All Rights Reserved Copyright © 2021, Yokogawa Electric Corporation
5th Edition: 2023.03.07-00
• If hazardous external voltage (30 VAC or 60 VDC or more) is applied to input
terminals, provide adequate protection to prevent users or service engineers
from inadvertently touching the terminals or tools or the like from coming in
contact with the terminals.
• 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.
• Make sure to use appropriate wires and crimp-on lugs (ferrule terminals). To
prevent electric shock due to damage, prevent strong tension from being applied
to the cords.
• To prevent fire, use signal wires having a temperature rating of 80°C or higher.
• 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.
• When the product is used in China, if hazardous external voltage (30 VAC or 60
VDC or more) is applied to the input terminals from an external source, install
the product in a panel or a locked cabinet to prevent the input terminals from
being touched.
• Before installation and wiring, be sure to check the Model VZ20X Analog
Sensing Unit User’s Manual.
(URL: https://www.yokogawa.com/ns/vz/)
・This instrument is an EMC class A product. In a domestic environment this product
may cause radio interference in which case the user needs to take adequate
measures.
・Limit the length of USB (Type-C) cables to three meters.
・Ensure that static electricity is not applied to the terminals. When attaching and
removing wiring, first discharge static electricity to ensure that static electricity is not
applied to the wiring.
・Damage to the Protection
Operation of the product in a manner not specified in the user’s manual may
damage its protective construction.
・Do Not Use in a Corrosive Gas
Use of the product in environments with high concentrations of corrosive gas (H2S,
SOx, etc.) may cause a failure.
