Keyscan Inc. – Technical Guide (PC109x - 07.15)
Terminate Reader Cables
For readers, use six (6) conductors 22 AWG shielded cable or a cable with overall shielding.
For elevator readers or current demanding readers, such as the Indala PX620 or the HID5375, use six (6)
conductors 18 AWG shielded cable.
The shielding wire must be connected to the earth ground lug at the ACU and isolated and taped at the reader.
The maximum reader distance is 500 feet (152.4 m) from the ACU when transmitting a Wiegand signal. If the
distance is greater than 500 feet (152.4 m), install one WIEEX2 per reader, which extends the distance to
4000 feet (1219.2 m). See Appendix B – WIEEX2.
Reader Wiring
Red – Positive DC power. For readers that draw more current, connect the red wire directly to the power
supply.
Black – Ground (GND)
Brown – Light emitting diode (LED) on reader
Green – Data output bit 0
White – Data output bit 1
Blue – Optional pre-alert (reader beeper)
Keyscan & HID Readers
Wiring diagrams are on the following pages. Refer to the appropriate diagram for specific reader connections.
Be sure to use cables that comply with the reader’s wiring specifications.
Ensure that the total current draw of all readers connected to the control board’s reader terminals is within the
limit of the DPS-15 power supply; otherwise, you will require a separate power supply.
Power Specifications
The following table outlines reader power specifications:
Table 12 – Keyscan & HID Reader Power Specifications
K-PROX2 & K-PROX SG(125 KHz
compatible)
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