Motor Protection Electronics, Inc.
Motor Protection Electronics, Inc.
2464 Vulcan Rd.
Apopka, Florida 32703
Phone: 407-299-3825
Fax: 407-294-9435
Email: justin_logan@mpelectronics.com
Website: www.mpelectronics.com
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The LPC420R (Level Probe Converter with Relays) shall sense liquid level and provides a 4 to 20 mA analog output for use by a pump controller or PLC to control liquid level. The LPC420 shall monitor the ten electrodes on a conductance Level Probe, and provide an analog signal that is proportional to the level. The LPC420R shall provide 10 relay outputs with contacts that close as the liquid covers the respective Level Probe electrodes.
MPE LPC420R Level Probe Converters with Relays
Unit of Measure
Items MPE LPC420R Level Probe Converters with Relays
LPC420R
Din Rail Mount Level Probe Converter with Relays 		Reverse Mount Level Probe Converters with Relays
LPC420R-RM
Reverse Mount Level Probe Converter with Relays
Maximum Input Power N/A 7.7 V·A24 VDC ± 10%, 160 mA 120 VAC ± 10%
Non-Isolated Analog Output Current N/A 4 to 20 mA
Analog Output Maximum Load N/A 600 O
Relay Output at 120 Volt Alternating Current (AC) Voltage N/A 6 N/A 6 A
Sensor Output Voltage N/A ± 8 V Square Wave at 60 Hz
Maximum Sensor Output Current (Per Sensor) N/A 0.8 mA
Operating Temperature N/A -20 to +65 ºC
Storage Temperature N/A -45 to 85 ºC
Enclosure Material N/A Din Rail Mounted Aluminum N/A Panel Mounted Aluminum
Sensor Output Current N/A 4 to 20 mA N/A
Sensor Output (±) N/A 8 V N/A
Nominal Direct Current (DC) Voltage N/A 24 V120 V N/A
Test Standards N/A N/A cUL cUS
Additional Description N/A

All setup shall be done using four DIP switches on the face of the LPC420R. The Sensitivity of the unit shall be set for the type of liquid being detected. The Analog Output Delay setting provides shall control how fast the analog output transitions from one level output value to another. The Analog Output Delay setting value shall take approximately ten times the selected setting to go from 4mA to 20mA when the electrodes are covered quickly. When the electrodes are slowly covered one at a time, the Analog Output Delay shall provide a smooth transition as the level changes from electrode to electrode.

The LPC420R shall have an aluminum, Din Rail mountable enclosure. There shall be no openings in the LPC420R enclosure for debris to enter. The face of the LPC420R shall provide visual indication for the Level Probe electrodes that have been covered with water.

The LPC420R shall be powered by either 120 VAC or 24VDC, and provide a ground lug for proper connection to panel/earth ground. The Sensor output voltage shall be a ± 8V Square wave for use with a conductance Level Probe. The Level Probe Converter with relays shall be a UL Listed product.

 		N/A All setup is easily done using the four DIP switches on the unit. The Sensitivity of the unit must be set for the type of liquid being detected. The Analog Output Delay setting provides control over how fast the analog output transitions from one level output value to another. It takes 10 times the Analog Output Delay setting value to go from 4 to 20 mA, when the electrodes are covered quickly. When the electrodes are slowly covered one at a time, the Analog Output Delay is used to provide a smooth transition as the level goes from electrode to electrode.
Typical Applications N/A N/A For use with any 10 electrode conductance probe where an analog 4 to 20 mA level signal, relay outputs and a panel mounted level display are required.