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7. Wiring
7-1. Precautions while wiring
1. Communication terminal
Depending on the communication interfaces that are specified, terminal arrangement differs.
Refer to 4-3 Wiring in instruction manual [general] for terminal numbers.
2. Total length of RS-422A/485 communication cable is less than 1.2 km
Wiring space between each device can be anything but the total cable length distance is less than
1.2km.
(Line converter Last terminal KP)
3. Take action to avoid intermixing of noise.
To avoid effect of noise place the power cable and
other communication cables away from each other
by at least 50 cm or more.
4. Always perform the crimp-style terminal
process.
One of the causes of communication defect is loss
of connection.
Always process the communication cable terminal
using 0 type or Y type crimp style terminal with
insulation sleeve.
(Terminal screw of KP, line converter is M3.5mm.)
5. Apply last terminal resistance.
When using RS-422A/485 communication, apply a resistance of 100Ω to the KP place in the last
terminal. (For details, see clause 7.4)
(General metal coating resistance is okay. It is available with our company and you may order it.)
6. Number of machines of DB connections
For RS-232C :1
For RS-422A/485 : Maximum 31
Total length of cable less than 1.2 km
Line converter
KP
Ｏ type crimp style terminal
3.7 or more
Less than 8
3.7 or more Less than 8
Y type crimp style terminal
Insulating sleeve
Insulating sleeve
（㎜）
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