Mitsubishi Electronics Q25HCPU ユーザーズマニュアル

 

 

 

8 - 5                                                                                                                                                       8 - 5 

MELSEC-Q

 

8   EMC AND LOW VOLTAGE DIRECTIVE 

 

8.1.4 Power supply module 

Always ground the LG and FG terminals after short-circuiting them. 

 

8.1.5 When using QA1S6   B type base unit 

(1)   Cable 

 

(a)   Earthing of shielded cable 

• Earth the shield of the shielded cable as near the unit as possible taking 

care so that the earthed cables are not induced electromagnetically by the 

cable to be earthed. 

• Take appropriate measures so the shield that was partly removed for 

exposure is earthed to the control panel over a large contact surface area. 

A clamp may also be used as shown in the figure below. In this case, 

however, apply a cover to the painted inner wall surface of the control 

panel which comes in contact with the clamp. 

Shield section

 

Screw

Clamp fitting

Shielded cable

Paint mask

 

Note)  The method of earthing by soldering a wire onto the shield section of the 

shielded cable as shown below is not recommended. The high frequency 

impedance will increase and the shield will be ineffective. 

Shielded cable

Wire

Crimp terminal