VEGA Housing type 505 - Manual (Page 6)

6 Housing type 505
Mounting
2 Mounting
2.1 General
Housing type 505 can be screwed directly
on to a mounting plate (see „Dimensions,
holes“) or placed on a carrier rail (35 x 15
acc. to EN 50 022). To do this, it is necessar y
to loosen the two screws on the front of the
housing and to remove the upper part of the
housing from the socket.
For placing on carrier rail or loosening from
the carrier rail, unlock the holding strap with a
screwdriver in the lower rectangular opening
of the socket.
Wire the terminals acc. to the connection plan
(see "3 Electrical connection" or the operating
instructions of the signal conditioning instru-
ment to be installed).
The designations of the terminals correspond
to those on the multipoint connector on the
rear of the signal conditioning instrument.
In case of Ex-applications, mark the sensor
connection terminals (bottom) on the housing
with the supplied blue Ex-labels (contents of
the supplied bag).
Holding strap (orange)
2.2 Coding with Ex-instruments
The multipoint connector of the housing type
505 must be provided with a coded pin (con-
tents of the supplied bag) to avoid inter -
changing between not-Ex and Ex-module
units.
In case of Ex-instruments, equip the
multipoint connector on position c23 with this
coded pin.
2.3 Transparent cover
The module units can be provided with a
lockable transpar ent cover to avoid unauthor -
ised adjustment.
The transparent covers are supplied along
with the module units.
2.4 Retrofitting of the housing with a
power supply unit
Proceed as follows to retrofit a power supply
unit:
- First of all make sure that the supply volt-
age is disconnected on the terminal strips
of the socket!
- Loosen the two hold screws on the front of
the housing and remove the upper part of
the housing (the hold screws are only
accessible when there is no module card in
the housing).
- Shift the power supply board into the guide
rails of the upper part of the housing. Note
the position of the connection plug.