Mitsubishi Electric MELSEC iQ-R Series Configuration Manual page 125

The following figure shows a wiring example of a redundant power supply system.
Use a power supply in a different system for each redundant power supply module (A or B, as shown below) so that the
redundant power supply modules are powered on or off individually at replacement.
• AC power supply
A B
100/200VAC
AC
100/200VAC
AC
100/200VAC
AC
100/200VAC
AC
• 100VAC, 200VAC and 24VDC wires must be twisted starting from the terminal connected, and connect
modules at the shortest distance. Also, use the thickest wire (maximum 2) to reduce the voltage drop.
• For the wiring to a terminal block, use a solderless terminal.
• To prevent the short-circuit because of loosening screws, use the solderless terminal with an insulation
sleeve of 0.8 mm or less. Note that up to two solderless terminals can be connected per terminal block.
Solderless terminal
with an insulation
sleeve
• Ground the LG and FG terminals after short-circuiting them. Failure to do so may be susceptible to the
noise. The LG terminal has a half potential of the input voltage.
• When two redundant power supply modules operate in parallel as a redundant power supply system, it is
recommended to connect the one redundant power supply module to an uninterruptible power supply
(UPS).
R310RB
R64RP R64RP
R610RB R64RP R64RP
Terminal block
R04CPU
ERR
FG
LG
INPUT
100-240VAC
ERR
FG
LG
INPUT
100-240VAC
5 INSTALLATION AND WIRING
5
123
5.7 Wiring