230 V AC supply, 50/60 Hz, 6 W — panel-fit note
The 6ES7171-3AA00-0AA0 is a Siemens SIMATIC S7-300 expansion module powered by a 230 V AC supply, rated for both 50 Hz and 60 Hz mains. Active power draw is 6 W, so the thermal contribution inside a sealed enclosure is low — no forced ventilation required for this module alone, though the cabinet's overall heat load still governs. The IP20 housing confirms finger-safe access but no moisture or dust ingress protection — keep it behind a cabinet door.
Operating range 0 to 55 °C — enclosure ambient matters
Rated for 0 °C minimum and 55 °C maximum ambient — standard for equipment mounted inside a ventilated industrial enclosure. If the panel sits near a furnace or in direct sun, the internal temperature rise from other components must stay below 55 °C at the module's intake. Storage and transport range is wider: -40 to 70 °C. Horizontal mounting position is specified; vertical installation would alter natural convection across the module and may reduce the usable temperature ceiling. The mounting clips secure it to a DIN rail or panel plate.
EMC and immunity — industrial floor ready
EMC interference emission meets limit value class A to EN 55011 group 1 — this module is intended for industrial environments, not residential or light-commercial zones where class B limits apply. Radiated immunity is tested to 10 V/m from 80 to 1000 MHz, with reduced levels at higher frequencies per IEC 61000-4-3. Electrostatic discharge immunity is 4 kV contact / 8 kV air discharge per IEC 61000-4-2 — typical for equipment installed in a grounded metal enclosure where ESD events are rare but possible during maintenance.
Wiring and supply connection
The supply voltage connects via a 2-pole connector, accepting solid conductors from 0.2 to 2.5 mm² or finely stranded wire with end processing from 0.25 to 2.5 mm². AWG equivalents are 24 to 12. The relative symmetrical tolerance on the AC supply is 5 % — a 230 V nominal rail can sag to 218.5 V or rise to 241.5 V without tripping the module. No current or voltage measurement function is built in — this is a pure expansion module, not a metering device. If load monitoring is needed, it must come from an upstream instrument or a dedicated measurement module in the rack.
Compliance and certifications — global BOM fit
Carries CE, KC (Korean), and EAC (Eurasian) approvals plus China RoHS compliance. No UL or CSA mark is listed in the spec record — verify with the local Siemens office if a North American listing is required for your panel build.