VACUUM LEAK DETECTOR
VLR ..
and
VLR .. MV
20/05/2020
- 22 -
5.6 Electrical Wiring Diagram
(1) Fixed wiring, i.e., no plug or switch connections.
(2) Observe the requirements for electric installations, if necessary,
also those of the electric companies.
(3) Terminal layout: (see also SL 854 851)
1/2
Power connection (100–240 V AC)
3/4
Occupied (vacuum pump)
5/6
External signal 24 V DC, can be disconnected
7/8 Solenoid
valve
70/71 Probe contacts; the potential-free contacts of a leak de-
tection probe can be connected here
11/12 Potential-free contacts (opened in case of alarm or loss
of power)
12/13 As above, but contacts closed
(17/18) Potential-free contacts, in parallel with pump running
(closed when pump is inactive and in case of loss of
power)
(18/19) As above, but contacts open
40/41 24 V DC as permanent power supply to power other as-
semblies or, for a device with a supply voltage of 24 V
DC, the power supply is connected here
(4) Do not apply voltage until all electrical and pneumatic cables are
connected and the housing cover is closed.
Mounting