10
In operation, power is applied to the actuator only during the period when one of the contacts is closed. This
mode of operation is factory adjustable by S E Controls.
In the open direction, the actuator power is automatically timed off when a total period of 18 seconds (factory
adjustable) is exceeded.
In the close direction, the actuator power is automatically timed off when the controller believes the
actuator is closed. In practice due to start-up/ stopping delays in the actuators mechanics, this may not
coincide with the physical fully closed position. If this is the case, closing the DC connection again will
apply power in the close direction to the actuator but will time off after a period of 180 seconds (factory
adjustable) to guarantee the fully closed position is reached.
5.10Thermostat
For the thermostat input to operate correctly, ensure that the jumper on CN4 is set at 'T'.
Connecting T/A to 0V will open all attached actuators. Breaking the connection between T/A and 0V will
close all attached actuators.
In operation, the actuator power is automatically timed off after a period of 180 seconds (factory
adjustable). This is a sufficient length of time to ensure most actuators achieve their fully open or closed
position as required.
To prevent 'machine gun' operation of the actuators, all thermostat-controlled movements are subject to a
180 second (factory adjustable) lockout period, during which period other thermostat input changes are
ignored.
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