Sigma Control Smart
Smart sits between Basic and Sigma Control 2 — it adds full logging and master-controller integration without the industrial-PC hardware.
Manufacturer
Kaeser
Display
Graphic monochrome display with soft keys, plain-language messages.
Years produced
~2015 – present.
Power supply
24 VDC internal supply.
Ambient range
0 – 45 °C.
Protection rating
IP54 front.
Relay outputs
Motor contactors, inlet/venting solenoids, dryer enable, common alarm, remote-run.
Used on
- Kaeser ASD / BSD small-to-mid rotary screws
- SM / SK / AIRCENTER units above the Basic tier
Features
- DUAL / QUADRO / VARIO control modes
- Full maintenance counter set with plain-language prompts
- Event and alarm memory with hour stamps
- Sigma Air Manager 4.0 integration
Interfaces
- Modbus RTU / TCP (option)
- Sigma Network Ethernet (select builds)
- Volt-free contacts
Sensor inputs
- Airend discharge temp (PT1000)
- Internal pressure
- Network pressure
- Separator ΔP (option)
Fault code lookup
First checks
- Fluid level and condition
- Cooler and aftercooler fouling
- Thermostatic valve element
First checks
- PTC resistance cold
- Balanced amp draw
- Starts per hour
First checks
- Loop check at the terminal
- Shield grounded one end only
- Substitute sensor
First checks
- Verify three phases at the disconnect
- Swap two legs
First checks
- Do the work, reset only that counter
Fault list is non-exhaustive and firmware-dependent. Always confirm against the controller’s on-screen help or OEM manual.
Sensor pin resistance & signal values
Pin-level resistance and signal values for the sensor types this controller uses. Works offline. De-energise the panel and lift one lead before ohming any element.
Wiring notes
- When joining a Sigma Network, use the dedicated Ethernet port — the service laptop port is not the fieldbus port
- Keep PT1000 leads away from motor leads; induced noise shows as temperature spikes
Known issues & field notes
- Firmware mismatch with an older Sigma Air Manager causes intermittent 'device not found' on the master
Operator menu open; service level requires a Kaeser dealer code.
Manuals & literature
Kaeser — support portal
Manuals gated — request via local rep or parts portal
Your manuals
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