The Schneider 140CPU43412UC is a Unity processor for the Modicon Quantum automation platform, rated for process control tasks with HazLoc approval. It runs at 66 MHz with 1056 kB of internal RAM, and supports up to 31744 discrete I/O and 500 analog I/O in distributed configurations. This part is obsolete per the manufacturer; availability is through surplus channels only.
Schneider 140CPU43412UC Unity CPU, 1056 kB, Obsolete
MPN140CPU43412UC
Obsolete
Schneider Electric Modicon Quantum Unity processor, 140CPU43412UC, 1056 kB memory, 66 MHz, conformal coated, HazLoc.
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
How we verify every order →Specifications
| Parameter | Value |
|---|---|
| Range of product | Modicon Quantum automation platform |
| Product or component type | Unity processor |
| Integrated connection type | 1 Modbus Plus 2 Modbus |
| Bus current requirement | 1800 mA |
| Clock frequency | 66 MHz |
| 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 |
| 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 |
| Standards | HazLoc |
| Checks | Process control |
| Category | 18150-QUANTUM CONTROLLERS,HSBY,COMM. |
| Number of racks | 2 - local |
| Number of slots | 16 6 4 10 2 |
All specifications
| Parameter | Value |
|---|---|
| Switch function | Slide switch communication port : ASCII/RTU/Memory Key switch memory start/stop memory protection |
| System overhead | 0.2 ms fast task 1 ms master task |
| 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) |
| 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 |
| Protective treatment | Conformal coating Humiseal 1A33 |
| 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 - |
| Application specific i (O) | High-speed interrupt inputs Counter Accurate time stamping Serial link |
| 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 |
| Number of instructions per | 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 |
Product details
Frequently asked questions
What are the key specifications of 140CPU43412UC?
Unity processor for Modicon Quantum platform, 66 MHz clock, 1056 kB RAM, supports up to 31744 discrete I/O and 500 analog I/O, HazLoc rated, conformal coated.
How can I source the 140CPU43412UC?
This obsolete part is available through specialist surplus channels. Submit an RFQ with your required quantity; we will verify stock and lead time.
MPN
140CPU43412UC