Schneider Electric Modicon M340 BMX Modules BMXPRA0100

Technical Dossier

Product Details And Specifications

Schneider Electric Modicon M340 BMX Series Technical Notes

The Schneider Electric Modicon M340 platform, identified by the BMX prefix, is a mid-range programmable automation controller (PAC) deployed across heavy industrial sectors including petrochemical refining, nuclear auxiliary systems, offshore oil & gas processing, water treatment infrastructure, and continuous-process manufacturing. Its modular backplane architecture supports deterministic Ethernet-based control via Modbus TCP and CANopen, making it a standard reference platform in IEC 61131-3 compliant automation environments. The M340 rack system accommodates up to 12 I/O slots per local rack and supports distributed I/O expansion through dedicated remote adapter modules such as the BMXPRA0100.

The Evolution of Modicon M340 BMX Architecture

The Modicon M340 platform was introduced in the mid-2000s as a successor to the Modicon Quantum (140-prefix) and Modicon Premium (TSX-prefix) families, targeting applications requiring a compact form factor with enterprise-grade network integration. Early BMX releases centered on standalone CPU modules with integrated Ethernet ports (BMXP341000, BMXP342000). Subsequent generations added dual-port Ethernet switches embedded in the CPU (BMXP3420302, BMXP3420302H), enabling Device Level Ring (DLR) and daisy-chain topologies without external switches.

The distributed I/O architecture evolved in parallel: the BMXPRA0100 remote I/O adapter introduced CANopen-based peripheral expansion, allowing remote racks to be placed up to 100 meters from the local rack. Later, Ethernet-based remote I/O adapters (BMXNOE0100, BMXNOE0110) extended this to Modbus TCP/IP networks. The platform reached commercial maturity around 2015 and entered a maintenance/extended lifecycle phase. Schneider Electric has positioned the Modicon M580 (BMENOC, BMEP, BMEH prefix) as the strategic successor, though M340 installations remain active across tens of thousands of global sites with long-term spare parts demand extending well beyond 2030.

Modicon M340 BMX Full Catalog & Functionalities (SKU List)

CPU / Controller Modules

• BMXP341000: M340 CPU, 256 KB application memory, single Ethernet port, CANopen master
• BMXP342000: M340 CPU, 512 KB application memory, dual Ethernet, CANopen master
• BMXP3420102: M340 CPU, 1 MB memory, integrated Modbus TCP, redundancy-ready
• BMXP3420302: M340 CPU, 4 MB memory, dual-port Ethernet switch, DLR topology support
• BMXP3420302H: M340 CPU, conformal-coated variant for harsh environments, dual-port Ethernet

Remote I/O & Communication Adapter Modules

• BMXPRA0100: Peripheral remote I/O adapter, CANopen interface, connects remote BMX racks to local CPU rack
• BMXNOE0100: Ethernet communication module, Modbus TCP server/client, 10/100 Mbps
• BMXNOE0110: Ethernet module with embedded web server, FTP, SNMP, and Modbus TCP
• BMXNRP0200: Fiber optic repeater module for extended remote I/O distance
• BMXNRP0201: Fiber optic repeater, multimode, SC connector variant

Digital Input (DI) Modules

• BMXDDI1602: 16-channel 24 VDC digital input module, sink/source compatible
• BMXDDI3202K: 32-channel 24 VDC digital input, high-density, spring-clamp terminal
• BMXDAI1602: 16-channel 100–120 VAC digital input module

Digital Output (DO) Modules

• BMXDDO1602: 16-channel 24 VDC transistor output, 0.5 A per channel
• BMXDRA0805: 8-channel relay output module, 5 A per channel, 24–240 VAC/VDC

Analog Input (AI) Modules

• BMXAMI0410: 4-channel analog input, ±10 V / 0–20 mA / 4–20 mA, 12-bit resolution
• BMXAMI0800: 8-channel analog input, voltage/current configurable per channel

Analog Output (AO) Modules

• BMXAMO0210: 2-channel analog output, ±10 V / 0–20 mA, 12-bit resolution
• BMXAMO0410: 4-channel analog output, voltage and current configurable

Power Supply Modules

• BMXCPS2000: 100–240 VAC / 125 VDC power supply, 20 W, for 4- and 8-slot racks
• BMXCPS3500: 100–240 VAC power supply, 35 W, for 12-slot racks
• BMXCPS3540T: 24–48 VDC power supply, 35 W, extended temperature range

Sourcing Hard-to-Find & Obsolete Modicon M340 BMX Parts

As the Modicon M340 platform transitions from active production to extended lifecycle support, procurement of specific BMX modules — particularly early-generation CPUs (BMXP341000, BMXP342000), remote I/O adapters (BMXPRA0100), and legacy communication modules — becomes progressively constrained through standard distribution channels. DriveKNMS maintains a dedicated inventory of new-surplus, refurbished, and tested-serviceable BMX modules sourced from decommissioned plant assets, authorized liquidation, and global broker networks.

Quality Control for the Modicon M340 BMX Range

BMX modules present specific test challenges due to their integrated CANopen backplane bus, dual-port Ethernet switching fabric (in later CPU variants), and firmware-version dependencies between CPU and I/O modules. DriveKNMS applies a structured validation protocol to all BMX inventory prior to dispatch:

• Backplane bus integrity test: Each module is seated in a reference M340 rack and polled via Unity Pro / EcoStruxure Machine Expert to confirm correct rack addressing and module identification.
• Firmware version audit: CPU modules are checked for firmware compatibility with the customer's Unity Pro version. Downgrade or upgrade paths are documented prior to shipment.
• I/O channel functional test: All analog and digital channels are exercised at rated voltage/current levels. AI modules are verified against calibration reference signals; AO modules are load-tested.
• Communication adapter validation: BMXPRA0100 and Ethernet modules (BMXNOE series) are tested for correct CANopen node enumeration and Modbus TCP register response under simulated network load.
• Visual and mechanical inspection: Connector pins, backplane edge connectors, and conformal coating (where applicable) are inspected under magnification. Modules with physical damage to bus connectors are rejected.