There are two types of I/O communication bus, parallelbus and serial bus. The parallel bus type I/O modules (highprofile I-8K series) are high speed ones used only in thePACs including XPAC, WinPAC, iPAC, ViewPAC, etc. And theserial bus type I/O modules (high profile I-87K series) arelow speed ones used in both PACs including XPAC, WinPAC,iPAC, ViewPAC, etc., and I/O expansion units including RU-87Pn, ET-87Pn, USB-87Pn, etc.
Parallel I/O Modules (I-8KW Series) Includes
Serial I/O modules (I-87KW Series) Includes
With a range of standard communication interfaces and a dualbackplane bus permitting I/O expansion.The dual backplane bus is hybrid in nature providing the facility toconnect either serial or parallel I/O modules.
The parallel bus isused for high speed data transfer.The unit can communicate using serial communications (RS-232, RS-485), Ethernet, or CAN bus. The Ethernet version of theproduct supports an integrated web server permitting Internet andIntranet applications.
With different communication interface, the I/O modules can be classified to high communication speed (Parallel bus) 8K series modules and low communication speed (serial interface) 87K series modules.