var timeout = 5 // sec

rule "Relais 1"
when
    Item relais1Switch received update
then

    if (relais1Switch.state == "ON")
    createTimer(now.plusSeconds(timeout)) [|
        relais1Switch.postUpdate("OFF")
        executeCommandLine("/etc/openhab2/scripts/relais.py 23 OFF")
    ]
end