Communication Module | Siemens | 6ES7505-0KA00-0AB0 SIMATIC S7-1500 System power 6ES7505-0KA00-0AB0

Product Description: Siemens 6ES7505-0KA00-0AB0

The Siemens 6ES7505-0KA00-0AB0 is a dedicated system power supply for the SIMATIC S7-1500 PLC family. It converts a nominal 24 V DC input into a regulated 24 V DC, 25 W output that feeds the PLC’s backplane bus, ensuring stable operation of CPUs and I/O modules. The PS 25W features built- in short- circuit and reverse-polarity protection, as well as 20 ms of buffering in the event of a supply interruption, allowing orderly shutdown or continued operation of critical functions 西门子支持 Industrial Automation Co. .

Key Features

• Output Power: 25 W to backplane bus
• Output Voltage: Regulated 24 V DC
• Input Current: 1.3 A at 24 V DC nominal
• Protections: Short-circuit protection, reverse-polarity protection
• Mains Buffering: 20 ms hold-up time on voltage dips
• Diagnostics: Front-panel status indicator LED
• Isolation: Primary/secondary isolation tested to 707 V DC
• Mounting: SNAP-in on S7-1500 rack; occupies one module slot
• Protection Class: IP20

Technical Specifications

• Rated Input Voltage: 24 V DC (19.2 … 28.8 V DC)
• Rated Output Voltage: 24 V DC
• Output Power to Backplane Bus: 25 W
• Rated Input Current: 1.3 A
• Power Loss at Nominal Conditions: 6.2 W
• Buffer Time on Supply Failure: 20 ms
• Protections: Short-circuit, reverse polarity
• Isolation Test Voltage: 707 V DC
• Operating Temperature: –25 °C … +60 °C (horizontal); –25 °C … +40 °C (vertical)
• Storage Temperature: –40 °C … +70 °C
• Dimensions (W × H × D): 30 mm × 125 mm × 118 mm
• Weight: ~ 0.36 kg

Application Areas

• Powering the backplane bus of SIMATIC S7-1500 PLC racks
• Ensuring uninterrupted CPU and I/O operation during supply dips
• Use in control cabinets requiring compact, reliable 24 V DC supply

Advantages

• Compact Design: Fits into one S7-1500 module slot, saving cabinet space
• Robust Protection: Built-in short-circuit and reverse-polarity safeguards
• Hold-Up Capability: 20 ms buffering prevents brief supply interruptions from causing system faults
• Easy Integration: Snap-in mounting on standard S7-1500 rail simplifies installation