Can a thermal resistor be connected to two digital displays for simultaneous display?

It seems someone asked about this just a few days ago; adding a one-in-two-out signal processing module will do

Of course, it’s possible; when ordering a thermoresistor, you can also choose to have two detection points

The same thermistor cannot be connected to two meters at the same time. But platinum resistors can be used in pairs. It’s possible to connect to the display tables separately.

The thermoresistor of WZP2_230 will suffice; the number 2 indicates two units

In the owner’s case, there should be only one unit. Anyway, since you want to check whether the thermistor or the PLC conversion is working correctly, first connect it to the PLC to view the data, then disconnect it and connect it to the digital display to check the readings; this way, you should be able to determine whether everything is in order.

The same thermistor cannot be connected to two meters at the same time. But platinum resistors can be used in pairs. It’s possible to connect to the display tables separately.

The same thermistor cannot be connected to two meters at the same time

A two-core platinum resistor will do, I’ve encountered that before

A two-wire resistor can be used, or a digital meter with an output function can be employed to convert the resistance value into a 4-20 MA signal for transmission to the PLC

A type with temperature sensitivity can be used, and an distributor can be added to provide two outputs; it’s inexpensive. It’s the simplest solution. Alternatively, two thermal resistors can also be used.

Thermistor sensors have relatively high measurement accuracy; if display on-site is desired, a digital display instrument with a 4-20mA output can be chosen； The signal from the thermal resistor can be connected to a digital display, while the MA output signal can be connected to the PLC, thereby enabling display at two locations.

It’s very simple: just add a temperature transmitter and a distributor that outputs 4-20mA, then connect the display gauge to the PLC in series – this way, there will be displays on both sides. There’s no need for two

I don’t see the purpose of using two; however, a thermistor can be connected to two displays, and a one-input two-output safety barrier will suffice. The PLC itself receives 4–20mA signals; this indicates that the thermal resistor is an integrated temperature transmitter. You can measure the current in the circuit to calculate the temperature, or measure the resistance value on-site and use a table to determine the temperature. I’m sure your supervisor will believe you

Dual-core platinum resistors work perfectly; many units in our organization use them this way!

It’s easy to determine that a thermal resistor is inaccurate; here are 3 suggestions for the original poster: 1. A resistance box or a standard signal source can be used to send signals to the PLC’s input module, to check whether the PLC displays the correct values； 2. A multimeter or a standard signal source can be used to measure the resistance of the thermal resistor in use, and this value can be compared with the standard values to determine whether it is accurate. If it is a thermal resistor equipped with an on-site transmitter, the current can be measured; the converted signal can then be transformed into a resistance signal, which can be compared with the standard values. This approach allows one to determine whether there is a problem with the converter. 3. You can replace it with a spare thermistor and see. There’s no need to use a digital display anymore. By following the suggestions I gave you and eliminating possibilities step by step, you should be able to solve the problem.

Just add a transmitter, or use a two-wire thermal resistor

Single temperature transmitter, 4–20mA output.

Just add a signal isolator with one input and two outputs~