Preparation For Test Operation; Preliminary Inspection [Power Off]; Connection To Peripheral Device Connecting Connector (Rs-422) - Mitsubishi Electric MELSEQ FX3S Series User Manual

FX Series Programmable Controllers
3S
User's Manual - Hardware Edition
14.1

Preparation for Test Operation

14.1.1 Preliminary inspection [power OFF]

Incorrect connection of the power supply terminal, contact of the DC input wire and power supply wire, or
short-circuiting of output wires may result in serious damage.
Before applying power, check that the power supply and ground terminals are connected correctly and input/
output devices are wired properly.
The dielectric withstand voltage and insulation resistance test of the PLC should be measured in accordance with the following
procedures.
1) Remove all input/output wires and power supply wires from the PLC.
2) Connect a crossing wire to each of the PLC terminals (power supply terminal, input terminals and output terminals) except the
ground terminal. For the dielectric withstand voltage test of each terminal, refer to the generic specifications for the product. (refer to
Section 4.1)
3) Measure the dielectric withstand voltage and insulation resistance between each terminal and the ground terminal.
Dielectric withstand voltage: 1.5 kV AC or 500 V for 1min (The terminals vary in dielectric withstand voltage.)
Insulation resistance: 5 MΩ or higher by 500 V DC insulation resistance tester

14.1.2 Connection to peripheral device connecting connector (RS-422)

1. When connecting a peripheral device
Connect and disconnect the communication cable for the peripheral device.
2. For continuous use of a peripheral device (such as GOT)
Cut off the area shown in the left figure below of the peripheral device connector cover (main unit) using a
nipper, etc., and connect the peripheral device as shown in the right figure below.
Peripheral device
connecting connector
cover
Cut off the dotted
line area
126
Programming
connector
(RS-422)
Communication
Positioning mark
cable
Connection example
14 Test Operation, Adjustment, Maintenance and Troubleshooting
Notes
Communication
cable
14.1 Preparation for Test Operation