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440 Input Unit

Input Unit (440)

The DIGIDIM Input Unit is a DALI-compatible interface designed to allow customer specified switches, sensors, time clocks or other on/off control devices to be incorporated into a DIGIDIM lighting control system. It has 8 volt-free inputs, which can be either momentary or latching, permitting the selection of DALI commands.


Key Features

  • Out-of-box operation using the default functions shown:

Switch 1 Recall Scene 1

Switch 2 Recall Scene 2

Switch 3 Recall Scene 3

Switch 4 Recall Scene 4

Switch 5 Raise light level

Switch 6 Lower light level

Switch 7 Maximum light level

Switch 8 Off

  • Status LED gives visual indication of units current

operational mode: normal operation, initialisation,

physical selection or input activation.

  • Physical/Mode selection switch.
  • Can be used with momentary or latching switches.
  • Fully programmable using DIGIDIM Toolbox software.


Installation Notes

  • The screen (SC) connection on this unit must be connected to earth to ensure correct operation.
  • No more than 50 m of cable should be used between the actuating switch and the input to the unit.


Technical Data

Voltage-free Switched Inputs

Connections: 1–8 inputs (active low)

COM Input Ground*

* If required, these connections can be externally linked to provide a common connection

Voltage pins 1–8: 5 V nominal with switch open, must be less than 2 V switch closed

Overload protection: ± 35 V

Short-circuit current: 0.5 mA maximum

Debounce period: 50 ms


DALI: Standard DIGIDIM terminal block, up to 1.5 mm² solid or stranded

Inputs: Up to 4 mm² solid core or up to 2.5 mm² stranded. Maximum cable length should not exceed 50 m on each input.


DALI supply output: None (Use external DALI power supply)

DALI consumption: 10 mA

Mechanical data

Dimensions: DIN-rail case 70 mm wide

Weight: 110 g

IP code: IP20

Operating conditions

Ambient temperature: 0 °C to +35 °C

Relative humidity: Max. 90 %, noncondensing

Storage temperature: –10 °C to +70 °C

Conformity and standards

EMC emission: EN 55015

EMC immunity: EN 61547

Safety: EN 60950

Isolation: 4 kV

Environment: Complies with WEEE and RoHS directives




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