可直接驱动控制继电器。
In the control system, operating through the PLC issued a directive, the drive time relay.
在该控制系统中，操作人员通过PLC发出指令，驱动时间继电器。
The basic program is that in the wiper circuit the power transistor and relay are connected in series to perform drive control.
主要方案是，在刮水装置回路中串接功率三极管或继电器实行驱动控制。
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