260
E5ZE Temperature Controller Read Protocol
Appendix E
RS-422 4-wire Connections
Pin No.
Signal name
Abbreviation
Signal direction
1
Receive data B
RDB
Input
2
Receive data A
RDA
Input
3
Signal ground
SG
---
4
Send data B
SDB
Output
5
Send data A
SDA
Output
Terminating
resistance
Shield
Shield
Serial Commu-
nications Board/Unit
E5ZE
Signal
name
Pin
No.
Signal
name
Signal
name
Terminating
resistance
SN751177N or
equivalent
Terminating
resistance
Terminating
resistance
240
Ω
Turn off the communications switch
to disconnect terminating resistance.
Ter-
minal
RS-422: D-sub
9-pin female
RS-422:
Terminals
Terminal
block
Ter-
minal
Hood
*1: Set the 2-/4-wire switch
to the 4-wire setting.
*2: Turn ON the terminat-
ing resistance switch.
6.8 V
240
Ω
RDB
1
2
4
RDA
SDB
240
Ω
4.7 k
Ω
4.7 k
Ω
51 k
Ω
51 k
Ω
5 V
RX
TX
5
SDA
RDB
1
2
4
RDA
SDB
5
SDA
FG
SDB
SDA
RDB
RDA
2
1
8
6
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