Can 140CPU43412 use the same flash executive as 140CPU43412A?

No. The A and non-A executives are not interchangeable. In hot standby, pair two non-A CPUs or two A CPUs rather than mixing them.

Which 140CPU43412 Modbus port can be connected to a modem?

Port 1 provides full modem interfacing. Port 2 supports normal RTS/CTS serial communication but not modem operation.

Why does the 140CPU43412 Modbus Plus indicator stay on after changing the rear switches?

An address of zero or a value above 64 is invalid and produces a steady Modbus Plus indication. The upper switch sets tens and the lower switch sets units; use a valid unique node from 1 to 64.

What changes when the 140CPU43412 communication selector moves between ASCII and RTU?

The fixed ASCII position uses 2400 baud, even parity, seven data bits and one stop bit. Fixed RTU uses 9600 baud, even parity, eight data bits and one stop bit. The bottom position permits software-defined settings.

Does the 140CPU43412 Mem Prt key position stop a running controller?

It prevents programmer changes without changing the current run state. The Stop position stops the controller; the Start position permits programmer changes and programmer start/stop commands.

What expansion is required for a second local rack on 140CPU43412?

The supported two-rack local configuration requires an expander. Local I/O allocation remains limited to 64 input words and 64 output words, with discrete and register I/O consuming that allocation.

How should 140CPU43412 distributed-I/O capacity be checked?

Three DIO networks require two 140NOM21x00 option modules. Each network allows 500 input and 500 output words; each node allows 30 input and 32 output words, and drop overhead must be included.

Which diagnostic indications distinguish start-up from execution on 140CPU43412?

Ready means power-up diagnostics have passed; Run means logic is being solved. Bat Low identifies a missing or depleted battery, while Error A identifies a Modbus Plus communication error.

140CPU43412 Quantum CPU | Schneider Electric

Name: 140CPU43412
Brand: Schneider Electric
SKU: 140CPU43412

140CPU43412

CPU Module

In Stock

Ships by Sunday, October 18

Fast Shipping Available

Technical specifications for 140CPU43412

Manufacturer:

Schneider Electric

Product Category:

PLC Systems

Spare Part Number:

140CPU43412

Estimated shipping dimensions:

4x10.5x25cm

Weight:

0.58 kg

Tariff Code:

8537101190

Counliy of origin:

FRANCE

SRAM capacity:

2 MB

Maximum IEC program:

896 k

984 ladder-logic capacity:

64 k words

Discrete reference capacity:

64 k, any mix

57 k

Extended register capacity:

96 k

Modbus serial ports:

2, RS-232, 9-pin D-shell

Modbus Plus ports:

1, RS-485, 9-pin D-shell

Local I/O capacity:

64 input words and 64 output words

Maximum local racks:

2, requires expander

Maximum remote drops:

Remote I/O capacity per drop:

64 input words and 64 output words

Maximum DIO networks:

3, requires two 140NOM21x00 modules

DIO capacity per network:

500 input words and 500 output words

DIO capacity per node:

30 input words and 32 output words

Option-module interfaces:

Up to 6; only 2 Modbus Plus modules with full DIO functionality

Watchdog timer:

250 ms, software-adjustable

Logic solve time:

0.1-0.5 ms/k

Battery type:

3 V lithium, 1200 mAh

Operating temperature:

0-60 degrees C

TOD clock accuracy:

+/-8 seconds/day at 0-60 degrees C

Fixed ASCII setting:

2400 baud, even parity, 7 data bits, 1 stop bit

Fixed RTU setting:

9600 baud, even parity, 8 data bits, 1 stop bit

Rear-switch node range:

1-64

Software Modbus address range:

1-247

Modem-capable serial interface:

Modbus port 1; port 2 does not support modems

Information

Overview Manuals Common Applications Product Precautions

Schneider Electric 140CPU43412 executes the Quantum control application and connects the CPU to its configured I/O and communication services. Its non-A hardware and executive identity must remain explicit during service or migration.

