YOKOGAWA IR800G, User Manual

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IM 11G06A01-02EN
3-7
3. INSTALLATION
1st Edition : Oct. 27, 2023-00
How to wire
Signal and power lines should be installed under the following conditions.
(1) Wiring should be equivalent to JIS D (Class 3) grounding (grounding resistance 100 ohms
or less).
(2) The shield must be connected to the FG terminal of the converter. (The object is the RS-485
cable.)
WARNING
• Use protective grounding cables with a cross-sectional area of 0.75 to 2.1 mm
2
.
• Use cables with a heat resistance of 80°C or higher for wiring.
NOTE
Grounding of Shielded Cable
Shielded cables are very effective for noise rejection. The method of grounding the shield
depends on the usage conditions.
Single-ended grounding, in which the shield is connected only to the ground of the product,
is effective for noise rejection when the cable length is long and there is a potential difference
between the ground of the connection partner and the ground of the product.
If there is no electric potential difference between the ground of the connection partner and the
ground of this device, double-ended grounding may be effective by connecting to the ground
of the connection partner as well. (It may also be effective to ground both ends and connect a
capacitor in series to one side of the ground.