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Marvo Part ID: MV-BNF

£979.95 (ex. VAT)


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Specification Description
Part Number 3CP153.9
Alternative Part Number 3CP1539
Manufacturer B&R
Category PLC Systems
Memory 64 kB SRAM
Standard Communication Interface RS232
Application Interface (IF1) RS232, 9 pin D-type connector, No electrical isolation, Max. Baudrate 64 kBaud
Application Interface (IF2) RS485 / RS422 / TTY, 9 pin D-type connector (F), Electrical isolation, Max. Baudrate 347 kBaud
Detachable Key Switch Yes
Reset Button Yes
Cold Start Button Yes
Status Display LEDs
RAM Buffering Lithium Battery (in APM) min. 1 year, NiCd Battery (in CPU) min. 1 week, Gold Leaf Capacitor (in CPU) min. 10 min
Battery Monitoring Yes
Power Output (inc. APM) max. 6 W
Storage Temperature with inserted APM inc. lithium battery: -20 °C to +60 °C
Relative Humidity 0 to 95 % (non-condensing)
Dimensions (H, W, D) 165 mm x 80 mm x 110 mm
Commodity Code 853710

Commonly Asked Questions

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Is my order covered by a warranty?

Marvo provides a full 12-month warranty on all products, whatever the condition. For your peace of mind, all parts are ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. If you are unhappy with the part(s) you received and would like to request a return, you can do so by completing our quick and easy online form. Once we have received your Returns Request, a member of the team will be in touch to discuss this further with you. You can read more about our warranty policy here.


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Marvo currently delivers to the United Kingdom (excluding Northern Ireland), the United States of America and Germany. If you cannot find your delivery address at checkout, this is most likely because Marvo does not currently deliver to this location. There are ongoing efforts to make Marvo accessible to a global market, keep your eyes peeled as our service expands to new locations. All orders are sold with a streamlined delivery process ensuring that you get your part, fast. Marvo is designed to offer you quick, easy and reliable access to critical components and uses well established global shipping services, including but not limited to DHL, UPS and FedEx.


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Marvo is a highly credible supplier of industrial automation parts and components with dedicated hubs around the world offering industry-leading products and services.  Marvo is committed to providing a quick, easy and reliable place to source your automation and control components. All purchases come as standard with a comprehensive 12-month return to base warranty meaning that, in just a few clicks, you can source critical parts more seamlessly than ever before. Click here to read an article on how Marvo is redefining convenience for automation and manufacturing professionals.


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Marvo takes pride in product quality and has put several measures in place to assure high levels of quality standards. For your peace of mind, all parts have been ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. Redefine convenience and secure priority delivery on all parts along with a comprehensive 12-month warranty. This is the smart new way to buy automation and control components.


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3CP153.9 Product Description

The B&R 3CP153.9 CPU module is a compact and robust control solution designed for a wide range of industrial automation applications. This module is part of the highly regarded B&R 2005 series, known for its reliability and performance in challenging environments.

Featuring 64 kB of SRAM, the 3CP153.9 provides sufficient memory for small to medium-sized applications. Its efficient instruction cycle time ensures swift processing, making it suitable for tasks requiring quick response times. The module also includes a non-volatile real-time clock, maintaining accurate timekeeping even during power outages.

Equipped with a standard RS232 interface and an electrically isolated RS485/RS422/TTY interface, the 3CP153.9 offers versatile communication options. These interfaces enable easy integration into existing systems and support for a variety of industrial communication protocols.

The module's design includes status LEDs for at-a-glance monitoring of system states, a detachable key switch for enhanced security, and a reset button for quick system reboots. Additionally, the cold start button allows for complete system initialisation when needed.

For maintenance purposes, the 3CP153.9's NiCd battery can be replaced to ensure continuous buffering of the RAM, preserving data integrity during power fluctuations. The module's robust construction and operational elements are accessible behind a protective door, safeguarding against accidental adjustments or damage.

Overall, the B&R 3CP153.9 CPU module is a reliable choice for those seeking a durable and efficient control solution for their automation needs. Its combination of memory capacity, communication interfaces, and user-friendly features make it a valuable addition to any industrial control system.

Frequently Asked Questions

What type of CPU module is the 3CP153.9?

The 3CP153.9 is a CPU module designed for use in PLC systems, offering a combination of control, processing, and communication functions.

What are the communication interface options available on this CPU module?

This CPU module comes with a standard RS232 interface and an electrically isolated RS485/RS422/TTY interface, providing versatile options for connecting to various industrial networks.

How is the real-time clock on the CPU module powered?

The real-time clock on the CPU module is powered by a buffering system that includes a gold leaf capacitor, a NiCd battery, and a battery in the APM, ensuring continuous operation even during power interruptions.

Can the NiCd battery be replaced, and if so, how?

Yes, the NiCd battery can be replaced. The process involves turning off the power supply, discharging static energy, opening the module door, and carefully removing and replacing the battery with the correct polarity.

What is the purpose of the cold start button on the CPU module?

The cold start button is used to initiate a cold start, which resets the CPU to its initial state, clears the application RAM, and restarts the operating system and all tasks from scratch.

What does the key switch on the CPU module do?

The key switch on the CPU module has three positions: Run, Program, and Service, which control the ability to load programs, start or stop tasks, and reboot the CPU into service mode, respectively.

How can I monitor the status of the CPU module?

The CPU module is equipped with status LEDs that indicate various operational states such as READY, RUN, FORCE, ERROR, and battery status, as well as communication activity on the interfaces.

What is the maximum baud rate for the RS485/RS422 interface?

The maximum baud rate for the RS485/RS422 interface on the CPU module is 347 kBaud, allowing for high-speed data transmission over the network.

What are the storage temperature limits for the CPU module?

The CPU module can be stored at temperatures ranging from -40°C to +65°C, depending on the duration of storage, with specific limits for long-term storage and shorter periods.

Is there a specific procedure for changing the NiCd rechargeable battery?

Yes, there is a specific procedure for changing the NiCd rechargeable battery which includes ensuring the gold foil capacitor is charged, removing the old battery, and soldering in the new one with the correct polarity.