Operation Manual

Instruction Manual
3
• NOTE: In “422” mode, the ECHO setting is not used.
• The Echo mode is useful for detecting if there is data collision occurring on RS-
485. If the echoed data is not equal to the transmitted data, then data collision is
occurring.
DB9 Pin Assignment
DB9 Pin RS-422 RS-485
1 TxD - Data -
2 TxD + Data +
3 RxD + NC
4 RxD - NC
5 GND GND
6 NC NC
7 NC NC
8 NC NC
9 NC NC