Endress+Hauser Prosonic S FMU95, Руководство по эксплуатации

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Wiring Prosonic S FMU95
24 E Hauser
4.6 Synchronization line
• If wiring several Prosonic S (FMU90/FMU95)
which are mounted in a common cabinet and
if the sensor cables run in parallel, the
synchronization terminals (39 and 40) must
be interconnected.
• Up to 20 instruments can be synchronized in
this way.
• The synchronization causes the evaluation
units FMU9x to send the pulses
simultaneously. Only after all sensors have
received their signal, new simultaneous pulses
are sent. This prevents pulses in the sensor
cable of one sensor from influencing the
received signal on the cable of a different
sensor.
• If there are more than 20 instruments, groups
must be formed, each containing a maximum
of 20 instruments. For the instruments within
each group, the sensor cables may run in
parallel. The sensor cables of different groups
must be seperated from each other.
• Usual commercial screened cable can be used
for synchronization
– max. length: 10 m (33 ft) between the
individual instruments
– cross section: 2 x (0.75 to 2.5 mm
2
(18 to 14 AWG))
– for lengths up to 1 m (3.3 ft), an unscreened
cable can be used; for lenghts exceeding
1 m (3.3 ft), screening is required. The
screen must be connected to ground
• Instruments of the Prosonic FMU86x family
can be connected to the synchronization line
as well. In this case a maximum of 10
instruments can be connected to each
synchronisation line.
L00-FMU90xxx-04-00-00-xx-004
L00-FMU90xxx-04-00-00-xx-017
Prosonic S
FMU90/95
39 40
1 2 3 20 … …
FMU90 FMU90 FMU90
Prosonic S
FMU90/95
39 40
Prosonic S
FMU90/95
39 40
Prosonic S
FMU90/95
39 40
Prosonic
FMU860/861/862
63 64
1 2
10
… …
FMU90
V H