Coordinates the configured local and remote I/O image.
Supports distributed I/O through the documented Modbus Plus architecture.
Separates serial Modbus communication from the Modbus Plus network.
Provides front-panel diagnostics and memory-protection controls.

Use the recorded rack configuration, I/O map and communication settings as the integration baseline. After replacement, confirm the application, processor state and each configured communication path before releasing the process.

Important Notice: 140CPU43412 and 140CPU43412A require different flash executives; hot-standby pairs must use matching A or non-A CPU identities.

Schneider Electric 140CPU43412 Manuals & Downloads

Schneider Electric 140CPU43412 Technical Reference (PDF)Schneider Electric 140CPU43412 Installation & Commissioning Guide (PDF)

The technical reference separates CPU resources, interfaces and diagnostic states; the installation guide covers switch setup, application restoration, communication checks and controlled start-up.

Quantum control executionRuns the installed control logic and coordinates the configured local I/O image.

Remote-drop coordinationSupports the documented Quantum remote-I/O architecture through the configured RIO head interface.

Modbus-connected equipmentExchanges serial data using the selected ASCII, RTU or software-defined communication settings.

Distributed I/O integrationUses the Modbus Plus architecture and the required option modules for the configured DIO networks.

Read the Quantum hardware instructions before work. Verify 140CPU43412, the non-A executive, rack configuration, communication switches and the approved process maintenance state.

Keep the exact non-A CPU identity; do not load a 140CPU43412A flash executive.

For hot standby, use two matching non-A CPUs or two matching A CPUs, never one of each.

Set the key switch and memory-protection controls for the authorized maintenance operation.

Retain the rear rotary-switch address within 1-64; zero or values above 64 are invalid for Modbus Plus.

Match the front communication switch to the actual serial client; fixed ASCII and RTU modes use different baud and data-bit settings.

Connect modem equipment to Modbus port 1; port 2 does not provide full modem support.

Respect I/O-word allocations and the required expander or option modules; do not infer capacity from the connector count.

Confirm Ready, Run, memory protection and communication indications before returning the restored controller to service.

FAQS

Can 140CPU43412 use the same flash executive as 140CPU43412A?

No. The A and non-A executives are not interchangeable. In hot standby, pair two non-A CPUs or two A CPUs rather than mixing them.
Which 140CPU43412 Modbus port can be connected to a modem?

Port 1 provides full modem interfacing. Port 2 supports normal RTS/CTS serial communication but not modem operation.
Why does the 140CPU43412 Modbus Plus indicator stay on after changing the rear switches?

An address of zero or a value above 64 is invalid and produces a steady Modbus Plus indication. The upper switch sets tens and the lower switch sets units; use a valid unique node from 1 to 64.
What changes when the 140CPU43412 communication selector moves between ASCII and RTU?

The fixed ASCII position uses 2400 baud, even parity, seven data bits and one stop bit. Fixed RTU uses 9600 baud, even parity, eight data bits and one stop bit. The bottom position permits software-defined settings.
Does the 140CPU43412 Mem Prt key position stop a running controller?

It prevents programmer changes without changing the current run state. The Stop position stops the controller; the Start position permits programmer changes and programmer start/stop commands.
What expansion is required for a second local rack on 140CPU43412?

The supported two-rack local configuration requires an expander. Local I/O allocation remains limited to 64 input words and 64 output words, with discrete and register I/O consuming that allocation.
How should 140CPU43412 distributed-I/O capacity be checked?

Three DIO networks require two 140NOM21x00 option modules. Each network allows 500 input and 500 output words; each node allows 30 input and 32 output words, and drop overhead must be included.
Which diagnostic indications distinguish start-up from execution on 140CPU43412?

Ready means power-up diagnostics have passed; Run means logic is being solved. Bat Low identifies a missing or depleted battery, while Error A identifies a Modbus Plus communication error.

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140CPU43412

Product Describe：

Ask our team:

Warranty Policy

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Technical specifications for 140CPU43412

Technical specifications for 140CPU43412

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Technical notes

Technical notes

Our World，Made Possible By Manufacturing.

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