{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BMXP342000","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"BMXP342000","canonicalUrl":"https://aoctrl.com/schneider/BMXP342000","factsUrl":"https://aoctrl.com/api/mcp/products/BMXP342000","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric, Modicon M340 automation platform, processor module, BMXP342000, internal power supply via rack, Modbus master/slave, 1024 discrete + 256 analog I/O.","salesMarkdown":"## What it is on the rack The Schneider BMXP342000 is a processor module for the Modicon M340 automation platform — the standard-performance Modbus-capable CPU slot for a BMXRack-style chassis, fed by internal power supply via the rack backplane rather than a separate 24 V feed. Capacity is 1024 discrete I/O plus 256 analog I/O, spread across up to 4 racks, with a 36-channel application-specific allotment and headroom for 2 Ethernet communication modules or 4 AS-Interface modules alongside the processor. IP20 footprint, TC conformal coating, and lifecycle status current are the values on record. ## Modbus and serial on the front face Four physical interfaces sit on the processor: an RS-232C character-mode port (RJ45, 2 twisted shielded pairs, full duplex), an RS-485 character-mode port (RJ45, 1 twisted shielded pair, half duplex), a Modbus master/slave port on RS-232C, and a Modbus master/slave port on RS-485, each Modbus segment tunable 0.3...19.2 kbit/s. A USB 12 Mbit/s port is also exposed on the face. Modbus framing covers both RTU (1 CRC per frame) and ASCII (1 LRC per frame), with the same LRC pair also available in plain character mode. Per-request payload is 252 data bytes in RTU, 504 in ASCII, and 1 K data byte in plain character mode; address span 0...248 in either mode. Bus length is class-of-isolation, not just baud: non-isolated segments run 0...10 m, isolated segments run 0...1000 m, and a point-to-point link stays under 15 m. Tap links on an isolated Modbus segment are capped below 40 m. 0...32 devices share a segment in either mode. Diagnostic counters and Modbus event counters are exposed on the module, and the front-panel LED set covers RUN, I/O fault, CARD ERR, ERR, and a yellow SER COM activity light on the Modbus port. ## Program, scan, and task structure Memory layout is 4096 kB internal RAM split as 256 kB data plus 3584 kB program/constants/symbols, with a BMXRMS008MP memory card handling program, constant, symbol, and data backup. Default object areas are 1024 %MWi internal words, 256 %KWi constant words, and 512 %Mi located internal bits; the maxima climb to 32634 %Mi, 32464 %MWi, and 32760 %KWi. Throughput is rated 4.2 Kinst/ms at a 65 % Boolean / 35 % fixed-arithmetic mix, or 5.4 Kinst/ms at 100 % Boolean. Per-instruction execution lands at 0.18 µs Boolean, 0.38 µs single-length words, 0.26 µs double-length words, and 1.74 µs floating point. System overhead is 0.2 ms on the fast task and 1.05 ms on the master task. Scheduling is 1 cyclic/periodic master task, 1 periodic fast task, no auxiliary task, and 32 event tasks — enough headroom for typical line control without dragging in a high-end CPU. ## Power, environment, and panel-side handling The processor draws 72 mA at 24 V DC from the rack. Operating ambient is 0...60 °C, with 5...95 % relative humidity non-condensing. Conformal coating (TC) and the IP20 enclosure rating suit standard cabinet mounting; the module expects to be seated in a controlled panel, not a washdown field enclosure. ## Markings, directives, and the decl pack Markings carried on the product are CE, UL, CSA, RCM, EAC, UKCA, China RoHS, WEEE, and IEC, and the directives listed are 2014/35/EU (low voltage), 2014/30/EU (EMC), and 2012/19/EU (WEEE). Standards on the data sheet line up with IEC 61131-2, IEC 61010-2-201, UL 61010-2-201, CSA C22.2 No 61010-2-201, IACS, and the EMC clauses EN/IEC 61000-6-5 (interface type 1 and type 2) and EN/IEC 61850-3 location G. That set is what shows up on the declaration of conformity and is the basis for site acceptance in industrial and substation-adjacent cabinets.","metaTitle":"Schneider BMXP342000 Modicon M340 CPU, 1024 discrete I/O","metaDescription":"Schneider BMXP342000 Modicon M340 processor module: 1024 discrete + 256 analog I/O, Modbus master/slave on RJ45, 24 V DC at 72 mA, lifecycle current.