Electrical connection
Prosonic S FMU90 PROFIBUS DP
38
Hauser
Display
HART
0/4…20mA
Sync
Fuse
I
1
FDU-
Sensor
RD
1
1
BK
10
YE
9
40
39
5
4
6
7
8
Service
Relay
FMU90
L
N
POWER
3
2
1
BN
BU
RD
BK
YE
FDU90
FDU91
24 VDC
+
-
1
A0032575
32
Connection of the sensor heater via a metal DIN rail in the cabinet
1
External power supply unit
BN Brown wire
BU Blue wire
6.3.7
Synchronization terminal
Using the GSD files
The synchronization terminal must be used if the sensor cables of several transmitters are
routed in parallel. As a result of synchronization, a transmitter cannot receive signals
while another transmitter is transmitting signals. This prevents transmission and
reception signals from mutually influencing one another.
Number of transmitters that can be synchronized
• 20 (in the case of FMU90/FMU95)
• 10 (if synchronizing FMU90/FMU95 with FMU86x)
Procedure if synchronizing more than 20 transmitters
• Form groups with a maximum of 20 transmitters.
• For transmitters within a group, the sensor cables can run in parallel.
• The sensor cables of different groups must be separated from one another.