Product Overview

The IC693CPU351 is the central processing unit (CPU) module within General Electric's 90-30 series programmable logic controller (PLC) platform. Serving as the primary controller for the 90-30 series rack, it performs the following functions within industrial control systems: interpreting user logic, coordinating I/O updates, handling communication tasks, and executing automation operations.

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Functional Overview
The IC693CPU351 serves as the core controller for the 90-30 series PLC system:
Logic Execution: Parses ladder diagrams or other control programs during each scan cycle and updates system status.
I/O Management: Reads field inputs and writes outputs via the baseplate and expansion racks, supporting high node counts.
Communication Capabilities: Equipped with three serial ports, supporting connections to monitoring systems or field devices via SNP, SNPX, and RTU protocols.
Memory Configuration: Program area, register area, and analog storage area can be configured in blocks, providing flexible memory allocation for complex applications.
Timers and Counters: Offers over 2000 timers and counters for event timing and control sequence management.
Typical Industrial Applications
IC693CPU351 is widely used in industrial automation applications requiring robust control and distributed I/O:
Manufacturing and machinery control: Complex sequence control and discrete logic control.
Material handling facilities: Coordination of sensors, actuators, and safety interlock devices.
Water/wastewater treatment plants: Distributed I/O and execution of process control logic.
Energy and utilities: Power generation, distribution automation, and protection interlock systems.
Process Industries: Chemical, petrochemical, and food processing systems.
Specifications
| Specification | Description |
|---|---|
| Part Number | IC693CPU351 |
| Module Type | CPU Module |
| PLC Family | Series 90-30 |
| Processor | Intel 80386EX, 25 MHz clock |
| User Program Memory | Up to 240 KB |
| Discrete I/O Capacity | 2048 inputs + 2048 outputs |
| Analog I/O Capacity | Up to 32,640 words |
| Serial Ports | 3 built-in (SNP/SNPX/RTU) |
| Scan Performance | ~0.22 ms per 1 K Boolean logic |
| Power Requirement | +5 V DC @ ~890 mA |
| Battery-Backed Clock | Yes |
| Expansion Support | Up to 7 I/O expansion + 7 remote racks |
| Operating Temp. | 0 °C to 60 °C (32 °F – 140 °F) |
| Firmware | Supports floating point math (≥v9.0) |
Product FAQ – IC693CPU351

IC693CPU351
Q1: How does the IC693CPU351 differ from other 90-30 series CPUs?
A: Compared to entry-level CPUs in the same series, the 351 model offers greater memory capacity, enhanced I/O processing capabilities, and additional serial communication ports, making it suitable for large-scale automation projects.
Q2: Can this CPU handle Ethernet communication without adding expansion modules?
A: No-it requires an optional communication module to connect to Ethernet or networks beyond the built-in serial ports.
Q3: Is the memory configurable?
A: Yes-program and data memory can be partitioned into distinct regions to support large or diverse control tasks.
Q4: What is the maximum I/O coverage?
A: This CPU supports up to 2048 discrete inputs and 2048 discrete outputs, with additional support for up to 32,640 analog words within the memory configuration.
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