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":[],"specifications":{"Supply":"Internal power supply via rack","Concept":"Modbus","Marking":"CE UL CSA RCM EAC UKCA China RoHS WEEE IEC","Category":"US1PC3418160","Requests":"1 K data bytes per request character mode 252 data bytes per RTU request Modbus 504 data bytes per ASCII request Modbus","Standards":"IEC 61131-2 IEC 61010-2-201 UL 61010-2-201 CSA C22.2 No 61010-2-201 IACS E10 EN/IEC 61000-6-5, interface type 1 and type 2 EN/IEC 61850-3, location G","Bus length":"0...32.8 ft (0...10 m) serial link non isolated character mode segment 0...32.8 ft (0...10 m) serial link non isolated Modbus segment 0...3280.8 ft (0...1000 m) serial link isolated character mode segment 0...3280.8 ft (0...1000 m) serial link isolated Modbus segment 0...49.2 ft (0...15 m) character mode point-to-point 0...49.2 ft (0...15 m) Modbus point-to-point","Directives":"2014/35/EU - low voltage directive 2014/30/EU - electromagnetic compatibility 2012/19/EU - WEEE directive","Monitoring":"Diagnostic counters Modbus Event counters Modbus","Status LED":"1 LED (Green) processor running (RUN) 1 LED (Red) I/O module fault (I/O) 1 LED (Red) memory card fault (CARD ERR) 1 LED (Red) processor or system fault (ERR) 1 LED (Yellow) activity on Modbus (SER COM)","Number of racks":"4","System overhead":"0.2 ms fast task 1.05 ms master task","lifecycle_stage":"current","Control channels":"Programmable loops","Range of Product":"Modicon M340 automation platform","Control parameter":"One CRC on each frame (RTU) Modbus One LRC on each frame (ASCII) character mode One LRC on each frame (ASCII) Modbus","Number of devices":"2 point-to-point character mode 2 point-to-point Modbus","Relative Humidity":"5...95 % without condensation","Memory description":"Internal RAM 4096 kB Internal RAM 256 kB data Internal RAM 3584 kB program constants and symbols Supplied memory card (BMXRMS008MP) backup of programs, constants, symbols and data","Current consumption":"72 mA 24 V DC","Number of addresses":"0...248 character mode 0...248 Modbus","Protective treatment":"TC","Application structure":"1 cyclic/periodic master task 1 periodic fast task No auxiliary task 32 event tasks","Nbr. of units in pkg.":"1","IP Degree of Protection":"IP20","Maximum tap links length":"<131.2 ft (40 m) serial link isolated Modbus segment","Product or Component Type":"Processor module","Integrated connection type":"Non isolated serial link RJ45 character mode asynchronous in baseband, RS232C 2 twisted shielded pairs 0.3...19.2 kbit/s full duplex Non isolated serial link RJ45 character mode asynchronous in baseband, RS485 1 twisted shielded pair 0.3...19.2 kbit/s half duplex Non isolated serial link RJ45, master/slave Modbus, RTU/ASCII asynchronous in baseband, RS232C 1 twisted shielded pair 0.3...19.2 kbit/s half duplex Non isolated serial link RJ45, master/slave Modbus, RTU/ASCII asynchronous in baseband, RS485 1 twisted shielded pair 0.3...19.2 kbit/s half duplex USB port 12 Mbit/s","Default size of object areas":"1024 %MWi internal words located internal data 256 %KWi constant words located internal bits 512 %Mi located internal data","Maximum size of object areas":"32634 %Mi located internal bits 32464 %MWi internal words located internal data 32760 %KWi constant words located internal data","Number of devices per segment":"0...32character mode) 0...32Modbus)","Number of instructions per ms":"4.2 Kinst/ms 65 % Boolean + 35 % fixed arithmetic 5.4 Kinst/ms 100 % Boolean","Execution time per instruction":"0.18 µs Boolean 0.26 µs double-length words 0.38 µs single-length words 1.74 µs floating points","Analogue I/O processor capacity":"256 I/O","Ambient Air Temperature for Operation":"32...140 °F (0...60 °C)","Number of application specific channel":"36","Communication module processor capacity":"2 Ethernet communication module 4 AS-Interface module","Local I/O processor capacity (discrete)":"1024 I/O"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$344.41 – $741.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4b1857c02cabc5feb829cdb2760e3b01.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/BMXP342000/alternatives.json"},"ai":{"faq":[{"question":"What is the listed communication concept on the BMXP342000?","answer":"Modbus, with RTU and ASCII framing available on the front-panel RS-232C and RS-485 RJ45 ports and a 12 Mbit/s USB port alongside."},{"question":"What compliance documentation is on file for the BMXP342000?","answer":"Markings carried on the product are CE, UL, CSA, RCM, EAC, UKCA, China RoHS, WEEE, and IEC, against 2014/35/EU (low voltage), 2014/30/EU (EMC), and 2012/19/EU (WEEE), with IEC 61131-2, IEC 61010-2-201, UL 61010-2-201, CSA C22.2 No 61010-2-201, IACS, EN/IEC 61000-6-5 (interface type 1 and type 2), and EN/IEC 61850-3 location G as the standards basis."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/BMXP342000","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/BMXP342000 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:21:01.794Z","lastPublished":"2026-09-02T08:21:01.794Z","indexable":true}}