Allen-Bradley 1756-IM16I ControlLogix 16 Point D/I Module

Product Summary

The 1756-IM16I is a ControlLogix 16-point isolated digital input module. It provides 16 individually isolated inputs rated for 240 VAC, suitable for high-voltage discrete signal monitoring in ControlLogix systems.

Core Specifications

• Catalog Number: 1756-IM16I
• Module Type: 16-Point Isolated Digital Input Module (240 VAC)
• Compatible Platform: ControlLogix (1756 chassis)
• Input Points: 16 (individually isolated)
• Rated Voltage: 240 VAC nominal
• Input Voltage Range: 159–265 VAC

Electrical Characteristics

• On-State Voltage: 159–265 VAC
• Off-State Voltage: 0–40 VAC
• On-State Current: 5 mA minimum per point
• Input Delay Time: Configurable (typically 1–2 ms ON, 9–10 ms OFF)
• Isolation: 250 V continuous / 1500 V for 1 minute (point-to-point and field-to-backplane)
• Backplane Current: ~100 mA @ 5 VDC, ~2 mA @ 24 VDC

Installation Guide

1. Install the module in any slot of a 1756 ControlLogix chassis.
2. Use a removable terminal block (RTB) for field wiring (1756-TBCH or 1756-TBS6H recommended).
3. Configure the module in Studio 5000 Logix Designer, including input filter times and diagnostics.
4. Verify operation using module status LEDs and controller diagnostics.

Selection Guidelines

• Select 1756-IM16I when individual isolation and 240 VAC inputs are required.
• For non-isolated 240 VAC inputs, consider 1756-IA16 or similar modules.
• Ensure chassis power supply has sufficient capacity for the module’s backplane draw.

Frequently Asked Questions