Answer / mugil

Assuming 24 vdc I/O cards.

On a transistor output card Sourceing is PNP or Active High. This means that you connect the output to the + side of the load device and connect the other side to 0vdc. If the output Card is Sinking it is NPN or active low meaning that you would tie the + side of the device to 24vdc and the common would connect to the output card.

On input cards if the input card is a sourceing card you would use NPN sensors. The cards common connection would be to a +24vdc source and the device (sensor) would give a path to 0vdc. If the input card was sinking you would use PNP sensors. The sensor would be connected to the + 24vdc source and the output from the device would connect to the PLC input card which would have a common connection to 0vdc.

Please any one can explain how to calibrate transmitter (smart) online with out remove from the container suppose it is interface level or static pressure level measurement we dont want to remove transmitter from the container mean it is running plant please give me detail. thankx brothers

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