What this reader does on a door or gate
The Siemens 6GT2831-6BA50 is a SIMATIC RF1070R access control reader operating at 13.56 MHz, designed to read Legic Prime, Legic Advant, ISO 15693, ISO 14443 A/B, Felica, NXP NTAG21x, and HID iClass transponders. It connects to a PC or control system via a 1.8 m USB 2.0 cable or an RS232 cable, drawing 0.15 A typical at 5 V DC. The read range is 0.03 m maximum, but the actual range depends on the transponder type — check the Siemens support document for your specific tag.
The reader mounts with four M4 screws inside a cabinet; the front face is rated IP65, so it handles washdown in food or beverage lines as long as the sealing washer is seated. Dimensions are 90 mm wide, 62 mm high, and 23.5 mm deep — it fits a standard enclosure cutout without crowding adjacent gear.