Operating instructions

5.2 Connection procedure
Tip:
Before the actual setup, each HART sensors must be
assigned an address (see chapter "Setup"). When assigning
an address, only one sensor should be connected to
VEGAMET 625. Depending on the installation location of the
sensors, it can be advantageous to carry out this addressing
before installing and connecting the sensors. This can be
conveniently carried out e.g. in the workshop. You just need a
24 Volt power supply as well as an indicating and adjustment
module PLICSCOM or the adjustment software PACTware™
with VEGACONNECT.
Move to electrical connection and proceed as follows:
1 Snap the socket without VEGAMET 625 onto the carrier
rail
2 Connect sensor cable to terminal 1/2 (active input) or 3/4
(passive input), provide a screening
3 When using several sockets, loop the power supply by
means of bridges
4 Connect power supply (switched off) to terminal 17 and 18
5 If necessary, connect relays or other outputs
6 Insert VEGAMET 625 into the plug-in socket and screw it
down tightly
The electrical connection is finished.
Before setting up Ex versions, make sure the Ex separating
chamber is plugged onto the left side of the housing (above the
sensor terminals). The pins for type and Ex coding must also
be inserted correctly.
Information:
l On the active input (terminals 1/2), VEGAMET 625
provides the power supply for the connected sensors.
Power supply and measured value transmission are
carried out via the same two-wire cable. This operating
mode is intended for sensors without separate power
supply (sensors in two-wire version).
l On the passive input (terminals 3/4), the sensors are not
powered, only the measured value is transmitted. This
input is for connection of transmitters with their own,
VEGAMET 625 - Double channel H art signal conditioning instrument 13
Connecting to power supply
28970-EN-050616