Setup & Operation 2.3 Controller (Part Names and Functions)16 RC420 Rev.9(10) OPTIONAL DEVICE connectorConnects the optional operation unit or ATTEND (TEACH) control device orOPTIONAL DEVICE Dummy Plug.For details, refer to the Setup & Operation 4. OPTIONAL DEVICE Connector.CAUTION■ Do not connect the EPSON RC+ software key to the OPTIONAL DEVICEconnector. Connecting the EPSON RC+ software key to the OPTIONALDEVICE connector while the Controller is ON may cause damage to theEPSON RC+ software key.Connect the EPSON RC+ software key to the IEEE-1284 (parallel)connector on the rear of the Controller.(11) Cooling Fan FilterA 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 mayresult in the malfunction of the robot system as the temperature rises in theController.The filter needs regular check-up and cleaning. For details, refer to theMaintenance 10.4 Fan Filter.(12) Lockout metal haspTo lock the power switch in OFF position, set the power switch to OFF position andput the metal hasp down on the right and then close the door. Cut off the power inthis way for maintenance or repair of the robot system.)NOTE
