求翻译：4、单个串口控制器可以独立控制40路继电器(或晶体管)的开启和关闭。通过地址编码，在延时1秒许可的情况下，一个串口最多可以寻址、控制100块串口控制器，构成一个由4000个输出点的大系统。是什么意思？

4, a single serial port controller can be independently controlled 40-channel relay (or transistor) on and off. Through the site, in the case of delay 1 second license, a serial port can be up to 100 blocks of addresses, control serial port controller, constitutes a large output by the 4,000 point system.