Smart staircase switch

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28.62 €
Your price with tax
34.63 €
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Intelligent staircase switch with the possibility of output signalling before switching off


  • Combines the functions of the original CRM-42 / CRM-42F relays and adds new ones.
  • Staircase switch enables delayed switching off of lighting on stairs, corridors, entrances, common areas or for delayed running of fans in the toilet or bathroom.
  • The intelligent staircase switch offers similar application possibilities as the CRM-4, while it is possible to extend the delay for functions a, b repeatedly by briefly pressing the control button (s). Each short press multiplies the time set by the potentiometer, i.e. setting the potentiometer to 2 minutes with three presses extends the delay up to 6 minutes. The maximum value of such an extended delay will always be 30 minutes, regardless of the number of presses. On the other hand, a long press (> 2 s) can switch off the output prematurely and end the ongoing delay.
  • Possibility to select a function with signalling (function a) or without signalling (function b) of the output by flashing 40s and 30s before the delay expires.
  • Output contact handles surge currents up to 80A
  • Control input with the possibility of loading up to 100mA load (glim lamp, LED in the button, etc.)
  • Function (selectable by potentiometer on the front panel) 
    a – STAIRCASE SWITCH, programmable with signalization
    b – STAIRCASE SWITCH, programmable without signalization
    c – MEMORY LATCH (press to switch on, press to switch off)
    d – MEMORY LATCH with delay
    ON (permanently closed) - e.g. during cleaning, moving
    OFF (permanently open) - e.g. when replacing luminaires
  • Adjustable time range 0.5… 10 minutes.
  • 3-wire or 4-wire connection (input S can be controlled by potential A1 or A2) 


Technical parameters

  • Voltage Range: AC 230V (AC 50 – 60Hz)
  • Maximum consumption: 3 VA / 1.6 W
  • Output contact: 1x switching / SPST-NO 16A (AgSnO2), switching potential A1
  • Functions available: 6
  • Mounting: DIN rail EN 60715 
  • LED indication: input - green, output - red
  • Protection degree: IP40 from front panel / IP10 terminals
  • Dimensions:  90 x 17.6 x 64 mm (3.5 x 0.7 x 2.5 inch)
  • Weight: 56 g (2 oz)
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ELKO EP, s.r.o., Holešov

We develop, manufacture and deliver complete solutions for your electrical wiring. Czech company with more than 23-year tradition is a brand iNELS Smart Home Solution. One of the most comprehensive solutions on the market brings together wireless solutions and intelligent bus wiring. With this system you control heating, air conditioning, lighting and everything is perfectly secure. We are here for you from design to implementation and configure the system, thanks to our team of trained experts and partners.

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