YOKOGAWA VZ20X, User Manual

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4-1
IM 77V01B01-01EN 5th Edition: 2023.03.07-00
4. Wiring
WARNING
・
To prevent electric shock during wiring, make sure that the power supply is turned
OFF.
・
Large pulling force acting on input signal wires wired to the product may damage the
terminals or signal wires of the product. Secure all wiring cables to an installation
panel to prevent pulling force from acting directly on the terminals of the product.
・
If hazardous external voltage (30 VAC or 60 VDC or more) is applied to input
terminals, use twisted wires having an outer diameter of
φ3 mm or less for all
terminals that are wired with twisted wires.
・
If wiring is performed using twisted wires without crimp-on lugs (ferrule terminals),
and hazardous external voltage (30 VAC or 60 VDC or more) is applied to the input
terminals, install the product in a panel or a locked cabinet to prevent the input
terminals from being touched.
・
To prevent fire, use cables having a temperature rating of 80°C or more.
・
The operating environment specified for the product is pollution degree 2. Do not
allow conductive wiring scraps, chips, or the like to enter inside the product. This
causes electric shock, fire, failure, or malfunction. Also, note that wiring scraps and
chips easily enter the product during wiring when the VZ20X is turned face up.
・
Do not apply voltages that exceed the ratings below to the input terminals. Otherwise,
the product may be damaged.
・
Allowable input voltage:
±60 VDC (DC voltage 2 V range or higher and standard signal)
±10 VDC (other than DC voltage 2 V range or higher and standard signal)
・
Voltage between input channels: 300 VAC rms (50 Hz/60 Hz) or 300 VDC
・
Common mode voltage: 300 VAC rms (50/60 Hz) or 300 VDC (under Measurement
Category II conditions)