Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 532

E5ZE Temperature Controller Read Protocol
RS422/485 Connections
• RS-485 2-wire Connections
Note Terminal block pins 1 and 2 cannot be connected. If these blocks are used, operation of the E5ZE may
fail.
Pin No. Signal name
1 Disabled (Do not connect.)
2 Disabled (Do not connect.)
3 Signal ground
4 Terminal B (+ side)
5 Terminal A (– side)
Serial Commu-
nications Board/Unit
RS-485: D-sub
9-pin female
Signal
Pin
name
No.
FG
Hood
B 2
A
1
Shield
*1: Set the 2-/4-wire switch
to the 2-wire setting.
*2: Turn ON the terminat-
ing resistance switch.
Abbreviation
---
---
SG
B
A
Turn off the communications switch
to disconnect terminating resistance.
Terminating
resistance
240 Ω
E5ZE
RS-485: Terminals
Ter- Signal
minal name
3 SG
4 B
5 A
E5ZE
RS-485: Terminals
Shield
Ter-
Signal
minal name
3 SG
4 B
5 A
Appendix H
Signal direction
---
---
---
I/O
I/O
SN751177N or
equivalent
5 V
51 kΩ
4.7 kΩ
RX
4.7 kΩ
51 kΩ
TX
6.8 V
Terminating
resistance
240 Ω
503