Chapter 4 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 89
Operation of Relays
Quantity For Relay Output
A relay monitors the quantity chosen for the relay output. Any of the
quantities available can be chosen.
Measurement-Based Relay Output
Modes
Relay Setpoints
When the measured value is in between the "above" and "below"
values, the relay is passive. When choosing lower value as "above"
value and higher value as "below" value, the relay is passive when the
measured value is not between the setpoints. You can also set only one
setpoint. See
below for illustrative examples of the
different measurement-based relay output modes.
