IS200DTCIH1A

IS200DTCIH1A is a Simplex Contact Input with a Group Isolation Terminal Board manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Turbine Control Systems. The Simplex Contact Input with Group Isolation (DTCI) terminal board is a compact terminal board designed for DIN-rail mounting. The DTCI board has 24 contact inputs with a nominal excitation of 24 V dc and connects to the VCCC (or VCRC) processor board with a single cable. Two DTCI boards can be connected to the VCCC or VCRC for a total of 48 contact inputs. The terminal boards can be stacked vertically on a DIN rail to conserve cabinet space. Only a simplex version of this board is available.

INSTALLATION:

Mount the plastic holder on the DIN rail and slide the DTCI board into place. Connect the wires for the contact inputs directly to the terminal block. The Euro- Block type terminal block has 60 terminals and is permanently mounted on the terminal board. Typically #18 AWG wires are used. Two screws, 55 and 56, are provided for the SCOM (ground) connection, which should be as short a distance as possible. Six screws are provided for the 24 V dc excitation power.

OPERATION:

DTCI has the same functionality and onboard signal conditioning as TBCI, except they are scaled for 24 V dc. The input excitation ranges from 18 to 32 V dc, and the threshold voltage is 50% of the excitation voltage. The AC voltage rejection is 12 V rms. Contact inputs take 2.5 mA nominal current on the first 21 circuits, and 10 mA on circuits 22 through 24. Filters reduce high-frequency noise and suppress surgeon input near the point of signal entry. The discrete input voltage signals are cabled to the VC board (or VCRC), which passes them through optical isolators and transfers the signals over the VME backplane to the VCMI. The VCMI then sends them to the controller.