GeoVision GV-Reader1251 Manual

2.2 Connecting through RS-485 Interface
The following diagrams use GV-RK1352 and GV-AS810 Controller as an example. Up to
eight readers can be connected together to the RS-485 interface on GV-AS810 Controller.
 Connecting four or less readers to GV-AS810 Controller:
Wire Color Function
Black GND
Light Blue RS-485 -
Blue RS-485 +
Red DC 7.5 ~ 12V
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 Connecting five or more readers to GV-AS810 Controller:
For readers five to eight, connect the RS-485 cable to the RS-485 interface on GV-
AS810 Controller and then connect the 12V power output and GND of the reader to a
12V DC power output on the controller.

GeoVision GV-Reader1251 Specifications

General

Brand	GeoVision
Model	GV-Reader1251
Category	Card Reader
Language	English