The RLS1n model can be connected to the C box using a pair of wires and the banana plug sockets on both units. Red is signal, black is ground. You will need a photocell control switch if you intend to use one photocell to start and finish such as a lap race. This can be a simple on-off-on switch on the signal leg of the circuit.

Originally posted 23 Oct 2000 by Fred Patton