Leak indicating unit
LAE
27/02/2020
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Note:
Due to the lower alarm priority for channel 3, it is recommended that
service equipment such as the dry filter monitoring be connected
here.
In addition, potential-free relay contacts are available on the leak indi-
cating unit itself for forwarding all three channels.
3.3.2 Use as an leak indicating unit for VLX .. A-Ex tools
VLX .. A-Ex type tools can be mounted within the Ex area and are
electrically connected to the leak indicating unit mounted outside the
Ex area.
A tool is connected to one leak indicating unit at a time. The leak indi-
cating unit is connected to the potential-free contacts of the tool via
the signal circuit, and the leak indicating unit additionally provides the
230 V AC power supply for the tool.
Note:
In general, it should be noted that VLX .. A-Ex tools are only connect-
ed to channel 1.
The other channels, 2 and 3, of the leak indicating unit remain un-
used.
For a connection diagram, the circuit diagram, and an installation ex-
ample, see Chap. 5.4 and 5.5.1.
3.3.3 Use as leak indicating unit for DL .. ELC FCM
At the leak detector DL .. ELC FCM, the alarm of the tank, the pipe-
line, and the service message are displayed when the dry filter is
used, which can also be transmitted potential-free by the leak detec-
tor.
The connection constellation to the leak indicating unit is:
Alarm of the tank potential-free on channel 1, alarm of the pipeline
potential-free on channel 2, and service message potential-free on
channel 3.
For a connection diagram, the circuit diagram, and an installation ex-
ample, see Chap. 5.4 and 5.5.2.
3.3.4 Use as central leak indicating unit for one or more leak detectors or leak detection probes
The leak indicating unit is used centrally for the connection of any
number of leak detectors and/or leak detection probes. For this pur-
pose, the potential-free contacts of the connected devices are con-
nected in series.
The connection is usually made on channel 1.
For a connection diagram, the circuit diagram, and an installation ex-
ample, see Chap. 5.4 and 5.5.3.
Technical Data
