Vega VEGAFLEX 86 - Connecting to power supply; Preparing the connection

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5 Connecting to power supply
VEGAFLEX 86 • Probus PA
44232-EN-160518
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.
The voltage supply is provided by a Probus DP /PA segment coupler.
The voltage supply range can dier depending on the instrument
version. You can nd the data for voltage supply in chapter "
Technical
data".
Connection is made with screened cable according to the Probus
specication. Power supply and digital bus signal are carried over the
same two-wire connection cable.
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.
Please make sure that your installation is carried out according to the
Probus specication. In particular, make sure that the termination of
the bus is done with appropriate terminating resistors.
You can nd detailed information of the cable specication, installa-
tion and topology in the "
ProbusPA-UserandInstallationGuide-
line" on www.probus.com.
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.
With plastic housing, the NPT cable gland or the Conduit steel tube
must be screwed without grease into the threaded insert.
Max. torque for all housings, see chapter "
Technicaldata".
Safety instructions
Voltage supply
Connection cable
Cable glands