Allen Bradley 1756-IA16 Digital Input Module

The AB 1756-IA16 is a 16-channel digital input module designed for monitoring 79–132V AC signals within ControlLogix systems. Supporting nominal 120V AC inputs, it provides dependable signal acquisition from field devices such as limit switches, proximity sensors, and pushbuttons in industrial environments.

This module features a compact 38.1 mm width, plug-in 20-pin connector, and is easily configured through Studio 5000 for seamless integration into your Logix-based control system.

Technical Specifications

Model: 1756IA16
Series: ControlLogix
Type: Digital Input Module
Channels: 16 digital inputs
Input Voltage Range: 79…132 V AC
Nominal Input Voltage: 120 V AC
Input Type: AC (sinking logic)
Mounting: ControlLogix chassis slot
Connection Type: 20-pin plug-in terminal block

Electrical Specifications

Input Current at Signal High (1): 2 mA per channel
Signal Delay: 0.5 ms ON / 0.5 ms OFF (typical)
Input Threshold:
• ON ≥ 79 V AC
• OFF ≤ 30 V AC
Leakage Current: <2 mA per point
Short-Circuit Protection: Not included (external protection recommended)
Backplane Current Draw:
• 5.1V DC @ 150 mA
• 24V DC @ 85 mA
Power Dissipation: Approx. 3.2 W
Heat Dissipation: Approx. 10.9 BTU/hr
Isolation Voltage: 250V continuous (field to backplane), basic insulation

Network & Interface Specifications

System Integration:

• Backplane Communication: ControlLogix standard
• Configuration Software: Studio 5000 Logix Designer
• Diagnostics: Channel-level input status and fault detection

Supported Protocols:
Not directly networked – communicates via backplane to the controller

I/O Compatibility: Fully supports mixed module configurations within ControlLogix chassis

Mechanical Specifications

Width: 38.1 mm
Height: 300 mm
Depth: 111.25 mm
Mounting Orientation: Vertical (standard chassis slot)
Enclosure Type: Open-type for cabinet installation
Terminal Block: Removable 20-pin plug-in connector
Weight: Approx. 0.4 kg

Environmental Specifications

Operating Temperature: 0…60 °C
Storage Temperature: –40…85 °C
Relative Humidity: 5% to 95% non-condensing
Shock Rating: 30 g operating, 50 g non-operating
Vibration Resistance: 2 g @ 10–500 Hz
Pollution Degree: 2
Certifications: Suitable for Class I Div 2 hazardous locations

Compliance & Certifications

Certifications: UL, c-UL, CE, RoHS
SIL/PL Rating: Not rated
Explosion Safety (Gas/Dust): None
EMC Compliance: EN 61000-6-2 / 6-4
Standards Met: EN 61131-2
Functional Safety: Not applicable

Key Features & Benefits

✅ 16 AC Input Channels – Ideal for monitoring high-voltage field signals up to 132V AC

✅ Nominal 120V AC Compatibility – Matches common industrial supply voltages

✅ Fast 0.5 ms Switching – Accurate state detection for time-sensitive applications

✅ 20-Pin Terminal Block – Simplifies wiring and maintenance

✅ Studio 5000 Integration – Seamless setup and diagnostics with Logix controllers

📦 Order the 1756-IA16 Allen Bradley from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 1756-IA16 prices. This ControlLogix AC input module delivers rugged, high-speed input monitoring for industrial automation—available now with expert support and fast shipping.

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