VEGA Conductive electrodes - Manual (Page 21)

Conductive measuring system 21
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a c
VEGATOR 532 Ex a20
c7 VEGATOR
c23 Ex-module
card
Mounting instructions
Instrument type coding Function coding
Ex-separating chamber
To ensure sufficient "Air and creeping
distances" an Ex-separating chamber must
be mounted for the measuring data inputs in
case of Ex-applications. First of all loop the
lines through the Ex-separating chamber and
connect the lines. When using a multipoint
connector type "Screw terminals" the lower
wall on the Ex-separating chamber must be
broken away acc. to the notches. Fasten the
Ex-separating chamber with the lower screw.
Note the operating instruction of the carrier.
Coding
To exclude interchanging of the module card
VEGATOR 532 Ex, the multipoint connector of
the housing or the carrier rail is provided with
pins and the multiple plug of the module card
with holes (mechanical coding).
A function coding with fixed coded pin
ensures that not-Ex and Ex-module cards
are not interchanged.
An instrument coding with the coded pins
attached to the housing or module ensures
that the signal conditioning instruments are
not interchanged.
Insert the two coded pins into the determined
holes of the multipoint connector.
Transparent cover
To protect the instrument against
unauthorized adjustment, the front plate of
VEGATOR 532 Ex can be provided with a
lockable transparent cover.
Mounting single housing type 505 Ex
The socket can be either screwed directly to
the mounting plate or plugged on a carrier
rail (TS 35 x 7,5 acc. to EN 50 022 or TS 32
acc. to EN 50 035).
Connect the terminals of the basic plate acc.
to paragraph "3 Electrical connection". Furt-
her information on mounting is stated in the
operating instruction of the housing.
Protection with Ex-applications
For Ex-applications a protection of IP 20 must
be maintained. Therefore cover the gaps or
not coordinated modules from the front by
appropriate blind covers.
on
2
VEGATOR
Blindcover