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11/18/2007 10:18 AM | |
Posts: 14 Rating:
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Hi Sun, The CPU313C is not capable of directly supporting two wire analog modules. You can use an extra module that converts your 2 wire sensor to a 4 wire signal (safe method) Or you can place the 2 wire sensor in series with the analog input (this will work fine but if you somehow shortcut the sensor wiring the analog input will be damanged by overcurrent). To hook it up you connect the sensor + to the power supply (24VDC) and the sensor - wire to the analog input (for example pin 3 for AI channel 0). Then connect pin 4 to the ground (0 VDC) You cannot use an analog input as digital input. You can findthe CPU manual here -> http://support.automation.siemens.com/WW/view/en/12996906 good luck, Tiesto |
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