INFICON LDS3000 Modular Leak Detector - Manual (Page 20)

20 Installation
5.4 Connection of the connection block
1 Connect PIRANI gauge and backing pump to G ROSS /F OREPUMP .
2 Connect the test leak to the second available flange of the vacuum connection.
For the unit to operate correctly upon opening of the sniffer valve, no additional line
can be connected between the connection block and the sniffer valve or between the
sniffer valve and the sniffer line.
3 Connect the sniffer line to F INE .
5.5 Connecting the MSB box
Information The connections are close together. To make installation easier, first
connect the inner connections, then the outer ones.
1 Connect the 24 V power cable to the included plug (connections: +24 V to 1+ and
GND to 1-).
2 Plug in the mounted plug of the 24V power supply cable in 24VDC.
3 Use the data cable to connect the control unit to C ONTROL U NIT as needed.
4 Use the data cable to connect the I/O or bus module to I/O as needed.
5 Connect the PIRANI gauge and the test leak to the cable of socket 1.
6 Connect the sniffer line to S NIFFER as needed.
7 Connect the gas ballast valve to O UTPUT as needed.
Material damage if power supply pack has the wrong specifications or is
connected improperly
A power supply pack that has the wrong specifications or is connected improperly
can destroy the unit.
► Use a suitable power supply pack:
– Use a power supply pack that supplies an output voltage with electrically
protective separation
– Output voltage: 24 V +/-10%
– Current rating: min. 8 A
► If the short-circuit current of the power supply pack is > 10 A, connect a fuse
between power supply pack and mass spectrometer module.
► Use a power cable with a large enough cross section.