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三菱 FX3U 三菱-FX3U-20SSC-H 用戶手冊

所屬類別：三菱 >> FX系列PLC

資料介紹：

INSTALLATION PRECAUTIONS
3) Note that when an error occurs in a relay, triac or transistor output device, the output could be held either on or
off.
For output signals that may lead to serious accidents, external circuits and mechanisms should be designed to
ensure safe machinery operation in such a case.
At Forward/Reverse rotation limits, make sure to wire the contacts with NC, negative-logic. Wiring contacts with NO,
positive-logic may cause serious accidents.
Reference
Make sure to observe the following precautions in order to prevent any damage to the machinery or accidents due
to abnormal data written to the PLC under the influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the main circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take place. As a guideline, lay the control line
at least 100mm (3.94") or more away from the main circuit or high-voltage lines.
2) Ground the shield wire or shield of the shielded cable at one point on the PLC. However, do not ground them at
the same point as the high-voltage lines.
Install module so that excessive force will not be applied to the built-in programming port, input connectors, power
connectors or optical connectors. Failure to do so may result in wire damage/breakage or PLC failure.
22
28
35
42
Reference
Make sure to cut off all phases of the power supply externally before attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
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