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Appendix EE5ZE Temperature Controller Read Protocol
189
RS422/485 Connections
• RS-485
Pin No. Signal name Abbreviation Signal direction
1 Disabled (Do not connect.) – –
2 Disabled (Do not connect.) – –
3 Signal ground SG –
4 Terminal B (+ side) B I/O
5 Terminal A (– side) A I/O
Turn off the communications switch
to disconnect terminating resistance.
Terminating
resistance
240 Ω
SN751177N or
equivalent
Terminating
resistance
Shielded cable
Shielded cable
Terminating
resistance
Serial Communications
Board
E5ZE
E5ZE
Signal
name
Pin No.
Te r-
minal
Signal
name
Signal
name
RS-485: D-sub
9-pin female
RS-485: Terminals
RS-485: Terminals
Te r-
minal
Note Terminal block pins 1 and 2 cannot be connected. If these blocks are used, operation of the E5ZE may fail.