Earthing / Grounding - Mitsubishi Electric MELSEC FX2NC-16MT-D/UL Hardware Manual

FX2NC Series Programmable Controllers
If the power has to be supplied from two power sources due to low capacity of the DC power
supply unit, etc., be sure to connect the minus lines of the two power supply units.
Figure 4.4: Connection of minus lines
M ain U nit
24V D C +20%
-15%
4.2

Earthing / Grounding

Use a cable at least 0.2mm
less than 100Ω (class D). Note that the ground cable must not be connected to the same
ground as the power circuits. Grounding is recommended but if a proper ground cannot be
provided the PC will still operate correctly without being grounded.
C om m unication cable
E xtension
blocks
F X -C N V -IF
2N C
5% ripple (p-p) or less
2
(AWG24) to ground equipment. Ground resistance must be
D ata access
unit
Power supply 4.
4-6