Manaras Opera MGT - Page 34

34
Advanced
Opened Limit
i
Opened Limit
Switch
A
dvanced
Closed Limit
i
Closed Limi
t
Switch
Open Cam
Cam Retaining
Plate (under
cam shaft)
Close Cam
Limit Switch
Lever
CONNECTION OF A REVERSING EDGE DEVICE
IMPORTANT NOTE: IF THE DOOR IS CONTROLLED BY ANY DEVICE OTHER THAN A CONSTANT
PRESSURE PUSH-BUTTON STATION, A REVERSING EDGE MUST BE CONNECTED.
CAUTION: CONNECT REVERSING DEVICE APPROPRIATE TO INSTALLATION.
Connection and installation of a reversing edge device is provided with the edge (see also Figure 25). Any such device
that uses a normally open contact may be connected to terminals 3 and 6 on the low voltage terminal block (Figure 24).
When the door comes in contact with an object during downward travel, the circuit will cause the motor to reverse the
door to the fully open position. In addition, there is a cut-off limit switch (advanced close limit switch) that will de-activate
the reversing edge during the last few inches of the door's downward travel.
Fi
g
ure 25 Reversing Edge
9.3 LIMIT SWITCHES
WARNING
TO AVOID THE DANGER OF POSSIBLE DAMAGE TO THE DOOR AND OPERATOR, LIMIT SWITCHES MUST
BE ADJUSTED TO THEIR APPROXIMATE POSITIONS BEFORE MANUALLY OPERATING THE DOOR OR
BEFORE APPLYING POWER TO THE OPERATOR.
• There are 4 limit switches. Two are used as end of travel, one is for radio-control or one-button operation and one
is for reversing devices. These switches are activated by the rotary cams travelling on a threaded shaft (Figure 26)
• The Open limit switch is the end of travel in the open position. Adjust the cam so that the door stops in the open
position at the desired location.
• The Advanced Open limit switch is used for radio-control and for a one-button (open/close) feature. This limit
switch is set to be activated slightly before the "Open" limit switch when opening.
• The Close limit switch is the end of travel in the closed position. Adjust the cam so that the door stops in the
closed position at the desired location.
• The Advanced Close limit switch is used in the operation of the reversing edge or other reversing devices. This
limit switch deactivates any reversing devices slightly before the door reaches its closed position to prevent the
door from reversing when fully closed.
Fi
g
ure 2
6
Limit switches
Open Limit switch
Cam Retaining Plate
(under cam shaft)
Open cam
Advance open
Limit switch
Limit Switch
Lever
Advance close limit
switch
Close Limit switch
Close cam
Reversing edge
location