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Panel Meters - Counters - Timers - Transmitters, 4-20 mA & Modbus - Ethernet - USB - RS485 - RS232

Thermocouple Transmitter, Ethernet & 4-20 mA Outputs

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

Ethernet transmitter

Features

  • Ethernet data I/O, Modbus TCP protocol.
  • 4-20 mA or 0-10V transmitter output, 16 bits, jumper selectable, isolated.
  • Dual 120 mA solid state relays for alarm or control, isolated.
  • Factory calibrated for thermocouple types J, K, T, E, N, R, S each in one range.
  • User selectable input span from entire thermocouple range down to 15.0°.
  • Analog output resolution 0.0015% of span (16 bits), accuracy ±0.02% of span.
  • Fast update rate to 50 or 60 per second.
  • Universal 85-264 Vac / 90-300 Vdc or 10-48 Vdc / 12-32 Vac power.
  • DIN rail mount housing only 22.5 mm wide, detachable screw-clamp connectors.
  • -X extended operating temperature option from -40°C to 70°C
Description

The Laureate thermocouple transmitter provides a linearized, highly accurate, stable and repeatable transmitter output for thermocouple types J, K, T, E, N, R or S. The thermocouple type and temperature range, specified in °C or °F, are user-selectable. The temperature range can be as wide as the entire span of the thermocouple type, or as narrow as 150 counts (such as 15.0°), limited only by considerations of electrical noise and digital filtering time constants.

thermocouple signal conditioner board with cold junction compensationAll ranges for all thermocouple types are digitally calibrated at the factory, with calibration factors stored in EEPROM on the signal conditioner board. This allows temperatures sensors and signal conditioner boards to be changed in the field without recalibrating the meter. For cold junction compensation (CJC), an external transistor is mounted adjacent to the thermocouple input to measure ambient termperature. That transistor is calibrated as a system with the signal conditioner board.

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 LTE transmitters include:

  • Ethernet I/O, isolated. The supported protocols are Modbus RTU and ASCII, which are tunneled via Modbus TCP. Note that RS232 or RS485 data I/O is provided by Laurel's LT Series transmitters.
  • 4-20 mA, 0-20 mA or 0-10V analog transmitter output, isolated, jumper-selectable and user scalable. All selections provide 16-bit (0.0015%) resolution of output span and 0.02% output accuracy of a reading from -99,999 to +99,999 counts that is also transmitted digitally. 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.
  • Dual solid state relays, isolated. Available for local alarm or control. Rated 120 mA at 130 Vac or 180 Vdc.
  • Universal 85-264 Vac power. Low-voltage 10-48 Vdc or 12-32 Vac power is optional.

Node discovery and configuration of Laureate Ethernet transmitters are easily achieved with Laurel's Windows based Instrument Setup Software. Additional features are provided by Laurel's Windows based Node Manager Software, such as the ability to send emails or test messages either periodically or in the event of an alarm. Both softwares run on a PC under MS Windows, are at no charge, and can be downloaded from this website.

Laureate Ethernet network by Laurel Electronics
Specifications
Laureate Ethernet & 4-20 mA Output Thermocouple Temperature Transmitter
TC Types Range Conformity Error
J -210°C to +760°C (-347°F to +1400°F) ±0.09°C (±0.16°F)
K -244°C to +1372°C (-408°F to +2501°F) ±0.1°C (±0.17°F)
L 0°C to +400°C (32°F to 752°F)
-257°C to 0°C (-430°F to +32°F)
±0.03°C (±0.05°F)
±0.2°C (±0.36°F)
E -240°C to +1000°C (-400°F to +1830°F) ±0.18°C (±0.32°F)
N -245°C to +1300°C (-410°F to +2370°F) ±0.10°C (±0.17°F)
R -45°C to +1768°C (-49°F to +3214°F) ±0.17°C (±0.31°F)
S -46°C to +1768°C (-51°F to +3213°F) ±0.12°C (±0.22°F)
Analog Input
Calibration NIST Monograph 125 (IPTS-68)
Input Resistance 1 GΩ
Input Current 100 pA
Max Lead Resistance 1 kΩ max for rated accuracy
Overall Error at 25°C ±0.01 of full scale ±2 counts
Span Tempco ±0.003% of reading/°C
Ref Junction Tempco ±0.02 deg/deg
Overvoltage Protection 125 Vac
NMR at 50/60 Hz 80 dB plus selectable filter from 80 ms to 9.6 s time constant
CMR, DC-60 Hz 120 dB with 500Ω imbalance
CMV, DC-60 Hz 250 Vac from power and earth grounds
Open Sensor Indication 0 mA or > 20 mA output, selectable
Analog Output (standard)
Output Levels 4-20 mA, 0-20 mA, 0-10 Vdc (jumper selectable)
Compliance, 4-20 mA 10V (0-500Ω load)
Compliance, 0-10V 2 mA (5 kΩ load or higher)
Output Resolution 16 bits (65,536 steps)
Output Error ±0.02% of output span ± overall input error
Output Isolation 250V rms working, 2.3 kV rms per 1 minute test
Step Response Time 50 ms
Ethernet Data I/O (standard)
Type 10/100 Base-T Ethernet per IEEE 802.3
Data Rates 300, 600, 1200, 2400, 4800, 9600, 19200 baud
Output Isolation 250V rms working, 2.3 kV rms per 1 min test
Serial Protocol Modbus TCP
Modbus Compliance Modbus over Serial Line Specification V1.0 (2002)
Digital Addresses 247
Dual Relay Output (standard)
Relay Type Two solid state relays, SPST, normally open, Form A
Load Rating 120 mA at 140 Vac or 180 Vdc
Power Input
Standard Power 85-264 Vac or 90-300 Vdc
Low Power Option 10-48 Vdc or 12-32 Vac
Power Frequency DC or 47-63 Hz
Power Isolation 250V rms working, 2.3 kV rms per 1 min test
Power Consumption 2.5W typical at 24V
Mechanical
Dimensions 129 x 104 x 22.5 mm case
Mounting 35 mm rail per DIN EN 50022
Electrical Connections Plug-in screw-clamp connectors
Environmental
Operating Temperature 0°C to 55°C standard, -40°C to 70°C with -X option
Storage Temperature -40°C to 85°C
Relative Humidity 95% at 40°C, non-condensing
Cooling Required Mount transmitters with ventilation holes at top and bottom. Leave 6 mm (1/4") between transmitters, or force air with a fan.
Pinout

