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Schneider C924 Central Processing Unit

Brand/Manufacturer: Schneider Electric

Order Number: C924

Type: Central Processing Units

Country of Origin: France

Condition: Original Brand

Lead Time: Available in stock

Payment Term: 100% TT In Advance

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Description

The Schneider C924, also cataloged as the C924 central processing unit, operates as a dedicated hardware component for binary logic and arithmetic execution tasks within Modicon automation systems.

Suffix Breakdown & Model Matrix

Model Identifier Architecture Variant Memory Configuration Nominal Supply Voltage
C924-Standard Base Hardware Unit 28 KB RAM / 10 KB Flash 24 VDC
C924-E Extended Communications Variant 28 KB RAM / 10 KB Flash 24 VDC

Hardware Specifications

Parameter Specification
Model C924
Brand Schneider Electric
Origin France / Global Manufacturing Facility
Weight 0.25 kg
Dimensions 45 mm x 70 mm x 95 mm
Operating Temp 0 deg C to 55 deg C
Power Consumption 24 VDC nominal supply
Product Type Central Processing Unit
Internal RAM 28 KB
Flash Memory 10 KB
I/O Capacity Up to 128 discrete I/O points
Protection Class IP20

Profinet / EtherNet/IP deterministic networks

The Schneider C924 executes deterministic program cycles using high-speed internal backplane bus communication velocity licences to synchronize data exchange with local expansion blocks. The onboard microcontroller processes arithmetic loops and binary logic strings independently while updating the 28 KB internal RAM storage space. Flash memory blocks handle non-volatile user program retention, bypassing the need for external battery backup circuits and eliminating maintenance downtime associated with periodic cell replacement.

Frequently Asked Questions

Q: Does the C924 require an external battery for user program retention during a power loss?

A: No. All user programs are written to built-in non-volatile flash memory, meaning the device retains code indefinitely without a battery or supercapacitor.

Q: What is the maximum local I/O capacity supported by this CPU?

A: The processor handles up to 128 local discrete I/O points utilizing external TSX Nano expansion modules connected via the internal bus.

Q: What software packages are compatible with the programming port?

A: The single RS-232 mini-DIN serial interface connects directly to programming terminals running PL7 Junior or ProWORKS software environments.

Field Installation Guidelines

  1. Power Isolation: Disconnect the external 24 VDC power supply before mounting or removing the CPU unit to prevent electrical arcing on backplane pins.
  2. Mounting Execution: Secure the unit onto a standard 35 mm DIN rail or fasten it directly to a backplate using the integrated mechanical enclosure slots.
  3. Grounding and Shielding: Connect the system ground terminal to low-impedance earth ground to maintain IP20 protection compliance and mitigate electrical noise.
  4. Communication Wiring: Use shielded RS-232 cables for programming connections, ensuring shield drain wires are terminated correctly at the grounding bar.
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