4-20 mA Current Output Transmitter for DC Voltage or Current Input

DIN Rail mounted, digitally programmable. Exceptional accuracy at high update rates.
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4-20 mA Current Transmitter for DC Voltage or Current
Standard Features
  • 0.2, 2, 20, 200, 300V & 600V voltage ranges
  • 2, 20, 200 mA & 5A current ranges
  • All input ranges user selectable & factory calibrated
  • 4-20 mA, 0-20 mA or 0-10V transmitter output, jumper selectable, isolated.
  • Output resolution: 0.0015% of span (16 bits)
  • Output accuracy: ±0.02% of span
  • Detachable screw-clamp connectors
  • 5V, 10V or 24V dc transducer excitation output, isolated
  • Dual solid state relays for alarm or control, isolated
  • RS232 or RS485 serial communications, isolated
  • Priced at only $235 with universal 85-264 Vac power
Options
  • Extended main board for custom curve linearization & rate from successive readings.
  • Low voltage power, 10-48 Vdc or 12-32 Vac
Description

The Laureate 4-20 mA output, DC input transmitter provides six voltage input ranges and four current input ranges, all factory calibrated and jumper selectable. The 200.00 mV and 2.0000 V ranges provide a high input impedance of 1 Gohm to minimize the load on the voltage signal. A 5.000A range measures the IR drop across a built-in 10 mW current shunt. The transmitters can also easily be scaled in software for use with external shunts.

Three analog transmitter output settings are jumper selectable: 4-20 mA, 0-20 mA or 0-10V. All selections provide 16-bit (0.0015%) resolution of output span and 0.02% output accuracy. The output tracks the reading from -99,999 to +99,999 counts that would be transmitted digitally. For DC signals, this reading has a rated accuracy of ±0.01% of full scale input and can be scaled in software. Output isolation from signal and power grounds eliminates potential ground loop problems. The supply can drive 20 mA into a 500 ohm (or lower) load for 10V compliance, or 10V into a 5K ohm (or higher) load for 2 mA compliance.

Fast read rate at up to 50 or 60 conversions per second while integrating the signal over a full power line cycle is provided by Concurrent Slope (Pat 5,262,780) analog-to-digital conversion. High read rate is ideal for peak or valley capture and for real-time computer interface and control.

Standard features of Laureate transmitters include:

  • Analog transmitter output, 16-bit, user scalable and isolated. User selectable 4-20 mA, 0-20 mA or 0-10V levels.
  • Serial communications, isolated. User selectable RS232 or RS485, half or full duplex, Modbus or Laurel ASCII protocol.
  • Dual solid state relays for control or alarm, isolated. Rated 120 mA at 130 Vac or 170 Vdc.
  • Transducer excitation output, isolated. User selectable 5V@100 mA, 10V@120 mA or 24V@50 mA.
  • Universal AC power supply for 85-264 Vac.

Easy Transmitter programming is via Laurel's Instrument Setup Software, which runs on a PC under MS Windows. This software can be downloaded from this website at no charge. The required transmitter-to-PC interface cable is available from Laurel (P/N CBL04).