从电源盒引出的直流电源线及连机线，应尽可能布暗线，明线须用卡固定；
The DC power supply wire and connector wire drawn from power supply box should wiring buried wire as possible, exposed wire must be fixed by holding latch ;
通讯采用直流电源载波方法，信号线与电源线公用，不仅降低了布线成本，而且提高了系统可靠性。
Using the DC power carrier technology, the signal was modulated into the power wire, which can not only reduce the wiring cost, but also improve the system reliability.
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