GA09037_002_C0
– 09/2016
19
5.3.3
Earthing
With the aid of the earthing screw (
Figure 7, B, page 18) the multichannel gauge can
be connected to the protective ground of the vacuum chamber.
NOTICE: Earthing
Connect the Earth connection on the vacuum chamber by means of a
protective earth conductor to the earthing screw on the instrument
5.3.4
Sensor
The connection marked Sensor serves the purpose of connecting sensors. For each
measurement channel an 8-way modular socket is available. (
Figure 7, E, F, G, page
18 and Figure 8, page 19).
Figure 8
–
Connector Sensor (modular socket, 8-way)
1
+24 V DC
2
Power ground
3
Signal
4
Ident resistant
5
Signal ground
6
Status (for PTR)
7
HV on (for PTR)
8
not available
CAUTION: Impermissible Sensors.
Connecting sensors which have not been designed to be operated in
connection with the multichannel gauge or which do not comply with current
EMC guidelines can impair operation of the instrument or even damage it.
Always operate the multichannel gauge with approved sensors.
Chapter
3.2 Suitable Sensors, page 10 .
Connecting:
Measurement channel 1, 2 and/or 3: Connect of the sensor using a shielded straight
through cable to the connection CH1, CH2 and/or CH3.
5.3.5
Relay
The switching functions and the ready monitor influence the switching action of various
relays within the multichannel gauge. Through the connection marked Relay (
7, D, page 18 and Figure 9, page 19) you may utilise the relay contacts for switching
purposes. The relay contacts are floating.
Figure 9
–
Connector
Relay (plug-in terminals, screw terminals)
1 SP 1 Normally closed contact (NC)
2 SP 1 Common contact (COM)
3 SP 1 Normaly open contact (NO)
4
SP 2 Normally closed contact (NC)
5 SP 2 Common contact (COM)
6 SP 2 Normaly open contact (NO) or Ready contact
DANGER: Dangerous voltage
Voltages exceeding 60 VDC or 30 VAC are dangerous when touched. You
may only switch at the connector marked Relay Output voltages of 30 VDC or
30 VAC with a maximum current of 1 A. The voltage must comply with the
requirements of a safety extra-low voltage (SELV-E in accordance with EN
61010).