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Appendix G
E5jJ Temperature Controller Protocol
231
• RS-422A
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
Terminating
resistance
(terminator)
Terminating resis-
tance (240 Ω) is
connected via the
terminator switch.
Terminator switch
Serial Communications
Board
Shielded cable
Terminating
resistance
Terminating re-
sistance
240 Ω
E5AJ
SN751177N or
equivalent
E5AJ
Shielded cable
Signal
name
Pin
No.
Signal
name
Signal
name
Termi-
nal
RS-422A: D-sub
9-pin female
RS-422A:
Terminal Block
RS-422A:
Terminal Block
Termi-
nal
• RS-485
Signal name Abbreviation Signal direction Pin No.
Terminal A A I/O 26, 28
Terminal B B I/O 25, 29
Signal ground SG – 27
Terminat-
ing resis-
tance
Terminator switch
Serial Communications
Board
Shielded cable
E5AJ
E5AJ
Shielded cable
Signal
name
Pin
No.
Signal
name
Signal
name
Terminating resis-
tance (240 Ω) is
connected via the
terminator switch.
Terminating
resistance
SN751177N
or equivalent
Termi-
nal
RS-485: D-sub
9-pin female
RS-485:
Terminal Block
RS-485:
Terminal Block
Termi-
nal