Specifications

Part No 4801-5156 Rev 10-2014 RollSeal SC-325 & SC-650 Controllers Page 21
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.
Three Position
Operator Switch
Singe Position
Operator Switch