Schneider 140CPU21304C CPU Controller

This processor serves as the central controller for Schneider Modicon Quantum automation systems. It manages high-speed logic execution for complex industrial processes. Therefore, it delivers reliable control for power plants, water treatment, and manufacturing lines.

Physical and Power Specifications

The Schneider 140CPU21304C measures 27.0 cm in length and 18.5 cm in width. Moreover, its processor weight equals approximately 0.82 kg for rack mounting. A single 48-pin male connector links this CPU to the Quantum backplane. Additionally, the processor includes dual communication ports and a PCMCIA expansion slot.

Parameter	Specification
Brand	Schneider Electric
Full Model	140CPU21304C
Category	CPU Controller (Modicon Quantum)
Dimensions (L x W x H)	27.0 cm x 18.5 cm x 4.5 cm (10.63″ x 7.28″ x 1.77″)
Processor Weight	0.82 kg (1.81 lbs)
Backplane Interface	1 x 48-pin Male Connector (Quantum Rack)
Power Supply Input	5 VDC from Backplane (1.4 A Typical)
Power Consumption	7.0 W (Typical)
Processor Type	32-bit RISC (50 MHz)
Program Memory	256 kB RAM (Battery Backed)
Data Memory	128 kB RAM (Retentive with Battery)
Backup Battery	140XCP90000 (Lithium, 3V)
Execution Speed	0.2 µs per Boolean Instruction
Communication Ports	1 x RS-232 (Modbus) + 1 x RS-485 (Modbus Plus)
PCMCIA Slot	Type II (Memory or Communication Expansion)
Supported PCMCIA Cards	SRAM (Up to 4 MB) + Flash + Modbus Plus
Programming Software	Concept or Unity Pro XL
Programming Languages	Ladder (LD) + FBD + SFC + IL + ST
Task Types	Cyclic + Periodic + Event + Interrupt
Maximum Local I/O	8192 Points (Digital) or 512 Channels (Analog)
Maximum Remote I/O	32 Advantys STB Islands via Modbus Plus
On-Board Components	1 CPU IC + 3 Memory Chips + 2 UARTs + 1 RTC + 4 Line Drivers + 6 Protection Diodes
Operating Temperature	0°C to +60°C (32°F to 140°F)
Mounting Type	Quantum Rack (Single Slot, Hot Standby Capable)

Energy Storage and Data Retention Features

The Schneider 140CPU21304C stores energy using six onboard capacitors. Specifically, four tantalum capacitors filter logic power for the CPU and memory circuits. In addition, two electrolytic capacitors provide hold-up energy during backplane power dips. Furthermore, a replaceable lithium battery retains all program and data memory. Consequently, this processor preserves critical control logic for up to five years.

Communication and Expansion Capabilities

You will find two serial ports for industrial networking on this processor. For instance, the RS-232 port supports Modbus RTU for programming and HMI connectivity. Likewise, the RS-485 port handles Modbus Plus at 1 Mbps for peer-to-peer communication. Moreover, the PCMCIA slot accepts memory cards for program backup or protocol expansion. Thus, this processor integrates seamlessly into large Quantum architectures.

Scan Performance and Task Management Features

This processor executes Boolean instructions in just 0.2 microseconds. In addition, it supports cyclic, periodic, event, and interrupt tasks for real-time control. Furthermore, a built-in watchdog timer monitors program execution for faults. Therefore, the Schneider 140CPU21304C meets demanding response time requirements reliably.

Installation and Diagnostic Indicators

Three LED indicators sit on the front panel for quick diagnostics. First, a green Power LED lights when the 5 VDC backplane supply is present. Second, a green Run LED flashes during normal program execution. Third, a red Fault LED indicates hardware or software errors. Additionally, a yellow Battery Low LED warns when the backup battery needs replacement. Thus, you can monitor system health at a glance.