Vaisala Indigo200 - Configuring Relays; Relay Configuration Overview; Figure 17 Relay Configuration Options (CO 2 Probe Example)

6. Configuring relays
6.1 Relay configuration overview
Indigo200 transmitters have 2 configurable relays (relay A and relay B). Both relays have
configuration options for selecting the parameter that is used to control the relay, activation
triggers, hysteresis, and error state behavior.
1
2
3
4
5
6
Figure 17 Relay configuration options (CO
2
probe example)
1 Relay output on/o: Set to ON to enable relay output.
2 Output parameter: The measurement that is used to control the relay. Options vary based
on the type of the connected probe.
3 Activate above:
When the measurement value exceeds the value set here, the relay activates.
See the dierent relay activation options described in Figure 20 (page 36).
4 Activate below:
When the measurement value falls below the value set here, the relay activates.
See the dierent relay activation options described in Figure 20 (page 36).
5 Hysteresis: Define a buer value for relay deactivation (set the value according to the
parameter selected for the relay). With hysteresis, an activated relay switches o only
when the measured value crosses the relay activation/deactivation limit and the additional
buer value.
6 Error output state: Select which state the relay is set to when an error occurs (on, o, or
remains in its current state).
Chapter 6 – Configuring relays
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