{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"140CPU43412U","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"140CPU43412U","canonicalUrl":"https://aoctrl.com/schneider/140CPU43412U","factsUrl":"https://aoctrl.com/api/mcp/products/140CPU43412U","rawCanonicalId":null},"summary":{"shortDescription":"Schneider 140CPU43412U Plc Expansion Modules — now discontinued, supplied from remaining surplus and broker stock.","salesMarkdown":"## Overview The 140CPU43412U is a Modicon Quantum Unity processor from Schneider Electric, built for process control with 1056 kB of internal RAM and a Boolean execution rate of 1.86 Kinst/ms at 100 % Boolean. It carries two Modbus ports and one Modbus Plus port, and supports up to 31744 discrete inputs and outputs remote. Schneider discontinued the 140CPU43412U on 2018-12-31. An RFQ confirms available quantity and lead time for line-down or last-time-buy needs. Compared to the 140CPU67861, the 140CPU43412U has 1056 kB internal RAM versus 11264 kB on the 140CPU67861, and supports unlimited local I/O slots versus none on the 140CPU67861. The 140CPU67861 also adds Ethernet remote I/O and PCMCIA file storage, making it the higher-memory, network-expandable choice for larger applications.","metaTitle":"Schneider 140CPU43412U Modicon Quantum Unity processor (discontinued)","metaDescription":"Schneider 140CPU43412U Modicon Quantum Unity processor: 1056 kB RAM, 1.86 Kinst/ms Boolean, 2 Modbus ports, discontinued since 2018-12-31. Sourced via surplus.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":[],"specifications":{"Checks":"Process control","Category":"18150-QUANTUM CONTROLLERS,HSBY,COMM.","Standards":"HazLoc","Clock frequency":"66 MHz","Number of racks":"2 - local","Number of slots":"2 4 10 16 6","Switch Function":"Key switch memory start/stop memory protection Slide switch communication port : ASCII/RTU/Memory","System overhead":"0.2 ms fast task 1 ms master task","lifecycle_stage":"eol_hot","Local signalling":"1 LED (green) for communications are active on the Modbus Plus port (Modbus Plus) 1 LED (green) for communications are active on the Modbus port (Modbus) 1 LED (green) for CPU has been started and is solving logic (RUN) 1 LED (green) for CPU has passed the power-up diagnostic tests (READY) 1 LED (orange) for write-protected memory (memory port) 1 LED (red) for battery needs replacing or is not present (BAT LOW) 1 LED (red) for communications error on the Modbus Plus port (ERROR A)","Range of Product":"Modicon Quantum automation platform","Memory description":"Internal RAM 1056 kB","Analogue I/O number":"500 inputs, 500 outputs - distributed - per network Modbus Plus 1984 inputs,1984 outputs - S908 remote I/O Unlimited (26 slots max) - local","Discrete I/O number":"31744 inputs, 31744 outputs - remote 8000 inputs, 8000 outputs - distributed - per network Modbus Plus Unlimited (26 slots max) - local","Application structure":"1 cyclic/periodic master task - 1 periodic fast task - 16 timer interrupt tasks - 64 I/O interrupt tasks - 64 interrupt tasks - No auxiliary task -","Electrical connection":"1 female connector SUB-D 9 for connecting to the Modbus Plus network 2 female connectors SUB-D 9 for connecting to the Modbus bus","Nbr. of units in pkg.":"1","Bus current requirement":"1800 mA","Application specific I/O":"Serial link Counter High-speed interrupt inputs Accurate time stamping","Product or Component Type":"Unity processor","Integrated connection type":"1 Modbus Plus 2 Modbus","Number of optional modules":"6 Ethernet, Modbus, Modbus Plus, Profibus DP, Sy/Max)","Number of remote I/O station":"31 - 2 S908 remote I/O 0 - 0 ethernet remote I/O","Maximum number of connections":"2 AS-Interface - distributed 2 Modbus RS232/485 Modbus/ASCII) 4 AS-Interface - remote 6 Ethernet TCP/IP - local 6 Modbus Plus - local 6 Profibus DP - local","Number of instructions per ms":"1.86 Kinst/ms 100 % Boolean 2.49 Kinst/ms 65 % Boolean and 35 % numerical","Execution time per instruction":"0.1...0.27 µs floating points 0.1...0.27 µs on fixed-point arithmetic 0.12...0.585 µs Boolean 0.12...0.585 µs on word","Number of distributed I/O station":"63 1 3 Modbus Plus"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4,064.00 – $6,885.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6891fb44880557061b2006d9bd094eb0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/140CPU43412U/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/140CPU43412U","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/140CPU43412U 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}}