GE IC693CPU311 Series 90-30 Central Processing Unit

The GE IC693CPU311, also cataloged as the IC693CPU311 Central Processing Unit, serves as the primary IC693CPU311 Central Processing Unit utilized to execute localized logic processing across Series 90-30 PLC platforms. Fabricated with an integrated 5-slot baseplate assembly, the module embeds a 10 MHz processor to execute logic scans directly over its native physical channels. Memory architectures support RAM, EPROM, and EEPROM profiles, operating without an integrated hardware real-time clock, interrupt vectors, or override configuration services.

Hardware Specifications

Backplane Bus Communication Velocity and Firmware Flash Compatibility

The hardware incorporates fixed backplane bus communication velocity traces mapped directly into the embedded 5-slot design, optimizing physical register polling across discrete and analog modules. The serial peripheral channel, routed physically through the matching PLC power supply module, runs dedicated SNP and SNP-X industrial slave link protocols. While firmware flash compatibility maps network pathways to remote options like Profibus, FIP, Ethernet, and Genius Bus Controllers, the hardware explicitly restricts integration with high-level PCM or CCM co-processors.

Frequently Asked Questions

Q: Where is the physical serial interface connector located for this CPU configuration?

A: The physical serial communications connector is not located on the CPU faceplate itself; instead, it is housed directly within the matching power supply module mounted adjacent to the processor assembly on the baseplate.

Q: What happens to the internal volatile register data during a complete power loss?

A: Because the hardware lacks an onboard battery-backed clock/memory circuit, logic protection requires the installation of non-volatile EPROM or EEPROM memory chips, or an external battery backup connected to the power supply module.

Q: Can PCM or CCM communication modules be deployed within this 5-slot baseplate?

A: No. The internal logic microcode of this specific baseline processor does not contain the register resources necessary to support Series 90-30 Programmable Coprocessor Modules (PCM) or Communications Control Modules (CCM).

Field Installation Guidelines

• Baseplate Structural Grounding: Secure the integrated 5-slot baseplate assembly to the enclosure backpanel using conductive screws. Ensure the rear grounding strip achieves direct metal-to-metal contact with the panel plane to dissipate electrical transients.
• Memory Module Orientation: Prior to executing system power-up sequences, verify the physical alignment keys of any optional EPROM or EEPROM chips inserted into the internal sockets to avoid structural pin failure.
• Serial Network Isolation: Route all serial links originating from the power supply port away from heavy motor power leads or variable frequency drive cables to mitigate induced common-mode noise on the SNP network.