B&R X20 Modules: X20AI4622 Analog Input Module —

Technical Dossier

Product Details And Specifications

B&R X20 Series: Comprehensive Module Range and Technical Overview

The B&R X20 system is a modular I/O and controller platform engineered for deployment in high-demand process industries including petrochemical refining, nuclear power generation, pharmaceutical manufacturing, and continuous-process chemical plants. Developed by Bernecker + Rainer Industrie-Elektronik GmbH (now part of ABB), the X20 system has achieved widespread installation across European and Asian heavy industrial facilities due to its deterministic real-time performance, compact rail-mount form factor, and native integration with B&R Automation Studio. The platform operates on a proprietary X2X Link backplane bus, enabling high-speed, synchronous data exchange between distributed I/O nodes and central CPUs at cycle times as low as 400 µs. Its IP20-rated modular architecture supports hot-swap capability on select modules, reducing planned maintenance windows in 24/7 continuous-operation environments.

The Evolution of X20 Architecture

The X20 system was introduced in the early 2000s as a successor to B&R's earlier 2003, 2005, and Provit/Net series controllers, consolidating distributed I/O, motion, and safety functions into a single unified bus topology. The first-generation X20 modules used a parallel backplane interface; subsequent hardware revisions migrated to the serial X2X Link protocol, which remains the current standard. The X20 platform introduced the concept of the X20 Bus Controller (BC) as a gateway between POWERLINK, PROFIBUS, EtherNet/IP, and Modbus TCP fieldbus networks, enabling backward compatibility with legacy DCS architectures during phased plant upgrades. As of 2024, the X20 series is in its mature phase. B&R continues to manufacture and support the full catalog, but several first-generation CPU and communication modules have been superseded by X20cP-series compact controllers and the X20 Edge Controller. Facilities operating original X20 hardware should evaluate long-term spare parts inventory strategies, as lead times for certain analog and specialty modules have extended to 16–26 weeks from authorized distributors.

X20 Full Catalog & Functionalities (SKU List)

The following represents a structured index of commonly deployed X20 series modules, organized by functional category. All models listed are verified X20 platform components.

Analog Input Modules

• X20AI4622: 4-channel ±10 V / 0–20 mA analog input, 13-bit resolution, X2X Link interface
• X20AI4632: 4-channel analog input, 16-bit resolution, configurable voltage/current ranges
• X20AI8321: 8-channel analog input, 12-bit, single-ended, 0–10 V / 0–20 mA
• X20AI8322: 8-channel analog input, 13-bit resolution, ±10 V / 0–20 mA, differential
• X20AT6402: 6-channel thermocouple input module, types J/K/N/R/S/T, cold junction compensation
• X20AT2222: 2-channel RTD/resistance input, PT100/PT1000/Ni100/Ni1000 compatible

Analog Output Modules

• X20AO4622: 4-channel analog output, ±10 V / 0–20 mA, 13-bit resolution
• X20AO4632: 4-channel analog output, 16-bit resolution, voltage and current configurable

Digital Input Modules

• X20DI9371: 12-channel digital input, 24 VDC, sink/source, 0.2 ms filter
• X20DI6371: 6-channel digital input, 24 VDC, configurable input filter
• X20DI4371: 4-channel digital input, 24 VDC, high-speed counter capable

Digital Output Modules

• X20DO9322: 12-channel digital output, 24 VDC, 0.5 A per channel, short-circuit protected
• X20DO6322: 6-channel digital output, 24 VDC, 2 A per channel

CPU / Controller Modules

• X20CP1484: X20 CPU, 400 MHz, 64 MB DRAM, CompactFlash slot, POWERLINK managing node
• X20CP1585: X20 CPU, 500 MHz, 128 MB DRAM, dual Ethernet, USB, SD card
• X20CP3585: X20 CPU, 500 MHz, 256 MB DRAM, extended I/O addressing, real-time OS

Communication / Bus Controller Modules

• X20BC0083: X20 Bus Controller, POWERLINK V2 managing/controlled node
• X20BC0087: X20 Bus Controller, EtherNet/IP adapter, 100 Mbit/s
• X20BC0073: X20 Bus Controller, PROFIBUS DP slave, up to 12 Mbit/s

Power Supply Modules

• X20PS9400: X20 internal power supply, 24 VDC input, supplies X2X Link bus
• X20PS9402: X20 internal power supply with diagnostics, 24 VDC, bus and field power separated

Sourcing Hard-to-Find & Obsolete X20 Parts

DriveKNMS maintains a dedicated inventory program for X20 series modules that have been discontinued or placed on extended lead time by B&R's authorized distribution network. For process plants operating on multi-decade maintenance cycles — common in nuclear, refining, and bulk chemical sectors — the inability to source a single I/O module can halt an entire control loop. DriveKNMS sources X20 modules through verified secondary market channels, including decommissioned plant asset liquidations, authorized surplus dealers, and factory-refurbished stock. Each unit is individually serialized and cross-referenced against B&R's published hardware revision history to confirm firmware compatibility with the target system version. For modules such as the X20AI4622, X20CP1484, and first-generation X20BC bus controllers, DriveKNMS holds buffer stock specifically to support emergency breakdown orders with same-day dispatch capability for in-stock items.

Quality Control for the X20 Range

X20 modules present specific test challenges due to their integrated X2X Link backplane interface and the tight coupling between hardware revision and Automation Studio firmware version. DriveKNMS applies a multi-stage verification protocol to all X20 units processed through its facility. Each module undergoes visual inspection for backplane connector pin integrity, capacitor condition, and conformal coating status. Functional testing is performed using a live X20 rack with a compatible X20CP CPU running Automation Studio, verifying that the module enumerates correctly on the X2X Link bus, reports accurate hardware revision data, and passes channel-level I/O verification. For analog modules including the X20AI4622, each input channel is tested across the full ±10 V and 0–20 mA range using calibrated signal sources, with output linearity verified against the published 13-bit resolution specification. Communication modules are tested for fieldbus enumeration, cyclic data exchange, and diagnostic register integrity. All test results are logged and retained for traceability.

For X20 series availability, pricing, and technical compatibility inquiries:

• Email: sale@driveknms.com
• WhatsApp: +86 18359293191
• Web: driveknms.com

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.