Schneider C924 | Central Processing Unit 24VDC PLC CPU

The Schneider C924 serves as the core controller for Modicon TSX Nano PLC systems. This central processing unit manages I/O scanning and user program execution. It operates with a 24 VDC power supply for industrial environments. You can integrate this CPU into small to mid-sized automation projects.

Processing and Memory Specifications

This CPU executes binary logic and arithmetic operations efficiently. It includes 28 KB of internal RAM for user application storage. An additional 10 KB of flash memory retains programs during power loss. The Schneider C924 does not require an external battery for memory retention. Instead, it uses non-volatile flash technology for reliable data storage.

Physical Dimensions and Mounting

Parameter	Specification
Brand	Schneider Electric
Model	C924
Product Type	Central Processing Unit
Power Supply	24 VDC
Internal RAM	28 KB
Flash Memory	10 KB
Energy Storage	None (flash-based retention)
Weight	0.25 kg (0.55 lbs)
Height	70 mm
Width	45 mm
Depth	95 mm
I/O Capacity	Up to 128 discrete I/O points
Programming Port	1 RS-232 serial interface
Operating Temperature	0°C to 55°C
Protection Class	IP20

The Schneider C924 weighs only 0.25 kg for lightweight panel mounting. Its housing measures 70 mm in height and 45 mm in width. The depth reaches 95 mm including the front connector. You can mount this CPU on a standard DIN rail or directly to a backplate.

Interface and Connectivity

A single RS-232 port supports programming and HMI communication. This serial interface uses a standard mini-DIN connector. You can connect a PC running PL7 Junior or ProWORKS software. The Schneider C924 also supports up to 128 local discrete I/O points. These points connect through external TSX Nano expansion modules.

Energy Storage and Power Behavior

This CPU does not contain any internal battery or supercapacitor. It stores zero energy for program backup under normal conditions. All user programs reside in the built-in flash memory. Therefore, you do not need periodic battery replacements. The device loses only volatile process data during a power interruption.

Installation and Operational Benefits

Transitioning to this CPU simplifies your control system design. The compact footprint saves valuable space inside electrical cabinets. You can program logic, timers, and counters using standard ladder diagrams. The Schneider C924 handles conveyor control, packaging machines, or small pumping stations. For best results, pair this unit with a regulated 24 VDC power supply.