Inputs & Outputs

The following article contains the basic info about inputs and outputs of Unipi Extension modules. For detailed info and technical parameters of inputs and outputs, please visit the following subcategories:


Digital inputs (DI):
Designed to read TRUE / FALSE logic states represented by direct voltage levels (voltage / no voltage). Suitable for reading two-state sensors such as:

  • switches and buttons
  • water level sensors
  • motion sensors
  • window and other contacts
  • auxiliary contactors
  • and other binary sensors and devices

All digital inputs on Unipi Patron, Unipi Neuron, Unipi Axon and Unipi Extension devices feature counter functionality, ie. are equipped with a counter that is able to detect long pulses as well as very short high-frequency pulses.

More detailed info about digital inputs is available on this link.

Relay outputs (RO):
Primarily designed for switching ohmic loads, making ROs suitable for control of lightbulbs, thermoelectric valves, smaller heating elements, small pumps, door locks etc. ROs on Unipi units and extensions are rated for maximum current of 5A at 230 V~ or 30 V⎓.

More detailed info about relay outputs is available on this link.

Analog inputs (AI):
Analog inputs on Unipi Extension modules support the measurement of:

  • 0-10 V⎓ or 0-2.5 V⎓ voltage
  • 0–20 mA current
  • 0–1960 Ω or 0–100 kΩ (eg. PT1000 temperature sensor)

As such, AIs are suitable for reading values from both passive and active analog sensors.

More detailed info about analog inputs is available on this link.

Analog outputs (AO):
AOs are designed for the control of devices with analog control, such as three-way valves, lighting dimmers etc. Analog outputs on Unipi Extension devices support only 0-10 V⎓ direct voltage mode.

More detailed info about analog outputs is available on this link.