Vaisala WXT510 User Manual

Page 40

User’s Guide ______________________________________________________________________

38 __________________________________________________________________ M210470EN-D

0505-204

Figure 16

Screw Terminal Block

Table 1

Screw Terminal Pin-outs for WXT510 Serial
Interfaces and Power Supplies

Screw Terminal
Pin

RS-232

SDI-12

RS-485

RS-422

1 RX-

Data-

Data in (RX-)

2 RX+

Data+

Data in (RX+)

3 TX-

Data out (TxD)

Data in/out (Tx)

Data-

Data out (TX-)

4 TX+

Data+

Data out (TX+)

5 RXD

Data in (RxD)

Data in/out (Rx)

6 SGND

GND for data

17 HTG-

GND for Vh+

18 HTG+

Vh+ (heating)

19 VIN-

GND for Vin+

20 VIN+

Vin+ (operating)

NOTE

In the true SDI-12 mode the two Data in/out lines must be combined
either in the screw terminal or outside WXT510.

NOTE

Short-circuit jumpers are required between pins 1-3 and 2-4 for the
RS-485 communication mode. For the RS-422 mode, the jumpers
should be removed. In the other modes the jumpers may stay or they
can be removed.