YOKOGAWA IR800G, User Manual

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IM 11G06A01-02EN
3-11
3. INSTALLATION
1st Edition : Oct. 27, 2023-00
l
When noise source is in the vicinity
• Do not install this instrument near electrical equipment that generates power supply noise.
(high-frequency furnaces, electric welding machines, etc.) Keep the power lines completely
separate to avoid noise when using the instrument near such devices.
• If noise is present in a relay, solenoid valve, etc. from the power supply, attach a varistor
or spark killer to the noise source as shown in Figure 3.7. Note that placing the varistor or
spark killer apart from the noise source will have no effect.
Noise Sources
proximate arrangement
connection
Varistor or
Spark killer
Main unit
power supply
Figure 3.7
n
I/O terminals
NOTE
• Analog outputs are mutually non-isolated. We recommend that signals be isolated
individually to eliminate unwanted signal wraparound and disturbance effects when drawing
wiring outdoors, wiring longer than 30 m, or connecting multiple outputs to the outside.
• Isolated output (isolated between each DO and from the ground)
To eliminate external influences on signals, separate the wiring to the power supply and
contact output from the wiring to analog signals, O
2
detector input, and contact input.
• Be sure to earth ground the IR800G/IR810G to prevent malfunctions due to external noise, etc.
l Terminal block 1
● Contact input
Terminal block 1
contact input
CH1
1
DI1
2
DI7
contact input
CH7
3 4
contact input
CH2
5
DI2
6
DI8
contact input
CH8
7 8
contact input
CH3
9
DI3
10 N.C.
unused pin
(No connection)
11 12 N.C.
contact input
CH4
13
DI4
14 N.C.
15 16 N.C.
contact input
CH5
17
DI5
18 N.C.
19 20 N.C.
contact input
CH6
21
DI6
22 N.C.
23
M3 screw
terminal
Figure 3.8 Terminal block 1: Contact input terminal