GHM Delta OHM PMBsense-A, Operating Manual

Page: 7 / 26

PMsense
- 7 -
V1.0
Current analog output (only PM[B]sense-A):
By default, the current analog outputs are 4…20 mA, with:
4 mA = 0 ppm
20 mA = 1000 µg/m
3
The analog output 1 is associated by default to PM2.5. The analog output 2 is associ-
ated by default to PM10.
With the commands of the proprietary protocol it is possible to associate the analog
outputs to different parameters, set the range 0…20 mA for the output and reverse the
direction of the output, so that the output decreases as the measurement increases.
In case of measurement error, the output goes to 22 mA.
I
0/4...20 mA
OUT1
+
-
R
L
I
0/4...20 mA
OUT2
+
-
R
L
SGND
AOUT1
GND
+Vdc
+
-
AOUT2
Fig. 3.4: current analog outputs connection
Voltage analog output (optional, only PM[B]sense-A):
By default, the voltage analog outputs are 0…10 V, with:
0 V = 0 ppm
10 V = 1000 µg/m
3
The analog output 1 is associated by default to PM2.5. The analog output 2 is associ-
ated by default to PM10.
With the commands of the proprietary protocol it is possible to associate the analog
outputs to different parameters, set the range 2…10 V for the output and reverse the
direction of the output, so that the output decreases as the measurement increases.
In case of measurement error, the output goes to 11 V.
+
-
R
L
+
-
R
L
SGND
AOUT1
V
0...10 V
OUT1
V
0...10 V
OUT2
GND
+Vdc
+
-
AOUT2
Fig. 3.5: voltage analog outputs connection
Power supply 12…30 Vdc
R
Lmax
= 500
Ω
CPM12-8DA… cable
Power supply 15…30 Vdc
CPM12-8DA… cable
R
Lmin
= 10 k
Ω