Ultra-Large Memory and Expansion

Provides 240 KB configurable user program memory (RAM + Flash) and register memory expandable from 128 to 32,640 words in 128-word increments. The system supports 1 CPU baseboard plus up to 7 expansion or remote baseboards (a total of 8 racks), delivering exceptional scalability for large automation systems.

Maximum I/O capacity includes:

4096 discrete I/O points

2048 words of analog input (AI)

512 words of analog output (AO)

This architecture is ideal for high-density I/O applications and complex, large-scale logic control.

Operations and Control Functions

Equipped with a built-in floating-point arithmetic unit, enabling high-precision calculations for advanced process control and closed-loop applications. The CPU supports program override, periodic subroutine interrupts, and interrupt-driven execution, and includes a battery-backed real-time clock for reliable timekeeping and event sequencing.

Communication Expansion

The CPU has no built-in serial communication port. RS-232 or RS-485 communication can be added via the power or expansion module interface, while advanced networking options—such as Ethernet, Profibus, FIP, and other industrial protocols—are supported through PCM or CCM communication modules. This modular approach offers maximum flexibility for multi-system and plant-wide networking in large industrial environments.

Performance Positioning

Compared with the CPU 350, this model dramatically increases user program memory from 32 KB to 240 KB and significantly expands register memory capacity. While it omits an onboard serial port, it provides greater communication flexibility through modular expansion. As a result, it serves as the core CPU of the 90-30 series for ultra-large and complex control projects.

Technical Specifications

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

User Program Memory: 240 KB configurable (RAM + Flash)

Register Memory: 128 to 32,640 words (128-word increments)

Boolean Logic Scan Rate: 0.22 ms per 1K points

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

Maximum I/O Capacity:

4096 discrete I/O points

2048 words analog input

512 words analog output

Communication Interface:

No built-in serial port; communication expanded via power/expansion modules or PCM/CCM modules

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