Allen-Bradley 1756-IB32 ControlLogix 32 Pt 12/24V DC D/I Module

Description 

The Allen-Bradley 1756-IB32 is a high-density digital input module for the ControlLogix platform. It provides 32 DC input channels, divided into two groups of 16, for monitoring discrete field devices. Designed for 12/24 VDC sink inputs, the module offers configurable filtering and diagnostics, making it well-suited for large-scale industrial automation systems.

Technical Specifications 

Information About 1756-IB32

The 1756-IB32 belongs to the ControlLogix family of I/O modules, designed for installation in a local or remote chassis. Each channel can handle a nominal input of 24 VDC within a voltage range of 10–31.2 VDC. The module draws 120 mA at 5.1 VDC and 2 mA at 24 VDC from the backplane, with a total backplane power consumption of 0.66 W. Maximum power dissipation is 6.2 W and thermal dissipation is 21.1 BTU/h at 60 °C. The module supports configurable input filters (0, 1, 2 ms for OFF→ON, and up to 18 ms for ON→OFF), helping reduce noise and false transitions. It also supports up to 250 mA inrush current, decaying to less than 37% in 22 ms. Diagnostic features allow detection of faults and backplane status, while channel status indicators provide quick visual feedback. The 1756-IB32 is compatible with 1756-TBCH and 1756-TBS6H removable terminal blocks for wiring. Typical applications include high-density monitoring of switches, sensors, and other 24 VDC devices in ControlLogix-based systems.

Key Features:

• Design: High-density ControlLogix digital input module.
• Channels: 32 inputs, organized into two groups of 16.
• Voltage Category: 12/24 VDC sink; operating range 10–31.2 VDC.
• Backplane Current: 120 mA @ 5.1 VDC; 2 mA @ 24 VDC.
• Power Dissipation: 6.2 W max; 21.1 BTU/h thermal dissipation.
• Response Times: OFF→ON hardware delay up to 380 µs + filter; ON→OFF delay up to 420 µs + configurable filter (0–18 ms).
• Inrush Current: 250 mA, decays to <37% within 22 ms.
• Diagnostics: Module and channel diagnostics with minor/major fault reporting.
• Wiring: Compatible with 1756-TBCH and 1756-TBS6H RTBs (sold separately).
• Mounting: Fits in any ControlLogix chassis slot.
• Applications: Suitable for large-scale digital input monitoring in manufacturing, process control, and SCADA systems.

The 1756-IB32 delivers high-density input capacity, diagnostic intelligence, and flexible integration, making it a reliable solution for ControlLogix-based automation.

Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.