Omron VS mini J7 User Manual page 106

RS-422/485 Communications Unit
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4. Align the Unit with the Inverter's connector, and push the Unit onto the
Inverter (so that the 3 catches enter the corresponding holes) until it is
securely mounted.
5. Mount the front cover (removed previously) on top of the RS-422/485
Communications Unit, and secure it using the front cover mounting screws.
(Do not mount the optional cover.)
Note When not using the RS-422/485 Communications Unit, be sure to mount the
optional cover. Not mounting the optional cover will leave charged parts
exposed and may result in electric shock or damage to equipment.
Connector
Chapter 7-1