I'm getting increasing numbers of enquiries regarding contacts for double leaf doors / two roller shutter contacts on one roller etc so have added the following page to our website as most of our Grade 2 and Grade 3 have this function:
http://www.knightfireandsecurity.com/news.asp
Each individual product page contains a downloadable wiring diagram showing how this is achieved, whether it be by selectable resistor headers for the surface range, resistor modules on the flush multi or coloured wires for armoured sleeved products.
Our flush multi product for example can be wired using 2+ contacts if required, shown in the diagram below (Galaxy example):
As always, any queries then drop me a line