Omron CQM1H-SCB41 Operation Manual page 206

E5ZE Temperature Controller Read Protocol
RS422/485 Connections
• RS-485
Terminating
resistance
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 Communications
Board
E5ZE
RS-485: D-sub
RS-485: Terminals
9-pin female
Signal
Ter-
name Pin No.
minal
Shielded cable
Shielded cable
Abbreviation
–
–
SG
B
A
Turn off the communications switch
to disconnect terminating resistance.
Terminating
resistance
240
Signal
name
E5ZE
RS-485: Terminals
Terminating
resistance
Ter- Signal
minal name
Appendix E
Signal direction
–
–
–
I/O
I/O
SN751177N or
equivalent
191