6
1.3.2 Connecting to GV-AS Controller through RS-485 Interface
12V
-
+
GND
(Black)
(Blue)
(Light blue)
(Red)
GV-AS Controller
GV-Reader
GV-Reader
Switch Setting for RS-485 Connection (GV-Reader1251 / 1352 V2 only)
1
2
3
4
5
6
7
8
ON
ECE
SW4 must be turned OFF.
Switch Setting for Connecting Multiple GV-Readers (RS-485) (GV-Reader1251 / 1352
V2 only)
Multiple readers can be connected to the GV-AS Controller through a single RS-485
cable. When you connect more than one GV-Reader to the GV-AS Controller, on the
last connected GV-Reader turn SW8 to ON. Make sure to define the ID of each reader
with SW5 to SW7 first.
GV-Reader 1
GV-Reader 8
1 2 3 4 5 6 7 8
ON
ECE
1 2 3 4 5 6 7 8
ON
ECE
ID Number Setting for Connecting Multiple GV-Readers (RS-485) (GV-SR1251 only)
Multiple readers can be connected to the GV-AS Controller through a single RS-485
cable. To define the ID of each GV-SR1251, see
1.2.3 Defining the ID Number of GV-
SR1251 by Using the GV-Reader Config Utility
.
