We have some very old delmatic lighting control modules that have pcb and relays for switching they have mostly burnt out. I need to change them for a modern control, I was thinking vitesse plus bit would the no volt switching work with this or should I just use a pir? Cp electronics want to charge £500 a day for a site visit. I could upgrade these myself but wondered if anyone has advice or a better solution? This is a large office space with emergency and standard fittings.