M.:
Date: Feb. 98
Page: 16
Vacuum Leak Detector
VL - H9
SGB
Sicherungsgerätebau
GmbH
57076 Siegen
No. in the operating unit
Designation in ME-MV-...
Meaning
1
1 A1
Alarm contact
2
2 N
Voltage supply
3
3 L1
Voltage supply pump
4
4 L2
Voltage supply solenoid v.
5 PE
Earth conductor
Table 3: Connection VL-H9/A-MV-Ex
(3)
Each channel occupied by an operation unit in the central signalling unit
must be activated via the relevant coding bridge.
In the case where an occupied channel is not activated via the coding bride, the
operational lamp does not light up, and no alarm is indicated.
The pump running indication functions independently of the activation.
(4) If the connection line is laid underground in a sheath-pipe, the inlet and the outlet of the sheath-
pipe must be closed in a gastight manner, in order to prevent explosive vapours from being
'carried over'.
6.6 Connection of another SGB leak detector to the central signalling unit
(1) It is possible to connect other leak detectors that are not explosion-proof to the central signalling
unit VL-H9/ZME, in order to obtain a central alarm and pump running indication.
(2) Such connection presupposes that the leak detector has a potential free contact that opens in the
case of an alarm. The power consumption of the leak detector with connected external signal
must not exceed 150 VA.
(3) The leak detector is connected to the central signalling unit only. An additional connection of the
leak detector to the network is not necessary since the voltage is supplied via the central
signalling unit.
(4) Requirements of the line:
Colour of the outer sheath: grey (other colours except blue are possible)
No. of wires:
5 (4 + PE) (the wires should be distinguishable, one wire as
earth conductor green / yellow)
Cross section:
1 - 1.5 mm²
(5) 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.
(6) The leak detector is connected to the following terminals of the central signalling unit:
2
In the case where the leak detector has a separate voltage supply, the potential free contact can be led to the ZME. In such case,
however, the pump running indicator does not function.
OFF
ON
Coding bridge
22 von 50
