Manual No. 4801-5156 Rev 4-08
RollSeal SC-325 & SC-650
Page 18 of 44
Three Position
Operator Switch
8.1
Directional Switch Input
The directional switch input is primarily for use with a three
position direction switch similar to the one illustrated below.
Operation is simple. Momentarily push “OPEN” to open the door,
momentarily push “CLOSE” to close the door and momentarily
push “STOP” to stop the door. However, the SC-325 and SC-650
controller can be programmed to perform special events with these
directional switches.
For example, if the ‘STOP” button is pressed and held, the door
will remain in the stopped position. None of the other control
switches will operate as long as the “STOP” connection to the
controller is completed. Similarly, if the “OPEN” button is pressed
and held, the door will remain in the open position. And, if the
“CLOSE” button is pressed and held, the door will remain in the
closed position. These features would be useful if an operator
wanted to “lock” the door in a particular position with the use of
external switches connected in parallel with the directional switch.
For safety reasons, these directional buttons have a priority built
into the controller in case one or more of the buttons are closed at
the same time. The “STOP” switch has first priority, the “OPEN”
has second priority and the “CLOSE” has third priority.
8.2
Manual (Single) Switch Input
This switch provides a conventional means of connecting a single
button that responds to each momentary press sequentially. For
example, if the last movement of the door was in the open
direction and the manual input is made, the door will attempt to
close. Conversely, if the last movement of the door was in the
close direction and the manual input is made, the door will attempt
to open. If this single position manual switch is used with the
three position directional switch as discussed above, the manual
switch has fourth priority.
NOTE:
This input will be reconfigured for use with the Interlock circuit if the P4 setting is
programmed to anything other than zero. See Setting
P4
under
Section 6.1
for more
information.
8.3
Timed Switch Input
The timed switch is intended for auto closure of the door and is typically used with motion
detectors, floor loops, or pull cord switches. The timed feature would be used when, for example,
a vehicle ( i.e. forklift) would open the door by means of a floor loop. Then, after the door is
opened and all safety sensors are clear, a timer would count down and close the door
automatically. In order for the timed feature to work, the door must have initially been in a closed
or stopped position. If the door was already opened by some other means, the timer would not
operate and the door would remain open.
The timed switch has priority five when the door is in the idle mode. However, if the door is in
the process of closing, the timed input will act as a safety feature and that will stop and reverse the
door until the door is fully opened.
Section 12.10 and 12.11
shows the connections for the directional, manual and timed switch
inputs to the controller.
Singe Position
Operator Switch