Vega VEGADIS 82 User Manual

14
5 Connecting to power supply
VEGADIS 82 • 4 … 20 mA/HART
45300-EN-240516
5 Connecting to power supply
5.1 Preparing the connection
Always keep in mind the following safety instructions:
•
Carryoutelectricalconnectionbytrained,qualiedpersonnel
authorised by the plant operator
•
If overvoltage surges are expected, overvoltage arresters should
be installed
Warning:
Only connect or disconnect in de-energized state.
Power supply and current signal are carried on the same two-wire
cable.Thevoltagesupplyrangecandierdependingonthesensor
version.
Thedataforpowersupplyarespeciedinchapter"Technical data".
Note:
Power the instrument via an energy-limited circuit (power max. 100 W)
acc. to IEC 61010-1, e.g.
•
Class 2 power supply unit (acc. to UL1310)
•
SELV power supply unit (safety extra-low voltage) with suitable
internal or external limitation of the output current
Keepinmindthefollowingadditionalfactorsthatinuencetheoperat-
ing voltage:
•
Output voltage of the power supply unit can be lower under nomi-
nal load (with a sensor current of 20.5 mA resp. 22 mA in case of
fault signal)
•
Voltage loss on the VEGADIS 82 (see supply circuit in chapter
"Technical data")
Youcanndinformationontheloadresistanceinchapter"Technical
data", (voltage supply of the respective sensor)
The instrument is connected with standard two-wire cable without
shielding. If electromagnetic interference is expected which is above
the test values of EN 61326-1 for industrial areas, shielded cable
should be used.
We generally recommend the use of shielded cable for HART mode.
Usecablewithroundcross-section.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.
Youcanndanoverviewofthecableglandsinchapter"Technical
data".
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.
Safety instructions
Voltage supply
Connection cable
Cable glands

Vega VEGADIS 82 Specifications

General

Brand	Vega
Model	VEGADIS 82
Category	Monitor
Language	English