Elektronikon Mk5 / Mk V (Graphic & Touch)
Mk5 replaces Mk IV (monochrome). SMARTLINK cloud data-logger is a common retrofit and lets you see ΔP, hours, and events remotely. Be careful editing pressure setpoints — narrow deadbands cause motor short-cycling on load/no-load units.
Manufacturer
Atlas Copco
Display
Graphic: 3.5" (small frames) or 4.3" (larger) TFT color, hard buttons. Touch: 7" capacitive TFT with icon menu.
Years produced
Mk5 ~2012 – present. Graphic variant is 3.5"/4.3" color; Touch variant is 7" capacitive introduced ~2018.
Power supply
24 VDC internal PSU from 100–240 VAC transformer tap. RTC battery-backed.
Ambient range
0 – 46 °C cabinet ambient. Derate touch panel above 40 °C ambient.
Protection rating
IP54 front (Graphic), IP65 front (Touch), IP20 rear.
Relay outputs
8–16 configurable (star/delta/main, blowdown, dryer, alarm, load, service due, remote general).
Replaces
Elektronikon Mk IV (monochrome LCD), Elektronikon II
Used on
- Atlas Copco GA 7–110 (fixed & VSD / VSD+)
- Atlas Copco GX 2–11
- Atlas Copco ZR / ZT / ZE (oil-free)
- Atlas Copco G / L series retrofit
- OEM-branded builds (Chicago Pneumatic industrial screws)
On AirCompDX
Features
- SMARTLINK remote monitoring (basic Energy tier included on new units)
- Delayed second stop (DSS) energy saver
- Week timer with 4 configurable weeks + holidays
- Multi-unit sequencing (ES 6i, ES 16, ES 130i)
- VSD ramping and speed logs (VSD / VSD+ units)
- Password-protected service level and machine-configuration levels
Interfaces
- Ethernet RJ45 (Modbus TCP, SMARTLINK cloud)
- USB service port (firmware, logs)
- Optional Profibus / Profinet / DeviceNet / EtherNet/IP module
- 24 VDC digital I/O
- Optional dry-contact expansion IO (ES i sequencing)
Sensor inputs
- Element outlet temperature (PT100 / PT1000)
- Element outlet pressure (4–20 mA)
- Net (delivery) pressure (4–20 mA)
- Cooling water outlet temperature (water-cooled units)
- Oil pressure (units so equipped)
- Ambient temperature
- Optional dryer dewpoint
Common fault codes
First checks
- Check oil level, cooler fins, and fan operation
- Verify thermostatic bypass valve seats & opens
- Check ambient temp and enclosure airflow
First checks
- Reset MPS
- Check FLA, phase balance, and cable termination
- Look for downstream mechanical binding
First checks
- Check oil level and filter ΔP
- Bleed oil pump / verify pump rotation
- Check pressure sensor calibration
First checks
- Clean cooler and fan blade
- Check fan bearings for drag
- Verify fan contactor and overload settings
First checks
- Check dryer condenser cleanliness
- Verify refrigerant compressor runs
- Look for high dewpoint alarm & drain function
- Check refrigerant HP switch
First checks
- Perform scheduled service kit
- Reset the correct service timer in Service menu
- Log actuals in maintenance record
First checks
- Check inlet valve closes on unload
- Verify blowdown solenoid opens
- Inspect MPCV
First checks
- Read drive keypad F-code
- Check drive cabinet filter for pluggage
- Verify DC bus discharged before service
First checks
- Release E-stop
- Check remote loop jumper
- Confirm 24 V on safety input
First checks
- Verify all 3 phases
- Swap any two phases at disconnect
- Check phase monitor
First checks
- Test drain manually
- Clear Y-strainer
- Check 24 V on drain solenoid
First checks
- Reseat module
- Check CAN or RS-485 wiring & termination
- Cycle 24 V
First checks
- Check Ethernet link light
- Verify DNS / outbound 443
- Reboot gateway
Fault list is non-exhaustive and firmware-dependent. Always confirm against the controller’s on-screen help or OEM manual.
