Transmitter LKM105 for Pt100
The LKM105 is a digital, configurable temperature switch for mounting in the connection head type B and is designed for the Pt100 measuring resistor according to DIN EN 60751. If the switching point is reached, a potential-free relay contact switches. A DIP switch is used to configure this as a normally closed or normally open contact. Another DIP switch allows the hysteresis to be changed. The lead resistance of the two-wire circuit can be compensated on site with the setting controller. The components are particularly protected by complete encapsulation with polyurethane.
The temperature switch is supplied adjusted to customer specifications. A subsequent change of the switching point within the switching range can be made on site with the adjustment controller and the 4 additional DIP switches.
The selection menu is available for configuration.
When entering the switching point, please note that it lies in the temperature range between -200 and 480°C.
Other sensors and larger switching ranges are possible with our digital switching transducers LKM136 (resistance sensors) and LKM137 (thermocouples).
| Input: | Pt100 | 2-wire circuit |
| Switching range: | 16 selectable ranges | between -200...480°C |
| Switching function: | normally closed / normally open | Applies for exceeding the switching temperature |
| Switching capacity: | 150W / 1250 VA | |
| Switching accuracy: | <1% FS | |
| Switching current: | max. 5A | |
| Switching voltage: | 30 VDC, 250 VAC | |
| Supply voltage: | 21...27V DC / max. 15mA | |
| Sensor break: | like too high temperature | |
| Sensor short-circuit: | like too low temperature | |
| Fine adjustment: | 10 speed potentiometer | |
| TC: | <100ppm/°C | |
| Operating temperature range: | -25…70°C | |
| Humidity: | <95% | |
| Mounting: | B-head | |
| Dimensions: | 44.5 x 26.5 mm | D x H |
| Potting compound: | Polyurethane, black | |
| Clamping type: | Screw terminals | |
| Clamping range: | 0,13...1,5mm² | |
| Weight: | approx. 40g | |
| Vibration: | 5g/10...200Hz | |
| EMC: | EN 61326-1 EN 61326-2-3 |
Emission and noise immunity |
► Operating instructions in PDF format
► Program for configuring the LKM 105 switching transmitter