IC693CPU341 | GE Fanuc Series 90-30 | 80KB 20MHz Single-Slot Modular CPU Module

Module Overview

The IC693CPU341 is a reliable mid-range processor within the GE Fanuc (Emerson) Series 90-30 PLC ecosystem. Built on a 20 MHz 80188 (90C188XL) microprocessor, this single-slot module provides a significant upgrade in user memory and processing speed compared to entry-level 90-30 controllers. It is designed for modular baseplates and supports multi-rack configurations, making it suitable for applications that require moderate I/O counts and expanded register storage. By utilizing the power supply's physical port, the IC693CPU341 enables seamless integration with SNP and SNP-X slave protocols for HMI and programming access.

Comprehensive Technical Specifications

The following technical profile details the execution performance and memory mapping capabilities of the IC693CPU341.

• Microprocessor Type: 80188 (90C188XL) running at 20 MHz

• User Logic Memory: 80 Kilobytes (RAM and Flash storage supported)

• Boolean Execution Speed: 0.3 milliseconds per 1K of logic

• Register Memory (%R): 9,999 Words

• Discrete I/O Capacity: 512 Input points (%I) and 512 Output points (%Q)

• Analog I/O Capacity: 1,024 Input words (%AI) and 256 Output words (%AQ)

• System Expandability: Supports up to 5 baseplates total (1 CPU baseplate + 4 Expansion or Remote racks)

• Backplane Power Consumption: 490 mA at +5V DC

• Serial Interface: 1 SNP/SNP-X Port (accessed via the PLC Power Supply connector)

• Timers and Counters: Over 2,000 available instances

• Interrupt Support: Yes, supports hardware-timed and I/O interrupts

• Shift Register Support: Yes, natively handled in the instruction set

System Configuration and Expansion

As a modular CPU, the IC693CPU341 must be installed in Slot 1 of a Series 90-30 CPU baseplate. It is engineered for scalability, allowing engineers to connect up to four additional racks via expansion cables or Remote I/O interfaces. This flexibility ensures that the controller can manage distributed field devices across a wide physical area (up to 50 feet for local expansion). Logic development and hardware configuration are typically managed via Proficy Machine Edition or legacy Logicmaster 90-30 software.

Functional Comparison: IC693CPU341 vs. IC693CPU340

While both modules share a similar physical form factor, the IC693CPU341 offers distinct advantages for larger logic programs:

• Memory Capacity: The 341 model provides 80KB of user memory, doubling the 40KB capacity typically found in the 340 model.

• Processor Efficiency: Both utilize the 80188 architecture, but the IC693CPU341 is optimized for more complex data handling across its 9,999-word register bank.

Technical FAQ

Does the IC693CPU341 have an onboard serial port?

No. Like many modular 90-30 CPUs, it does not have a physical port on the CPU faceplate itself. Communication is established through the RS-485 port located on the system Power Supply module.

How is the user program protected during power loss?

The IC693CPU341 relies on the lithium battery located in the power supply to maintain RAM. For permanent, battery-free storage, the user program can be written to the internal Flash memory.

Can I use this CPU in a 10-slot rack?

Yes. It is compatible with both 5-slot (IC693CHS397) and 10-slot (IC693CHS391) modular CPU baseplates.