Vega VEGASON 61 User Manual

21
5 Connecting to power supply
VEGASON 61 • Foundation Fieldbus
28790-EN-231026
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,
qualiedpersonnelauthorisedbytheplantoperator.
•
If overvoltage surges are expected, overvoltage arresters should
be installed.
Theinstrumentrequiresaoperatingvoltageof9…32VDC.Operat-
ing voltage and the digital bus signal are carried on the same two-wire
connection cable. Power is supplied via the H1 power supply.
Connection is carried out with shielded cable according to Fieldbus
specication.
Makesurethatthecableusedhastherequiredtemperatureresist-
anceandresafetyformax.occurringambienttemperature
Usecablewithroundcrosssectionforinstrumentswithhousingand
cablegland.Toensurethesealeectofthecablegland(IPprotection
rating),ndoutwhichcableouterdiameterthecableglandissuitable
for.
Useacableglandttingthecablediameter.
Makesurethattheentireinstallationiscarriedoutaccordingtothe
Fieldbusspecication.Inparticular,makesurethatthebusistermi-
nated with suitable terminating resistors.
Metric threads
In the case of instrument housings with metric thread, the cable
glands are screwed in at the factory. They are sealed with plastic
plugs as transport protection.
Note:
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory. The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection.
Note:
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
On plastic housings, the NPT cable gland or the Conduit steel tube
must be screwed into the threaded insert without grease.
Max.torqueforallhousings,seechapter"Technical data".
Safety instructions
Voltage supply
Connection cable
Cable glands

Vega VEGASON 61 Specifications

General

Brand	Vega
Model	VEGASON 61
Category	Measuring Instruments
Language	English