The 45C305 is an enhanced processor module for Reliance AutoMate 30 series PLC systems. As the core control unit, it executes user programs, processes I/O signals and manages network communication. It is fully compatible with AutoMate 30 series backplanes. This product has been discontinued, and only refurbished, surplus or NOS units are available for maintenance and replacement of legacy industrial automation systems.

45C: Unified prefix for control components of Reliance AutoMate 45C series. 305: Designates the enhanced processor module for AutoMate 30 platforms. No revision letter means it is the original standard hardware version.

Processor: Enhanced 16-bit processor. Program Memory: 4K × 16-bit memory. Maximum I/O Capacity: Supports up to 4 local I/O heads or 4 I/O ports. Communication Baud Rate: 250k baud with parity check. Status Indicators: Five LED indicators including COMM DATA, RAIL FAULT, READY, FORCING and RUN. Power Supply: 24 VDC from backplane, maximum load current 3A, power consumption 50W, equipped with a 3AG 3A replaceable fuse. Operating Temperature: -10°C to +50°C. Humidity: 5% to 95% non-condensing. Enclosure: Rugged metal housing for industrial use.

Backplane Interface: Proprietary edge connector for power supply and data exchange with the PLC backplane. Communication Port: Front-panel RS-232C interface for programming and data transmission. Supported Protocols: R-NET, Modbus RTU and ASCII protocols. Programming Interface: Dedicated port for program upload, download, online editing and system diagnosis. All interfaces are clearly marked for convenient field commissioning and troubleshooting.

It runs ladder logic and function block programs to realize logic control, motion control and process regulation. It manages local I/O modules to complete field data collection and output control tasks. It supports R-NET network connection to achieve data interaction between PLCs, HMIs and host computers. It features built-in self-diagnosis function, and LED indicators help quickly judge the operating status and locate faults. It adopts data cache and power-off protection design to protect important operational data. It delivers improved operating performance compared with standard processor modules.

It is used to replace aging processor modules in legacy AutoMate 30 series PLC systems. It is widely applied in manufacturing production lines, water treatment, power, metallurgy and other industrial fields. It is suitable for automation projects requiring large I/O capacity and multi-device networking. It is also an ideal choice for old equipment renovation to retain the original system structure and save renovation costs.

Cut off the system power before installation, then insert the module firmly into the corresponding backplane slot. Check wiring connections and fuse specification before powering on to prevent short circuit and overload. Monitor the working state through LED indicators during operation. Perform quarterly routine maintenance to clean dust and tighten wiring terminals, and regularly inspect the fuse condition. Disconnect all power and wait for complete discharge before disassembly or maintenance to avoid electric shock. Use this module only with compatible accessories of AutoMate 30 series.