IDEC MICRO/I HG2J-7U Hardware Manual page 14

1 HG2J-7U
Using RS422/485 interface
HG2J-7U is not equipped with terminating resistor. Insert a terminating resistor of an appropriate value (about 100 to
120 Ohm, 1/2 W minimum) between terminal number 8 (RDA) and terminal number 9 (RDB), if necessary.
Terminal Number 8 (RDA)
For details about inserting and removing wires, refer to "1.8 Wiring" on page 1-12.
1-4
Terminal Number 9 (RDB)
MICRO/I Hardware Manual