Connect-Tek Transa PRO 17 Instruction Manual download pdf (Page 74)

4.2.4.4.3. DA (De-energize above setpoint)

Used in applications where failsafe control of an Overspeed

condition is desired. Operation is as follows:

• If the monitored application is operating at a speed below

the setpoint, the relay is energized.

• If the speed increases beyond the setpoint value, the

setpoint enters the alarm condition and de-energizes the

relay.

• The relay will remain de-energized until the speed

decreases to a value below the reset point of the hysteresis

band at which point the relay is energized.

4.2.4.4.4. DB (De-energize below setpoint)

Used in applications where failsafe control of an

Underspeed condition is desired. Operation is as follows:

• If the monitored application is operating at a speed above

the setpoint, the relay is energized.

• If the speed decreases below the setpoint value, the setpoint

enters the alarm condition and de-energizes the relay.

• The relay will remain de-energized until the speed

increases to a value above the reset point of the hysteresis

band at which point the relay is energized.

A, EB, DA, DB switching modes use both Fixed and Variable Range Constants

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Connect-Tek Transa PRO 17 Instruction Manual Page 74