Siemens SINUMERIK KB 310C CNC Operator Panel (6FC5203-0AF21-0AA1)

The Siemens 6FC5203-0AF21-0AA1 is a SINUMERIK CNC Full Keyboard, model KB 310C, designed for use with Siemens SINUMERIK 840D CNC control systems. The nameplate confirms the article number 6FC5203-0AF21-0AA1, drawing number A5E00285373, hardware status FS: D, type designation T M86002760, and a unit weight of 1.8 kg. The unit is identified on the nameplate as "USB, KEY" and is part of the SINUMERIK operator component family used in industrial machining environments.

The KB 310C features a 310 mm wide footprint and a full QWERTY layout with USB mechanical keys, providing tactile feedback for data entry, program editing, and CNC navigation tasks. The keyboard connects to the operator panel front or PCU via USB, with a 1.5 meter integrated cable. Power is supplied through the USB interface, so no external supply is required. Markings on the nameplate include CE, UL Listed (Industrial Control Equipment, file 58RA), EAC, and KCC REM S49 SINUMERIK regulatory certifications. The unit is manufactured by Siemens AG, Frauenauracher Str. 80, DE 91056 Erlangen, Germany.

Compatible host systems include the SINUMERIK 840D, 840Di, and operator panel fronts such as OP 010, OP 012, and PCU 50 platforms that accept a USB QWERTY operator keyboard. Typical applications cover CNC milling machines, turning centers, grinding machines, and machining cells where a full alphanumeric operator interface is required at the control panel. The article number, drawing number, and serial number are visible on the rating label for verification against installation documentation and spare parts catalogs.

Stock # 0226-052