6ES7307-1KA02-0AA0 24V 10A Power Supply

Key Features and Technical Specifications

• Input voltage: Automatic range selection for 120 V or 230 V AC; accepts 85...132 V AC or 170...264 V AC.
• Output: Regulated, isolated 24 V DC, rated 10 A, with a typical efficiency of 90%.
• Buffering: Maintains output for at least 20 ms during power failure at rated load.
• Protection: Short-circuit proof with electronic shutdown and automatic restart; overvoltage protection shuts down below 28.8 V.
• Isolation: Galvanic isolation between input and output; safety extra-low voltage per EN 60950-1 and EN 50178.
• Mounting: Fits on S7 rail; dimensions 80 × 125 × 120 mm; net weight 0.8 kg.

One standout spec is the response time: the output voltage settles within 0.1 ms under rapid input fluctuations. This fast loop keeps sensitive S7-300 CPUs from resetting during transient events.

Real-World Applications

In automotive assembly lines, the 6ES7307-1KA02-0AA0 powers PLC I/O modules and sensors. Its wide input range handles unstable site power, while the 20 ms buffering bridges brief dips. For packaging machinery, the clean 24 V bus reduces nuisance faults. Moreover, the Class I protection and IP20 rating suit standard industrial enclosures.

Installation and Setup

Mount the supply onto an S7 rail using the integrated latch. Maintain 40 mm clearance above and below for convection cooling. Connect input phase (L), neutral (N), and protective earth (PE) using screw terminals rated for 0.5...2.5 mm² wire. For the output, use the four L+ and M terminals to distribute 24 V to multiple loads. Always use a miniature circuit breaker rated 10 A, characteristic C, as recommended.

Maintenance and Reliability

With an MTBF of 1,504,280 hours at 40 °C, this supply offers long service life. Periodically inspect terminal torque and check for dust buildup on the enclosure. Because the unit has no user-serviceable parts, avoid opening it; instead, verify output voltage with a multimeter during routine checks. The green LED indicates 24 V OK, simplifying diagnostics.

Solving Power Stability in S7-300 Control Panels

When a control cabinet suffers voltage sags or brownouts, the Siemens 6ES7307-1KA02-0AA0 regulated power supply steps in to maintain a clean 24 V DC bus. This SIMATIC PS307 unit accepts 120/230 V AC single-phase input and provides a regulated 24 V DC output rated at 10 A. For engineers upgrading legacy S7-300 racks, this supply ensures consistent logic power even when line conditions fluctuate.

Compatibility and Integration

Designed for SIMATIC S7-300, this power supply works with Siemens PLC racks. It also suits other 24 V DC loads within its 10 A rating. The isolated output prevents ground loops, and the screw terminals accept standard ferrule wiring. For hazardous areas, the unit carries IECEx and ATEX approvals for Zone 2 gas groups, expanding its deployment options.

Troubleshooting and Common Issues

If the output LED is off, check input voltage and fuse. The internal fuse is not accessible; verify upstream breaker. For repeated trips, measure load current—exceeding 10 A triggers current limitation at 11...12 A. Should the supply shut down due to overvoltage, it restarts automatically once the fault clears. Always confirm wiring polarity before power-up.

Product Support and Availability

AutoDCSTech stocks the Siemens 6ES7307-1KA02-0AA0 power supply. Contact our team for current lead times and bulk pricing. We ship worldwide with secure packaging.