Photo eye to switch sensing edge control conversion system

Apparatus for converting a door operator which controls an automatic motorized door which utilizes photo eye obstruction sensing to signal said operator of an obstruction to the door being controlled, said signal being of a given amplitude, periodicity and duty cycle, to operate with a switch sensing edge placed along an edge of the door, said apparatus comprised of:

• polarity independent connection means to connect the door operator to the apparatus without regard to electrical polarity;
• voltage hold up means to buffer the output voltage of an output driver;
• an output driver to provide an output pulse to match said given amplitude, periodicity and duty cycle of the door operator;
• power supply means to convert the power available from the door operator for use with the apparatus;
• a microcontroller programmable to create a signal to said output driver to match said amplitude, periodicity and duty cycle of the door operator;
• wherein said apparatus is connected to said switch sensing edge and provides a signal to the door operator which simulate a signal which would be provided to the door operator from a photo-eye obstruction sensor.

Apparatus for use with a door operator which controls a motorized door, the door operator utilizing a photo eye obstruction sensor which stops the operation of the motorized door when the photo eye obstruction sensor senses an obstruction thereby discontinuing a continuous signal to the door operator, said continuous signal being a signal of a given amplitude, periodicity and duty cycle, the apparatus allowing substitution of a switch sensing edge which switches between an open or close condition dependent on the switch sensing edge contacting an obstruction and providing an obstruction indication to the door operator such as to allow interchangeability between a photo eye sensor and a switch sensing edge, the apparatus comprised of a connection to a switch sensing edge;

• a microcontroller-based signal generator which provides a signal identical to the amplitude, periodicity and duty cycle of the photo eye obstruction sensor which is being replaced by the switch sensing edge;
• said connection to said switch sensing edge providing an electrical path from the said sensing edge to said microcontroller-based signal generator;
• and
• an output driver connected to the door operator input previously used for the photo eye which is being replaced.