There were some questions that came up this week on how the fire department open input works. My thanks to BK for his help.
Activation of the fire open input causes the gate to open fully while overriding any active external entrapment sensors. A momentary contact is all that is needed. When it gets to the open limit it stops and enters entrapment mode. This was done because the entrapment sensors are ignored, so the gate goes into a safe condition.
There are two ways to exit entrapment mode and return to normal operation:
- Reset the controller. This requires access to the controller itself.
- Give the controller a stop command or an open command on the open input, which will place the operator in safe mode. In safe mode the close timer is disabled so the gate will remain on the open limit. Any other close command or any open command will return the gate to normal operation, such as free exit, remote transmitter, or access control keypad.
This applies to SmartCNX, SmartDC, and SmartTouch boards.
The stop button on the outside of the SmartCNX operators will clear the entrapment mode, but the operator won’t move because it received a command to stop. Any subsequent command to move will return it to normal operation.