How must be done the connection between the RTDs and BM-HMI ports, for each combination?

Modified on Mon, 15 Aug, 2022 at 3:39 PM

If the two inputs designed for RTDs are working (A and B), RTD A is connected to the BM-HMI 26, 27, and 28 ports, and RTD B is connected to 26, 29, and 30 terminals.

When only the RTD B is working, it must be connected to the 26, 29, and 30 terminals, and a jumper needs to be installed between ports 26 and 27, in this way, in this configuration the 26, 27, 29, and 30 terminals are used. See the following image:

RTD Inputs:

RTD A

Allow up to two RTD (Pt100) sensors for free deployment to be connected, for example, for measuring ambient temperature, oil temperature, or others. Using these inputs is optional. When only RTD B is used, an external jumper must be placed between terminals 26 and 27 of BM-HMI, as shown in the wiring diagram.

26, 27 and 28

RTD B

26, 27, 29 and 30

(see wiring diagram)

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