YOKOGAWA VZ20X, User Manual

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All Rights Reserved. Copyright © 2021, Yokogawa Electric Corporation GS 77V01B01-01EN 7th Edition 2023.02.13-00

USB
Perform setup by connecting the PLC to the PC by
a USB cable.
Connector type: Type-C
Cable: 3 m or less, USB2.0 or higher
Power can also be supplied to the VZ20X from the
USB port.
When the USB type on the power supply source is
Type-C, Ethernet communication can be used.
When the USB type is other than Type-C, Ethernet
communication can be used by setting. Please
r efer to "■ VZ20X Function List".
■ Other Functions
• Firmware update function: VZ20X firmware can be
updated
Be sure to use the latest firmware.
https://myportal.yokogawa.com/
■ Hardware Specifications

Analog Measurement Input Specifications
• Number of input points: 8
• Input format: Floating unbalanced input, isolation
between input channels, simultaneous sampling
• Input sampling period: 1 msec
• Input type, measurement range and measurement
accuracy: See Table 1
The accuracy is that in the standard operating
conditions: 23±2°C, 55±10% RH, warm-up time of 40
minutes or more
With the filter (Power supply frequency noise removal,
moving average, first-order lag) OFF, the effect of the
measurement environment sometimes causes drift to
increase.
• Measurement current:
Resistance temperature detector. Approx. 0.4 mA
Resistance: Approx. 0.4 mA (200 Ω range), approx.
0.05 mA (2000 Ω range)
• 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)
• Max. voltage between input chanels:
300 VAC rms (50 Hz/60 Hz) or 300 VDC
• Max. common mode voltage:
300 VAC rms (50/60 Hz) or 300 VDC (under
Measurement Category II conditions)
• Input resistance:
Approx. 1 M Ω (DC voltage 2 V range or higher and
standard signal)
10 M Ω or more (other than DC voltage 2 V range or
higher and standard signal)
• Allowable signal source resistance:
2 k Ω or less (DC voltage 2 V range or higher and
standard signal)
250 Ω or less (DC voltage 1 V range or lower and
thermocouple)
• Effect of signal source resistance:
Input burnout detection OFF
5 µV/ 250 Ω or less (thermocouple, DC vo ltage 60
mV range or less)
10 µ V/250 Ω or less (200 mV range)
30 µV /250 Ω or less (1 V range)
0.25%/2k Ω or less (DC voltage 2 V range or higher
and standard signal)
Input burnout detection upscale or downscale
30 µV/25 0 Ω or less (thermocouple)
• Allowable wiring resistance:
Max. 10 Ω per line (thermocouple, resistance
temperature detector)
Conductor resistance between the three lines in a
3-wire connection shall be equal
• Effect of wiring resistance:
Input burnout detection OFF
Measurement accuracy specifications satisfied
within allowable wiring resistance
Input burnout detection UP or DOWN
0.05 °C/10 Ω or les s (resistance temperature
detector)
• Input bias current:
±10 nA or less (input burnout detection OFF)
• Input burnout detection:
UP or DOWN, or OFF selectable
Functions at thermocouple and resistance
temperature detector (RTD), and standard signal.
For standard signal, 0.1 V or less is judged as a
burnout.
• Reference junction compensation error
(thermocouple):

When temperature measurement is 0°C or higher,
when ferrule terminal crimping is used, and when
input terminal temperature is balanced
(The reference junction compensation error range
may be exceeded when single-wire or twisted-wire
connection is used.)
±2 °C (ambient temperature 23±2 °C)
±3 °C (ambient temperature -10 to 55 °C, Type C 0 to
55 °C)
For Type B, reference junction compensation is fixed
to 0°C.
• Noise rejection ratio: 50 Hz/60 Hz±0.1 % rejection
ratio
In case Power supply frequency noise removal filter is
enabled
Normal mode: 40 dB or more
Common mode: 120 dB or more
In case Power supply frequency noise removal filter is
disabled
Common mode: 80 dB or more