Scalability

Supports 1 CPU baseboard plus up to 4 expansion or remote baseboards, enabling flexible multi-site distributed control architectures. The system supports a maximum of:

512 discrete I/O points

128 words of analog input (AI)

64 words of analog output (AO)

This makes it well suited for medium to large control systems requiring modular expansion.

Program Execution and Memory

User program memory: Up to 32 KB (RAM with optional Flash or EPROM)

Register memory: 19.9 KB

Battery-backed real-time clock to preserve time and critical data

Supports program override, periodic subroutine interrupts, and interrupt-driven execution, enhancing control flexibility and responsiveness

Communication Expansion

Equipped with one built-in RS-232 serial port supporting SNP / SNP-X slave communication. Additional communication capabilities—such as SNP-X master, RTU master/slave, Profibus, and others—can be added via CMM or PCM communication modules, allowing seamless integration into various industrial networks.

Performance Improvements

Compared to the CPU323, this controller offers:

Faster processor performance

Doubled memory capacity

Support for rack expansion

Enhanced communication options

These improvements make it more suitable for complex logic processing and multi-module coordinated control.

Technical Specifications

Processor: Intel 80C188XL, 20 MHz, 16-bit architecture

User Program Memory: 32 KB (RAM + optional Flash/EPROM)

Register Memory: 19.9 KB

Boolean Logic Scan Rate: 0.3 ms per 1K points

Baseboard Configuration: 1 CPU + up to 4 expansion/remote baseboards (maximum 5 total)

Maximum I/O Capacity:

512 discrete I/O points

128 words analog input

64 words analog output

Communication Interface:

1 × RS-232 serial port (SNP / SNP-X slave)

Backplane Power: 5 VDC, approximately 490 mA

Operating Environment:

Temperature: 0 °C to +60 °C

Humidity: 5% to 95% RH, non-condensing

Additional Features

Battery-backed real-time clock

Program override capability

Interrupt support