Product Overview

The 140CPU67160​ is Schneider Electric’s flagship Unity Hot Standby (HSBY) processor for the Modicon Quantum automation platform — a 266 MHz, 1024 kB RAM CPU engineered specifically for mission-critical continuous-process applications where any control interruption translates directly into lost production, safety incidents, or environmental excursions. As a native hot-standby processor, the 140CPU67160​ is never deployed as a single unit; it operates in a synchronized pair where the Primary CPU executes the control logic while the Standby CPU mirrors every scan, connected via a dedicated MT-RJ multimode fiber optic link that constantly exchanges heartbeat, state RAM, and application variables. When the Primary 140CPU67160​ encounters a fault — CPU failure, power supply loss, backplane anomaly, or network card fault — the Standby assumes control in less than one scan cycle, delivering a truly bumpless transfer that prevents any perturbation to the controlled process.Architecturally, the 140CPU67160​ belongs to Schneider Electric’s Unity-generation Quantum processors, programmed exclusively through Unity Pro (now EcoStruxure Control Expert) in full compliance with IEC 61131-3. The module integrates a 266 MHz processor delivering 10.28 Kinstructions/ms of Boolean execution performance, 1024 kB of internal RAM (512 kB allocated to data), and expandable memory of up to 7168 kB for program storage and 8 MB for file storage via PCMCIA card. Onboard connectivity of the 140CPU67160​ includes one multimode Ethernet TCP/IP port, one Modbus Plus (SUB-D 9) interface, one Modbus (RJ45) port, one USB programming port, and the critical MT-RJ fiber optic connector dedicated to hot-standby synchronization between the Primary and Standby processors. This rich integrated communication suite eliminates the need for multiple add-on communication cards in typical Quantum HSBY deployments.The I/O capacity of the 140CPU67160​ is nothing short of massive: it supports 2 local racks (though local I/O is strictly forbidden in certified HSBY configurations — all I/O must reside on remote drops), up to 63 distributed I/O stations across 3 Modbus Plus networks, and up to 31 remote I/O stations per S908, Ethernet Quantum, or Ethernet X80 network. On a single 140CPU67160-controlled HSBY system, the reachable I/O envelope extends to 31,744 discrete inputs and 31,744 discrete outputs remotely, plus 1,984 analog inputs and 1,984 analog outputs remotely. Six optional communication modules — Ethernet, Modbus, Modbus Plus, Profibus DP, or Sy/Max — can be added per CPU, multiplying the connectivity options for complex multi-vendor integration.It is essential for asset managers to recognize the lifecycle status of the 140CPU67160: Schneider Electric formally discontinued commercial sales of this processor on 31 December 2018, with standard manufacturer service (repair, spare parts) ending on 31 December 2026. The officially recommended replacement is the M580 redundant HSBY processor module BMEH584040 (Level 4, Remote). Consequently, the 140CPU67160​ is now available exclusively through specialized industrial automation spare parts suppliers as new-surplus original stock or fully tested refurbished units — making it an absolutely critical procurement item for the thousands of Modicon Quantum HSBY systems still operating in power plants, oil refineries, pipeline compressor stations, water treatment facilities, and chemical processing complexes worldwide. For these installed bases, the 140CPU67160​ is not merely a component; it is the strategic enabler of deferred DCS migration capital expenditure and uninterrupted process continuity.

Technical Specifications