Wiring; Standard Wiring (Non-Isolated Rs-485); Alternate Wiring For Power Supply - Vaisala DPT145 Guide Rapide

QUICK GUIDE ____________________________________________________________________

Wiring

12 __________________________________________________________________ M211369EN-B

Standard Wiring (Non-Isolated RS-485)

Connect supply voltage and RS-485 to port II. Port I does not need to be
used at all, and can remain covered.
1
2
4
2
3
1 3
4
Wire Colors for Vaisala Cables
Pin Connection on Port I
1 VDC supply+
2
3 GND
4
Note the following:
- The ground pin (pin 3) on both ports is internally connected to each
other and to transmitter chassis. The chassis connection is through a
1 MΩ resistor and a 40 nF capacitor that are connected in parallel.
- The frames of the M8 connectors are not connected to the chassis.

Alternate Wiring for Power Supply

If necessary, you can provide supply voltage using Port I, and only wire
RS-485 for Port II. Do not supply power from both ports.
2
4
1 3
SHIELD
Connection on Port II
VDC supply+
RS-485 D0-
GND
RS-485 D1+
1 = VDC+
3 = GND
+
15 ... 28 VDC
-
GND
RS-485 +
RS-485 -
Wire Color
Brown
White
Blue
Black
+
15 ... 28 VDC
-