301
E5
#
J Temperature Controller Protocol
Appendix G
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)
PC 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
Ter-
minal
RS-422A: D-sub
9-pin female
RS-422A:
Terminal Block
RS-422A:
Terminal Block
Ter-
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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