Pfeiffer Vacuum CENTERONE Instructions D'installation page 7

S1
Earthing
1.4 Connections
Transmitter terminals
CH 1, CH 2 and CH3
10 A
max
Fig. 7: Mains cable with protective earth conductor
 Switch off switch S1 on the power pack (position "0").
 Connect the mains cable to the mains.
 Always ensure a safe connection to the protective earthing conductor (PE, protection
class I).
 To protect the unit in case of malfunction, carry out fuse protection in accordance with
the regional regulations.
– Select a fuse with slow characteristics.
If the unit is installed in a rack, the mains voltage must be supplied via a switched power
distributor.
On the rear side there is a screw to connect the CenterOne/CenterTwo/CenterThree via
a protective ground if necessary, for example, with the protective earthing of the pumping
station.
Fig. 8: Protective ground
There are two terminals wired in parallel available for each measuring channel.
● an 8-pin RJ45 socket (CH A)
● a 15-pin sub-D socket (CH B)
 Connect the transmitter using a preassembled measuring cable or with a self-manu-
factured, shielded cable (electromagnetic compatibility) to terminals CH 1, CH 2 or CH
3 on the back of the device.
X:
X
Installation
Do not unfasten this screw
(internal ground protection)
7