Wiring
29
4.6 Connection of a temperature sensor
!
Note!
After connecting an external temperature sensor, the following is required:
1. The type of the connected sensor (Pt100 or FMT131) must be selected in "sensor
management/ext. temp. sensor" in the "sensor type" parameter.
2. The external temperature sensor must be assigned to an ultrasonic sensor in "sensor
management/FDU sensor/US sensor N" in the "temp. measurement" parameter.
!
Note!
If the option "alarm" has been selected for the case of an error in external temperature sensor, this
alarm is indicated by the alarm relay.
4.6.1 FMT131 (Endress+Hauser)
(connectable to FMU90-********B***)
L00-FMU90xxx-04-00-00-xx-019
A: Non-Ex area (FMT131-R); B: Ex area (FMT131-J) with grounding in the FMU90;
C: Ex area (FMT131-J) with crounding at a terminal box
BK: black; YE: yellow; YEGN: yellow-green
!
Note!
For details refer to the Operating Instructions KA019F.
83 84
BK YE
FMU90
85
YEGN
EX
EX
FMT131-J
EX
EX
83 84
BK
BK
YE
YE
YEGN
FMT131-J
FMU90
85
EX
EX
83 84
BK
BK
YE
YE
YEGN
FMT131-R
FMU90
85
A
C
B