IS215VCMIH2C

IS215VCMIH2C is a VME Bus Master Controller Board manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Control Systems. The communication link between the controller and the I/O boards, as well as the link to the IONet system control network, is provided by the VME Bus Master Controller (VCMI) board. The IDs for all the boards in the rack and their corresponding terminal boards are managed by VCMI, which is also the VME bus master in the control and I/O racks.

• The IONet may link to various I/O racks, each of which has a VCMI board. Three simplex system setups using the VCMI with local and distant I/O are shown in the accompanying figure.
• The first example is a compact system in which all of the I/O is mounted in the VME control rack, negating the need for any additional distant I/O racks. The VCMI features three IONet ports, with one for each of the three channels (R, S, and T).
• A larger system with distant I/O racks makes up the second illustration. Although many I/O racks are supported by one IONet, only one rack is displayed here. Regarding I/O boards and points, all I/O channels (R, S, and T) are identical.