The 6ES7700-0AL00-0YA0 is a SIMATIC UD700 update device — a spare part for loading STEP7 and operator panel configurations onto SIMATIC C7 and S7 CPUs, specifically the 312IFM and 314IFM. It communicates via MPI over RS-485, the standard Siemens multi-point interface for programming and HMI connections on that generation of controllers.
Supply and approvals
Runs on 24 VDC nominal, with a permissible range of 15 V to 30 V DC. Typical current draw is 80 mA; maximum is 160 mA — light enough that a standard 24 VDC power supply can feed it without dedicated branch protection. Carries FM approval for Class I, Division 2, Groups A, B, C, D (hazardous locations), plus UL 1950 / CSA C22.2 No. 950. That FM stamp means it can sit in a Division 2 area without purging — relevant for oil/gas or chemical processing panels where the update device is mounted near the controller.
Environmental and mounting
IP65 on the front face, IP20 on the housing. That front seal lets it mount in a panel door subject to washdown splashes or dusty environments — the operator-facing side is protected while the rear stays open to the cabinet interior. Operating range is -20 °C to 70 °C, with humidity tolerance up to 95 % at 25 °C (non-condensing). Panel cutout dimensions: 144 mm wide × 72 mm tall × 27 mm deep — shallow enough for a standard enclosure door.