SIMOTION D4x5-2 — what's in the box
The Siemens 6SL3040-0NA00-0AA0 is a SIMOTION D4x5-2 control unit — the brains for multi-axis motion on a SINAMICS S120 drive backbone. Four DRIVE-CLiQ ports let it talk directly to servo and vector drives, and it packs four digital I/O onboard for basic handshaking or limit-switch capture. No fan means one less failure point in a dusty panel, but you need to keep the ambient under 55 °C and the airflow path clear — the 20 W typical loss has to go somewhere. Power it from a 24 V supply (20.4 to 28.8 V range), and the digital inputs read 15–30 V as a logic '1', -3 to +5 V as a '0'. Response is fast enough for most line-side signals: typical rise time 150 µs, max 400 µs; fall time max 100 µs. The outputs switch resistive loads at up to 100 Hz, inductive at 2 Hz, and lamps at 11 Hz — watch the inductive derating if you're driving contactor coils directly. The unit is rated for 0 to 55 °C operation, 5 to 95 % humidity non-condensing, and storage/transport from -40 to +70 °C. Air pressure range 700 to 1060 hPa covers most altitudes up to about 3000 m. IP20 / UL open type means it belongs in an enclosure, not on the shop floor.
The module measures 25 mm wide, 380 mm tall, and 270 mm deep — or 230 mm deep if you remove the spacer. That's a tall, narrow footprint that slides into a standard DIN-rail enclosure but needs vertical clearance. No electrical isolation between the logic and I/O circuits, so keep the 24 V supply clean and share a common ground reference with the drives. The making current is 1.6 A typical at power-up — factor that into your 24 V supply sizing. Short-circuit protection is built in on the outputs, so you don't need external fuses for the I/O lines, but the main 24 V feed still needs its own protection.
Carries cULus for the US and Canada, plus RCM (formerly C-Tick) for Australia. That covers the major industrial markets. No CE mark is listed in the evidence, but as a Siemens industrial product it typically meets CE — verify your local requirements at order time.