Vaisala Drycap DMT152, User Manual

Page: 19 / 72

4.3.1 Output Noise Minimization Option
To minimize the output noise:
• Wire only the analog outputs (V/mA) to Port I
• Connect the power supply only to Port II
Avoid connecting the Port I and Port II grounds (pin #3) together
1
3
4
2
1
3
4
2
3
+
-
V/mA
4
+
-
V/mA
2
+
-
Vs
1
3
+ / A
4
2
RS485
- / B
Figure 5 Output Noise Minimization Wiring Option
The wiring of pinouts 1 … 4 in ports I and II in the output minimization option is described in
the following table.
Table 5 Output Noise Minimization Wiring Option Pinouts and Wire Colors
Pin Connector I Connector II Wire Color
1 Not wired VDC Brown
2 Signal Ch 1+ RS-485 - / B White
3 GND GND Blue
4 Signal Ch 2+ / LED RS-485 + / A Black
Chapter 4 – Installation
17