SM 4.7/20-GC16 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SM 4.7/20-GC16 is an AC inverter from the SM AC Inverters series. It features a CAN bus interface, operates with a peak current of 20 Amps, and has an IP20 protection type. The inverter supports a DC link voltage of 325 V DC and weighs 2.4 kilograms.
Internal Product Review
The SM 4.7/20-GC16 is a Bosch Rexroth Indramat AC inverter with a CAN bus interface and IP20 protection. A 10 kHz clock frequency and 20 A peak current give the unit crisp response and solid overload handling in controlled industrial panels. Clean thermal performance and dependable drive behavior make the inverter a strong choice for compact machine applications.
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Product Description:
The SM 4.7/20-GC16 inverter is produced by Bosch Rexroth Indramat within the SM AC Inverters series. The unit is an AC drive module that converts the plant’s DC bus energy into variable AC output for precise speed control of induction or synchronous motors on automated machinery. Through its CAN bus interface, it exchanges setpoints and diagnostic data with higher-level PLCs, making it useful for coordinated axis control and energy management in industrial automation lines. It is also suited for applications that require smooth speed changes and consistent motor response during repeated machine cycles.
The inverter’s internal modulation runs at a carrier frequency of 10 kHz, a switching rate chosen to reduce motor acoustic noise while keeping semiconductor losses within normal operating limits. When operated without a cooling fan, it can deliver a steady output of 4.7 A, whereas the addition of forced air increases continuous current capability to 11 A, allowing the same frame size to support larger motor loads. Its DC link is maintained at 325 V DC, and this voltage is switched through the IGBT bridge to produce adjustable phase voltages. For short acceleration bursts, the power stage tolerates a peak motor current of 20 A, providing added torque reserve during rapid indexing or heavy startups.
Thermal management is aided by a power dissipation of only 13 W, so enclosure heat rise remains low even when the drive is mounted close to other electronics. The housing carries an IP20 rating and follows climate class 3K3, so it is intended for control cabinets that are free of conductive dust and excessive humidity. Reliable operation is specified from 0 to +55 °C at installation heights up to 1000 m, while storage and transport are permissible down to -25 °C. The module weighs 2.4 kg and occupies a single slot on the SM system rack, which helps support compact cabinet layouts and keeps rail loading within common mounting limits.
