FOXBORO FCM10EF P0916CD总线通信模块
对于大于满量程的读数，输出将在22 mA（4至20 mA）或1.1 mA（0至1 mA）时饱和。这些模拟输出是隔离的，因为所有输出端子都是浮动的，所以模拟输出与过程输入的连接不会引入接地回路。为了安全起见，系统的一部分应接地，通常在可编程控制器处。对于浮动负载（如仪表），外部接地端子24。这些传感器的输出可从PQM中的任何测量参数中选择。在S2系统设置\模拟输出1-4设定值组中选择输出选项。可用参数列表见第24页第4.3.2节：模拟输出。每个模拟输出可分配两个参数：一个主参数和一个备用参数。在正常操作条件下，主参数将出现在输出端子上。要选择备用参数，必须将其中一个开关输入分配给select ANALOG OUT（选择模拟输出），并且开关输入必须闭合（假设为常闭激活）。通过打开和关闭开关输入，两个模拟输出参数可以在一个输出上复用。这有效地实现了PQM的8个模拟输出。
For readings greater than full scale the output will saturate at 22 mA (4 to 20 mA) or 1.1 mA (0 to 1 mA). These analog outputs are isolated and since all output terminals are floating, the connection of the analog output to a process input will not introduce a ground loop. Part of the system should be grounded for safety, typically at the programmable controller. For floating loads (such as a meter), ground Terminal 24 externally.The outputs for these transducers can be selected from any of the measured parameters in the PQM. The choice of output is selected in the S2 SYSTEM SETUP \ ANALOG OUTPUT 1-4 setpoints group. See Section 4.3.2: Analog Outputs on page –24 for a list of available parameters. Each analog output can be assigned two parameters: a main parameter and an alternate parameter.Under normal operating conditions, the main parameter will appear at the output terminals. To select the alternate parameter, one of the switch inputs must be assigned to SELECT ANALOG OUT and the switch input must be closed (assuming normally closed activation). By opening and closing the switch input, two analog output parameters can be multiplexed on one output. This effectively achieves 8 analog outputs for the PQM.
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