VEGA VEGATROL 10 Ex 1 - Manual (Page 12)

VEGATROL 10 Ex 1 12
2 Technic Information
2.6 Mounting instructions and
regulations
General instruction for electrical connection
The electrical connection is made acc. to the wiring dia-
gram on page 12 and 13 or acc. to the type plates on the
instruments. The voltage stated on the type plate of the
signal conditioning instrument must correspond with the
value of the power supply.
Coding
A mechanical coding in form of a pin in the multipoint
connector and a hole in the multiple plug ensures that only
one Ex-instrument can be placed in one Ex-module
(carrier or housing).
In case of connection of a sensor installed in the Ex-area it
must be ensured that VEGATOR 526 W Ex (see figure) is
provided with a coded key in the respective position.
Ex-modules of Messrs. VEGA are supplied with plugged in
coded key.
- If strong electromagnetic interferences have to be
expected, screened cable is recommended.
- If there is a danger of overvoltages, overvoltage
arresters are recommended. Observe the respective
TIB for connection.
- Connected systems must correspond to VDE 0100 part
725 (auxiliary circuits).
- If screened cable is used, the screening should be
earthed at one end. The earth must be realized on the
sensor.
- The respectively valid Ex-regulations as well as the
special conditions in the conformity certificate must be
observed.
Ex-mounting regulations
The VEGATOR 526 W Ex signal conditioning instrument
and the signal conditioning instrument for the capacitive
measuring electrode must be installed generally outside
hazardous areas (or special Ex-protective measures must
be taken).
Installation into carrier (DIN 41 494 part 5)
VEGATOR 526 W Ex must be installed such that a
protection of min. IP 20 (acc. to IEC 144 (529)) is reached.
This is ensured with carrier type 596 Ex. It must be
furthermore observed that a min. distance of 50 mm is
kept between intrinsically and not-intrinsically safe circuits.
This can be realized by adding a separation (included in
"VEGA-module"). The required air gaps and creeping
distances between the instruments in the carrier must be
maintained. Observe therefore EN 50 020, especially
schedule 2, modification 2. The following instructions are
valid with e.g. a voltage of 250 V AC, 50 Hz (corresponds
to a peak value of 375 V) in neighbouring instruments:
- Between the left carrier wall and VEGATOR 526 W Ex a
distance of 2 TE must be maintained.
- If a power supply unit VEGASTAB 592 or 593 is used,
observe the mounting instructions in the TIB of the
carrier.
- If VEGATOR 526 W Ex is mounted together with not-
Ex-instruments or instruments of other manufacturers in
a carrier, a min. distance of 2 TE must be maintained to
these instruments.
- This min. distance is not required if the VEGA-
instrument (10 TE width) on the left of VEGATOR
526 W Ex is provided with a black cover on its right
side.
Installation into housing type 589 - 10 Ex
In case of installation of VEGATOR 526 W Ex into housing
type 589 - 10 Ex the distances between intrinsically and
not intrinsically safe circuits must be maintained.
General mounting and installation regulations
- The wiring between signal conditioning instrument and
sensor can be made with standard cable suitable and
marked for intrinsically safe circuits.
- Line resistance, max. permissible outer inductance and
capacitance, see technical data page 6 to 8.
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Coding on the multipoint connector
(view)
Coded key here