VEGA VEGACAP 27 - Relay (DPDT) - Manual (Page 12)

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5 Connecting to power supply
VEGACAP 27 • - Relay (DPDT)
33758-EN-130916
5 Connecting to power supply
5.1 Preparing the connection
Always keep in mind the following safety instructions:
•
Connect only in the complete absence of line voltage
Connect the operating voltage 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
screen. If electromagnetic interference is expected which is above the
test values of EN 61326 for industrial areas, screened cable should
be used.
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 27 in such a way that the
switching circuit is open when there is a level signal, line break or
failure (safe condition).
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.
2 3 4 5 6 7
+
L1
–
N
8 1
1
2
3
Fig. 5: Wiring plan
1 Relay output
2 Relay output
3 Voltage supply
Note safety instructions
Voltage supply
Connection cable
Wiring plan