504
E5ZE Temperature Controller Read Protocol Appendix H
• 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.
Te r-
minal
RS-422: D-sub
9-pin female
RS-422:
Terminals
Terminal
block
Te r-
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 kΩ
4.7 kΩ
51 kΩ
5 V
RX
TX
5
SDA
RDB
1
2
4
RDA
SDB
5
SDA
FG
SDB
SDA
RDB
RDA
2
1
8
6
51 kΩ
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