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Input Wiring Example A CPU Unit with an AC power supply is shown. CPU Units with DC power sup-
plies don’t have power supply outputs.
Input devices
External power supply output:
300 mA at 24 VDC for CPU Units with 20, 30, 40, or 60 I/O points
(CPU Units with a AC power supply input only.)
WARNING When the 24-VDC output (service power supply to the PC) is overloaded or
short-circuited, the voltage may drop and result in the outputs being turned OFF.
External safety measures must be provided to ensure safety in the system. Not
providing proper safety measures may result in serious accidents.
Wiring and Connections
Section 3-4
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