PT100 Sensor conditioning modules
PT100MUX8
- Sensor conditioner and multiplexer for 8 RTD sensors Pt100
- 4..20mA process current output (2 wire passive, loop powered)
- 3 wire RTD connection
- Pt100 sensor linearisation (nonlinearity <= 1/40)
- 8 channels (same range and offset)
- 3 optoisolated 24V inputs for channel selection
- Switching speed (full step next channel) <2ms
- Factory calibration for offset and gain at 20°C to 0.1%
- Offset drift < 100ppm
- Gain drift < 150ppm
- Ambient tempoerature -40..85°C
- ESD input protection
- Total error (0..40°C) < 0,3%
This RTD multiplexer is not only to be used with ELZET80 hardware but with PLCs of any make with analog inputs. Applying three 24V signals to Pt100MUX8 engages a binary channel selection to one of the eight inputs. The Pt100's resistance value is translated into a linearised 4..20mA current depending on the input temperature range. 4 standard ranges are available as well as custom devices.
Often, RTD inputs are a tight resource with PLCs, usually there are only one or two if any. If you have 4..20mA current or 0..1/5/10V voltage inputs, then Pt100MUX8 gives you eight Pt100 RTD inputs. If you don't have analog inputs, Pt100FC is another choice. For a voltage input, you need a shunt resistor whose value depends on the input range (see order codes). Power is sourced over the signal cable as shown in the interface connection.
