The Omron CS1 systems can operate on 24 VDC power supply or on a 100 -240 VAC mains. For small scale systems with mainly digital I/O a low cost capacity power supply can be used. For systems with many more analogue I/O and communication units, a larger power supply unit maybe required.
Omron PLC racks are available in several sizes, from 2 to 10 slots wide. Special backplanes are required for duplex systems. Depending on the CPU type, up to 7 expansions can be installed to the CPU rack, providing a total capacity of 80 I/O units.
The total length of the expansion cables of any one system maybe up to 12m.