What the ratings mean for fit
The Siemens 6SL3211-1PE31-1UL0 is a SINAMICS G120 PM240-2 Push Through power module rated for 45 kW high overload (HO) and 55 kW low overload (LO) on a 3-phase 380-480 VAC supply. The HO rating drives the sizing decision: it delivers 200% overload for 3 seconds, 150% for 57 seconds, and 100% for 240 seconds at ambient up to 50 °C — meaning it can handle the starting surge of a loaded conveyor or pump without derating the drive frame. The LO rating at 55 kW applies when the load profile stays under 150% for short peaks and ambient stays at 40 °C. The built-in braking chopper handles regenerative energy from vertical loads or fast deceleration, eliminating the need for an external brake resistor on many applications. This module is IP20 protected, so it mounts inside a control cabinet — not on the machine frame in washdown areas. The Push Through design lets the heat sink protrude through the enclosure back panel for better thermal management, which matters when the drive runs near its 45 kW HO limit in a sealed cabinet.
Deployment context
This power module requires a separate SINAMICS G120 Control Unit (CU) — it ships without one. The CU slots onto the module's interface; the approved firmware baseline is V4.7 SP6. The Push Through frame measures 615 x 354 x 237 mm (H x W x D), sized for a standard cabinet cutout. The built-in braking chopper saves panel space on applications needing dynamic braking, such as hoists, centrifuges, or unwinders.