User's Manual

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3.2 P908 RS-485 Reader Interface
With ASIS AMR17x series readers, the wiring terminates at (Port Device) on P2. It is
recommended to use 1 pair twisted screen cable for the RS485 network and 1 pair
1.5mm cable for DC12V supply.
Note: The RS-485 connection is polarized; user has to ensure correct polarity during
installation.
WIEGAND1
2
1
4
3
6
5
8
7
BUZBUZ OKLOKL ERLERL
D1D1 D0D0
GNDGND
+V+V
BUZBUZ OKLOKL ERLERL
D1D1 D0D0
GNDGND
+V+V
BUZBUZ OKLOKL ERLERL
D1D1 D0D0
GNDGND
+V+V
BUZBUZ OKLOKL ERLERL
D1D1 D0D0
GNDGND
+V+V
BTYLFIRE
ACF
GND GND
DC IN
InstaStart
STATUS
InstaStart
WIEGAND2
WIEGAND3
WIEGAND4
WIEGAND5
WIEGAND6
WIEGAND7
WIEGAND8
CAN+ CAN-
SCN
RS485(Dev)
CANBus(Dev)
DEV- DEV+
SCN
Wire Color Legend Description
RS485 -
RS485 +
Ground
12V
It is advisable to ground the screen cable to eliminate possible noise interferences. For
the same communication loop, all screen cable should tie in to make a continuous link.
Do not leave the screen wire un-terminated as it may short accidentally to on-board
components.