Schneider 110CPU51202: Integrated CPU Module

Core Function of This CPU Module

The Schneider 110CPU51202 combines a processor and power supply in one unit. This CPU module executes control logic for Modicon Micro PLC systems. It powers itself directly from an AC mains supply without external converters. Consequently, the module simplifies panel wiring and reduces component count.

Physical Dimensions and Enclosure Design

This CPU module measures 140 mm in total height. Its width reaches 80 mm for a compact standalone form factor. The unit depth stands at 95 mm including the terminal blocks. You will find a molded thermoplastic housing with integral mounting tabs. The Schneider 110CPU51202 weighs approximately 0.55 kilograms for DIN rail mounting.

Processor and Memory Configuration

The Schneider 110CPU51202 houses a 16-bit microcontroller running at 20 MHz. This CPU executes ladder logic and function block diagrams efficiently. The unit contains 64 KB of flash memory for user program storage. It also includes 8 KB of battery-backed RAM for runtime variables. A lithium battery preserves RAM data during power loss for one year.

AC Power Supply and Input Ratings

This CPU module accepts 100 to 240 V AC input voltage directly. The wide range covers 120 V and 230 V nominal supplies worldwide. Input frequency spans from 47 to 63 Hz for global compatibility. The unit draws a maximum input current of 0.5 A at 115 V AC. An internal switching power supply generates 5 V and 24 V for the system.

Integrated I/O and Local Channels

The Schneider 110CPU51202 provides 12 digital input channels built into the unit. It also includes 8 digital output channels for direct actuator control. The inputs accept 24 V DC from sensors and limit switches. Each input draws 7 mA at 24 V DC with a 2 ms response time. The outputs are relay type rated at 2 A at 250 V AC.

Expansion Capabilities and I/O Capacity

This CPU module supports up to 60 additional I/O points via expansion modules. A dedicated expansion port connects to TSX Micro I/O modules. The unit handles a maximum of 70 total digital I/O channels. It also manages up to 8 analog I/O channels for process applications. The module supports Modbus communication for networking with other devices.

Communication Ports and Programming Interface

The Schneider 110CPU51202 offers one RS-232 port for programming and debugging. It also provides one RS-485 port for Modbus serial networking. A standard 8-pin mini-DIN connector serves as the programming interface. The unit includes a built-in real-time clock for time-stamped events. The clock uses a supercapacitor that holds time for 7 days without power.

Status Indicators and Diagnostic Features

This CPU module provides 14 LED status indicators. A green power LED illuminates when the unit receives AC input. A yellow run LED flashes during normal program execution. A red fault LED signals hardware or software errors. Eight green LEDs show the status of each input channel. Four red LEDs indicate which output relays are energized.

Energy Storage and Hold-Up Time

The Schneider 110CPU51202 incorporates three 470 µF bulk capacitors on the DC bus. These capacitors store energy to bridge brief input power interruptions. The hold-up time reaches 20 milliseconds at full rated load. Total stored energy reaches approximately 0.5 joules at nominal voltage. This storage prevents CPU resets during momentary AC voltage sags.

Installation and Programming Notes

You must mount this CPU module on a standard 35 mm DIN rail. Always connect the ground terminal to the system earth before applying power. Then, write your control program using Schneider EcoStruxure Machine Expert software. The module requires a standard programming cable for initial configuration. Regular program backups prevent data loss during unexpected power outages.