B&R X20PS9400 X20 System Power Supply Module 24 VDC

Product Overview

The B&R X20PS9400 (X20PS9400) is a specialized 24 VDC power supply module engineered for the B&R X20 system architecture, specifically designed to power the bus controller, X2X Link communication, and internal I/O modules. It is a critical component in industrial automation infrastructures such as automotive manufacturing lines, food processing plants, and high-speed packaging machinery where system uptime is non-negotiable. The module features galvanic isolation between the primary feed and the bus controller/X2X Link supply, preventing ground loop interference and enhancing signal integrity. Furthermore, it supports N+1 redundancy by allowing multiple units to operate in parallel, ensuring that a single power supply failure does not halt production. An integrated RS232 service interface facilitates direct on-site diagnostics and configuration, reducing mean time to repair (MTTR) during maintenance windows.

Hardware Architecture and Electrical Isolation

The X20PS9400 utilizes a dual-rail power distribution architecture. The Bus Controller and X2X Link supply (rated at 7 W nominal output) is electrically isolated from the input and the I/O supply rail. This isolation protects sensitive communication logic from noise generated by high-current I/O switching. The I/O supply path passes through without isolation but supports a maximum contact load of 10 A, requiring an external 10 A slow-blow fuse on the input line.

Key hardware characteristics include:

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  Redundancy: Supports parallel operation for BC/X2X Link supply redundancy. If one module fails, the other instantly takes over the full load without interrupting the bus controller.

   

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  Protection: Integrated non-replaceable fuse for the BC/X2X Link side; reverse polarity protection on the BC/X2X input; short-circuit proof outputs.

   

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  Diagnostics: Four LED indicators (Overload, Operating State, Module Status, RS232) provide immediate visual fault identification.

   

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  Interface: 1x RS232 service port (max 115.2 kbit/s) connected via the X20TB12 terminal block (ordered separately).

   

Technical Specifications

FAQs

What specific components does the X20PS9400 power within the X20 rack?

It powers the X20 Bus Controller (BC), the X2X Link communication bus, and the internal electronics of the I/O modules. It also distributes 24 VDC to the field I/O terminals, though the I/O power rail is not isolated from the input.

Can I use this module for redundant power supply configurations?

Yes. The X20PS9400 is designed for redundant operation. You can install two modules side-by-side; they will load share for the Bus Controller and X2X Link supply. If one module fails, the other maintains power to the controller and bus without interruption. Note that the I/O supply portion does not support this redundancy natively via the module itself.

Is the RS232 interface isolated from the rest of the system?

No. According to the technical documentation, the RS232 service interface is not isolated from the bus. Exercise caution when connecting service laptops or diagnostic tools directly to the module in electrically noisy environments.

Does the listed shipping weight of 2 kg refer to the module alone?

No. The module itself weighs approximately 0.15 kg. A shipping weight of 2 kg typically indicates the weight includes protective packaging, the required separate terminal block (X20TB12), and potentially the bus base module (X20BB8x), which must be ordered separately for operation.

Field Installation and Wiring Guidelines

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  Mandatory Accessories: The X20PS9400 is a modular component and does not ship with connectors. You must order the 12-pin terminal block X20TB12 and the appropriate bus base module (e.g., X20BB80 or X20BB81) separately. Installation without the base module is impossible.

   

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  Fusing Requirements: The I/O supply input requires an external line fuse (Max 10 A, slow-blow type). The BC/X2X Link side has an integrated, non-replaceable fuse. Ensure your external power supply can handle the inrush current if utilizing the redundancy feature.

   

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  Thermal Management: When mounting horizontally, the unit operates up to 60 deg C. If mounted vertically, derate the maximum ambient temperature to 50 deg C. Ensure adequate spacing above and below the module for convection cooling, especially when multiple high-wattage I/O modules are installed adjacent to it.

   

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  Service Interface Wiring: Use shielded twisted pair cable for the RS232 service interface connections to minimize electromagnetic interference (EMI) in high-noise industrial environments like mining or heavy machining.