Technical Specifications

FAQ

Q1: What type of product is the Siemens 6AG1210-1PE21-2UL0?

The Siemens 6AG1210-1PE21-2UL0 is a PM240-2 Power Module from the SIPLUS SINAMICS G120 series. It is not a conventional PLC power supply module. It is designed for SINAMICS G120 variable frequency drive systems and converts the incoming three-phase AC supply into electrical power suitable for motor operation. This model features an FSB frame size and a low-overload power rating of 7.5 kW, making it suitable for industrial motor speed control and drive applications.

Q2: What is the difference between the 6AG1210-1PE21-2UL0 and a standard SINAMICS G120 Power Module?

The 6AG1210-1PE21-2UL0 is based on the standard model 6SL3210-1PE21-8UL0 and belongs to the Siemens SIPLUS product range. Its printed circuit boards feature conformal coating, which improves resistance to certain environmental contaminants. The specified operating temperature range is -20 to +50 °C, making it suitable for industrial installations with more demanding environmental conditions. However, the conformal coating does not change the module’s IP20 protection rating.

Q3: What are the input power requirements for this Power Module?

The 6AG1210-1PE21-2UL0 operates with a three-phase AC power supply. Its input voltage range is 380–480 V AC, with an allowable voltage tolerance of ±10%. The input frequency range is 47–63 Hz. Before installation, engineers should verify the incoming supply voltage, phase sequence, grounding arrangement, and upstream protective devices. Phase loss, unstable voltage, or incorrect wiring may prevent normal startup and trigger drive fault alarms.

Q4: What do the 7.5 kW and 5.5 kW power ratings mean?

The 7.5 kW rating refers to Low Overload (LO) operation, while 5.5 kW refers to High Overload (HO) operation. These operating modes have different overload capabilities and duty-cycle requirements. Low-overload operation is generally suitable for applications with relatively stable loads, while high-overload operation is intended for equipment requiring higher starting torque or greater short-term load capacity. Selection should consider the motor’s rated power, load variations, starting requirements, and actual operating cycle.

Q5: Does the 6AG1210-1PE21-2UL0 support an external braking resistor?

Yes. This Power Module includes an integrated braking chopper and can be connected to an external braking resistor. During motor deceleration or braking, the motor may generate regenerative energy that is fed back into the DC link. The braking chopper controls the connection of the resistor, allowing excess energy to be dissipated as heat and helping prevent excessive DC-link voltage. The resistor’s resistance, power rating, and duty cycle must be selected according to the actual braking requirements and manufacturer specifications.

Q6: Is this model suitable for harsh industrial environments?

The 6AG1210-1PE21-2UL0 features conformal-coated circuit boards to improve resistance to certain environmental contaminants, including selected chemically active substances, salt mist, and oil-related influences. Its specified operating temperature range is -20 to +50 °C. However, the module has an IP20 protection rating and should not be directly exposed to water, corrosive liquids, or heavy conductive dust. Installation in a suitable electrical cabinet with adequate ventilation and heat dissipation is recommended.

Q7: How should technicians troubleshoot an overloaded 6AG1210-1PE21-2UL0 or a module that cannot drive a motor?

First, verify that the three-phase input voltage is within the specified range and check that the upstream circuit breaker and power supply are operating correctly. Next, review the drive status indicators and fault history for overload, overvoltage, undervoltage, ground faults, and cooling problems. Measure the motor’s actual operating current and inspect the motor cables, output terminals, and braking circuit for short circuits, loose connections, or insulation problems. Also verify that the motor data and drive control parameters are configured correctly. Before inspection, isolate the power supply and allow the DC-link capacitors to discharge according to the equipment safety instructions.

Q8: What should be checked when replacing the Siemens 6AG1210-1PE21-2UL0?

Before replacement, verify the complete order number, base model, power rating, input voltage, overload capacity, frame size, and braking chopper configuration. Compatibility with the SINAMICS G120 Control Unit, firmware version, motor parameters, and external braking resistor must also be confirmed. This model does not include a Control Unit or operator panel, so the existing control hardware should be checked for compatibility. After installation, review the motor’s rated parameters, protection settings, and drive configuration before performing a test run. Installation and commissioning should be carried out by qualified electrical personnel.