Chapter 3 - Plan and Install MLPLC
ATTENTION
l If bases are installed without adequate spacing, the air temperature (Tb + Tr) may rise up to
15°C for the fiber optic module and the module installed right above the power module.
l Ensure that air temperature around the module does not exceed 55°C.
3.1.3 Grounding requirements
Grounding for cabinet mounting
1. Take sufficient measures against noise in PLC, making it possible to be used without
grounding.
2. Use dedicated grounding for the wires as far as possible.
3. If the grounding is functional, use class 3 grounding, (grounding resistance must be 100Ω or
less).
4. If it is not possible to use dedicated grounding, use common grounding, as depicted in the
following figure.
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