Atlas: Copco Elektronikon Mk5 Wiring Diagram

The Mk5 operates on 24V DC, but it controls high-voltage machinery. The diagram separates the "Control Voltage" (24V) from the "Main Power" (380V/480V). Understanding this separation is vital for safety.

| Symptom | Likely Wiring Problem | Check | | :--- | :--- | :--- | | MK5 screen dead | No 24V DC | Measure at X1 pins 4-5; check transformer secondary fuse. | | E-stop error on display | Wiring open | Short X2.1 to X2.2 (temporarily for test only). | | Motor doesn’t start | K1 output not closing | Check if pressure demand OK; measure voltage across MK5 relay K1 pins. | | Analog reading fixed at 4 mA | Sensor wire break | Loop test: put 250Ω across 4-20mA input → should read 20 mA. | | Communication timeout | Wrong Modbus termination | Add 120Ω resistor between D+ and D- at last device. | atlas copco elektronikon mk5 wiring diagram

The Mk5 monitors the compressor via digital and analog inputs. The Mk5 operates on 24V DC, but it