5
How the EM SW EMO works
The swing door operator EM SW EMO uses a DC motor and a gear-reduction system to drive an
arm system, which opens the door. Closing power is provided by a motor and a clock spring. An
electronic control unit uses a motor encoder and a microprocessor to control the door’s movement.
5.1
Opening
When an opening signal is received by the control unit, the door is opened at the operator-adjusted
opening speed. Before the door is fully open at back check, it slows automatically to low speed.
The motor stops when the selected door opening angle has been reached. The open position is
held by the motor.
If the door is obstructed while opening, it will either stall or stop which can be selected with a DIP-
switch (SOS). Stop on stall is always active in program selector Mode Off.
• Continue on stall - the door will continue to try to open during the hold open time.
• Stop on stall - the door will, even if hold open time has not expired, close after 2 seconds.
5.2
Closing
When the hold open time has elapsed, the operator will close the door automatically, using spring
force and motor. The door will slow to low speed at latch check before it reaches the fully closed
position. The door is kept closed by spring power or combined with extended closing torque by
the motor.
5.3
Functions on the basic control unit CU-ESD
Also see page 50 for more information.
5.3.1
Power failure
During power failure the operator acts as a door closer with controlled closing speed.
5.3.2
Spring force
The operator is delivered with spring pre-tension factory set to 210°. If necessary, the spring tension
can be electronically adjusted with a potentiometer to required closing force.
5.3.3
Extended closing force/torque (CLTQ)
If the potentiometer CLTQ is set to 0°, the door will close with normal spring power. If the poten-
tiometer is turned clockwise, the motor will increase the closing force/torque.
5.3.4
Power assist (POAS)
If the potentiometer POAS is set to 0°, the door gives no power assist. If the potentiometer is turned
clockwise, the motor will give/increase power assist when the door is opened manually.
5.3.5
Push and go (PAG)
DIP-switch to select PUSH and GO, ON or OFF. PUSH and GO is available from any door position.
PUSH and GO is not active in programme selector setting OFF.
5.3.6
Overhead presence detector (OPD), frame mounted
When an OPD sensor is mounted on the frame or operator cover just above the swing side of the
door, it will–when activated–either keep the door open or closed. The sensor is not active during
opening and closing. Lock-out signal must be connected for proper function.
• a closed door will not open, if the OPD detects activity in the field
1005088-EMEI-11.0
Issue 2014-11-24
12
5 How the EM SW EMO works