The GE IS215VCMIH2CB, also cataloged as the IS215VCMIH2CB VME communications card, serves as the primary communication and monitoring interface for controller‑to‑I/O data exchange across Mark VI VME racks. It operates as the VME bus master, manages rack‑level board identification, and conditions diagnostic signals for the IONet system control network.
Hardware Specifications
Parameter
Specification
Model
IS215VCMIH2CB
Brand
General Electric
Origin
United States
Weight
Not specified
Dimensions
Not specified
Operating Temp
Not specified
Power Consumption
Not specified
Product Type
VME Communications Card
Series
Mark VI
Channels
8
Analog Span
0.3532 to 4.054 V
Monitored Voltages
5 V, 12 V, 15 V, 28 V
Diagnostic Inputs
Differential ±5 V analog, digital logic inputs
External Monitor Lines
P28A, PCOM
Ground Fault Detection
Supported
Bus Role
VME bus master
Backplane Bus Communication Velocity Licenses
As the VME bus master, VCMI governs deterministic communication cycles across both control and I/O racks. It assigns board IDs, arbitrates bus access, and synchronizes data transfers with fixed timing windows. The card’s firmware flash defines alarm thresholds, analog‑input scaling, and IONet communication parameters. Deterministic Ethernet behavior ensures stable I/O density scaling across the Mark VI platform, with VCMI acting as the authoritative timing source for rack‑level coordination.
Frequently Asked Questions
Q: Can IS215VCMIH2CB be replaced while the VME rack is energized? A: No. The rack must be powered down to avoid undefined bus‑master states and IONet communication faults.
Q: What diagnostic functions does the card provide? A: It monitors ground faults, P125 V dc over/undervoltage, differential ±5 V analog inputs, external P28A/PCOM lines, and multiple digital logic channels.
Q: How does VCMI interface with the PDM? A: Through connector J301, the card receives diagnostic signals such as ground faults, voltage deviations, and external circuit conditions.
Field Installation Guidelines
Power down the Mark VI rack before inserting or removing the VCMI card.
Seat the module firmly into the VME backplane to ensure full connector engagement.
Tighten captive screws to maintain retention under vibration.
Verify J301 diagnostic cabling and IONet Ethernet connections prior to energizing.
Maintain shielded wiring practices for analog and digital diagnostic lines.
After startup, confirm voltage‑monitoring alarms and ground‑fault indicators through controller diagnostics.
