Installing Field Multiplexers - Fluke VIBRONET Signalmaster Installationsanleitung

24
Installation
Connect machines of unequal elec-
trical potential to different string
lines.
RE-
LIGHT
START
LOG-
STOP
BOOK
VIBRONET R
SIGNALMASTER
STRING No.

4.3 Installing field multiplexers

A field multiplexer (MUX) is an electric channel selector switch, that
is installed in the measuring chain between the sensors and the ba-
sic unit. Each MUX merges up to 9 sensor cables into one string line
thereby reducing the cable and installation costs of the CMS. Up to
three lines with six MUXs each can be connected per basic unit.
Observe the following points when installing the multiplexer:
- Install the multiplexer as near as possible to the measurement lo-
cation in order to minimize cable length and expense.
- Always isolate the multiplexer electrically, preferably on concrete
walls or other nonconductive material.
- Machines of unequal electrical potential (not connected to a com-
mon potential compensation circuit) must never be connected to
the same string line.
- Add additional multiplexers to the end of the string line.
Installation
STRING No.
• Select a suitable installation location.
Cable loop
Leave sufficient clearance below the fittings for approx. 30 cm of cable
loop.
• Drill four mounting holes for fastening the MUX (see '3.2 Dimensi-
ons', page 16).
• Fasten the MUX with four M8 bolts; use, if applicable, mounting
dowels and vibration dampers.
• Label each MUX housing with its 3 digit ID number determined by
the corresponding position in the network:
RE- LIGHT
START
LOG-
STOP
BOOK
VIBRONET
R
SIGNALMASTER
STRING No. STRING No.