Omron CS1W-SCU21 Operation Manual page 279

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