Patlite WDT-4LR-Z2 Instruction Manual page 50

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Selecting the signal wire for a simple counter
 Use one of the following to select the signal wire.
Signal wire selection method
Using a DIP switch on the unit
Using WDS-WIN01
Wireless Data Acquisition System Instruction Manual
DIP Switch
50
Wire used by the simple counter
Blue (fixed)
You can select any one of red, amber,
green, blue, white, or buzzer.