B rs-485 readers – GeoVision GV-AS2120 IP Control Panel User Manual
Page 113
GV-AS410 / 4110 / 810 / 8110 Controller
111
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=
4
7
5.2.1.B RS-485 Readers
For long-distance connection and non-Wiegand card readers, you can connect RS-485
connection with any GV-Readers and GV-GF Fingerprint
Readers. Using a single RS-485
cable, up to
8 readers
can be connected together with to the RS-485 A+ / A- interface. For
GV-AS810 / 8110, another 8 readers can be connected to the RS-485 B+ / B- interface, for a
total of
16 RS-485 readers
.
When multiple readers are connected together, an extra power supply to each unit is
required. Use
12V
power output
and
GND
on the power terminal or the Wiegand connectors
to power on each unit.
Connect each reader to the
power terminal or Wiegand
connectors for power supply
RS485
12
V
A+
A-
B+
B-
G
N
D
Up to 8 GV-Readers and
GV-GF Fingerprint Readers
12V OUTPUT
12
V
G
N
D
12
V
G
N
D
12
V
G
N
D
B+ B- Not functional
for GV-AS410 / 4110
RS
485
_A
RS
485
_B
Terminal
Resistor
J37
J35
Figure 5-3