IS215VCMIH2C Mark VI VME Communications Card GE

Product Description

The IS215VCMIH2C was designed as a VME Communication Card in a GE Mark VI Turbine Control System and is critical to the correct function of the system as a whole. The VCMI VME Communication board allows Input/Output (I/O) cards to communicate with other I/O cards that are mounted on the VME backplane, with I/O cards installed on expansion racks, with I/O backup protection modules, with triple redundant control modules, and with the primary or main processor module. 

The IS215VCMIH2C card is also broadly referred to as a VME Bus Master Controller. This PCB interfaces communications among the I/O boards and the controller.  It also acts as the communication interface to the system control network, or IONet.   

The IS215VCMIH2C is built with four port connections placed into its front faceplate.  These include an RS-232C Serial port, D-style plug connector, and three IONet 10Base2 Ethernet ports.  Each of the IONet connectors is associated with three LED indicators that are labeled TX/RX/CD. The board has additional LED indicators that are labeled Status, Fail, Run, and 1,2,4, and 8.  The former is placed above a reset switch (push button,) while the latter is directly below the serial port.

Each control module in the Mark VI system generally contains an IS215VCMIH2C, with these unique VCMI cards serving to communicate execution data with the main processor modules via the application software for the control system. Because of the critical nature of the VCMI modules, it is advisable to keep additional spares on the shelf to avoid a machine down situation.