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callelundin

why dont my analog input works?

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Hey all! Im in a bit of a confusing problem. I have an 315F- 2 PN/DP cpu with a AI8x14bits input card on (331-7hf01-0ab0). To this i whant to connect a peppler fuchs kfd2-crg2-ex1d signaltransmitter, http://www.pepperl-fuchs.us/usa/en/classid_13.htm?view=productdetails&prodid=32675 And to the transmitter i have connected a 2 wire pressureinstrument. Now the pressure instrument is working fine, sending its signal to the peppler fuschs transmitter. The transmitter needs to be connected to the AI on the PLC. If i messure between point 7 and 8 on the transmitter i have 18VDC and 6.5mA right now. But i cant get it connected to the plc... nothing happens?! I have downloaded everything with the HWconfig and enabel channals to 4DMU.. ( the transmitter have its own power supply at point 23 and 24 ) Then i starts the VAT but nothing changes. And all the LED are black. What am i doing wrong here?? i have 24VDC on 1 and 20 on the AI.

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Hi, if the transmitter has it's own power supply it must be connected as 4 wire instrument else it won't work at all, and you have to check how the inputs on the module should be connected. Good luck, Best Regards, Greg.

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Hi! Did you set in HW config that analogue inputs are 4-20mA type?

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Is this card the type with a mechanical keying on the side where you select the input type?

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