Vaisala WINDCAP WMT700 Series - Powering; Table 27 Pin-Out for 17-Pin M23 Connector

Table 27 Pin-Out for 17-Pin M23 Connector
Pin Description RS-232 RS-422 RS-485 SDI-12
1 Operating Power Supply
2 Analog output AOUT2, Wind Direction
3 COM2 RS232Rx Rx– Rx– -
4 RS232Tx Tx– Tx– Data
5 Heater Power Supply
6 Heater Power Supply
7 Heater Power Supply Ground
8 Heater Power Supply Ground
9 COM1 (Service
Port)
RS-485-
10 COM1 and COM2 Communication Ports Ground
11 Operating Power Supply Ground
12 Analog Output Ground
13 Analog Output AOUT1, Wind Speed
14 COM2 - Tx+ Tx+ -
15 - Rx+ Rx+ -
16 COM1 (Service
port)
RS-485+
17 Reference Input for AOUT2 (simulated potentiometer)
Shield Enclosure Ground
4.10 Powering
WMT700 has separate power supply inputs for operating and heating power. The inputs are
usually connected to the same 24 VDC power supply unit, but special applications such as
battery operation or battery back-up may require separate supplies.
The operating power has one supply terminal and one ground terminal, while the heating
power has two supply terminals and two ground terminals allowing a higher supply current.
All supply ground terminals are internally connected to each other.
In a system setup with two separate power supplies, avoid ground potential
dierences
between the supplies. Connect the negative terminals together if necessary.
WMT700 User Guide M211095EN-H
76