Mitsubishi FX3U Series

FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
49
4 Specifications, External Dimensions and Terminal Layout (Main Units)
4.1 Generic Specifications
1
Introduction
2
Features and Part Names
3
Product Introduction
4
Specifications
5
Version and Peripheral Devices
6
System Configuration
7
Input/Output Nos., Unit Nos.
8
Installation
9
Preparation and Power Supply Wiring
10
Input Wiring
4.1.1 Dielectric withstand voltage test and insulation resistance test
Perform dielectric withstand voltage test and insulation resistance test at the following voltage between each
terminals and the main unit ground terminal.
Between terminals
Dielectric
strength
Insulation
resistance
Remarks
Terminals of main unit and input/output powered extension unit/block
• Between power supply terminal (AC
power supply) and ground terminal
1.5kV AC
for 1 min
5M Ω or
more on
500V DC
Megger
−
• Between power supply terminal (DC
power supply) and ground terminal
500V AC for
1 min
−
• Between 24V DC service power supply
connected to input terminal (24V DC)
and ground terminal
500V AC for
1 min
−
• Between input terminal (100V AC) and
ground terminal
1.5kV AC
for 1 min
Only input/output powered extension unit/
block
• Between output terminal (relay) and
ground terminal
1.5kV AC
for 1 min
−
• Between output terminal (transistor)
and ground terminal
500V AC for
1 min
−
• Between output terminal (triac) and
ground terminal
1.5kV AC
for 1 min
Only input/output powered extension unit/
block
Terminals of expansion board, special adapter and special function unit/block
• Between terminal of expansion board
(except FX
3U-USB-BD and FX3U-
CNV-BD) and ground terminal
Not allowed Not allowed
Since the communication line and the main
unit CPU are not insulated, it is not allowed to
perform the dielectric withstand voltage test
and insulation resistance test between them.
• Between terminal of expansion board
(FX
3U-USB-BD) and ground terminal
Not allowed Not allowed
Do not perform the dielectric withstand
voltage test and insulation resistance test
between the communication line and the main
unit CPU.
• Between terminal of special adapter
and ground terminal
500V AC for
1 min
5M Ω or
more on
500V DC
Megger
−
• Special function unit/block Each manual
Refer to the manual for each special function
unit/block.