2.1 I/O 模块描述................................................................................................................7 2.2 I/O 模块规格................................................................................................................10 数字输入模块................................................................................................................10 数字输出模块................................................................................................................20 模拟输入模块......................................................................................................................30 模拟输出模块......................................................................................................................37 热电偶输入模块....................................................................................................................42 RTD 输入模块......................................................................................................................44 高速计数器模块....................................................................................................................46