Laurel Electronics for Digital Panel Meters, Counters, Timers, Transmitters, Digital Displays

Digital Panel Meters - Counters - Timers - DIN Rail Transmitters - Large Digit Displays

   

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LTM Series Modbus & Serial Output
DIN Rail Transmitters
 DIN Rail mounted, digitally programmable.
Exceptional accuracy at high update rates.

Laurel Electronics Serial ASCII or Modbus Transmitters

RoHS Mark

Made in California

Models by Input Signal:

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

Pulse Input Transmitters, Modbus or Laurel ASCII I/O:Serial Input (Modbus or Laurel ASCII), Analog Output Transmitter:

Standard Features:

  • Available for wide choice of analog or pulse signal inputs
  • RS232 or RS485 serial communications, half or full duplex, isolated
  • Modbus RTU, Modbus ASCII or Laurel ASCII protocol
  • Output update rate to 60/sec
  • Switching power supply for 85-264 Vac
  • Dual solid state relays for alarm or control
  • 4, 10 or 24 Vdc transducer excitation output, isolated
  • 4-20 mA, 0-20 mA or 0-10V transmitter output, jumper selectable, isolated
  • Easy setup with PC-based Instrument Setup Software
  • DIN rail mount housing only 22.5 mm wide
  • Detachable screw-clamp connector
    Options:
  • Extended main board for custom curve linearization & rate from successive readings
  • Low voltage power 10-48 Vdc or 12-32 Vac

Removable screw terminal connections of Laurel transmittersLaureate LTM Series serial output transmitters send data via an isolated serial port, which is user configurable for RS232 or RS485 and full or half duplex operation. Three protocols are user selectable: Modbus RTU, Modbus ASCII, or Laurel ASCII. Modbus operation is fully compliant with Modbus Over Serial Line Specification V1.0 (2002). The Laurel ASCII protocol allows up to 31 Laureate devices to be addressed on the same RS485 data line. It is simpler than the Modbus protocol and is recommended when all devices are Laureates. It also allows use of Laurel Datalogging Software.

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).

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 for analog input signals. High read rate is ideal for peak or valley capture and for real-time computer interface and control. Digital signal filtering modes are selectable for stable readings in electrically noisy environments. The internal digital readings and the output can be individually selected to be either unfiltered or filtered.

Laureate LTM Series Modbus & serial output transmitters duplicate the performance and extensive programmable features of their Laureate digital panel meter, counter and timer counterparts. They are available for a wide range of analog and pulse input signals types. A related product is Laurel's TS6 serial-to-analog converter transmitter, which converts serial data to an isolated analog output.

 

 

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Laurel Electronics, Inc.
Industrial Instrumentation & Displays
3183-G Airway Avenue
Costa Mesa, CA 92626, USA
Tel:      
Fax:
     
(714) 434-6131
(714) 434-3766

  
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