Wiring
Power Supply Wiring
c. Tighten the terminal screws to secure the wires.
d. Plug the screw-terminal connector back into the corresponding on-
board connector.
6. When all connections are complete, close and secure the transmitter
cover.
Detector Type Selection
Three, two-pin headers (JP1, JP2, and JP3) are located along the edge of
the VPI board near the top of the board. A jumper should be installed on
one (and only one) of these headers to indicate the detector type as follows:
● JP1: Ion chamber detector
● JP2: Scintillation detector – SGD mode
● JP3: Scintillation detector – PRO mode
Caution Remove power from the transmitter before changing jumper
settings. Failure to do so may result in damage to the VPI board. ▲
Power Supply
Wiring
Power to the
Scintillation
Detector
When connecting power to the 9719B/ 9720B scintillation detectors, refer
to installation wiring diagram 868577.
Note To meet the requirements of CSA 1010.1, an external switch or
circuit breaker must be installed to allow the power source to be
disconnected from the gauge. In addition, protective bonding (grounding)
must always be provided, even if a DC power source is used. ▲
DC Power C Power
The 9719B/9720B scintillation detectors are designed to operate on 24
Vdc ± 20%. The input connector for the DC source voltage wiring is
located on the interface/ adapter board.
Note To meet the requirements of CSA 1010.1, the input DC terminals
shall be supplied from an SELV (Safety Extra Low Voltage) source. ▲
Connections are shown in the table below.
Thermo Fisher Scientific DensityPRO+ Installation Guide 4-7
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