LKM200: Digital Temperature Transmitter for Versatile Applications
The LKM200 is designed for temperature measurements in various industrial applications, where the sensor, measurement range, and output signal can all be individually configured. The four-wire connection for resistance thermometers compensates for lead resistance, but three- and two-wire connections are also possible.
Versatile Connectivity: The LKM200 supports resistance thermometers according to DIN EN 60751, thermocouples according to DIN EN 60584 and DIN 43710, as well as resistances up to 6 kΩ, covering a wide range of analog temperature sensors.
Customizable Output Signal: To ensure maximum compatibility with existing components, an output signal of 4...20 mA or 0...10 V can be set. Individual scaling up to 10 V is also possible for the voltage output signal.
Reliable Sensor Connection: The galvanically isolated sensor connection ensures interference-free measurements, particularly for thermocouples.
Easy Configuration: Use the DIP switches for local configuration without additional hardware or software, or adjust the LKM200 precisely to your needs via the USB-C interface.
Order options:
- Standard Configuration: Ideal for customers who do not yet want to commit themselves. The transmitter is supplied with the following configuration: Input: Pt100 4-wire, measuring range 0...100 °C, output: 4...20 mA.
- Custom Configuration: Tailor the transmitter to your specific needs! Choose from various options and receive a customized solution that is ready for installation.
- Please note that the desired measuring range must be within the specification range of the sensor used and its minimum measuring span must be taken into account.
- Free scaling is possible for the voltage output, but the difference between the start and end value must be at least 2.00 V (e.g. 10.00 ... 0.00 V or 1.25 ... 3.25 V).
- Our team will check your configuration for technical feasibility. If there are any queries, we will get in touch with you to find a suitable solution together.
Accessories for your LKM200:
- External Pt100 Reference Junction: For precise comparative measurements with connected thermocouples.
- Compatible Cable Probes: High-quality cable probes for thermocouples and resistance thermometers, individually customizable.
| Input | Maximum range | Accuracy |
|---|---|---|
| Resistance | 0 – 6000 Ω | ±0.01 Ω |
| Pt100 | -200 – 820 °C | ±0.02 K |
| Pt1000 | -200 – 850 °C | ±0.02 K |
| Ni100 TK6180 | -60 – 250 °C | ±0.1 K |
| Ni1000 TK6180 | -60 – 250 °C | ±0.1 K |
| Thermocouples | ||
| Type B, Pt30Rh–Pt6Rh | 300 – 1820 °C | ±0.5 K |
| Type C, W5Re–W26Re | 0 – 2315 °C | ±0.5 K |
| Type E, NiCr–CuNi | -150 – 950 °C | ±0.5 K |
| Type J, Fe–CuNi | -200 – 1200 °C | ±0.5 K |
| Type K, NiCr–Ni | -200 – 1370 °C | ±0.5 K |
| Type N, NiCrSi–NiSi | -200 – 1300 °C | ±0.5 K |
| Type R, Pt13Rh–Pt | -50 – 1760 °C | ±0.5 K |
| Type S, Pt10Rh–Pt | -50 – 1760 °C | ±0.5 K |
| Type T, Cu–CuNi | -250 – 400 °C | ±0.5 K |
| Type U, NiCr–Ni | -250 – 600 °C | ±0.5 K |
| Resistance sensor | Thermocouple | |
|---|---|---|
| Linearity error | < 0.01 K | < 0.3 K |
| Cold-junction error | - | ±0.5 °C |
| Span | > 20 K | > 200 K |
| Sensor wiring | 2-, 3- or 4-wire | - |
| Sensors via DIP switch | Pt100 4-wire | Types J, K, N, S |
| Ranges via DIP switch | 15 | 4 each |
| Output 4 – 20 mA | Output 0 – 10 V / 0 – 5 V | |
|---|---|---|
| Sensor break | 20.5 mA | 10.5 V / 5.5 V |
| Sensor short (resistance) | < 4 mA | = 0 V |
| Sensor short (thermocouple) | current value for ambient temperature | voltage value for ambient temperature |
| Note: with inverted output the error behaviour is inverted as well. | ||
| Value | Remark | |
|---|---|---|
| Output signal | 4 – 20 mA, 0 – 5 V, 0 – 10 V | or inverted |
| Output via DIP switch | 4 – 20 mA or 0 – 10 V | |
| Galvanic isolation | 1500 VAC | 1 min |
| Measuring current (resistance) | 0.25 mA | |
| Loop supply | 8.5 – 36 V DC | for current output, reverse polarity protected |
| Supply voltage | 15 – 35 V DC | for voltage output, reverse polarity protected |
| Max. current consumption | 23 mA | at 24 V DC |
| Operating temperature | -40 – 85 °C | |
| Max. ambient humidity | 95 % RH | |
| Temperature coefficient | < 10 ppm / K | |
| Output resolution | 14 Bit | |
| Interface | USB-C | |
| Measurement rate | 2 / s | |
| Input terminals | Screw terminals | 0.2 – 1.5 mm² |
| Output terminals | Screw terminals | 0.2 – 2.5 mm² |
| Mounting | 35 mm DIN rail | |
| Dimensions | 89.7 × 17.8 × 60.7 mm | H × W × D |
| Material | Polycarbonate | |
| Weight | 60 g | |
| Protection class | IP20 | |
| Vibration | 5 g / 10 – 200 Hz | |
| EMC | EN 61326-1 EN 61326-2-3 |
Emission and immunity |
Documents
| Document | Format | Language(s) |
|---|---|---|
| Datasheet – LKM200 Technical specification |
  |
|
| Operating Instructions – LKM200 Installation and operating manual |
|
Software
| Program / Package | Format | Language(s) |
|---|---|---|
| Service program for LKM200 (Windows PCs) Parameterization software |
ZIP | |
| Program – AnalogToTemperatur Conversion of analog output values (mA or V) to temperature |
ZIP | |
| Driver (ftdichip.com) USB driver |
Web | |
