Epson RC420 Manual page 26

Setup & Operation 2.3 Controller (Part Names and Functions)
(10) OPTIONAL DEVICE connector
■
CAUTION
(11) Cooling Fan Filter
NOTE
(12) Lockout metal hasp
16
Connects the optional operation unit or ATTEND (TEACH) control device or
OPTIONAL DEVICE Dummy Plug.
For details, refer to the Setup & Operation 4. OPTIONAL DEVICE Connector.
Do not connect the EPSON RC+ software key to the OPTIONAL DEVICE
connector. Connecting the EPSON RC+ software key to the OPTIONAL
DEVICE connector while the Controller is ON may cause damage to the
EPSON RC+ software key.
Connect the EPSON RC+ software key to the IEEE-1284 (parallel)
connector on the rear of the Controller.
A protective filter is installed in front of the cooling fan to filter out dust.
Check condition of the filter regularly and clean it as necessary. A dirty filter may
result in the malfunction of the robot system as the temperature rises in the
Controller.
The filter needs regular check-up and cleaning.
Maintenance 10.4 Fan Filter.
To lock the power switch in OFF position, set the power switch to OFF position and
put the metal hasp down on the right and then close the door. Cut off the power in
this way for maintenance or repair of the robot system.
For details, refer to the
RC420 Rev.9