I am working on a project to use existing gate sensors to trigger an alert.
I have 4 gates in a parking lot that include beam sensors to prevent gate from closing on a car.
I have unused wires running from each gate operator to the building.
I want to hook up 2 wires from each sensor and have them trigger something in the building when the sensor closes its relay.
The problem is, I need for each pair coming from the sensors to be isolated from each other, so when gate 1 is triggered, it does not short out gate 2, 3 and 4 affecting their gate operator.
Can someone tell me how I can tie all 4 sensors into 1 unit that will detect an input on any of the 4 triggering an output and at the same time not interfere with each other? All inputs from the gates are simple relays with no voltage present.
My initial thoughts were something like an alarm panel with multiple zone contacts but I am looking for something more simple and inexpensive to build.
Thanks
Larry
I have 4 gates in a parking lot that include beam sensors to prevent gate from closing on a car.
I have unused wires running from each gate operator to the building.
I want to hook up 2 wires from each sensor and have them trigger something in the building when the sensor closes its relay.
The problem is, I need for each pair coming from the sensors to be isolated from each other, so when gate 1 is triggered, it does not short out gate 2, 3 and 4 affecting their gate operator.
Can someone tell me how I can tie all 4 sensors into 1 unit that will detect an input on any of the 4 triggering an output and at the same time not interfere with each other? All inputs from the gates are simple relays with no voltage present.
My initial thoughts were something like an alarm panel with multiple zone contacts but I am looking for something more simple and inexpensive to build.
Thanks
Larry