Laureate Ethernet & 4-20 mA Output Thermocouple Temperature Transmitter

LTE Ethernet transmitter pinout, analog input

Operation as a Fast ON/OFF Controller or Supervisory Monitor

Temperature controller operation of Laureate temperature meters and transmitters With the optional dual solid state relay output option, which has a typical response time of only 17 ms, Laureate temperature meters and transmitters can serve as extremely fast and accurate ON/OFF controllers for closed-loop temperature control. They can also serve as supervisory process monitors and provide alarms or shutoffs when processes exceed normal limits.

Multiple setpoint operating modes are individually selectable for each relay, as explained in the dual-setpoint controller page. Relay duty cycles and chatter can be minimized with programmable hysteresis and time delays. A band deviation operating mode can be selected for each relay, where an alarm is generated whenever the reading is a selected number of counts above or below the setpoint. The relay modes have to be non-latching, since 4-20 mA temperature transmitters do not offer external reset.

For applications assistance, phone 714-434-6131 ext. 104, or email Support at Laurels
Ordering Guide
Laureate Ethernet & 4-20 mA Output Thermocouple Temperature Transmitter
Click on the radio buttons to build a model number with pricing as shown below. Prices are in US dollars and do not include shipping or duty charges (export sales). Please seeour explanations and limitations applicable to pricing and online orders. Prices shown are in US Dollars and are Laurel's manufacturer's suggested retail price (MSRP) in the USA. Orders are processed manually, not directly by our shopping cart system. You don't have to supply credit card information when placing an online order.

North American Orders. Laurel does not sell factory-direct in the USA or Canada. Online sales orders are filled through distribution. During the ordering process, you will have the chance to select an authorized Laurel distributor, or you can ask Laurel to refer you to a distributor. The distributor will then contact you to quote shipping, tax and duty (where applicable), and arrange for payment.

International Orders. If your ship-to address indicates that you are outside of the USA or Canada and Laurel has a distributor in your country, we will forward your order to that distributor for follow-up. If Laurel does not have a distributor in your country, we will email you an order acknowledgment and a pro forma invoice which states the product price, shipping charges, and wire transfer information, which includes a $25 bank wire transfer fee.

Questions about your order? Please email your distributor or sales@laurels.com
 
Quantity
Transmitter Type LTE  4-20 mA & Ethernet outputs transmitter $215
LT  4-20 mA & RS232/RS485 outputs transmitter $126
Main Board 2  Standard analog input. $0
Power 0  Isolated 85-264 Vac or 90-300 Vdc $58
1  Isolated 12-32 Vac or 10-48 Vdc $74
Thermocouple
Input
JC  Thermocouple Type J, -210°C to 760°C $63
JF  Thermocouple Type J, -347°F to 1400°F $63
KC  Thermocouple Type K, -347°C to 1372°C $63
KF  Thermocouple Type K, -408°F to 2501°F $63
TC  Thermocouple Type T, -257°C to 400°C $63
TF  Thermocouple Type T, -430°F to 752°F $63
EC  Thermocouple Type E, -240°C to 1000°C $63
EF  Thermocouple Type E, -400°F to 1830°F $63
NC  Thermocouple Type N, -240°C to 1000°C $63
NF  Thermocouple Type N, -410°F to 2370°F $63
SC  Thermocouple Type S, -46°C to 1768°C $63
SF  Thermocouple Type S, -51°F to 3214°F $63
RC  Thermocouple Type R, -45°C to 1768°C $63
EF  Thermocouple Type E, -400°F to 1830°F $63
Note:  The same signal conditioner board can be user configured for all thermocouple types listed and °C or °F.  
Add-on Options -X  Extended operating temperature option from -40°C to 70°C $25
 
Configured model number LTE20JC
Configured price per model $336
Quantity 1
Extended price $336
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