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3.6 Functional ground
Grounding concept Functional ground is a current path of low impedance between electrical circuits and ground. It is
used, for example, to improve immunity to disturbances and not necessarily as a protective measure. It therefore
serves only to deflect disturbances, not to provide any kind of protection against electric shock.
This device comes equipped with two functional ground connections:
-
Power supply
-
Ground connection
To guarantee safe conductance of electric disturbances, the following points must be observed:
The device must be connected to the central grounding point in the control cabinet using the shortest route possible.
A cable with a minimum cross section of 2.5 mm² per connection should be used.
All data cables connected to the device must be shielded.
For between the line and ground, select a power supply that is low in noise. If there is an excess amount of noise,
connect an insulating transformer.
To increase the noise resistance quality of the power cord, simply twist each power wire before attaching the ring
terminal. To avoid excess noise, make the power cord as short as possible.
This section describes the precautions for grounding the PSR3 unit:
1)
Exclusive grounding (BEST)
2)
Exclusive grounding (OK)
3)
Common grounding (NOT OK)
Important!
The motherboard ground and others devices is connected with PSR3 ground.
