Vega VEGACAP 98, Руководство по эксплуатации

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5 Connecting to power supply
VEGACAP 98 • Relay (DPDT)
33760-EN-230510
5 Connecting to power supply
5.1 Preparing the connection
Always keep in mind the following safety instructions:
Warning:
Connect only in the complete absence of line voltage.
•
The electrical connection must only be carried out by trained,
qualified personnel authorised by the plant operator.
•
Always switch off power supply, before connecting or disconnect -
ing the instrument.
Connect the voltage supply according to the following connection
diagrams. The electronics module CAP E31R is designed in protec-
tion class I. To maintain this protection class, it is absolutely neces-
sary that the ground conductor be connected to the internal ground
terminal. Take note of the general installation regulations.
The data for power supply are specified in chapter " Technical data ".
The instrument is connected with standard three-wire cable without
shielding. If electromagnetic interference is expected which is above
the test values of EN 61326 for industrial areas, shielded cable should
be used.
Make sure that the cable used has the required temperature resist-
ance and fire safety for max. occurring ambient temperature
Use cable with round cross-section. A cable outer diameter of
5 … 9 mm (0.2 … 0.35 in) ensures the seal effect of the cable gland.
If you are using cable with a different diameter or cross-section,
exchange the seal or use a suitable cable gland.
Note:
When placing the housing cover, make sure that the inspection glass
is above the signal lamp of the electronics module.
5.2 Wiring plan - single chamber housing
We recommend connecting VEGACAP 98 in such a way that the
switching circuit is open when there is a level signal, line break or
failure (safe state).
The relays are always shown in non-operative condition.
The two relays (DPDT) work synchronously. Hence it is possible to
control also e.g. a horn and a magnet valve.
Note safety instructions
Voltage supply
Connection cable
Wiring plan