It was specifically designed for this purpose. Presently comes in PG8 or DX flavours. P.S. we are ISO 9001:2000 accredited Best regards, Geoff G.J.Harbach I.Eng MIED IIPEM Clinical Technologist Special Controls Service Manager West Midlands Rehabilitation Centre 91 Oak Tree Lane, Selly Oak Birmingham, West Midlands, B92 6JA Tel 0121 627 1627 Ext. 53238 Do you ever use this relay box to route switches to/from a powered chair as well? If so did you Risk Assess it for this use??? Interested since we are currently designing a system that could include something similar. Cheers. Simon Simon Judge Electronic Engineer MEng [log in to unmask] 020 8770 8283