Siemens 6ED1051-4RS10-0BA1 Kaeser Sigma Control Basic

Siemens 6ED1051-4RS10-0BA1 Kaeser Sigma Control Basic (A5E02409959)

The Siemens 6ED1051-4RS10-0BA1 (Kaeser OEM Part Number A5E02409959) is a specialized, ruggedized industrial controller and operator interface panel custom-engineered by Siemens for Kaeser Kompressoren. Derived from the proven Siemens LOGO! logic architecture, this unit serves as the primary automation brain and HMI (Human-Machine Interface) for Kaeser rotary screw air compressors equipped with the Sigma Control Basic system.

The module monitors critical operational parameters—including final compression temperature (Pt100), network and internal system pressure (0–20 mA), motor load current, and differential filter drop. It manages automated Dual/Quadro load-unload cycles, emergency shutdown trips, service intervals, and run-hour logs via its backlit monochrome LCD display and tactile keypad.

Model Details

• Manufacturer: Siemens
• Siemens Ordering Part Number (MPN): 6ED1051-4RS10-0BA1 (also referenced as 6ED1 051-4RS10-0BA1 / 6ED10514RS100BA1)
• Kaeser Material / Hardware Part Number: A5E02409959
• Firmware Platform: Kaeser Sigma Control Basic
• Control Platform: Customized Siemens LOGO! Marine/Industrial Micro-PLC

Features

1. OEM-Integrated Micro-PLC Architecture: Built upon Siemens industrial automation technology with proprietary Kaeser compressor control algorithms pre-programmed in non-volatile EEPROM.
2. Hybrid Power Supply Compatibility: Supports direct multi-voltage control cabinet wiring at 115V AC nominal (or 15V AC / 24V DC depending on sub-panel transformer tapping).
3. Dedicated Compressor I/O Layout: Configured with 6 discrete digital inputs, 1 analog current loop input (0–20 mA for piezoresistive pressure transmitters), and 1 dedicated RTD input for direct Pt100 temperature monitoring.
4. High-Current Electromechanical Relay Outputs: Features 5 heavy-duty SPST/SPDT relay channels rated at up to 3A @ 250V AC for direct switching of line contactors, star-delta starters, and solenoid valves, paired with 1 solid-state transistor output (24V DC, 0.5A).
5. Ruggedized Vibration & Oil-Mist Resistance: Front fascia conforms to IP65 standards for installation directly on compressor soundproof enclosures, engine room bulkheads, or auxiliary machinery flats.

Technical Specifications

Compatibility

• Kaeser SX Series: SX 3, SX 4, SX 6, SX 8
• Kaeser SM Series: SM 9, SM 11, SM 12, SM 15
• Kaeser SK Series: SK 19, SK 21, SK 22, SK 25
• Kaeser ASK Series: ASK 28, ASK 32, ASK 34, ASK 40
• Industrial & Marine Auxiliary Packages: Compatible with factory Kaeser marine containerized deck compressor sets and skid-mounted plant utility skids equipped with Sigma Control Basic interface doors.

Part Number Cross-References

• Siemens Industrial MPN: 6ED1051-4RS10-0BA1 / 6ED1 051-4RS10-0BA1
• Siemens Global Barcode / SKU: 6ED10514RS100BA1
• Kaeser Kompressoren Part Number: A5E02409959
• Functional Successor / Equivalent Revisions: 6ED1051-4RS10-0BA2, 6ED1051-4RS10-0BA3 (A5E03974934)

Frequently Asked Questions

What causes a “Communication Fault” or blank display on the 6ED1051-4RS10-0BA1?

A blank display or boot freeze typically points to an unstable incoming supply voltage, a blown primary transformer fuse, or internal capacitor failure in the DC power supply stage. First, verify with a multimeter that 115V AC (or 24V DC depending on cabinet feed) is steadily present at the supply terminals. If power is within +/-10% tolerance and the display fails to illuminate, the internal power regulator module has experienced component breakdown.

Can a generic off-the-shelf Siemens LOGO! PLC replace the Kaeser 6ED1051-4RS10-0BA1?

No. While the outer physical chassis is derived from the Siemens LOGO! series, the Kaeser Sigma Control Basic contains custom OEM firmware hard-coded into internal EEPROM. Standard Siemens LOGO! units from an electrical supply house lack the Kaeser control maps, proprietary menu structure, compressor safety fault matrices, and analog calibration curves required to run the machine.

How do I clear a “High Airend Discharge Temperature” fault after installing the replacement unit?

If the unit alarms immediately upon powering on, verify the Pt100 RTD connection across the dedicated temperature input terminals. An open-circuit (broken lead, loose screw clamp, or damaged probe) causes the controller to read infinite resistance, which translates to maximum temperature and triggers an instantaneous safety trip. Ensure the Pt100 sensor core measures approximately 107–110 ohms at room temperature (20°C–25°C).

Are the terminal blocks hot-swappable between old and replacement units?

Yes. The 6ED1051-4RS10-0BA1 utilizes modular plug-in screw terminal headers. During an emergency engine room or plant floor changeout, you can unseat the terminal plugs from the defective unit without disconnecting individual wires, mount the replacement chassis into the cabinet cutout, and firmly seat the headers into their designated sockets.