1756-IB16I | Allen Bradley | ControlLogix Series | 16-Channel Isolated DC Input Module

Product Description

The 1756-IB16I input module from Allen Bradley’s ControlLogix series is a high-performance digital DC input unit designed for applications requiring isolated input channels. With sixteen individually isolated inputs, it ensures reliable signal integrity and enhanced protection in complex automation systems. Its configurable filter times and fast cyclic update capability make it suitable for demanding industrial environments.

Technical Specifications

• Manufacturer: Allen Bradley

• Product Line: ControlLogix

• Part Number: 1756-IB16I

• Category: PLC Input Module

• Module Type: Digital DC Input (Isolated)

• Number of Inputs: 16 individually isolated channels

• Nominal Input Voltage: 24 VDC

• Operating Voltage Range: 10–30 VDC

• Minimum ON-State Current: 2 mA @ 10 VDC

• Maximum ON-State Current: 10 mA @ 30 VDC

• Maximum OFF-State Current: 1.5 mA

• Signal Delay (ON transition): Hardware delay ≤1 ms + user-selectable filter (0, 1, or 2 ms)

• Signal Delay (OFF transition): Hardware delay ≤4 ms + user-selectable filter (0, 1, 2, 9, or 18 ms)

• Cyclic Update Time: 200 µs to 750 ms

• Backplane Current Draw:

• 100 mA @ 5.1 VDC

• 3 mA @ 24 VDC

• Total Backplane Power: 0.58 W

• Power Dissipation (Max): 5 W @ 60 °C

• Removable Terminal Blocks (RTB): 1756-TBNH, 1756-TBSH

• Weight: 0.44 lbs (0.20 kg)

• Enclosure Type: Open-style

Key Features

• Sixteen isolated DC inputs for enhanced signal integrity.

• Configurable input filter times for noise reduction.

• Fast cyclic update times for real-time control applications.

• Compact single-slot design compatible with ControlLogix chassis.

• Reliable performance across industrial temperature ranges.

Application Scenarios

• High-reliability automation systems requiring isolated inputs.

• Process control environments with mixed signal sources.

• Distributed control systems needing noise-resistant input modules.

FAQ

Q: What makes the 1756-IB16I different from the 1756-IB16?   A: The 1756-IB16I provides individually isolated inputs, while the 1756-IB16 groups inputs without isolation.

Q: What filter times can be configured?  A: ON transition filters: 0, 1, or 2 ms; OFF transition filters: 0, 1, 2, 9, or 18 ms.

Q: Which terminal blocks are compatible?  A: The module supports 1756-TBNH and 1756-TBSH removable terminal blocks.