Dahua ASR2101H-D Посібник користувача - Сторінка 8
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2.1 Ports Overview
Color
Red
Black
Blue
White
Green
Brown
Yellow
Purple
2.2 Wiring Requirements
● Connect the card reader to the Wiegand ports or the RS-485 ports according to the type of the
card reader.
● Select proper wires according to the requirements on wires.
Type
RS-485 card reader
Wiegand card reader
2 Wiring and Installation
Table 2-1 Ports overview
Port
RD+
RD–
CASE
D1
D0
LED
RS–485_B
RS–485_A
Table 2-2 Wiring requirements of card reader
Impedance Requirements
Connects RS-485 wires, and the
impedance of a single wire must≤ 10
Ω.
Connects Wiegand wires, and the
impedance of a single wire must≤ 2
Ω.
2
Description
PWR (12 VDC)
GND
Anti-tampering alarm signal
Wiegands transmission signal
(effective only when using
Wiegand protocol)
Wiegand responsive signal
(effective only when using
Wiegand protocol)
Length Requirements
≤ 100 m. Above UL1061
24AWG shielded wires are
recommended.
≤ 80 m. Above UL1061
18AWG shielded wires are
recommended.