7ME6910-1AA10-1AA0 SIEMENS Power module

In PLC Systems (System Power Supply – PS): The module is typically a System Power Supply (PS) or a Load Power Supply (PM). Its primary role is to convert the incoming line voltage (AC or DC) into the stabilized operating voltages required by the internal backplane bus, the CPU electronics, and sometimes the I/O module circuitry ($24VDC$). It provides the necessary power integrity and electrical isolation for the reliable function of the entire automation rack.

In Drive Systems (Drive Power Module – PM): The module is the power section of a modular variable speed drive system (like SINAMICS). Its function is to convert the incoming line voltage (AC) into a controlled DC bus voltage, and then use integrated insulated-gate bipolar transistors (IGBTs) to generate the variable voltage and frequency output required to control a motor with high precision.

Product Parameters

Product Advantages

• System Reliability (PLC): Provides robust line buffering, ensuring the CPU maintains operation and saves critical data during brief power interruptions.
• Optimal Integration: Designed with the exact form factor, electrical interface, and diagnostic signaling required for seamless integration into the specific SIMATIC mounting rail and backplane bus.
• Scalability (Drive): In drive systems, the modular design allows the user to select the perfect combination of control unit and power module to precisely match the required motor power and application complexity.
• High Efficiency: Features high-efficiency power conversion topologies to minimize heat loss and reduce overall energy consumption in the control cabinet or drive system.
• Diagnostics and Status: Includes status LEDs and integrated diagnostics (e.g., overload, short-circuit, input voltage failure) that are reported back to the PLC/Control Unit, significantly speeding up troubleshooting.

Important Notes

• Power Budgeting (PLC): The maximum current output capacity of the power module must be correctly calculated to meet the combined power needs of the CPU and all connected I/O and communication modules. Overloading must be strictly avoided.
• Input Requirements: Always verify that the input voltage and frequency range of the module matches the local supply network. Incorrect connection can cause immediate damage.
• Heat Dissipation: Despite high efficiency, Power Modules generate heat. Sufficient ventilation or clearance spacing must be maintained, especially for high-power Drive Power Modules, to prevent overheating and premature failure.
• Wiring Standards: Use properly sized cables and adhere to grounding and protective earth standards as specified in the product manual for safety and EMC compliance.
• Braking Energy (Drive): If the application involves significant braking (deceleration) of high-inertia loads, a Power Module with an integrated or external braking chopper and resistor may be necessary to safely dissipate regenerative energy.

Product Applications

• PLC System Core Supply: Supplying electrical power to the CPU, main rack, and peripheral modules in central control cabinets across all industries (manufacturing, process, infrastructure).
• Distributed I/O Power: Providing power to remote I/O stations (e.g., ET 200MP) that are situated far from the main controller.
• Variable Speed Motor Control: (Drive PM) Used as the core of frequency inverters to precisely control the speed, torque, and position of induction motors or servo motors in applications like pumps, fans, conveyors, compressors, and machine tool axes.
• Automation Redundancy: Used in redundant power configurations to ensure continuous operation of critical automation systems even if one power source or module fails.