User's Manual
Table Of Contents
- 1 About this document
- 2 For your safety
- 3 Product description
- 4 Mounting
- 5 Connecting to power supply
- 5.1 Preparing the connection
- 5.2 Connecting
- 5.3 Wiring plan, single chamber housing
- 5.4 Wiring plan, double chamber housing
- 5.5 Double chamber housing Ex d
- 5.6 Wiring plan, double chamber housing Ex d ia
- 5.7 Double chamber housing with DISADAPT
- 5.8 Wiring plan - version IP 66/IP 68, 1 bar
- 5.9 Switch-on phase
- 6 Set up with the display and adjustment module
- 7 Setup with PACTware
- 8 Set up with other systems
- 9 Diagnosis, asset management and service
- 10 Dismount
- 11 Supplement
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5 Connecting to power supply
VEGAPULS 69 • 4 … 20 mA/HART - two-wire
47247-EN-170315
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
personnel authorised by the plant operator.
•
If overvoltage surges are expected, overvoltage arresters should
be installed.
Power supply and current signal are carried on the same two-wire
cable.Theoperatingvoltagecandierdependingontheinstrument
version.
Thedataforpowersupplyarespeciedinchapter"Technicaldata".
Provide a reliable separation between the supply circuit and the
mains circuits according to DIN EN 61140 VDE 0140-1.
Keepinmindthefollowingadditionalfactorsthatinuencetheoperat-
ing voltage:
•
Lower output voltage of the power supply unit under nominal load
(e.g. with a sensor current of 20.5 mA or 22 mA in case of fault)
•
Inuenceofadditionalinstrumentsinthecircuit(seeloadvaluesin
chapter "Technicaldata")
The instrument is connected with standard two-wire cable without
screen. If electromagnetic interference is expected which is above the
test values of EN 61326-1 for industrial areas, screened cable should
be used.
Use cable with round cross section for instruments with housing and
cablegland.Toensurethesealeectofthecablegland(IPprotection
rating),ndoutwhichcableouterdiameterthecableglandissuitable
for.
Useacableglandttingthecablediameter.
Screened cable generally necessary in HART multidrop mode.
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.
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.
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
Safety instructions
Voltage supply
Connection cable
Cable glands