IR Beam Breaking Circuit

[Al Skierkiewicz]

Originally Posted by Steve Warner

Another question here. Can more that one Banner photo sensor be protected by a single 20A fuse? A single #18 wire could be connected to the breaker and then to a smaller fuse. Can the load side of the smaller fuse then be connected to more than one sensor? I don't see where the rules address this unless it's R46 F or G if this would be considered a custom circuit.

Yes,
Multiple sensors can be powered from a single 20 amp breaker. All other electrical rules apply however, including only one wire per Wago terminal. You can bring the sensors to a common enclosed circuit board (preferred) or you can tie them to a barrier strip or terminal block as long as the connections are insulated. It can be considered a custom circuit and so the stated rules allow you to fuse the power line in the circuit per par G. If you use the circuit board method, a fuse on the board is a good idea. Then you can connect the sensors to the board and use your own connector to wire the outputs to your breakouts.