通过内部安装控制继电器，特殊控制开关进行操作就如同电磁阀一样。

Special control switch setup operates like a solenoid valve through internally mounted control relay.

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软件随后使用图形化程序帮助操作者将保险丝和继电器放置到合适位置（保险丝盒或是开关激活模块SAM）。

The software then graphically prompts the operator to place the fuses and relays in their proper positions in the fuse box or switch activation module (SAM).

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本文介绍接近开关传感器与PLC的控制相连接而组成的自动控制系统，它取代操作繁琐的电器继电器控制系统，实现造纸圆筒换卷过程的自动控制。

This paper introduces the autocontrolling system composed with proximity sensor and PLC, this system is instead of relay controlling complicated system to realize cylinder changing automatically.

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