Vaisala HMDW110 Kurzanleitung Seite 15

Wiring HMDW110 with RDP100 Remote Display Panel
HMDW110
8 T -
7 T+
6 HUM-
5 HUM+
4 Pwr+
3 Pwr -
2 RS485 -
1 RS485+
Figure 8 HMDW110 Wiring with RDP100 Remote Display Panel
You must always connect the humidity measurement current loop (HUM, terminals 5 and 6) to
power the transmitter. Connecting the temperature measurement current loop (terminals 7
and 8) is optional.
Connect the RDP100 remote display panel using terminals 1 ... 4. The HMDW110 series
transmitter provides both power and data to the RDP100.
Terminals 1 ... 4 shall be used only for connecting the RDP100 (optional) when
using the analog outputs. If the RDP100 is not used, terminals 1 ... 4 must be left
unconnected. Otherwise the analog outputs may output incorrect readings.
The GND input of the RDP100 must be connected only to terminal 3 of the
HMDW110 transmitter. It must not be connected to any local ground potential.
When using the RDP100 with HMDW110 series transmitters, do not connect the
Extpwr jumper to the RDP100 component board.
2 x 4 ... 20 mA
R = 0 ... 600 Ω
L
A
A
Power supply
-
10 ... 28 VDC
+
- Power supply
+
10 ... 28 VDC
RDP100
PWR+
GND
RS485+
RS485-
GND
ExtPWR+
15