Product Specification – X20DI8371

1. General Information

• Manufacturer: B&R Industrial Automation (ABB Group)

• Part Number: X20DI8371

• Product Type: Digital Input Module

• Product Series: X20 System

• B&R ID-Code: 0xA4AB

• Certifications: CE, UKCA, cULus, ATEX Zone 2 (II 3G Ex nA nC IIA T5 Gc), EAC, DNV GL, ABS, Lloyd's Register

• Product Status: Active (Mass Production)

• Protection Class: IP20

• Module Width: 12.5 mm

2. Product Overview

3. Technical Specifications

3.1 Input Interface

• Input Channels: 8 × digital inputs (sink-type / NPN)

• Connection Type: 1-wire connections (single-wire signal input)

• Nominal Voltage: 24 VDC (-15% / +20%)

• Input Current: Typ. 3.75 mA per channel @ 24 VDC

• Input Resistance: Typ. 6.4 kΩB& R Industrial Automation

• Switching Threshold:

  • Low: < 5 VDC

  • High: > 15 VDCB& R Industrial Automation

• Input Filter:

  • Hardware: ≤ 100 μs

  • Software: Default 1 ms, configurable 0...25 ms (0.2 ms steps)

• Isolation: 500 V eff (channels vs. system bus)

• Input Characteristics: Type 1 (per EN 61131-2)

3.2 Electrical Parameters

• Supply Voltage: 24 VDC via X20 system bus

• Power Consumption:

  • System Bus: 0.18 W

  • Internal I/O: 1.2 WB& R Industrial Automation

• Protection: Reverse polarity, overvoltage, EMC protection

3.3 Mechanical & Environmental

• Mounting: Standard 35 mm DIN rail / X20 backplane

• Connector: Requires X20TB12 (12-pin screw terminal block)

• Operating Temperature:

  • Horizontal: -25°C ~ +60°C

  • Vertical: -25°C ~ +50°C

• Storage Temperature: -40°C ~ +85°C

• Humidity: 5 – 95% RH, non-condensing

• Vibration Resistance: 4 g (IEC 60068-2-6)

• Weight: Approx. 70 g

3.4 Diagnostics & Status

• LED Indicators:

  • Module status (Green/Red: Run/Error)

  • 8 × channel status LEDs (Green)

• Diagnostics: Module status, input state, power monitoringB& R Industrial Automation

• Hot Swapping: Supported

4. Key Features

• 8-Channel Sink Inputs: High-density NPN signal acquisition for 1-wire sensors

• 1-Wire Design: Simplified wiring, reducing installation time and cost

• Configurable Filtering: Hardware & software filters for optimal noise immunity

• Galvanic Isolation: 500 V isolation between channels and system bus

• Compact Design: 12.5 mm width, ideal for high-density I/O cabinets

• Industrial Certifications: ATEX Zone 2, marine & global safety approvals

• Full Diagnostics: Comprehensive LED & software-based monitoringB& R Industrial Automation

• Hot-Swappable: Maintenance without system shutdown

5. Typical Applications

• NPN proximity switch & 1-wire sensor signal acquisition

• Limit switch & push-button input monitoring

• High-density I/O in industrial machinery & control cabinets

• Conveyor & material handling systems

• Hazardous area (Zone 2) signal monitoring

• Marine/offshore equipment I/O

6. Compatibility

• Base Modules: All X20BM (bus modules) and X20BB (bus base modules)

• Terminals: X20TB12 (12-pin screw terminal)

• System: Fully compatible with all X20 CPUs (X20CPxxx)

• Software: B&R Automation Studio (configuration & diagnostics)