Laurel Electronics LT2 ACA/ACV-to-4-20 DCmA & RS232/RS485 Transmitter

LT2 ACA/ACV-to-4-20mA Series*

The Laurel Electronics LT2 RMS AC Current and AC Voltage transmitter provides four current input ranges and six voltage input ranges, all factory calibrated and jumper selectable. A special 5.000A range utilizes a built-in 0.01 ohm shunt resistor to accept the output of 5A current transformers, with no need for a stepdown transformer. The current readings can be scaled digitally as needed. High common mode rejection allows stable readings with current shunts located on the high side of the line. Digital filtering is selectable for noisy signals.

True RMS precision circuitry is used to determine the root-mean-square of complex waveforms from DC to 10 kHz. Spikes up to 3.0 times the maximum of each range are accurately measured.

True RMS readings in as little as one 50/60 Hz AC line cycle are unmatched in the industry. Such a high read rate allows anomalies to be detected and alarmed before they become expensive problems. On/off control and alarm can be achieved dual solid state relays, which are standard. Transmitter can also capture peak and valley for times as short as one 50/60 Hz AC power line cycle.


  • 4-20 DCmA, 0-20 DCmA, 0-10 DCV or -10 to +10 DCV transmitter output, 16 bits, isolated
  • RS232 or RS485 serial data output, Modbus or Laurel ASCII protocol, isolated
  • Dual 120 mA solid state relays for alarm or control, isolated
  • True AC RMS measurement in one 50/60 Hz AC line cycle
  • 0.2, 2, 20, 200, 300V and 600V AC voltage ranges
  • 2, 20, 200 mA and 5A AC current ranges
  • All input ranges user-selectable and factory calibrated
  • AC or DC coupling for signals from DC to 10 kHz
  • Measurements from 0% to 100% of full scale
  • 0.03% accuracy of full scale at crest factor to 3.0
  • Universal 85-264 ACV / 90-300 DCV or 10-48 DCV / 12-32 ACV power
  • DIN rail mount housing only 22.5 mm wide, detachable screw-clamp connectors
More Information
Input AC Current, AC Voltage
Manufacturer Laurel Electronics
Output 0-10 DCV, 0-20 DCmA, 4-20 DCmA, RS232 Serial Data, RS485 Serial Data
Power ACV, DCV
Type Transmitters
Additional Skus LT20, LT21, LT20RMV1, LT20RMV2, LT20RMV3, LT20RMV4, LT20RMV5, LT20RMV6, LT20RMA1, LT20RMA2, LT20RMA3, LT20RMA4, LT21RMV1, LT21RMV2, LT21RMV3, LT21RMV4, LT21RMV5, LT21RMV6, LT21RMA1, LT21RMA2, LT21RMA3, LT21RMA4
Additional Details

*Pricing & appearance may vary based on configuration!* Please configure product above.
Please note: Many of our Panel Meters require modification before shipping. In these cases, delivery may be 3-5 days.

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