1 Introduction and Precautions
1.2.4 Wiring Precautions
1-8
• If connecting an inductive load in parallel with DC Input Module, connect the fly-
wheel diode in parallel with the inductive load to prevent surge voltage.
Failure to connect a flywheel diode may result in damage to the DC Input Mod-
ule.
• If connecting an inductive load to the DC Output Module, connect the flywheel
diode in parallel with the inductive load to prevent surge voltage.
Failure to connect a flywheel diode may result in damage to the DC Output
Module.
• If connecting a contact to an inductive load of the DC Output Module, connect the
flywheel diode in parallel with the inductive load to prevent surge voltage.
Failure to connect a flywheel diode may result in damage to the DC Output
Module.
• Insulation is not provided between the channels of the Analog Input Module.
To insulate all the analog signals connected to the Analog Input Module, use a com-
mercial isolation amplifier for each channel.
Incorrect connections may cause damages and malfunctions of the Analog
Input Modules.
• The maximum allowable load current for Analog Output Modules (
±
10V, 2
chan-
nels) is
±
5 mA (2 k
Ω
). The load resistance must be 2 k
Ω
or more.
Incorrect connection may cause the output signal to be overloaded, and result in
damages or malfunction of the Analog Output Module.
• The maximum allowable load current for Analog Output Modules (0 to10V, 2 chan-
nels) is 5 mA (2 k
Ω
). The load resistance must be 2 k
Ω
or more.
Incorrect connection may cause the output signal to be overloaded, and result in
damages or malfunction of the Analog Output Module.
• The maximum allowable load current for Analog Output Modules (0 to 5V, 2 chan-
nels) is 2.5 mA (2 k
Ω
). The load resistance must be 2 k
Ω
or more.
Incorrect connection may cause the output signal to be overloaded, and result in
damages or malfunction of the Analog Output Module.
• The maximum allowable load resistance for Analog Output Modules (4 mA to 20
mA, 2 channels) is 550 k
Ω
). The load resistance must be 550 k
Ω
or more.
Incorrect connection may cause the output signal to be overloaded, and result in
damages or malfunction of the Analog Output Module.
• If using Low Voltage Directive compliant products, always use round crimp termi-
nals for M3 screws and mount insulation cover at each crimp when connecting
wires to wiring terminals.
If bare wires are used, an electric shock or a short-circuit may result if the wires
become loose.
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