Features
- ±0.2, ±2, ±20, ±200, ±300V and ±600V voltage input ranges
- ±2, ±20, ±200 mA and ±5A current input ranges.
- Accuracy ±0.01% of reading ± 2 counts
Certificates of Compliance
The Laureate 4-20 mA, 0-20 mA, 0-10V or -10V to +10V and ethernet output transmitter for DC voltage and current inputs:
- DC voltmeter operation (selected by jumpers) provides and six full-scale DC voltage ranges from ±200.00 mV with 10 mV resolution to ±600.0V with 100 mV resolution. The 200.00 mV and 2.0000V ranges provide a high input impedance of 1 Gohm to minimize the load on the voltage signal.
- DC ammeter operation (selected by jumpers) provides four full-scale DC current ranges from ±2.0000 mA with 0.1 mA resolution to ±5.000 A with 1 mA resolution. The 5.000 A range measures the IR drop across a built-in 10 milliohm current shunt.
All signal conditioner board ranges are factory-calibrated, with calibration factors for each range securely stored in an onboard EEPROM. These factors can be scaled via software to accommodate external shunts, enabling field replacement of signal conditioner boards without necessitating recalibration of the associated transmitter. For optimal accuracy, factory recalibration is recommended annually. All Laurel Electronics instruments undergo factory calibration using the industry-leading Fluke calibrators, which are recalibrated yearly and certified traceable to national standards, ensuring the highest level of precision and reliability.
The optional extended Laureate computer board enhances Laureate Transmitters by displaying rates derived from successive readings and enabling highly accurate custom curve linearization. For example, it can calculate liquid volume or flow rate in a horizontal cylindrical tank using levels from a 4-20 mA transmitter. Setup is straightforward: users input up to 180 data points into a spreadsheet or text file, and the computer calculates spline-fit segments, which are then downloaded to the transmitter for precise operation.
Laureate Transmitters are easily programmed with Laurel’s free Instrument Setup Software, downloadable from our website and compatible with Windows PCs, requiring a data interface board for setup.
High read rate of up to 50 or 60 conversions per second, the Laureate™ LTE Series transmitter uses Concurrent Slope (US Pat. 5,262,780) analog-to-digital conversion to integrate signals over a full power line cycle (50 Hz or 60 Hz). This read rate enables peak and valley capture, real-time computer interfacing, and control applications. Peak and valley values are automatically captured and can be viewed using Laurel’s free Instrument Setup Software (compatible with Windows PCs) or transmitted as serial data.
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.
- Selectable transducer excitation output, (isolated), user selectable 5V@100 mA, 10V@120 mA, 12V@100mA, or 24V@50 mA.
- Power 85-264 Vac, (isolated), low-voltage 10-48 Vdc or 12-32 Vac power is optional.
Digital signal filtering modes can be selected to ensure stable readings in electrically noisy environments.
- An unfiltered selection provides true peak and valley readings and aids in control applications.
- A batch average filter selection averages each 16 conversions.
- An adaptive moving average filter selection provides a choice of 8 time constants from 80 ms to 9.6 seconds. When a significant change in signal level occurs, the filter adapts by briefly switching to the shortest time to follow the change, then reverts back to its selected time constant. An auto setting selects the time constant selection based on signal noise.
Two tare functions: auto-tare and manual tare. In auto-tare, an input line is grounded by an external pushbutton. This causes the current weight, which is normally the empty weight of the container to be stored in memory as an offset. In manual tare, the tare value can be entered manually via a control input pushbutton or using Laurel's free Instrument Setup Software.
Peak and valley values are automatically captured. These may be displayed via Laurel's free Instrument Setup Software, which runs on a PC under MS Windows or can be transmitted as serial data.
An (isolated) 5, 10, 12, or 24 Vdc excitation output is standard to power transducers or two-wire transmitters. Ratiometric operation, which automatically compensates for changes in the applied excitation, is jumper selectable for applications, such as bridges, where the signal to be measured is proportional to the excitation level.
LTE series DIN rail transmitters & signal conditioners can be interfaced to a wide range of sensors and transducers using one of seven available plug-in signal conditioner boards. The transmitters duplicate the high performance (high accuracy, high read rate) and extensive programmable features of Laureate 1/8 DIN digital panel meters, counters and timers. They utilize the same signal conditioners boards, much of the same firmware, and Laurel's free Windows-based Instrument Setup Software. They come in a compact DIN rail mount package with detachable screw-clamp connectors for easy wiring.
The LTE series Transmitters accessible from this page include a 4-20 mA, 0-20 mA, 0-10V, or -10V to +10V analog output (isolated, user selectable), an ethernet serial data interface (isolated, user selectable), and dual 120 mA solid state AC/DC relays (isolated). An (isolated) 5, 10, 12, or 24 Vdc transducer excitation output is included with all models other than those with a temperature or AC RMS signal conditioner.
