Mea Hawk - 4-4 Failure Modes & Limit Switches

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MEA Incorporated | Hawk Actuator Instruction and Operation Manual
02/2018 27
4-4 Failure Modes & Limit Switches
The Hawk behavior on loss of control signal and loss of main power can be configured by the user within
the Setup menu.
Loss of Control Signal
Upon loss of control signal the Hawk actuator can be configured to fail to one of four positions:
 Fail to the 4 mA Position
 Fail to the 20 mA Position
 Fail to a User Defined Position – The fail position is configured as a mA signal in the Fail to
Position field directly below the Loss of Control Signal dropdown
 Fail to the Last Position
Control Signal Recovery
If the control signal is lost, the actuator behavior upon restoration of that control signal can be configured
to one of two modes:
 Control – The actuator will return to the Control mode and move to the current control signal
 Standby – The actuator will remain in the Loss of Control Signal failure position and be placed
into Standby mode. The user will need to return to the Home screen and enter either the Control
or Manual modes to move the actuator.
Power Recovery
If main power is lost, the actuator behavior upon restoration of power can be configured to one of two
modes:
 Control – The actuator will return to the Control mode and move to the current control signal
 Standby – The actuator will remain in the actuator failure position and be placed into Standby
mode. The user will need to return to the Home screen and enter either the Control or Manual
modes to move the actuator.
Limit Switch Positions
High and low electronic limit switch positions may be set by the user.