Instructions for Use SS 20.261
Page 13
Wiring of analog outputs
Both analog outputs signalizing flow and temperature of the medium are
designed as 4 … 20 mA current interface which exhibits permanent
short-circuit protection against both rails of the operating voltage U
B
.
R
L
GR
WH
+
-
BR
A
C
L
1µF
U
B
+
Figure 5
The apparent ohmic resistance R
L
of max. 300
must be connected
between the signal output and GND (see Figure 5). Load capacity C
L
is
limited to a maximum of 10 nF.
5 Signalization
Light emitting diodes
The sensor is equipped with 2 light emitting diodes (LED) indicating its
functional state.
Operating state
LED 1
LED 2
Supply voltage too low
Ready for operation
Supply voltage too high
Medium temperature beyond specification range
Sensor defective
LED off
LED flashes (approx. 2 Hz): green
LED on: green
LED flashes (approx. 2 Hz): red
LED 1
LED 2
Flow
