Omron V680-CA5D01-V2 User Manual page 43

SECTION 2
Installation, Connections, and Wiring
RS-422 Connection to Host Device
Host device
RS-422
(terminating
resistance
connected)
Refer to RS-422 Connections for information on RS-422 connections between the host device and ID Controllers.
If the first communications received by an ID Controller are via the RS-232C interface, reception of RS-422/RS-485
communications will be prohibited. If the first communications are received via RS-422/RS-485, reception of RS-232C
communications will be prohibited. Therefore, when changing the system configuration of an ID Controller, always turn
OFF the power supply before changing the connections.
RS-485 Connection to the Host Device
Host device
RS-485
(terminating
resistance
connected)
Note: Short-circuit terminals 1 and 3, and 2 and 4 to use RS-485 communications.
Refer to RS-485 Connections for information on RS-485 connections between the host device and ID Controllers.
If the first communications received by an ID Controller are via the RS-232C interface, reception of RS-422/RS-485
communications will be prohibited. If the first communications are received via RS-422/RS-485, reception of RS-232C
communications will be prohibited. Therefore, when changing the system configuration of an ID Controller, always turn
OFF the power supply before changing the connections.
RFID System
40
User's Manual
SW 6: OFF
(no terminating
resistance)
RS-422
ID Controller
Total length: 500 m max.
Pin No. Symbol
1 RDA(−)
2 RDB(+)
3 SDA(−)
4 SDB(+)
5 SG
p. 38
SW 6: OFF
(no terminating
resistance)
RS-485
ID Controller
Total length: 500 m max.
Pin No. Symbol
1 RDA(−)
2 RDB(+)
3 SDA(−)
4 SDB(+)
5 SG
p. 38
SW 6: OFF SW 6: OFF
(no terminating (no terminating
resistance) resistance)
RS-422
ID Controller
ID Controller
Pin No. Symbol Pin No. Symbol
1 RDA(−) 1
2 RDB(+) 2
3 SDA(−) 3
4 SDB(+) 4
5 SG 5
SW 6: OFF
SW 6: OFF
(no terminating
(no terminating
resistance)
resistance)
RS-485
ID Controller ID Controller
Pin No. Symbol
Pin No. Symbol
1 RDA(−) 1
2 RDB(+) 2
3 SDA(−) 3
4 SDB(+) 4
5 SG 5
SW 6: ON
(terminating
resistance)
RS-422
ID Controller
Pin No. Symbol
RDA(−) 1 RDA(−)
RDB(+) 2 RDB(+)
SDA(−) 3 SDA(−)
SDB(+) 4 SDB(+)
SG 5 SG
SW 6: ON
(terminating
resistance)
RS-485
ID Controller
Pin No. Symbol
RDA(−) 1 RDA(−)
RDB(+) 2 RDB(+)
SDA(−) 3 SDA(−)
SDB(+) 4 SDB(+)
SG 5 SG