust design ensures accurate signal detection in demanding industrial environments, making it a dependable choice for both new installations and system expansions.
Technical Specifications
Below are the key technical parameters for the Allen-Bradley 1746-IM16:
| Specification |
Value |
| Module Type |
AC Input Module |
| Series |
SLC 500 |
| Inputs |
16 |
| Input Voltage Range |
170-265 VAC, 47-63 Hz |
| Off-state Voltage, max |
30V AC |
| Off-state Current, max |
2 mA |
| Input Current |
12 mA @ 120V AC, nom |
| Inrush Current, max |
0.8 A |
| Inrush Current Time Duration, max |
0.5 ms |
| Backplane Current (5 Volts DC) |
85 milliamps |
| Signal Delay ON |
35 ms |
| Signal Delay OFF |
45 ms |
| Step Response |
100 ms in, 2.5 ms out |
| Operating Temperature |
0...+60 °C (+32...+140 °F) |
| Storage Temperature |
-40°C to +85°C (-40°F to +185°F) |
| Relative Humidity |
5 to 95% without condensation |
| I/O Connection |
1746-HT and 1746-HCA |
| Agency Certification |
UL / C-UL listed Class I, Division 2, Groups A, B, C, D; CE marked; C-Tick marked |
Key Features & Benefits
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High-Voltage AC Input Handling: The 1746-IM16 accepts 170-265V AC, making it suitable for direct connection to industrial AC signals without external converters.
-
Fast Signal Response: With a 35 ms ON delay and 45 ms OFF delay, the module ensures timely detection of input state changes.
-
Robust Electrical Isolation: Provides reliable isolation between the input terminals and the control logic, reducing noise interference.
-
Compact Single-Slot Design: Occupies only one slot in the SLC 500 chassis, saving space for other modules.
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Wide Environmental Tolerance: Operates reliably in temperatures from 0 to 60 °C and humidity up to 95% non-condensing.
Installation & Setup
Installing the Allen-Bradley 1746-IM16 is straightforward. The module fits directly into any SLC 500 chassis, including local, expansion, or distributed racks. Use the compatible 1746-HT or 1746-HCA terminal blocks for wiring. Ensure the input voltage is within the specified range (170-265V AC) before powering the module. The module is keyed to prevent incorrect insertion, and no additional configuration is required for basic operation.
Compatibility & Integration
The 1746-IM16 is fully compatible with all SLC 500 processors and chassis. It can be used in local racks, expansion racks, or as part of a distributed I/O system. The module communicates with the processor via the backplane, requiring no special software setup. Its 16-point grouping simplifies wiring and reduces installation time.
Applications
This module is ideal for applications that require monitoring of AC-powered devices, such as:
- Motor starter status monitoring
- Conveyor system interlocking
- Valve position sensing
- Industrial machine control panels
Its ability to handle 170-265V AC makes it a versatile choice for global installations where line voltages vary.
Selection Guide & Purchasing Advice
When purchasing the Allen-Bradley 1746-IM16, verify the part number and ensure it matches your system requirements. Consider the number of inputs needed and the compatibility with your existing SLC 500 chassis. For reliable sourcing, PLC Source PRO offers genuine modules with fast shipping and competitive pricing. Always confirm the operating environment (temperature, humidity) aligns with the module's specifications to ensure long-term reliability.