A&D Weighing HW-200KV-WP - Manual (Page 62)

Page 60 HV-WP/HW-WP Series
17.3. OP-04, Options
Circuits
Selection switch for the RS-422/ RS-485 interface
Selects either of RS-422 or RS-485 interface using a switch on the board.
17.3.1. Installing the OP-04
Caution Do not pull on the connected cables while opening the rear panel.
Step 1 Remove eight pairs of screws and O
rings from the indicator unit. Open the
rear panel of the unit.
Step 2 Remove the standard interface board
from the indicator unit. Install the
option board at the same position.
Step 3 Connect the cable to the J3 connector
on the option board.
Step 4 Wire the connector for J1 and connect
it to the option board.
Step 5 Connect a cable from the transformer
to the J2 connector.
Step 6 Set a interface type with the switch.
Step 7 Close and secure the rear panel using
the screws and O rings removed at
step 1.
Relay output RS-422/485 terminal
RS-422 output
RS-485 output
RS-422 input
RS-485 input
Relay