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技术数据SIMATIC S7-400，模拟输入 SM 431，电位隔离 8 模拟输入；分辨率 13 位, U/I/电阻电源电压负载电压 L+● 额定值 (DC)不需要输入电流来自背板总线 DC 5 V，大值350 mA功率损失功率损失，典型值1.8 W模拟输入模拟输入端数量8● 电压/电流测量时8● 测量电阻时4电压输入允许的输入电压（毁坏限制），大值50 V电流输入允许的输入电流（毁坏限制），大值50 mA; 40 mA 持续电流电阻传感器的恒定测量电流，典型值1.67 mA输入范围● 电压是● 电流是● 热电偶否● 电阻温度计否● 电阻是输入范围（额定值），电压● 1 V 至 5 V是— 输入电阻（1 V 至 5 V）200 k?● -1 V 至 +1 V是— 输入电阻（-1 V 至 +1 V）200 k?● -10 V 至 +10 V是— 输入电阻（-10 V 至 +10 V）200 k?输入范围（额定值），电流● -20 mA 至 +20 mA是— 输入电阻（-20 mA 至 +20 mA）80 ?● 4 mA 至 20 mA是— 输入电阻（4 mA 至 20 mA）80 ?输入范围（额定值），电阻● 0 至 600 欧姆是— 输入电阻（0 至 600 欧姆）至 500 欧姆可用导线长度● 屏蔽，大值200 m输入端的模拟值构成集成和转换时间/每通道分辨率● 带有过调制的分辨率（包括符号在内的位数），大值13 bit● 可参数化的集成时间是● 基本转换时间 (ms)23 / 25 ms● 积分时间 (ms)16,7 / 20 ms● 对于干扰频率 f1（单位 Hz）的干扰电压抑制50 / 60 Hz● 组件的基本执行时间（释放所有通道）200 ms; 184/200 ms传感器信号传感器连接● 用于电压测量是; 可能● 对于作为两线制测量变送器时的电流测量是; 附带外部测量变换器供电● 对于作为四线制测量变送器时的电流测量是● 对于利用两线制接口进行的电阻测量是; 电缆电阻被一同测量● 对于利用三线制接口进行的电阻测量是; 电缆电阻被一同测量● 对于利用四线制接口进行的电阻测量是误差/精度温度错误（与输入范围有关），(+/-)0.02 %/K; 电阻测量范围内 ±0.02 %/K；所有其它测量范围内 ±0.007 %整个温度范围内的操作错误限制● 电压，与输入范围有关，(+/-)1 %; ±1 V 时 ±1.0 %；±10 V 时 ±0.6 %；1 至 5 V 时 ±0.7 %● 电流，与输入范围有关，(+/-)1 %; ±20 mA 时，4 至 20 mA● 电阻，与输入范围有关，(+/-)1.25 %; 0 至 500 欧姆（4 导体测量，在 600 欧姆范围内）基本错误限制（25 °C 时的操作错误限制）● 电压，与输入范围有关，(+/-)0.7 %; ±1 V 时 0.7 %；±10 V 时 0.4 %；1 至 5 V 时 0.5 %● 电流，与输入范围有关，(+/-)0.7 %; ±20 mA 时，4 至 20 mA● 电阻，与输入范围有关，(+/-)0.8 %; 0 至 500 欧姆（4 导体测量，在 600 欧姆范围内）报警/诊断/状态信息诊断功能否电位隔离模拟输入电位隔离● 模拟输入电位隔离是; 内部/外部● 在通道之间否● 在通道和背板总线之间是绝缘绝缘测试，使用DC 2120 V 在总线和模拟部件之间；DC 500 V 在总线和位置接地之间；DC 2120 V 在模拟部件和位置接地之间尺寸宽度25 mm高度290 mm深度210 mm重量重量，约500 g
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