GE IC693ACC307 Series 90-30 Expansion Bus Terminator

Product Overview

The GE Fanuc IC693ACC307 serves as the essential hardware component for maintaining signal integrity within Series 90-30 PLC expansion systems. This 100% Brand New original 25-pin terminator plug must be installed on the final "I/O Bus Expansion" port of a multi-baseplate system. It prevents electrical signal reflection across the high-speed expansion bus, ensuring that the CPU communicates accurately with remote I/O racks. Without this component, electromagnetic interference and signal echoes can cause unpredictable I/O behavior or system faults in multi-rack architectures.

Technical Specifications

Engineering Advantages

• Elimination of Signal Reflection: The IC693ACC307 provides the precise impedance matching required at the end of the Series 90-30 expansion chain. This prevents data packets from "bouncing" back along the cable, which otherwise disrupts communication between the CPU and expansion racks.

• Simplified Multi-Rack Installation: The compact, 25-pin plug-in design allows for instantaneous installation. Engineers simply plug the terminator into the unused "OUT" port of the last expansion baseplate in the system to finalize the hardware configuration.

• Protection Against Communication Faults: High-speed I/O buses are highly susceptible to electrical noise in industrial environments. This terminator effectively "closes" the circuit, stabilizing the voltage levels across the bus and preventing the CPU from triggering "Loss of I/O Module" or "Expansion Bus Error" alarms.

• Rugged 25-Pin Construction: Built to withstand industrial vibration and thermal cycling, the heavy-duty D-sub connector ensures a secure mechanical fit. This reliability is vital for systems in constant-motion environments like material handling or high-vibration power plants.

FAQs

• Q: When is the IC693ACC307 strictly required?

• A: You must use the IC693ACC307 whenever your Series 90-30 system includes one or more expansion baseplates. It plugs into the bottom 25-pin port of the very last expansion rack in your daisy-chain.

• Q: Can I use a standard 25-pin serial terminator instead?

• A: No. The internal resistance values of the IC693ACC307 are specifically tuned to the electrical characteristics of the GE Fanuc Series 90-30 I/O bus. Using a generic terminator can result in communication instability or hardware damage.

• Q: Does a single-rack system (CPU baseplate only) need this plug?

• A: No. If you only have one baseplate (the one containing the CPU) and no expansion racks, the bus does not require external termination.

• Q: How can I tell if my terminator has failed?

• A: Bus termination issues usually manifest as intermittent I/O errors, flickering status LEDs on expansion modules, or the CPU failing to recognize all modules in the expansion racks. Replacing an old or damaged terminator with a Brand New unit often resolves these communication glitches.