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Schneider Electric 140CPU43412U

Schneider 140CPU43412U Modicon Quantum Unity processor (discontinued)

MPN140CPU43412U
End of Life

Schneider 140CPU43412U Plc Expansion Modules — now discontinued, supplied from remaining surplus and broker stock.

$4,064.00 – $6,885.00Ref. price · indicative, final on quote
Schneider Electric 140CPU43412U datasheet (PDF)
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MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

140CPU43412U key specifications
ParameterValue
Range of productModicon Quantum automation platform
Product or component typeUnity processor
Integrated connection type1 Modbus Plus 2 Modbus
Bus current requirement1800 mA
Clock frequency66 MHz
Electrical connection1 female connector SUB-D 9 for connecting to the Modbus Plus network 2 female connectors SUB-D 9 for connecting to the Modbus bus
Maximum number of connections2 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
StandardsHazLoc
ChecksProcess control
Category18150-QUANTUM CONTROLLERS,HSBY,COMM.
Number of racks2 - local
Number of slots2 4 10 16 6

All specifications

140CPU43412U additional specifications
ParameterValue
Switch functionKey switch memory start/stop memory protection Slide switch communication port : ASCII/RTU/Memory
System overhead0.2 ms fast task 1 ms master task
Local signalling1 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)
Memory descriptionInternal 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 structure1 cyclic/periodic master task - 1 periodic fast task - 16 timer interrupt tasks - 64 I/O interrupt tasks - 64 interrupt tasks - No auxiliary task -
Application specific i (O)Serial link Counter High-speed interrupt inputs Accurate time stamping
Number of optional modules6 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
Number of instructions per1.86 Kinst/ms 100 % Boolean 2.49 Kinst/ms 65 % Boolean and 35 % numerical
Execution time per instruction0.1...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

Product details

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.

MPN
140CPU43412U