GE Fanuc IS200VCMIH1BCC VME Communications Interface Board

Description

The GE IS200VCMIH1BCC, also cataloged as the IS200VCMIH1B VCMI board, serves as the primary communications interface for VME‑rack data exchange within the Mark VI Speedtronic platform. The module transfers I/O, protection, and controller data across the VME backplane and manages IONet communication when installed in a control module.

Suffix Breakdown & Model Matrix

• The IS200VCMIH1BCC identifier does not include decomposable suffix elements.

• No variant matrix is defined in the provided documentation.

• The part number is treated as a fixed Mark VI VCMI hardware designation.

Hardware Specifications

• Part Number: IS200VCMIH1BCC

• Brand: GE

• Series: Mark VI Speedtronic

• Functional Abbreviation: VCMI

• Assembly Type: Normal assembly

• Revision Total: 3 revisions

• Backward Compatibility: First two revisions

• Country of Manufacture: United States

• Product Type: VME Communications Interface Board

• Faceplate Features: IONet port, grouped LED indicators

• Coating: Conformal PCB coating

• Backplane Role: VME bus communication and data transfer

Backplane Bus Communication Velocity & Deterministic Networks

• The VCMI board manages high‑speed VME backplane communication, coordinating data exchange between I/O cards, interface modules, protection modules, and the main processor.

• When installed in a control module, the VCMI functions as the IONet bus master, using IEEE 1588‑based timing for deterministic data transfer.

• IONet operates as a private Ethernet network (10Base2) dedicated to Mark VI I/O packs and controllers.

• In triple‑redundant systems, three VCMI boards (R, S, T) exchange data and perform voting before forwarding results to the main processor.

• Internal routing minimizes cross‑trace interference, supporting stable communication cycles across mixed‑module racks.

Functional Description

• Transmits internal information between VME‑rack I/O cards and external interface modules.

• Provides the timing and synchronization backbone for IONet communication.

• Supports simplex and triple‑redundant Mark VI architectures.

• Includes a faceplate with LED indicators for link status, module health, and communication activity.

• Uses conformal coating to protect PCB surfaces from moisture and contaminants.

• Identified by the VCMI functional acronym and IS200 series manufacturing code.

Frequently Asked Questions (FAQ)

• Q: Can the IS200VCMIH1BCC be inserted or removed while the rack is powered? A: No. VME‑based Mark VI modules must be installed or removed only when the rack is powered down to avoid bus faults.

• Q: Does the VCMI board always act as the IONet master? A: Only when installed in a control module. In I/O or protection racks, it functions as a communication interface rather than a master.

• Q: Are the three VCMI boards in a TMR system identical in function? A: Yes. Each board independently exchanges data, and results are voted before being sent to the processor.

Field Installation Guidelines

• Maintain ESD protection during handling; the board contains MOS‑sensitive components.

• Ensure the VCMI is fully seated in its designated VME slot to maintain backplane continuity.

• Verify IONet cabling and grounding before powering the system.

• Route Ethernet and coaxial cables with strain relief to prevent connector fatigue.

• Confirm LED indicators after power‑up to validate communication and module health.

• Avoid routing high‑voltage wiring near IONet or VME communication paths to reduce noise coupling.