Figure 1. Indigo 201 transmitter base main parts and mounting screw positions 1 Probe and probe cable connector inside the locking wheel 2 Wiring from the back: cut open the seal 3 Rubber cable lead-through with strain relief 4 Screw terminals for analog outputs 1-3 and relays A and B 5 Screw terminals for 24 V power supply input CAUTION Do not energize the power supply before the wiring has been connected.