Scalability

Supports 1 CPU baseboard plus up to 7 expansion or remote baseboards (a total of 8 racks), enabling large-scale, multi-site distributed control systems. The controller supports high-density I/O configurations with a maximum capacity of:

2048 discrete I/O points

2048 words of analog input (AI)

512 words of analog output (AO)

This architecture is well suited for complex systems requiring extensive I/O and modular expansion.

Program Execution and Memory

User program memory: 32 KB (RAM with optional Flash or EPROM); some versions support up to 48 KB

Register memory: 19.9 KB

Supports floating-point operations for advanced calculations

Features program override, periodic subroutine interrupts, and interrupt-driven execution

Integrated battery-backed real-time clock for timekeeping and event management

Communication Expansion

Equipped with one built-in RS-232 serial port supporting SNP / SNP-X slave communication. Through optional PCM or CCM communication modules, the system can be expanded to support Ethernet, Profibus, FIP, and other industrial communication protocols, allowing integration into complex and heterogeneous networks.

Performance Advantages

Compared with the CPU 340, this controller features a 32-bit Intel® 80386EX processor, delivering higher processing performance, faster scan times, and substantially increased I/O capacity. Native support for floating-point operations makes it particularly suitable for medium to large-scale control systems with complex logic and computation requirements.

Technical Specifications

Processor: Intel 80386EX, 25 MHz, 32-bit architecture

User Program Memory: 32 KB (up to 48 KB on some versions)

Register Memory: 19.9 KB

Boolean Logic Scan Rate: 0.22 ms per 1K points

Baseboard Configuration: 1 CPU + up to 7 expansion/remote baseboards (maximum 8 total)

Maximum I/O Capacity:

2048 discrete I/O points

2048 words analog input

512 words analog output

Communication Interface:

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

Backplane Power: 5 VDC, approximately 670 mA

Operating Environment:

Temperature: 0 °C to +60 °C

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

Additional Features

Floating-point computation support

Program override capability

Battery-backed real-time clock

Interrupt support