1746-1B32

Overview of Allen-Bradley 1746-IB32 SLC 500 Digital DC Input Module

The Allen-Bradley 1746-IB32 is a SLC 500 high-density digital input module with 32 sinking DC input channels. It is designed for general-purpose DC input interfacing, supporting a voltage range of 15–30 V DC (sink), making it suitable for connecting a wide variety of sensors, switches, and contacts in industrial automation applications.

Key Features of 1746-IB32

• Inputs: 32 sinking DC input channels.
• Operating Voltage Range: 15–30 V DC at 50°C, 15–26.4 V DC at 60°C.
• Input Voltage: 24 V DC nominal.
• Backplane Current Draw: 103 mA at 5 V DC, 0 mA at 24 V DC.
• Power Dissipation: 0.20 W per channel, 6.65 W per module.
• Input Delay Time (OFF to ON): 3 ms.
• Off-State Current: 1 mA per channel.
• Step Response: 100 ms in, 2.5 ms out.
• Shock Rating: 30G (industrial robustness).
• I/O Connection: Compatible with Allen-Bradley 1746-HT and 1746-HCA connectors.
• Certifications: UL, C-UL, CE, Class I Division 2 (hazardous area).

Technical Specifications

Applications / Use Cases

This module is widely used for monitoring and high-density acquisition of discrete signals from devices like limit switches, pushbuttons, and proximity sensors, and is ideal for applications demanding many input points and compact panel layouts in SLC 500 control systems.