Multilin SR469 - Digital Input Function: Speed Switch Trip; Digital Input Function: Load Shed Trip; Digital Input Function: Pressure Switch Alarm

S3 DIGITAL INPUTS 4. SETPOINT PROGRAMMING
4-18
4.4.9 DIGITAL INPUT FUNCTION: SPEED SWITCH TRIP
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FUNCTION:
When this function is assigned to a digital input, the following will occur. When a transition from stopped to start is detected a timer will
be loaded with the delay programmed. If that delay expires before a contact closure is detected, a trip will occur. Once the motor is
stopped, the scheme is reset.
4.4.10 DIGITAL INPUT FUNCTION: LOAD SHED TRIP
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FUNCTION:
Once the Load Shed Trip function is chosen for one of the assignable digital inputs, the setpoint messages shown here will follow the
assignment message. A trip relay may be selected. A contact closure on the switch input assigned as Load Shed Trip will cause a trip
within 100 ms
4.4.11 DIGITAL INPUT FUNCTION: PRESSURE SWITCH ALARM
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FUNCTION:
Once the Pressure Switch Alarm function is chosen for one of the assignable digital inputs, the setpoint messages shown here will follow
the assignment message. The Pressure Switch alarm feature may be blocked for a specified period of time from a motor start. A value
of zero for the Block time indicates that the feature is always active, when the motor is stopped or running. After the block delay has
expired, the digital input will be monitored. If a closure occurs, after the specified delay, an alarm will occur.