Omron C200HE-CPU42-E Instruction Manual page 85

Wiring
DC Power Supplies
DC Power Source
68
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External Display Device Connection Example
The alarm output (replacement notification output) is an NC contact. Therefore,
wire the alarm output using an NC contact or other means to turn ON an error
indicator or LED display as shown in the following diagram.
Connect the positive terminals of the 24-VDC power supply to the Input Unit
common (COM) terminals.
Note The OL display will also light if the PC's power supply fails.
• Separate the alarm output cables from power lines and high-voltage lines.
• Do not apply a voltage or connect a load to the alarm output that exceeds the
rated voltage or load.
Note 1. Do not remove the protective label from the top of the Unit before wiring. This
label is to prevent wiring clippings and other foreign matter from entering the
Unit during wiring procedures.
2. After completing the wiring, remove the protective label from the top of the
Unit before starting operation. The Unit will overheat if operated with this
label in place.
C200HW-PD024/C200HW-PD025
Power Supply Unit
Supply 24 VDC. Keep voltage fluctuations within the specified range (19.2 to
28.8 V).
Relay
(NC contact)
24 VDC
power supply
Screw (3.5 mm head with
self-raising pressure plate)
Note To satisfy the EC Directives (Low-voltage
Directives), provide reinforced insulation or
double insulation for the 24-VDC power source
connected to the Power Supply Unit.
Section 3-2
Power
supply
DC power
source