Schneider Electric BMXP342020 Modicon M340 Processor Module — Modbus & Ethernet, Up to 1024 Discrete / 256 Analog I/O, Supplied SD Backup Card (BMXRMS008MP), IP20

The Schneider Electric BMXP342020 is a performance processor module for the Modicon M340 automation platform. It provides Modbus serial and Modbus/TCP Ethernet connectivity, on‑board SD backup memory and high I/O processor capacity for demanding PAC/PLC applications across industrial sectors.

Key specifications

• Manufacturer: Schneider Electric
• Model: BMXP342020 (Modicon M340 processor module)
• Function: Performance CPU/processor for Modicon M340 with Modbus and Ethernet interfaces
• Rack support: Up to 4 racks; supports 11 slots in system configurations
• I/O processor capacity:
  • Discrete I/O: up to 1024 (multi‑rack)
  • Analog I/O: up to 256 (multi‑rack)
• Communication interfaces:
  • Ethernet: RJ45 10BASE‑T / 100BASE‑TX (Ethernet TCP/IP)
  • Serial: RJ45 non‑isolated character mode (RS232C / RS485), Modbus RTU/ASCII master/slave over RJ45
  • USB: mini‑B USB port at 12 Mbit/s for programming terminal
• Modbus capabilities:
  • Modbus TCP messaging over Ethernet
  • Modbus RTU/ASCII over serial RJ45 (supports master/slave; up to 252 data bytes per RTU request)
  • Diagnostic and event counters for Modbus
• Memory & storage:
  • Supplied SD flash memory card (BMXRMS008MP) for backup of programs, constants, symbols and data; automatic duplication on power‑down and transparent restore on power‑up
  • Internal RAM: 4096 kB total (3584 kB for program/constants/symbols; 256 kB data)
  • SD card also activates the standard web server (class B10)
• Performance & architecture:
  • Application structure: 1 cyclic/periodic master task, 1 periodic fast task, up to 64 event tasks
  • Execution times: 0.12 µs Boolean; 0.25 µs single‑length words; 1.16 µs floating point
  • Instruction throughput examples: up to 8.1 Kinst/ms (100% Boolean)
• Local signalling & controls:
  • LEDs: ETH ACT (green), RUN (green), ETH STS (green), ETH 100 (green), I/O (red), CARD ERR (red), ERR (red), SER COM (yellow) activity on Modbus
  • Front panel security screw and 8‑LED display block; RESET and diagnostic functions as per manual
• Supply & consumption:
  • Internal power via M340 rack
  • Current consumption: 95 mA at 24 V DC
• Mechanical & environmental:
  • Module format: standard M340
  • Net weight: 0.205 kg
  • Operating ambient temperature: 0…60 °C
  • Relative humidity: 5…95 % without condensation
  • IP degree of protection: IP20
• Certifications & standards:
  • CE, UL, CSA, RCM, EAC, UKCA, China RoHS, WEEE
  • Compliant with IEC/EN standards including IEC 61131‑2, IEC 61010‑2‑201 and IEC 61000 series; hazardous location approvals per regional listings (see datasheet)
• Packaging & warranty:
  • Packaging dimensions and weights per Schneider Electric data
  • Contractual warranty: 18 months

Features & benefits

• Native Modbus serial and Modbus/TCP Ethernet support for broad compatibility with existing field devices and networks.
• Supplied SD backup card (BMXRMS008MP) ensures automatic program/data backup and transparent restoration after power loss.
• High I/O processor capacity (up to 1024 discrete / 256 analog) suits medium to large distributed control systems.
• Compact M340 form factor with USB programming port simplifies engineering and onsite maintenance.
• Comprehensive diagnostic LEDs and Modbus counters ease commissioning and troubleshooting.

Applications

• Machine control, process automation, water/wastewater, renewable energy, cement, manufacturing and infrastructure projects requiring Modbus/ Ethernet integration and reliable program backup.

Installation and service notes

• Install in a Modicon M340 rack and ensure rack power meets specifications. Power is provided via the rack—do not apply module direct supply.
• Use the supplied SD card (BMXRMS008MP) for backup; replace only with the specified part number if necessary.
• For serial Modbus links, observe cable types and distance limits for RS232/RS485 as specified in the datasheet.
• Install in an appropriate enclosure (IP20 rating) and respect ambient/humidity limits and hazardous location instructions if applicable.
• Keep firmware up to date (latest M340 firmware available; e.g., SV03.65) and consult Schneider Electric documentation for configuration and programming guidance.