Schneider Electric BMXP342020 M340 Processor Module

BMXP342020 Modicon M340 processor module: what it is and how the code reads

The BMXP342020 is a Schneider Electric product described in the datasheet as: processor module M340, max 1024 discrete and 256 analog I/O, Modbus, Ethernet. The BMXP342020 is a Modicon M340 processor module that runs the application program on a rack of the M340 / X80 platform and provides Modbus and Ethernet connectivity. Seven Star LLC supplies the BMXP342020 in Oman and the GCC as an independent supplier based in Muscat.

Decoding the reference: BMX is the Modicon M340 / X80 hardware family, P34 the processor module series, and the digits after it (42020) the model with Ethernet and Modbus ports, which the datasheet title summarises as processor module M340, max 1024 discrete and 256 analog I/O, Modbus, Ethernet.

Technical specifications of the BMXP342020

How the BMXP342020 processes the program

The processor executes the program in a cyclic master task plus fast and event tasks. The datasheet lists a Boolean instruction time of 0.12 µs Boolean; 0.17 µs double-length words and a master-task overhead as stated in the datasheet. Program, constants and symbols can be backed up to the supplied memory card.

Capacity is stated as 1024 I/O for discrete I/O and 256 I/O for analogue I/O on up to 4 racks, with up to 36 application-specific channels.

Where the BMXP342020 fits in an X80 rack

The processor sits in the first slot positions of an X80 rack next to a power supply module such as BMXCPS2000 and I/O modules such as BMXDDI1602 (16-channel discrete input). The rack backplane carries power and bus signals to all modules.

Embedded communications include the serial link and Ethernet TCP/IP; the datasheet states Modbus TCP messaging and bandwidth management among the services. For more network capacity add Ethernet or AS-Interface communication modules, up to the numbers in the datasheet.

Selection and ordering checklist for the BMXP342020

• I/O count: compare required discrete and analogue points with 1024 I/O and 256 I/O.
• Rack count and backplane type must match the platform you are extending.
• Memory: the application size and object areas must fit the processor; the datasheet lists the object area sizes.
• Network: check Ethernet services and connections needed.
• Programming software version and memory card: confirm compatibility with the project.
• Spares: decide whether to hold a spare processor for fast replacement.

Installation, commissioning and maintenance of the BMXP342020

Fit the module into the dedicated processor slot of the rack, secure it, and connect the Ethernet and serial cables. The BMXP342020 weighs 0.205 kg and draws 95 mA 24 V DC from the rack supply, so check the rack power budget. Use the programming software to assign an IP address and download the program; keep the project and a memory-card backup stored separately.

During service, watch the front LEDs for run, error and I/O status and use the diagnostic counters of the Modbus services. Replace the module with the same reference where possible; a processor swap should be followed by a restore from the memory card and a functional test.

Typical applications of the BMXP342020 in Oman and the GCC

M340 processors like the BMXP342020 run utilities, water and wastewater plants, desalination auxiliaries, oil and gas package units and building systems in Oman and the GCC. Place the rack in a cooled, clean panel; the datasheet gives an operating range of 0 to 60 °C.

Backup, spares and replacement planning for the BMXP342020

A processor is the heart of the rack, so plan its replacement before it fails. Keep the latest project file, the memory-card backup and a note of the firmware level used on site. A replacement of the same reference can normally be loaded from the memory card, but always check the firmware compatibility with the programming software and with communication modules in the same rack. In remote or offshore locations a spare processor on the shelf shortens an outage from days to hours.

When refurbishing an older rack, record the module order, the I/O addresses and any special configuration so that the replacement behaves exactly as the original did.

Information to send with an RFQ for the BMXP342020

• Full reference BMXP342020 and quantity
• Existing rack and power supply type
• I/O count and communication needs
• Programming software version
• Delivery location and timing

Documents and quotation

A datasheet for this product is attached on this page. It lists the electrical, mechanical and environmental data summarised above.

Send us the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and does not represent itself as an official channel of the manufacturer.