SMC EX120-SAS4 Serial Transmission System MSRP: Now: $156.70 Was: serial interface unit ex120 controls up to 16 solenoid outputs and is compatible with series sv1000/2000/3000/4000, vq1000/2000, sx3000/5000 and sy3000/5000 valves. available protocols include, but... EX120-SAS4