User's Manual

10
SIA recommended cable type for Wiegand signals
Cable Length Cable Diameter
inch
Diameter
mm
Up to 61m (200.1 ft) AWG22 0.025 0.64
Up to 91m (301.8 ft) AWG20 0.03 0.82
Up to 153m (502 ft) AWG18 0.04 1.02
Recommended cable for clock and data ABA track 2
emulation: Up to 25 meter (82 foot), AWG22.
Wiegand Signal Levels
Voh = Output Voltage idle high
Vol = Output Voltage active low
Wiegand/Clock&Data ABA reads evaluation
The SmartID readers provide true open collector
(clean) output C.
Pull-up resistors
External pull-up resistors are required when the
controller does not provide internal pull-up resistance.
Typical pull-up resistor value is 1kOhm.
The pull-up resistor #4 connects from reader
connector pin 3 to a 5 Volt reference.
The pull-up resistor #2 connects from reader
connector pin 4 to a 5 Volt reference.