Mitsubishi MELSEC-A A2USHCPU-S1 User Manual page 140

8. LOADING AND INSTALLATION
(b) Use a power supply which generates minimal noise between wires and between
the programmable controller and ground.
If excessive noise is generated, connect an isolating transformer.
Programmable
controller
Insulation
transformer
(c) When a power supply transformer or isolating transformer is employed to reduce
the voltage from 200VAC to 100VAC, use one with a capacity greater than those
indicated in the following table.
Power Supply
Module
A1S61PN
A1S62PN
(d) Separate the programmable controller's power supply line from the lines for I/O
equipments and power equipments 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 programmable controller, a 10A breaker or an external fuse
are recommended for wiring protection.
Main
power supply
200VAC
Relay
terminal block
On a control panel
Insulation
transformer
Transformer
Capacity
n: Stands for the number of power supply
110VA n
modules.
110VA n
Programmable
Insulation
controller
Transformer
power supply
T1
I/O power supply
Main circuit
power supply
8 - 17
I/O
equipment
Programmable
controller
I/O equipment
Main circuit equipment