M.:
Date: Feb. 98
Page: 15
Vacuum Leak Detector
VL - H9
SGB
Sicherungsgerätebau
GmbH
57076 Siegen
(6) An additional external signal showing
failures can be connected to the
terminals AS1 and AS2 of the signalling
unit VL-H9ME, VL-H9/ME-MCV or VL-
H9/ME-MV-LS.
At the same time, the alarm can be
transmitted by using the potential free
contacts PK 23 and PK 24.
(7) When using the contacts 21, 22, 23 and 24, the voltage must not exceed 230V / 50Hz / 5A. The
terminals AS1 and AS2 are protected by the fine-wire fuse F2 (2.5 A quick-acting).
(8) The vacuum pump is protected by the fine-wire fuse F1 (1A quick-acting or semi time-delay).
For replacing the fuses, power to the leak detector must be switched off. The fuses in the leak
detector VL-H9-Ex shall only be replaced by the manufacturer.
6.5 Installation of the electrical connection line between operation unit and (central) signalling
unit
(1) Requirements of the line:
The line must be of the double insulated type.
Colour of the outer sheath: grey (other colours except blue are possible)
Outer diameter:
6 - 12 mm
No. of wires:
5 (4 + PE)
(the wires should be distinguishable, one wire as
earth conductor green / yellow)
Cross section:
1 - 1.5 mm²
(2) The connection line between the operation unit and the (central) signalling unit must be firmly
installed. Plug-in or switch-type connections are not permitted.
In the operation unit and in the (central) signalling unit, connection is made to the terminals
provided for this purpose.
No. in the operating unit
Designation in ME (ZME)
Meaning
1
1 A1
Alarm contact
2
2 A2
Alarm contact
3
3 N
Voltage supply
4
4 L1
Voltage supply
5 PE
Earth conductor
Table 2: Connection VL-H9/A-Ex
external alarm signal
potential free alarm contact
(not affected by cable failure)
VL-H9/ME
VL-H9/ME-MV
VL-H9/ME-MV-LS
AS2
PK 24
PK 23
AS1
21 von 50
