I/O BUS EXPANSION
Lower cost and greater flexibility
 | I/O Bus modules are smart expander modules that communicate via serial communication. The signal technology is a two wire "short to talk" mechanism that is very robust. The "master" controller (usually a SAC) supplies a current transmitter source that attempts to drive 200ma through the signal loop. Because of the power available on I/O Bus, expander boards can also draw their power from the BUS and can be at distances of up to 1000 ft from the hosting panel subject to wire size. The low impedance of this communication technology makes it very noise immune. |
Key features of I/O Bus include:
| Increases the power and point capacity of all SACS | |
| Seamless information transfer between I/O Bus expansion modules and all network SACs | |
| Both power and communications supplied over single shielded twisted pair cable | |
| Devices can be daisy-chained or T-tapped from the I/O Bus line, rather than using a homerun from the device to the controlling SAC | |
| Physical location can be up to 1000 feet from controlling SAC | |
| Unitary control applications possible because of onboard signal processing | |
| Modules are addressable and configure automatically (Plug and Play) | |
| I/O Bus lends itself to rapid development of custom applications modules |