Yokogawa IR200 User Manual
Page 20
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IM 11G02M01-01E
IR200 power supply
Varistor or
spark killer
Locate and connect
in close proximity
Noise source
(2) Analog output signal (AO): terminal block 1,
1
to
10
,
15
to
20
.
Output signal:
4 to 20 mA DC or 0 to 1 V DC (selected when ordering)
Non-insulated output
Allowable load: 4 to 20 mA DC, 550
Ω
or less
0 to 1 V DC, 100k
Ω
or more
•
Analog output is provided from each terminal corresponding to the channel displayed in the
measurement screen.
Note) All of analog output signals for the instrument are not isolated. It is recommended to
isolate signals individually to prevent interference from unnecessary signals or to
prevent external interference, especially leading the cable of more than 30 meters to
outdoor.
(3) O
2
sensor input: terminal block 2,
1
–
2
.
Input signal:
External zirconia O
2
analyzer:
Zirconia O
2
sensor signal (ZX8D*C output)
External O
2
analyzer:
0 to 1 V DC (DC input resistor of 1M
Ω
or more)
•
It is used when the external zirconia O
2
analyzer or external O
2
analyzer is specified as order.
•
To connect to the output of the external Zirconia analyzer or external O
2
analyzer prepared
separately.
•
In case of an external O
2
analyzer, input a signal of 0 to 1 V DC with respect to O
2
full scale
of the analyzer.
•
In case of built-in O
2
analyzer, do not use the terminals.
Note) O
2
senser input is not isolated. It is recommended to isolate input signal to prevent
inter ference from unnecessary signals or to prevent external interference.
Zirconia O
2
sensor should be installed at a location that is as close to this instrument
as possible.
When noise source is in the vicinity
Do not install the instrument near an electric device
that generates noise from the power supply (such as
high-frequency furnace and electric welder). If
there is no other choice but to install it near such
devices, provide completely separate power line to
eliminate noise.
In case noise may enter from a relay, solenoid valve,
etc. through power supply, connect a varistor or
spark killer to the noise source as shown below. If
the varistor or spark killer is located away from the
noise source, no effect is obtainable. So, locate near
the noise source.