I just purchased a C3 Index Pulse Card from CNC4PC. It comes prewired with a H21A2 phototransistor. This is a slotted optical interruptor. I wanted to use a reflective object sensor. I emailed Arturo and he said to use the QRB1114. So, I got one of those. I cannnot however figure out how to wire it. The QRB1114 has an emitter, collector, anode, and cathode. The C3 board has connections labeled A, E/K, and C. I don't want to burn anything up so I didn't just try hooking it up various ways. Does anyone know for sure how it should be wired?