Use an R=10K Ω resistor to read the signal (for example using a PLC).
Use an R=1K6 Ω resistor when Zebra 3S is daisy-chained with another Zebra 3S and your VCC = 5 − 12V.
Use an R=4K7 Ω resistor when Zebra 3S is daisy-chained with another Zebra 3S and your VCC = 24V.