Configured for multi-rack backplane interconnection in GE Fanuc Series 90-30 programmable logic controllers, the GE Fanuc IC693CBL300 (IC693CBL300 I/O Bus Expansion Cable) provides direct physical/electrical execution of expansion bus data signals.

Cable Architecture & Interface Configuration

The IC693CBL300 functions as a factory-assembled Wye cable designed for I/O bus expansion across Series 90-30 expansion racks. It features a single male 25-pin D-sub connector on the host end and a dual-headed 25-pin D-sub connector configuration on the expansion end, enabling daisy-chain signal routing across backplane expansion ports.

Physical & Electrical Performance Data

Backplane Bus Communication Velocity & Network Integrity

The IC693CBL300 maintains deterministic backplane bus communication velocity across expansion baseplates by utilizing internal twisted-pair differential signaling lines. High-density braid shielding prevents high-frequency transient interference from distorting high-speed parallel bus cycles between the primary CPU rack and downstream expansion racks.

Package Component List

• 1 x GE Fanuc IC693CBL300 I/O Bus Expansion Cable (1 Meter)

Field Mounting & Bus Wiring Guidelines

• Power Interruption: Disconnect power from all rack power supplies before attaching or removing expansion bus cables to prevent backplane transceiver damage.
• Connector Fastening: Tighten all 25-pin D-sub connector thumbscrews securely into backplane D-shell standoffs to ensure frame ground continuity.
• Cable Routing: Route the expansion cable in dedicated wireways separate from 230 VAC power wiring and motor drive outputs to prevent inductive noise coupling.
• Bus Termination: Verify that the final open connector in the daisy chain contains a proper I/O bus terminator plug as required by system topology rules.

Frequently Asked Questions

• Q: What is the primary function of the IC693CBL300 cable assembly?

  A: The cable interconnects the primary CPU rack to expansion backplanes within a GE Series 90-30 PLC system architecture.

• Q: What is the physical length and structure of the cable?

  A: The cable measures 1.0 meter (3 feet) in length and uses a Wye configuration with one male D-sub end and two branch D-sub ends.

• Q: Can the IC693CBL300 cable be connected or disconnected under power?

  A: No, backplane expansion cables must never be hot-swapped; power to all connected racks must be turned off prior to installation.

• Q: What connectors are installed on each end of the cable assembly?

  A: One end has a single 25-pin male D-sub connector, while the opposite end splits into a dual-headed 25-pin D-sub connector interface.

• Q: What is the operating temperature range for field installation?

  A: The operational ambient temperature rating for the IC693CBL300 is specified from 0 deg C to 60 deg C (32 deg F to 140 deg F).

• Q: Is external power required for the expansion cable?

  A: No, the cable is a passive interconnect assembly that routes differential data and logic ground signals between backplanes.

• Q: Why is a Wye cable configuration required for I/O expansion?

  A: The dual-headed termination permits bus signal continuation to downstream expansion racks without requiring separate tap boxes.

• Q: Does the cable provide shielding against electromagnetic noise?

  A: Yes, the cable incorporates continuous foil and braided shielding bonded directly to the metal D-sub connector shells.