June 26, 2018
6
6.2 Assigning Addresses to GV-I/O Box
You can connect any GV-IO Box of 4, 8 and 16 ports together through RS-485 wiring. Up to
9 pieces of GV-I/O Box can be chained together to expand the I/O capacity. Use the ID
switch (1~9) to assign addresses 1~9 to each GV-I/O Box.
RS-485 +/-
GV-IO Box (1)
GV-IO Box (2)
GV-IO Box (9)
RS-485 +/-
RS-485 +/-
~
PC
H
Output
DC 12V
G
F
E
RS- 485 RX
RX- 485 TX
A
com.A
DI
1
USB RX
USB TX
GV-IOBOX 16
Input
DI
2
DI
3
DI
4
B
com.B
D I
8
D I
7
D I
6
D I
5
C
com.C
D I 12
D I 11
D I 10
D I
9
D
com.D
D I 16
D I 15
D I 14
D I 13
DO 4
DO 3
DO 2
DO 1
DO 8
DO 7
DO 6
DO 5
DO 12
DO 11
DO 10
DO 9
DO 16
DO 15
DO 14
DO 13
com.H
com.G
com.F
com.E
H
Output
DC 12V
G
F
E
RS- 485 RX
RX- 485 TX
A
com.A
DI
1
USB RX
USB TX
GV-IOBOX 16
Input
DI
2
DI
3
DI
4
B
com.B
D I
8
D I
7
D I
6
D I
5
C
com.C
D I 12
D I 11
D I 10
D I
9
D
com.D
D I 16
D I 15
D I 14
D I 13
DO 4
DO 3
DO 2
DO 1
DO 8
DO 7
DO 6
DO 5
DO 12
DO 11
DO 10
DO 9
DO 16
DO 15
DO 14
DO 13
com.H
com.G
com.F
com.E
H
Output
DC 12V
G
F
E
RS- 485 R X
RX- 485 TX
A
com.A
DI
1
USB RX
USB TX
GV-IOBOX 16
Input
DI
2
DI
3
DI
4
B
com.B
D I
8
D I
7
D I
6
D I
5
C
com.C
D I 12
D I 11
D I 10
D I
9
D
com.D
D I 16
D I 15
D I 14
D I 13
DO 4
DO 3
DO 2
DO 1
DO 8
DO 7
DO 6
DO 5
DO 12
DO 11
DO 10
DO 9
DO 16
DO 15
DO 14
DO 13
com.H
com.G
com.F
com.E
Note:
The maximum distance for RS-485 connection is up to 600 m / 1968.5 ft.
ID Switch
B
E
1. Addresses 0 and A to F are NOT functional.
2. Assign the addresses when the power is off.
3. If you want to change the assigned address of the connected GV-I/O
Box, set the switch to the new address and re-plug the power
adaptor.