Threshold converter type M2218

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The threshold converter M2218 is used to check or control either a signal current or a temperature. A Pt-100 platinum sensor in 3-wire mode can be connected to the unit. It converts the input signal to an internal standard signal of 0 to 100.0%. Two independent limit contacts can be set within this range.

  • Input M2218-A: 4...20mA
  • Input M2218-T: Pt-100 0...160ºC
  • 2 alarm contacts
  • programmable
Operating Instructions
Data Sheet
Certificate
Leaflet
Software to configure and program the M2218 series.
Product Details

The threshold converter M2218 is used to check or control either a signal current or a temperature. A Pt-100 platinum sensor in 3-wire mode can be connected to the unit. It converts the input signal to an internal standard signal of 0 to 100.0%. Two independent limit contacts can be set within this range.

All settings as limit values, hysteresis, range and operating mode of the contacts can be set with a PC-program.

The unit may be programmed to customers values or ranges by the factory.

A typical application would be to measure and monitor pressure in a process vessel:
A pressure transmitter converts the pressure of 1 to 10 bar to a current signal of 4 to 20mA. The M2218 monitors under- and overpressure in the vessel. It converts the 4...20mA signal current to 0...100.0%. The alarm is set between 0% (=1 bar) and 100.0% (=10 bar). With these floating alarm contacts, overpressure valves, compressor relays, etc. are driven directly.

If a Pt-100 sensor is connected to the input, the unit works as a temperature monitor or as a simple temperature controller.

Optionally a galvanically isolated output signal of 4...20mA is available.

The 24VDC power supply is galvanically isolated from the input circuit and the output current source.