product overview
Siemens 6EP1332-1SH71 (model PM1207) is a regulating power module designed specifically for SIMATIC S7-1200 series PLCs, belonging to the Siemens SITOP power supply family. This module, with its compact design, high reliability, and intelligent voltage regulation function, has become the core component of 24V DC power supply in industrial automation systems, especially suitable for stable power supply of S7-1200 controllers and their expansion modules.

Detailed explanation of core parameters
Input characteristics
Voltage range: Supports automatic switching between AC 120/230V, with input voltage ranges of 85-132V AC (low range) and 176-264V AC (high range), suitable for the global power grid.
Frequency: 50/60Hz compatible.
Input current: 1.2A at 120V, 0.67A at 230V, with overload protection function.
output characteristic
Output voltage: Stable 24V DC (SELV standard, no potential), voltage accuracy ± 0.2%.
Output current: rated 2.5A, instantaneous overload current up to 6A (during startup or short circuit).
Output power: Maximum 60W, residual ripple ≤ 150mV, peak voltage ≤ 240mV.
Efficiency: Typical efficiency of 83%, power loss of 12W (at rated load).
Physical and Environmental Characteristics
Dimensions: Width 70mm x Height 100mm x Depth 75mm, DIN rail installation.
Weight: Approximately 0.3kg, lightweight design.
Protection level: IP20, suitable for industrial environments.
Working temperature: 0-60 ℃ (natural convection), storage temperature -40-85 ℃, humidity 5-95% without condensation.
Protection and monitoring
Short circuit protection: constant current output, short circuit limited current 2.65A.
Overload protection: Instantaneous overload current of 6A, duration of 100ms.
Status indicator: The green LED displays "24V normal" and goes off when there is a fault.
Power failure buffer: Short time power outage cross connection time of 20ms to ensure system stability.
Certification and Compliance
Compliant with RoHS standards through UL, ATEX, GL, CE, UKCA, EAC, CCC and other certifications.
Compliant with international standards such as EN 55022 (Electromagnetic Compatibility) and EN 60950-1 (Safety).
Functional advantages
Intelligent voltage regulation
Automatic range switching: seamlessly adapts to 120V/230V power grids, reducing configuration complexity.
Wide input voltage tolerance: Maintain stable output even when the input voltage fluctuates by ± 15%, adapting to unstable voltage environments.
High reliability design
Parallel expansion capability: Supports parallel connection of two modules, increasing output current to 5A to meet high load requirements.
Protection level: IP20 protection, dustproof and anti electric shock, suitable for industrial sites.
Redundant design: Key components are redundant, with an MTBF (Mean Time Between Failures) of 492537 hours.
Usability and Maintenance
Compact installation: DIN rail or screw installation, saving space.

Application scenarios
industrial automation control
PLC power supply: provides stable power supply for S7-1200 CPU, signal module, and 24V loads (such as sensors and actuators).
Production line integration: Ensuring the continuous operation of automation equipment in scenarios such as automotive manufacturing and electronic assembly.
Buildings and Infrastructure
Building automation: Power the PLC and I/O modules of air conditioning, lighting, and security systems to achieve intelligent control.
Energy management: Support monitoring devices in renewable energy systems, such as solar inverters for data collection.
Special environmental applications
Explosion proof area: certified by ATEX and ULhazloc, suitable for explosion-proof scenarios such as petrochemicals.
Ship and Rail Transit: Compliant with DNV, LRS and other classification societies to ensure the safety of power supply for marine and transportation equipment.