Pfeiffer Vacuum CENTERONE Instructions D'installation page 11

RELAY terminal (Cen-
terTwo / CenterThree)
Fig. 13: Sub-D connector
The switch functions and the error monitoring influence the position of various relays.
The relay contacts can be used for switching via the RELAY terminal. The relay contacts
are isolated.
Dangerous contact voltage
Voltages above 30 V AC or 60 V DC are deemed to be dangerous in the event of contact
in accordance with EN 61010.
 Only apply a grounded protective extra-low voltage (PELV).
 Connect peripheral components with a shielded connecting cable (electromagnetic
compatibility) to the RELAY terminal on the back of the device.
Pin assignment and contact positions
The pins on the 25-pin sub-D socket are assigned as follows:
Pin Signal
Switch function 1
4
5
6
Switch function 2
8
9
10
Switch function 3
11
12
13
Switch function 4
16
17
18
Switch function 5
19
20
21
Switch function 6
22
23
24
Error signal
3
15
14
DANGER
Pressure higher than
threshold or device
switched off
Pressure higher than
threshold or device
switched off
Pressure higher than
threshold or device
switched off
Pressure higher than
threshold or device
switched off
Pressure higher than
threshold or device
switched off
Pressure higher than
threshold or device
switched off
Error or device switched off
Installation
Pressure lower than
threshold
Pressure lower than
threshold
Pressure lower than
threshold
Pressure lower than
threshold
Pressure lower than
threshold
Pressure lower than
threshold
No error
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