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Hello, we want to monitor (and later control) some 16 temperatures currently connected to independent single loop controllers. We'll be using PLC Direct 8 input thermocouple modules (for the DL405 series) for the
temperature monitoring. My question is, can we connect a thermocouple to both a single loop controllers and the PLC module? Is there a possibility of inaccuracies with this scheme, due to the low signal levels?
I know we have to be careful about not exceeding common mode voltage limits for the PLC modules, and of course we'll be using proper t/c extension cables,
etc., but our concern right now is only about possible drifts and inaccuracies. Thanks in advance for any comment.
Bob
temperature monitoring. My question is, can we connect a thermocouple to both a single loop controllers and the PLC module? Is there a possibility of inaccuracies with this scheme, due to the low signal levels?
I know we have to be careful about not exceeding common mode voltage limits for the PLC modules, and of course we'll be using proper t/c extension cables,
etc., but our concern right now is only about possible drifts and inaccuracies. Thanks in advance for any comment.
Bob