For connection of further 4 video sources the external video extension board IS-SLOT-4 is available. It can be attached at plug J12 – J15 with FALCONquattro (ST1 – ST4 with FALCONquattro Express) by means of a flat ribbon cable. Video sources can be connected via BNC sockets. Following figure shows the video extension board with flat cable for connection of further 4 video sources via BNC sockets.

Fig. 31: Video extension board with 4 BNC sockets (IS-SLOT-4)
The pin assignment of J11 is described in the appendix (Extension board IS-SLOT-4).