Laurel Electronics provides digital panel meters / controllers, totalizers, counters, loop-powered meters, temperature meters, for all types of transducers or process indication & control.

 Laureate™ Modbus or Laurel ASCII Protocol
Serial Output DIN Rail Transmitters

DIN Rail mounted, digitally programmable.
Exceptional accuracy at high update rates.

Serial Output Transmitters by Input Signal

Analog Input Transmitters, Modbus or Laurel ASCII I/O:

Laureate transmitters are housed in a 35 mm DIN rail case that is only 22.5 mm (0.89") thick. Signal connections are via detachable screw terminal connectors. The transmitters duplicate the performance and extensive programmable features of their Laureate digital panel meter, counter and timer counterparts. Features include exceptional accuracy at high read rate.

For DC input signals (DC, process, load cell, strain, potentiometer follower), output accuracy is ±0.01% of full scale input, as provided by the 16-bit analog-to-digital converter front end. Full conversion accuracy is maintained in the Modbus output. Advanced standard features made possible by Modbus operation include peak capture and latched relay operation, with Reset provided by external or digital commands.

Options include dual solid state relays for local alarm or control and an isolated 4-20 mA or 10V (selectable) analog output, effectively providing a linearized analog transmitter output that tracks the reading that would be transmitted digitally. The analog output provides 12-bit (4096 step) resolution of the output span and is ultra-linear to within one bit. Its accuracy is ±0.05% of span for all signal types, except for AC rms, where accuracy is ±0.1%. Output isolation from signal and power grounds is provided by a separate on-board power supply, which can drive 20 mA into a 500 ohm load for 10V compliance. Output isolation eliminates problems caused by ground loops.

Transmitter programming is via the unit's serial port using Laurel's PC-based Instrument Setup Software. This software can be downloaded from this website at no charge. The required transmitter-to-PC interface cable is available from Laurel (P/N CBL03). Laurel's serial output transmitters and meters can also be part of PC-based data logging systems using Laurel's Datalogging Software, which operates under the Laurel ASCII Protocol. A single software command switches between the Modbus and Laurel ASCII protocols.

General Specifications
Modbus Laureate Transmitters
(Click on links in previous section for details by signal type)