The MK5 digital output (e.g., DO1 on connector CON2, pin 6) sends a 24V DC signal to the coil of K1. The return path goes through the overload relay’s normally closed (NC) auxiliary contact (terminals 95-96).
When searching for "Atlas Copco Elektronikon MK5 wiring diagram full," note the version.
If you install an MK5 from a fixed-speed compressor into a VSD compressor without the correct full diagram, you will blow the 4-20mA output card instantly.
The Elektronikon Mk5 consists of a Display Unit and a separate Controller Unit (often mounted inside the cabinet). The wiring connects to terminal strips on the Controller Unit. atlas copco elektronikon mk5 wiring diagram full
Once you have the authentic PDF, it looks overwhelming. Here is how to read it using standard IEC symbols.
Before reading the diagram, know the physical components:
The wiring diagram is a ladder-style schematic, not an electrical line diagram. The MK5 digital output (e
The MK5 wiring diagram is machine-specific. You need your compressor’s serial number (on nameplate). Then:
Inside the MK5 controller:
Behind the electrical cabinet door: Some units have a laminated A3 print of the diagram. If you install an MK5 from a fixed-speed
The MK5 wiring diagram varies significantly by:
Always use the diagram that matches your exact compressor serial number (ES number).