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When noise source is in the vicinity
Avoid installing this analyzer near an electrical ap-
paratus which produces power source noise. (Such
as high frequency furnace, electric welder, etc.) If
the analyzer must be used near such equipment, a
separate power line should be used for avoiding
noise.
In case noise may enter from a relay, solenoid
valve, etc. through power supply, connect a varistor
(e.g. ENA211 OKAYA) to the noise source as
shown in Fig. 4 － 5. If the varistor is located away
from the noise source, no effect is obtainable. So,
locate near the noise source. Also, it is more effec-
tive to attach the ferrite core to the power cable near
the inlet of the control unit (outside the box).
CAUTION
• Wire the outlet for connecting power supply with the wire diameter of 1.25mm or more.
• Connect to the outlet with grounding line (class D grounding). For connection of ground line, use the
ground line with the wire diameter of 2mm or more.
• For connection of the signal connecting cable, use a shielded wire in order to suppress the influences
by noise.
• Wire the output contact and the contact input connecting cable with the wire diameter of 1.25mm.
• After the AC power cable is connected, put a power terminal cover on.
• Do not install the instrument near objects which considerably disturb power waveforms. Do not share
their power supplies either. Otherwise, it may cause a display error.
• Power supply and output signal lines should be separated from each other.
• As the wire is connected to each terminal, use a solderless terminal (for M4).
• As the solderless terminal is used for AC power cable and ground line, chose a type of solderless ter-
minal that caulks cores and coverings separately.
4.13.2 Connecting analog input/output
Connect the analog input and output properly, referring to "3.2 Input/output terminal of control unit". Pro-
vide analog output of 4 to 20mA DC, 1 to 5V DC, etc, according to the ordering contents.
Analog input is 4 to 20mA DC. Connect the input signal corresponding to the equipment.
4.13.3 Connecting contact input/output
Connect the contact input and output properly, referring to "3.2 Input/output terminal of control unit". If it is
provided with the separately submitted approved drawing, connect the contact input/output as shown in the
drawing.
INZ-TN1ZSS-E
To power supply
Ferrite core
- 23 -
ount the varistor
near the noise source
Varistor
Noise source
Fig. 4－16
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