Wiring notes
- 24 VDC internally regulated from 100–240 VAC transformer tap
- Expansion I/O modules snap onto DIN rail and address via rotary switches
- Star-delta and Y-Δ starters wired through K1/K2/K3 relay outputs; VSD units via Modbus RTU to Neos drive
- PT100 sensor cables must be shielded, three-wire, and NOT paralleled to power
Terminal & connector map
Pinouts distilled from OEM wiring diagrams. Exact silk-screen labels and pin numbering vary by hardware revision and package options — always confirm against the machine’s as-built wiring diagram before landing a wire.
Connectors to the controller
- 1X1 – 24 VDC control power (screw terminals, top of module)
- 1X2 – CAN expansion bus to Elektronikon expansion modules (blowdown, dryer, oil-cooler fan control)
- 1X3 – RS-485 for MODBUS RTU / Elektronikon multi-machine sequencer
- 1X4 – RJ45 Ethernet, MODBUS TCP / SMARTLINK cloud gateway
- 1X5 / 1X6 – PT100 / PT1000 sensor block (element outlet temp, ambient)
- 1X7 / 1X8 – 4–20 mA transducer block (vessel pressure, oil pressure, ΔP options)
- 1X9 – digital I/O to starter (K1/K2/K3, blowdown, remote start/stop, alarm)
1X1Control power
| Pin | Signal | Type | Connects to |
|---|---|---|---|
| + | +24 VDC | 24 VDC | Unit control transformer |
| − | 0 V | 24 VDC ret. | Unit control transformer |
| PE | PE | PE | Cabinet ground |
1X5/1X6 – TemperaturePT100/PT1000 inputs
| Pin | Signal | Type | Connects to |
|---|---|---|---|
| 1 / 2 / 3 | TT11 element outlet temp | PT100/1000 3-wire | Airend discharge sensor |
| 4 / 5 / 6 | TT90 aftercooler out (option) | PT100/1000 | Aftercooler sensor |
| 7 / 8 | Ambient (option) | PT1000 2-wire | Ambient sensor |
Confirm PT100 vs PT1000 on the machine data plate — early G-series shipped PT100.
1X7/1X8 – Pressure & ΔP4–20 mA transducers
| Pin | Signal | Type | Connects to |
|---|---|---|---|
| PT20 +/− | Vessel / net pressure | 4–20 mA | PT20 transducer |
| PT21 +/− | Oil pressure (screw) | 4–20 mA | PT21 oil sensor |
| ΔP oil +/− | Oil filter ΔP (option) | 4–20 mA | Filter ΔP transducer |
| ΔP sep +/− | Separator ΔP (option) | 4–20 mA | Sep ΔP transducer |
1X9 – Digital I/OStarter / remote / alarm
| Pin | Signal | Type | Connects to |
|---|---|---|---|
| K1 | Main contactor coil | 24 VDC out | K1 main contactor |
| K2 | Star contactor coil | 24 VDC out | K2 star contactor |
| K3 | Delta contactor coil | 24 VDC out | K3 delta contactor |
| Y1 | Blowdown solenoid | 24 VDC out | Y1 blowdown |
| RS+/RS− | Remote start (dry) | dry contact in | Customer PLC |
| RE+/RE− | Remote emergency stop (dry) | dry contact in | Remote E-stop chain |
| GA1/GA2 | General alarm relay | relay out | Master alarm / BMS |
Known issues & field notes
- GA VSD+ inverter over-temp when drive cabinet filter is clogged — check quarterly in dusty plants
- SMARTLINK cellular gateway (older) loses 3G — replace with LTE gateway
- Touch screen calibration drift after firmware update — recalibrate from service menu
- USB stick recognition: FAT32, single partition, ≤32 GB
Retrofit notes
Mk IV → Mk5 retrofit exists for many G/L/GA legacy frames; sensor loom pin-outs differ (PT100 vs PT1000 in some early units).
Programmable Service password protects setpoints and timer resets. Machine-configuration level requires dealer key.
Manuals & literature
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