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K3T# Intelligent Signal Processor Protocol
RS-422/485 Connections
Serial Communications Board
(CS Series only)
Serial Communications Unit
(CS/CJ Series)
RS-422/485 port
‡ RS-422 4-wire Connections
Serial Communications
Board/Unit
*1: Set the 2-/4-wire switch
to the 4-wire setting.
*2: Turn ON the terminat-
ing resistance switch.
358
PC PS
Signal name
Send data A
Send data B
Receive data A
Receive data B
Signal ground
Protective ground
Intelligent Sig-
RS-422: D-sub
nal Processor
9-pin female
RS-422:
Terminal block
Signal
Pin
Name
No.
Signal
Termi-
Name
FG
nal.
Hood
RDA
9
SDA
6
RDB
SDB
8
5
6
SDA
1
RDA
1
RDB
SDB
2
3
SG
Shield
Terminating resistance (approx. 220 Ω) is
connected via the terminal block switch.
K3T#
RS-422/485
K3T#
RS-422/485
Up to 32 units can be connected
K3T#
RS-422/485
Abbreviation
Signal direction
SDA
Output
SDB
Output
RDA
Output
RDB
Input
SG
---
FG
---
SN751177N or
equivalent
Terminal block SW
220 Ω
220 Ω
6.8 V
Appendix I
Pin No.
9
5
6
1
3
7
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