Mitsubishi Electric Q26UD(E)HCPU User Manual page 108

(b) Redundant power supply system
• Q64RPN
System A System B
*1 The operation of the ERR terminal is as follows:
<When the redundant power supply module is mounted on the redundant power main base unit>
The terminal turns off (opens) when the AC power is not input, a CPU module stop error (including a reset) occurs, the
redundant power supply module fails, or the fuse of the redundant power supply module is blown.
<When the redundant power supply module is mounted on the redundant power extension base unit>
The terminal turns off (opens) when the AC power is not input, the redundant power supply module fails, or the fuse of
the redundant power supply module is blown.
*2 When input power is supplied to the redundant power supply module mounted on the redundant power main base unit
and the redundant power supply module mounted on the redundant power extension base unit simultaneously, the ON
(short) timing of the ERR terminal on the redundant power main base unit is later than that of the ERR terminal on the
redundant power extension base unit by the initial processing time of the CPU module.
*3 Ground the LG and FG terminals by using a ground wire as thick and short as possible (2mm in diameter).
106
100V/200VAC
AC
100V/200VAC
AC
Extension cable
Ground wire
Grounding
100V/200VAC
AC
100V/200VAC
AC
Redundant power main base unit
(Q38RB)
Q64RPN Q64RPN
*1, *2
ERR
*3
FG
*3
LG
INPUT
100-240VAC
Redundant power extension
base unit (Q68RB)
Q64RPN Q64RPN
*1, *2
ERR
*3
FG
*3
LG
INPUT
100-240VAC
Ground wire
Grounding
CPU module
*1, *2
ERR
*3
FG
*3
LG
INPUT
100-240VAC
I/O module
*1, *2
ERR
*3
FG
*3
LG
INPUT
100-240VAC