Relay Configuration In Rotary Switch Mode; Table 5 Rotary Switch And Relay Setpoint - Vaisala HMW90 Series User Manual

Chapter 3 _______________________________________________________________ Installation
NOTE
NOTE
VAISALA _______________________________________________________________________ 15
Relay Configuration in Rotary Switch
Mode
Relay is included on HMW93 transmitters only.
When the transmitter is configured using DIP switches, the functioning
of the relay is configured by DIP switch 5 and the rotary switch on the
component board:
- DIP 5 determines if the relay is closed above or below the setpoint.
- The position of the rotary switch determines the setpoint according to
the table below.
Table 5 Rotary Switch and Relay Setpoint
Rotary Switch Position
0
1
2
3
4
5
6
7
8
9
The rotary switch only has 10 positions. Do not turn the switch so that it
is between two positions.
For examples of relay behavior in rotary switch mode, see Figure 5 and
Figure 6 on page 16. Note also the following:
- Relay operation in rotary switch mode is always linked to RH
measurement.
- Relay contacts are open if the transmitter is in error state (an active
error is present).
- Relay contacts are open when transmitter is powered off.
If you need to configure the relay for some other quantity or need
additional configuration options, see section Relay Configuration in
Custom Mode on page 40.
Relay Setpoint
5 %RH
10 %RH
20 %RH
30 %RH
40 %RH
50 %RH
60 %RH
70 %RH
80 %RH
90 %RH