The 6ES7272-0AA30-0YA0: Rated for the front panel with IP65 protection, it fits a 138 mm by 68 mm cutout and handles ambient air from -40 °C to 70 °C. Power can be supplied via the S7-200 communications interface or an optional external 24 V DC unit – the CPU sensor supply is not loaded. Current draw is 120 mA max.
Panel mounting: cutout dimensions 138 mm wide by 68 mm high, accepts panel thickness 0.3 to 4 mm. The front frame seals to IP65; the cabinet rear is not rated. Depth behind panel is 27 mm. The cable (2.5 m) and installation accessories are included. RS-485 physics with PPI protocol – up to 126 nodes on the S7-200 network including PG/PC. Node addresses must not conflict with other OP, TP, TBP devices.