Bosch CL300 - Page 117

SystemModules
FlexibleAutomation
4−65
4.7 Remote Expansion Modules AG/DZ and AG/DU
AG/DZ
AG/DU
Bereit
Ready
I
O
T2,5A
24V
24V
0V
0V
Fig.4−35Remote Expansion Modules AG/DZ and AG/DU
Function Large geographical distances between the installations to be controlled
usually result in extensive wiring. This wiring effort can be reduced with a
distributed architecture of the input/output units, and only a shielded
twisted−pair cable is required.
As to the input/output modules, distributed expansion replaces the
transmission of analog signals by digital transmission to avoid suscepti
bility to interference.