Mitsubishi Q2ACPU User Manual page 310

19. LOADING AND INSTALLATION
(1) Wiring the power supply
(a) When voltage fluctuates outside the specified value range, connect a constant-
voltage transformer.
(b) Use a power supply which generates minimal noise between wires and between
the PLC and ground.
If excessive noise is generated, connect an isolating transformer.
Insulating transformer
(c) When using a power transformer or an isolating transformer to reduce the
voltage from 200VAC to 100VAC, its capacity must be equal to or greater than
the corresponding value shown in the following table.
Power Supply Module
A61P, A61PN
A61PEU
A62P, A62PEU
A65P
A66P
(d) Separate the PLC's power supply line from the lines for I/O devices and power
devices as shown below.
When there is much noise, connect an isolating transformer.
(e) Taking rated current or inrush current into consideration when wiring the power
supply, be sure to connect a breaker or an external fuse that have proper blown
and detection.
When using a single PLC, a 10A breaker or an external fuse are recommended
for wiring protection.
Main
power supply
200VAC
On a control panel
Constant-
voltage
transformer
PLC
Transformer Capacity
160VA n
130VA n
155VA n
110VA n
95VA n
Insulation
PLC
Transformer
power supply
Relay
terminal block
T1
I/O power supply
Main circuit
power supply
19 - 18
PLC
I/O
equipment
Insulating transformer
n: Stands for the number of power supply
modules.
PLC
I/O equipment
Main circuit equipment