545
E5
@
J Temperature Controller Protocol Appendix J
RS-422A/485 Connections
• RS-422A 4-wire connections
Signal name Abbreviation Signal direction Pin No.
Send data A SDA Output 26
Send data B SDB Output 25
Receive data A RDA Input 28
Receive data B RDB Input 29
Signal ground SG --- 27
RS-422A/485 port
E5#J
Up to 32 units can be
connected.
E5#J
E5#J
→
→
→
RS-422A/485
RS-422A/485
RS-422A/485
Serial Communications Board
(CS Series only)
Serial Communications Unit
(CS/CJ Series)
PLC
PS
Terminating resist-
ance (240 Ω) is
connected via the
terminator switch.
Terminator switch
Serial Commu-
nications Board/Unit
Shield
Terminating
resistance
Terminating re-
sistance
240 Ω
E5AJ
SN751177N or
equivalent
E5AJ
Shield
Signal
name
Pin
No.
Signal
name
Signal
name
Te r-
minal
RS-422A: D-sub
9-pin female
RS-422A:
Terminal Block
RS-422A:
Terminal Block
Te r-
minal
Shell
*1: Set the 2-/4-wire switch
to the 4-wire setting.
*2: Turn ON the terminat-
ing resistance switch.
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