Transmitter LKM224
The LKM224 is an analog measuring transducer for mounting on the standard rail and can be designed for the Pt100 or Pt1000 measuring resistor according to DIN EN 60751. It converts the temperature-dependent resistance value of the sensor into a standard signal of 0...10V. Lead resistances are largely compensated by means of a three-wire circuit. A two-wire circuit can also be implemented.
The transmitter is supplied calibrated to customer specifications. By means of span and zero controllers, a subsequent fine adjustment can be carried out on site.
| Resistance sensor | Measurement range in °C |
|---|---|
| Pt100 | -200 – 850 |
| Pt1000 | -200 – 450 |
| Feature | Value | Remark |
|---|---|---|
| Input | Pt100 / Pt1000 | 2-/3-wire connection |
| Measuring current | approx. 0.8 mA | depends on sensor resistance |
| Zero | -200 – 600 °C | value for 0 V |
| Span | > 20 K | Zero + span = value for 10 V |
| Linearity error | < 0.1 % FS | |
| Supply voltage | 15 – 35 VDC, 15 – 26 VAC | reverse-polarity protected |
| Max. current consumption | 40 mA | |
| Output | 0 – 10 V | other voltages possible |
| Sensor break | > 10 V | |
| Short-circuit | = 0 V | |
| Response time | < 0.1 s | |
| Temperature coefficient | < 100 ppm/°C | |
| Operating temperature range | -25 – 85 °C | |
| Humidity | < 95 % | |
| Mounting | 35 mm rail | |
| Material | Polycarbonate | |
| Dimensions | 75 × 25 × 53 mm | H x W x D |
| Terminal type | Screw terminals | |
| Terminal cross-section | 0.2 – 2.5 mm² | |
| Weight | approx. 60 g | |
| Vibration | 5 g / 10 – 200 Hz | |
| EMC | EN 61326-1 EN 61326-2-3 |
Emission and immunity |
| Resistance sensor | Measurement range in °C |
|---|---|
| Pt100 | -200 – 850 |
| Pt1000 | -200 – 450 |
| Feature | Value | Remark |
|---|---|---|
| Input | Pt100 / Pt1000 | 2-/3-wire connection |
| Measuring current | approx. 0.8 mA | depends on sensor resistance |
| Zero | -200 – 600 °C | value for 0 V |
| Span | > 20 K | Zero + span = value for 10 V |
| Linearity error | < 0.1 % FS | |
| Supply voltage | 15 – 35 VDC, 15 – 26 VAC | reverse-polarity protected |
| Max. current consumption | 40 mA | |
| Output | 0 – 10 V | other voltages possible |
| Sensor break | > 10 V | |
| Short-circuit | = 0 V | |
| Response time | < 0.1 s | |
| Temperature coefficient | < 100 ppm/°C | |
| Operating temperature range | -25 – 85 °C | |
| Humidity | < 95 % | |
| Mounting | 35 mm rail | |
| Material | Polycarbonate | |
| Dimensions | 75 × 25 × 53 mm | H x W x D |
| Terminal type | Screw terminals | |
| Terminal cross-section | 0.2 – 2.5 mm² | |
| Weight | approx. 60 g | |
| Vibration | 5 g / 10 – 200 Hz | |
| EMC | EN 61326-1 EN 61326-2-3 |
Emission and immunity |
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