Installation
Figure 3-1 Installation diagram
Power budget
CTH200 series PLC has an internal power supply offer 24VDC for itself, the expansion modules
and other device.
It also provide 5VDC logic power supply, which can be used for power supply of any expansion
in the system. Pay close attention to the system configuration to ensure that the CPU can
provide the 5V power for the selected expansion module. If the configuration requires more
power than the CPU provides, some expansion modules must be removed or select CPU that
can provide more power.
CTH200 series CPU also provide 24VDC sensor power supply (except PSC266), which can
provide 24VDC for input, relay coil on expansion module or other power supply. If the required
power exceeds budget, an external 24VDC power supply must be added. For specific CTH200
CPU 24VDC sensor power budget, refer to Chapter 6.3 UDP_PPI Communication
If you need an external 24VDC power supply, make sure that the power supply is not connected
in parallel to the sensor power supply of the CTH200 series CPU. To improve electrical noise
protection, please connect to the common terminal (M) of different power sources.
Warning
An external 24VDC power supply connected in parallel to CTH200DC sensor power
supply can cause a conflict because each power supply seeks to establish its own
potential output. This conflict will shorten the service life of one or two power supplies or
cause an immediate failure, then uncertain operation of the PLC system. The
unpredictable operation may cause personal injury and equipment damage.
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