A&D HW-10KGL Instruction Manual page 71

Circuits
RS-422 input
RS-485 input
RS-422 output
RS-485 output
Caution
Please confirm that the AC adapter type is correct for your local voltage and
receptacle type.
Selection switch for the RS-422/ RS-485 interface
Selects either of RS-422 or RS-485 interface using the switch on the board.
Installing OP-04
Step 1 Remove two screws that attach the
RS-232C board on rear of display
unit. Remove the RS-232C board.
Step 2 Switch the connections.
Step 3 Insert the board into the display
unit and affix with the screws.
HV-G/HW-G Series
47kΩ
4.7kΩ
4.7kΩ
120Ω
1 2 3 4
SDA SDB RDA RDB TRM HI
RS-422/485 terminal
Page 69
5V
47kΩ
5 6 7 8 9
OK LO COM
Relay output
Relay
HI
OK
LO
DC
AC adapter jack
17. Options