User`s manual

RS-422/485 Communications Unit Chapter 7-1

7-1-3 Names of Parts

Terminal Block

Terminating Resistance Switch

Note Set the terminating resistance switch to ON to connect the terminating

resistance.

7-1-4 Mouting Procedure

Use the following procedure to mount an RS-422/485 Communications Unit

SI-485/J7 (3G3JV-PSI485J) to a J7AZ Inverter.

1. Turn OFF the Inverter’s power supply. Mounting the RS-422/485

Communications Unit without turning OFF the Inverter’s power supply may

result in electric shock or damage to equipment.

2. Loosen the Inverter’s front cover mounting screws and remove the front

cover as shown on the left below.

3. Remove the optional cover as shown on the right below.

Terminal block

Terminating resistance switch

12345

S– S+ Shield R– R+

OFF ON