7MF4232
Operating Instructions
16
C79000-B5676-C92-01
2.2
Electrical connection
!
Warning
The pertinent regulations must be observed for electrical installation; particularly in hazard-
ous areas.
.
the directive governing electrical systems in hazardous areas (Elex V)
.
the regulation for installing electrical systems in hazardous areas (VDE 0165) and
.
the certificate of conformity
Check whether the auxiliary power supply matches that specified on the rating plate.
The transmitter should be powered from a power source with SELV (safety extra-low voltage). If other
power sources are used, we recommend grounding the transmitter housing. The ground terminal on the
terminal side is connected with the external ground terminal.
.
Note
D
Sealing caps in the cable inlets should be replaced by suitable compression glands or blank-
ing plugs which must be certified for transmitters with flame--proof enclosure protection
type!
D
For laying the connecting cable (max. 1.5 mm
2
cross section)/signal cable it generally
applies that:
- the signal cable should laid separately from cables with voltages >60 V
- use cables with twisted pairs
- avoid the vicinity of large electrical installations or use screened cables
- full specification according to HART
R
Revision 5 only with screened cables
D
connection to screw terminals
- Unscrew the housing cover of the terminal side (marked ”FIELD TERMINALS” on the housing)
- Pull out the analog indicator if necessary
- Insert the connecting cable through the compression gland
- Connect wires at the terminals ”+” and ”--”, pay attention to the polarity!
- Insert analog indicator if necessary
- Screw in housing cover
.
Note
In transmitters for the protection type “flame-proof enclosure”, the housing cover must be
fastened with the safety angle.
