IS200VCRCH1B is a Contact Input/Relay Output Board manufactured by General Electric as part of the Mark VI series used in gas turbine control systems. The Contact Input/Relay Output Board accepts 48 discrete inputs and manages 24 relay outputs from a total of four-terminal boards through its accompanying daughterboard. The double-width VCCC module fits in the VME I/O rack. Two sets of J3/J4 connections are provided in this rack for cabling to the TBCI and TRLY terminal boards. In place of the VCCC, the VCRC is a narrower board that can be used.
CONTACT INPUTS
A contact input terminal board (TBCI) is wired for the first 24 dry contact inputs; a second terminal board is needed for inputs 25â48. The contacts are given dc power. The terminal board is linked to the VME rack housing the VCCC processor board by cables with molded plugs. For inputs monitoring crucial turbine variables, high-speed scanning and recording at 1 ms per second are available. Contact chatter and pulse widths down to 6 ms are reported by the sequence of events (SOE) recorder, together with all contact openings and closures with a temporal resolution of 1 ms.
RELAY OUTPUTS
Twelve plug-in magnetic relays are stored in TRLYH1B. Jumpers can be used to set up the first six relay circuits for either driving external solenoids or dry, Form-C contact outputs. For field solenoid power, a standard 125 V dc or 115 V ac source, as well as an optional 24 V dc source, can be offered with individual jumper selectable fuses and onboard suppression. The subsequent five relays (7â11) have separated Form-C contacts that are not powered. An isolated Form-C contact is used on output 12 for particular applications like ignition transformers.
VCRC OPTION
The VCRC board is functionally equivalent to the VCCC board, however, it only requires one VME slot because no daughter board is needed. The TBCI boards' contact inputs are received by two front panel connections, J33 and J44. Similar to VCCC, relay outputs on TRLY connect to the J3 and J4 ports on the VME rack. VCCC can be used in place of cable placement on the front panel if it is undesirable.
INSTALLATION OF IS200VCRCH1B BOARD
OPERATIONS OF IS200VCRCH1B BOARD