Precautions for Safe Use
16
CJ-series EtherCAT Slave Units Operation Manual (W541)
• Do not exceed the rated supply capacity of the Power Supply Units in the CJ-series PLC. The rated
supply capacities are given in the operation manual of the CPU Units.
If the capacity is exceeded, operation may stop, malfunctions may occur, or data may not be backed
up normally for power interruptions.
Use CJ-series Power Supply Units for both the CJ-series CPU Rack and Expansion Racks.
Operation is not possible if an NJ/NX-series Power Supply Unit is used with a CJ-series CPU Unit.
• Surge current occurs when the power supply is turned ON. When selecting fuses or breakers for
external circuits, consider the above precaution and allow sufficient margin in shut-off performance.
Refer to the relevant manuals for surge current specifications. Refer to the operation manual of the
CPU Units for surge current specifications.
• If the full dielectric strength voltage is applied or turned OFF using the switch on the tester, the gener-
ated impulse voltage may damage the Power Supply Unit. Use the adjustment on the tester to grad-
ually increase and decrease the voltage.
• Apply the voltage between the Power Supply Unit's L1 or L2 terminal and the GR terminal when test-
ing insulation and dielectric strength.
• Do not supply AC power from an inverter or other device with a square-wave output. Internal temper-
ature rise may result in smoking or burning. Always input a sinusoidal wave with the frequency that is
given in the operation manual of the CPU Units.
• Install external breakers and take other safety measures against short-circuiting in external wiring.
• Always turn ON power to the PLC before turning ON power to the control system. If the PLC power
supply is turned ON after the control power supply, temporary errors may result in control system sig-
nals because the output terminals on DC Output Units and other Units may momentarily turn ON
when power is turned ON to the PLC.
• Double-check all wiring and switch settings before turning ON the power supply. Incorrect wiring may
result in burning.
• Check the user program, data, and parameter settings for proper execution before you use them for
actual operation.
• Confirm that the I/O Communication Area Setting Table and I/O Reference Area Setting Table set-
tings are correct. Incorrect system settings can cause unexpected behavior.
• Do not disconnect the cable or turn OFF the power supply to the PLC when downloading data or the
user program from Support Software.
• Always turn OFF the power supply to the PLC before attempting any of the following.
a) Mounting or removing I/O Units or the CPU Unit
b) Assembling the Units
c) Setting DIP switches or rotary switches
d) Connecting cables or wiring the system
e) Connecting or disconnecting the connectors
• Do not touch the terminals on the Power Supply Unit immediately after turning OFF the power supply.
Residual voltage may cause electrical shock.
Power Supply Design
Turning ON the Power Supply
Actual Operation
Turning OFF the Power Supply
Summary of Contents for CJ1W- ECT21
Page 1: ...Cat No W541 E1 02 OPERATION MANUAL SYSMAC CJ Series CJ1W ECT21 EtherCAT Slave Unit ...
Page 8: ...CONTENTS 6 CJ series EtherCAT Slave Units Operation Manual W541 ...
Page 30: ...Revision History 28 CJ series EtherCAT Slave Units Operation Manual W541 ...
Page 32: ...Sections in this Manual 30 CJ series EtherCAT Slave Units Operation Manual W541 ...
Page 148: ...Appendices A 34 CJ series EtherCAT Slave Units Operation Manual W541 ...
Page 149: ...I 1 I CJ series EtherCAT Slave Units Operation Manual W541 Index ...
Page 152: ...I 4 CJ series EtherCAT Slave Units Operation Manual W541 Index ...
Page 153: ......