RS-485 host
DC power supply
RS-485 +
RS-485 -
RS-485 common
+
-
Pin #1
Power supply
Pin #2
RS-485 -
Pin #3
Power GND
RS-485 common
Pin #4
RS-485 +
Pin #5
Probe
Figure 5 RS-485 wiring
Recommended maximum length of the RS-485 line is 30 m (98 ft).
4.3 HMP1 probe
112 [4.41]
162 [6.38]
Ø 25
[0.98]
M12/5
Ø 5
[0.20]
16
[0.63]
50 [1.97]
mm
[in]
Figure 6 HMP1 probe dimensions
Vaisala HUMICAPâ Humidity and Temperature Probe HMP1 is designed for ambient
measurement in indoor spaces. Its probe head and body are integrated into a single unit with
no cable between them. HMP1 can be directly connected to Indigo200 series transmitters to
form a single wall-mounted unit.
Chapter 4 – Installation
23