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INZ-TN7ZSS-E
- 31 -
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
16. 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).
Fig. 4
-
16
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 (exclud-
ing CO+O
analyzer)” or “3.3 Input/output terminal of control unit (CO+O
analyzer)”. Provide analog out-
put of 4 to 20mA DC, 1 to 5V DC, etc, according to the ordering contents. For connection of the signal cable,
use a shielded wire or an insulated converter (LDC-16H01, manufactured by Fuji Electric Technica Co., Ltd.
or equivalent) to supress the influences by noise.
Analog input is 4 to 20mA DC. Connect the input signal corresponding to the equipment.
Note) When you connect the analog input to the analog output terminal, the printed circuit board may be
damaged. Check the terminal before connecting them.
4.13.3 Connecting contact input/output
Connect the contact input and output properly, referring to
3.2 Input/output terminal of control unit (ex-
analyzer)” or “3.3 Input/output terminal of control unit (CO+O
with the separately submitted approved drawing, connect the contact input/output as shown in the drawing.
For wiring, use shielded wires of which diameters are 1.25 mm or more.
Unassigned terminals may be connected to the internal circuit. Do not use them as repeating terminals.
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