USER'S GUIDE____________________________________________________________________
26 __________________________________________________________________ M211372EN-B
Wiring
CAUTION
The power supply lines are internally connected. You can use either one
of them, but do not connect more than one supply voltage in permanent
installations. Temporary simultaneous use with the USB service cable or
DM70 handheld dewpoint meter (which also provide power) is OK.
Table 4
Connector Pinouts
Pin Connector I
Connector II
Wire color
1
VDC
VDC
Brown
2 Ch1+
RS-485
D0-
White
3 GND
GND
Blue
4 Ch2+
RS-485
D1+
Black
1109-034
Figure 11
Connectors I and II
＋
−
1 = VDC+
Vs
3 = GND
4 = CH2+
2 = CH1+
V/mA
V/mA
15 ... 28 VDC (V out)
21 ... 28 VDC (mA out)
Vs =
2
4
1
3
15 ... 28 VDC
RS-485 +
RS-485 -
GND
+
-
1
2
3
4
2
4
1
3
1109-035,
1109-036
Figure 12
Connector Pinout
