5.3 Product overviewThe connections on the rear panel of the device areprotected by dust protection caps from contamination anddamage.NOTICEContamination or damage may result if the dustprotection caps are missing!This may impair the proper functioning of the contactsor destroy them.Remove dust protection caps only when connectingmeasuring devices or peripheralsIf you remove a measuring device or peripheral,reattach the dust protection cap to the connectionThe type and number of connections may varydepending on the product version.Rear panel without dust protection capsDRO 10x: Further information: "A", Page 3DRO 203, DRO 30x: Further information: "B", Page 3Rear panel1 Power switch and power connection2 Earth (ground) terminal as per IEC 60471 - 50173 X31: USB 2.0 Hi-Speed connection (Type C) for USBmass storage device and PC connection (beneathprotective cover)4 X1 to X4: Device variant with 9-pin D-sub connectionsfor encoders with TTL interface5 X10: 15-pin D-sub connection for touch probes andauxiliary devices (e.g. HEIDENHAIN touch probe,IOB). Available on DRO 30x products only.5.4 Connecting the encodersRemove and save the dust protection capsRoute the cables depending on the mounting variantFurther information: "Assembly", Page 10Connect the encoder cables tightly to the respectiveconnectionsFurther information: "Product overview", Page 12If the cable connectors include mounting screws, donot overtighten themPin layout of X1 to X4Further information: "O", Page 1285.5 Connecting a USB deviceOpen the dust protection capConnect the USB device or cable to the respectiveconnectionFurther information: "Product overview", Page 12Pin layout of X31Further information: "P", Page 12812 ACU-RITE | DRO 100, DRO 203, DRO 300 | Installation Instructions | 01/2018en