B&R Industrial Automation X20DI8371 Digital Input Module

Description:

The B&R X20DI8371 X20 DI 8371 PLC Module Rev D0 is used in industrial automation systems as a digital input module for acquiring 24 VDC discrete signals from field devices such as sensors, switches, and machine safety contacts. It is part of the B&R X20 distributed I/O system designed for modular PLC architectures, enabling high-density signal acquisition with reliable bus communication and configurable input filtering. Commonly installed in manufacturing automation systems, machine control panels, packaging equipment, and industrial production lines where accurate and fast digital signal acquisition is required. Maintenance engineers, OEM machine builders, and system integrators use this module for replacement of failed I/O modules, system expansion, and restoration of PLC input functionality.

Applications:

The B&R X20DI8371 is used in industrial PLC and automation systems to read discrete 24 VDC input signals from sensors, limit switches, and control devices. It is commonly applied in automated production machinery, conveyor systems, robotics cells, and process control systems where distributed input acquisition and modular I/O expansion are required.

Technical Specifications:

• Manufacturer: B&R Industrial Automation (ABB Group)
• Model / Part number: X20DI8371 (Rev D0)
• Product type: Digital input PLC module
• Series: B&R X20 system
• Number of inputs: 8 digital inputs
• Input voltage: 24 VDC
• Input type: Sink (1-wire connection)
• Input current: ~3.75 mA per channel
• Switching threshold: Low <5 VDC / High >15 VDC
• Input filtering: Configurable hardware/software filtering (microsecond to millisecond range)
• Electrical isolation: Channel-to-bus isolation (approx. 500 Veff)
• Mounting: DIN rail X20 modular system (requires bus base module)
• Power consumption: ~0.18 W bus power
• Operating temperature: -25°C to +60°C (installation dependent)
• Protection rating: IP20
• Application environment: Industrial automation and machine control systems

Common Replacements:

• B&R X20DI9371 12-channel digital input module 
• Siemens ET200SP DI 8x24VDC digital input module
• Allen-Bradley 1756-IB8 ControlLogix 24V DC input module