GE Fanuc Series 90-30 IC693CPU374 Ethernet CPU Module

Product Insights

The IC693CPU374 is a high-performance, single-slot Central Processing Unit designed for the GE Fanuc Series 90-30 PLC platform. Built on an embedded 133 MHz 586 processor, this module integrates advanced logic execution with a built-in Ethernet switch to facilitate high-speed industrial networking. In critical sectors such as water treatment, HVAC control, and automated assembly lines, the IC693CPU374 serves as the primary intelligence, significantly reducing system latency with a scan rate of 0.15 milliseconds per 1K of logic. Its dual-port Ethernet interface allows for daisy-chaining and seamless data exchange via SRTP and EGD protocols, eliminating the need for external communications modules and optimizing cabinet space while ensuring maximum uptime through hardware-accelerated floating-point math and robust memory management.

Technical Configuration

The IC693CPU374 utilizes a sophisticated memory and communication architecture to handle complex automation tasks:

• Logic Processing: Equipped with a 133 MHz 586-class processor, providing the computational power required for hardware-based floating-point calculations and rapid boolean execution.

• Memory Management: Features 240 KB of configurable user memory. Users can dynamically allocate space between register memory (%R), analog inputs (%AI), and analog outputs (%AQ) up to a maximum of 32,640 words each.

• Integrated Ethernet Switch: The module includes a built-in 10/100 Mbps auto-sensing Ethernet switch with two RJ-45 ports. This hardware supports a single IP address and is optimized for Ethernet Global Data (EGD) and SRTP communications.

• I/O Capability: Supports a comprehensive I/O map with 2,048 fixed discrete inputs/outputs and system expandability across up to 8 total baseplates (1 CPU baseplate plus 7 expansion or remote racks).

Hardware Specifications

Common Operational Queries

Does the IC693CPU374 support direct serial programming?

The CPU module itself has no built-in serial ports. All serial communication and local programming via RS-485 must be performed through the port located on the system Power Supply module using SNP or SNPX protocols.

What is the recommended power supply for this CPU?

Due to the 7.4 Watt power draw from the 5 VDC bus, it is highly recommended to use a High Capacity Power Supply (such as the IC693PWR330 or IC693PWR331) to ensure stable operation, especially when additional high-draw I/O modules are present.

How does memory backup work for this specific model?

The CPU uses RAM for active storage. The standard internal battery provides approximately 1.2 months of backup without power. For extended shutdowns, the IC693ACC302 auxiliary battery module can be utilized to increase this period to 15 months.

Engineering & Installation Guide

• Ethernet Network Stability: Although the CPU features two Ethernet ports, they function as an unmanaged switch sharing a single IP address. Do not create a physical loop between these ports, as this will cause a broadcast storm and crash the network interface. Use high-quality shielded RJ-45 cables to mitigate EMI in high-voltage environments.

• Thermal Regulation: The IC693CPU374 generates significant heat due to its 133 MHz processor. Ensure a minimum of 2 inches (51 mm) of clearance above and below the PLC rack for natural convection. In enclosures where ambient temperatures exceed 45 deg C, active fan cooling is required to prevent CPU throttling or thermal shutdown.

• Memory Retention Strategy: When performing a firmware upgrade or module replacement, always backup the user program to Flash memory or a PC using VersaPro or Machine Edition. Since this CPU relies on RAM for runtime logic, any disruption in battery power while the main rack is unpowered will result in a total loss of the configuration and user logic.