MU-419
The MU-419 module offers four analogue input channels configurable for voltage measurement (S.E. with "V ranges") or resistance measurement in two-wire topology.
For direct measurement with different temperature sensors, the firmware implements algorithms for linearization of most of the resistive thermometers (RTDīs). Additionally, MU-419 allows ratiometric measurement with potentiometers.
The module is based on 16-bit A/D converter with system autocalibration running continuously on the background of cyclic measurements. The time needed to measure all channels, including autocalibration and open senzor detection, takes less than 2.5 seconds. Alternatively, floating filters averaging the results of the ten most recent measured values can be activated.
The whole analogue input group is isolated from other circuits of module (power supply and RS-485 interface), but inputs are not isolated from each other.
Note: The MU-419 module is designed for basic accuracy measurements. For applications with higher requirements MU-415, MU-615 or MU-815 can be recommended.
Specifications
| Type | MU-419 |
|---|---|
| Analog inputs | 4x U/RTD/POT |
| Analog input topology (voltage ranges) |
S.E. |
| Analog input topology (resistance ranges) |
two-wires (software compensation of wire resistance) |
| Analog input topology (potentiometers) |
three-wires (internal excitation voltage) |
| Voltage ranges | ±3.2V ±1.6V ±0.8V ±0.4V ±0.2V |
| Resistance ranges | 3.2kΩ 1.6kΩ 800Ω 400Ω 200Ω |
| Excitation current (resistance ranges) |
1.0mA approx. |
| Excitation voltage (potentiometer mode) |
2.5V approx. (11mA max.) |
| Internal temperature sensor |
-40÷70°C |
| ADC resolution | 16-bit (continuous offset and range autocalibration) |
| Basic accuracy | better than 0.15% of FSR (U/R ranges) better than 1°C of FSR (temperature sensor) |
| RTD linearization | Pt100/3850 (-200÷850°C) Pt100/3911 (-200÷850°C) Pt500/3850 (-200÷850°C) Pt500/3911 (-200÷850°C) Pt1000/3850 (-200÷850°C) Pt1000/3911 (-200÷850°C) Ni100/5000 (-60÷250°C) Ni100/6180 (-60÷250°C) Ni1000/5000 (-60÷250°C) Ni1000/6180 (-60÷250°C) KTY10-5 (-50÷90°C) KTY10-6 (-50÷90°C) KTY10-62 (-50÷90°C) KTY10-7 (-50÷90°C) KTY84/130 (-40÷300°C) |
| Measurement period | less than 2.5s (the time needed to measure all channels) |
| Overvoltage protection | ±15V continuously (±20V max. 1s) |
| Analog input isolation | 1kVDC (AIN block against other circuits) |
| Supply voltage | 10÷30VDC |
| Power consumption | 1.9W max. |
| Housing & Dimensions | Modulbox 3M |
| Signal terminals | screw terminals, wire 2.5mm2 max. |
