<UL><LI>SI units with a maximum of 16 output points.</LI><LI>Three mounting types.</LI><LI>The SI unit is also available pre-assembled with some of SMC's most popular valve series: SY, SYJ, VQZ.</LI><LI>This saves the user from assembling the SI unit, valves and wiring to the manifold.</LI><LI>Integrated short circuit protection.</LI><LI>Additional output cables are available so that unused points on the SI unit can be utilised effectively.</LI></UL>