Connecting To Power Supply; Preparing The Connection; Wiring Plan - Vega EL 4 Operating Instructions Manual

Note safety instructions
Voltage supply
Connection cable
Connection compartment
Line monitoring with
VEGATOR 131, 132, 631,
632
Conductive probe EL 4 •
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.
You can find the electrical connection of EL 4 in the operating
instructions manual of the corresponding signal conditioning instru-
ment.
You can find suitable signal conditioning instruments in chapter "Tech-
nical data".
The instrument is connected with standard two-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.
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.
5.2

Wiring plan

You can find the electrical connection of EL 4 in the operating
instructions manual of the corresponding signal conditioning instru-
ment.
The line break monitoring is required for probes with approval accord-
ing to WHG (WRA) or Ex.
The line break monitoring or alarm function defines the function of the
signal conditioning instrument in case of failure.
To realize line break monitoring with the signal conditioning instru-
ments VEGATOR 131, 132, 631 and 632, a supplementary electron-
ics must be mounted in the connection housing of the probe.
The supplementary electronics for line break monitoring is available in
two different versions differing optically in the cable colours.
•
Cable colour red - in conjunction with a VEGATOR 632 signal
conditioning instrument
•
Cable colour blue - in conjunction with a VEGATOR 131, 132, 631
signal conditioning instrument
5 Connecting to power supply
11