Transmitter LKM274
Transmitter LKM274 for Pt100/Pt1000
The LKM274 is a digital, configurable transmitter for mounting on the standard rail and is designed for Pt100 and Pt1000 measuring resistors according to DIN EN 60751. The sensor is automatically recognized. It converts the temperature-dependent resistance value of the sensor into a standard signal of 0...10V. Four DIP switches can be used to set 13 different measuring ranges. Lead resistances are largely compensated by means of a three-wire circuit. A two-wire circuit can also be implemented.
The following measuring ranges can be configured:
| -100...100°C | -20...150°C | 0...250°C | 0...600°C** |
| -50...50°C | 0...50°C* | 0...300°C | |
| -40...60°C | 0...100°C | 0...400°C** | *Default |
| -30...70°C | 0...200°C | 0...500°C** | **Pt100 only |
| Input | Measurement range |
|---|---|
| Pt100 | -100 – 600 °C |
| Pt1000 | -100 – 300 °C |
| Feature | Value | Remark |
|---|---|---|
| Number of ranges | 13 | |
| Measuring current | 0.25 mA | |
| Current consumption | max. 10 mA | |
| Supply voltage | 15 – 35 VDC, 15 – 26 VAC | reverse-polarity protected |
| Resolution | 0.1 °C | |
| Linearity error | < 0.1 % | |
| Measurement accuracy | 0.3 % | of the measurement range |
| Measurement rate | 2/s | |
| Output | 0 – 10 V | other output voltages possible |
| Sensor break | > 10 V | . |
| Short-circuit | 0 V | |
| Terminal type | Screw terminals | 0.2 – 2.5 mm² |
| Temperature coefficient | < 0.015 K/°C | configured temperature range 0 – 100 °C |
| Operating temperature | -25 – 70 °C | . |
| Dimensions | 75 × 25 × 53 mm | H x W x D |
| Weight | 60 g | |
| EMC | EN 61326-1 EN 61326-2-3 |
Emission and immunity |
Documents
| Document | Format | Language(s) |
|---|---|---|
| Datasheet – LKM274 Technical Specification |
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| Operating Instructions – LKM274 Installation and operating manual |
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Software
| Program / Package | Format | Language(s) |
|---|---|---|
| Program – AnalogToTemperatur Conversion of analog output values (mA or V) to temperature |
ZIP | |