IS200DTURH1A

IS200DTURH1A is a Compact Pulse Rate Terminal Board manufactured and designed by General Electric as part of the Mark VI Series used in gas turbine control systems. The Simplex Pulse Rate Input (DTUR) terminal board is a compact pulse-rate terminal board designed for DIN-rail mounting. The board accepts four passive pulse-rate transducers (magnetic pickups) for speed and flow measurement. It connects to the VTUR processor board with a 37-pin cable and a 15-pin cable. These cables are identical to those used on the larger TTUR terminal board. VTUR only accommodates one DTUR board.

Installation:

• Mount the plastic holder on the DIN rail and slide the DTUR board into place. DTUR boards can be stacked vertically on the DIN rail to conserve cabinet space.
• Connect the wires for the magnetic pickups directly to the terminal block, which has 36 terminals. Typically #18 AWG shielded twisted pair wiring is used.
• Two screws, 35 and 36, are provided for the SCOM (ground) connection, which should be as short a distance as possible.
• Connect DTUR to VTUR using the JR1 and JR5 connectors.

Operation:

• The DTUR includes onboard signal conditioning that is identical to that on the TTUR and can accept four magnetic pulse rate sensors.
• The VTUR contains the pulse frequency circuitry.
• Unlike TTUR, DTUR does not receive shaft current and voltage signals, bus voltage signals, or generator and bus voltage signals.
• For system diagnostics, two on-board ID chips identify the connectors and terminal board to VTUR.

Diagnostics:

• The JR1 and JR5 terminal board connectors each include an ID device that VTUR can query.
• The terminal board serial number, board type, revision number, and plug location are all encoded on a read-only chip called the ID device.
• A hardware incompatibility fault is produced when a mismatch is found during the chip reading process by VTUR.