User-oriented connection technique

The “internals” of the I/O system are also user friendly down to the

last detail: the I/O compound module, consisting of terminal block

with backplane bus connection and electronics protected against

polarity reversal, has a modular structure. This allows a defective

electronic module to changed when maintenance work needs to be

performed without the wiring from the base module having to be

disconnected.Serviceengineersknowthatthiseliminatesacommon

sourceoferrors–incorrectwiring.Thesteppeddesignoftheconnec

tionlevelalsooffersadvantages,includingtensionspringconnection

technology and permanent wiring, which has proven itself on

standardterminalsforyears.Forthewiringitself,asimplescrewdriver

is sufficient. The simple and clear system of labelling and wiring for

thenewsystemalsomakesitabreezetocombinemodulestocreate

complete stations. The integrated backplane bus allows up to

64 modulestobeconnectedinanydesired sequence bysimply

plugging them in without the need for any wiring.