Connecting Laureate LTE Transmitters to a Local Area Network (LAN)
Laurel LTE series Ethernet transmitters can connect directly to a LAN via an Ethernet cable. Up to 30 Laureate LT Transmitters and/or Digital Panel Meters can be configured for RS485 and daisy-chained to an LT Transmitter for seamless LAN integration. Setup for both configurations is streamlined using Laurel’s free Instrument Setup Software, which simplifies node discovery and transmitter configuration.
Flexible Communication Options for LTE Transmitters
Laureate Transmitters can be equipped with Laurel communication boards to support various interfaces and protocols. These include serial interfaces with ASCII or Modbus RTU protocols, and Ethernet interfaces with web access, ASCII, or Modbus TCP/IP protocols, ensuring versatile connectivity for your commercial applications.
| LTE Transmitter Signal Input & Function | Model Series | Analog Output | Ethernet I/O | Dual Relays | |
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| 1 | DC Input Voltage and Current | LTE-DC |  |
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| 2 | AC RMS Voltage or Current | LTE-RMS | |
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| 3 | Process Voltage or Current | LTE-P | |
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| 4 | Strain Gauge or Potentiometer Follower | LTE-SG | |
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| 5 | Weighing Applications | LTE-WA | |
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| 6 | Load Cell & Microvolt Signals | LTE-WM | |
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| 7 | Thermocouple (Types J, K, T, E, N, R, S) | LTE-TC | |
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| 8 | RTD Temperature | LTE-RTD | |
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| 9 | Resistance in Ohms | LTE-R | |
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| 10 | Frequency, Rate, Speed | LTE-FR | |
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| 11 | Pulse Input Totalizer | LTE-FR | |
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| 12 | Process Signal Totalizer | LTE-VF | |
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| 13 | Batch Controller Analog Input | LTE-FR | |
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| 14 | Batch Controller Pulse Input | LTE-FR | |
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| 15 | Sum, Difference, Ratio, Product of 2 Inputs | LTE-FR | |
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| 16 | On/Off Duty Cycle | LTE-FR | |
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| 17 | Stopwatch Timing for Single Events | LTE-FR | |
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| 18 | Average Time of Periodic Events | LTE-FR | |
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| 19 | AC Phase Angle and Power Factor | LTE-FR | |
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| 20 | Quadrature Position or Rate | LTE-QD | |
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DC voltage input signal transmitter
| Analog Input | Range | Resolution | Accuracy | Input Ohms |
|---|---|---|---|---|
| DC Voltage | ±200.00 mV | 10 µV | 0.01% FS ± 2 cts | 1 GΩ |
| ±2.0000 V | 100 µV | 0.01% FS ± 2 cts | 1 GΩ | |
| ±20.000 V | 1 mV | 0.01% FS ± 2 cts | 10 MΩ | |
| ±200.00 V | 10 mV | 0.01% FS ± 2 cts | 10 MΩ | |
| ±600.0 V* | 100 mV | ± 0.4 V | 10 MΩ | |
| * Range ETL certified to ±300.0 V | ||||
DC Current input signal transmitter
| Analog Input | Range | Resolution | Accuracy | Input Ohms |
|---|---|---|---|---|
| DC Current | ±2.0000 mA | 0.1 µA | 0.01% FS ± 2 cts | 100 Ω |
| ±20.000 mA | 1 µA | 0.01% FS ± 2 cts | 10 Ω | |
| ±200.00 mA | 10 µA | 0.01% FS ± 2 cts | 1 Ω | |
| ±5.000 A | 1 mA | ±10 mA | 0.01 Ω | |
| Recalibration: All ranges are calibrated at the factory. Recalibration is recommended every 12 months. | ||||
| Recalibration: All ranges are calibrated at the factory. Recalibration is recommended every 12 months. | ||||
| Input Resolution | 16 bits (65,536 steps) | |||
| Update Rate, Max | 50/sec at 50 Hz, 60/sec at 60 Hz | |||
| Max applied voltage | 600 Vac for 20, 200 & 600 V ranges, 125 Vac other ranges | |||
| Over-current protection | 25x for 2 mA, 8x for 20 mA, 2.5x for 200 mA, 1x for 5 A | |||
| Analog Output (standard) | ||||
|---|---|---|---|---|
| Output Levels | 0-20 mA or 0-10 Vdc (selectable) | |||
| Compliance, 4-20 mA | 10V (0-500Ω load) | |||
| Compliance, 0-10V | 2 mA (5 kΩ load) | |||
| Output Resolution | 16 bits (65,536 steps) | |||
| Output Accuracy | 0.02% of output span plus conversion accuracy | |||
| Output Isolation | 250V rms working, 2.3 kV rms per 1 minute test | |||
| 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 Protocols | 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 | |||
| Excitation Output (standard) | ||||
| 5 Vdc | 5 Vdc ± 5%, 100 mA (jumper selectable) | |||
| 10 Vdc | 10 Vdc ± 5%, 120 mA (jumper selectable) | |||
| 12 Vdc | 12 Vdc ± 5%, 100 mA (jumper selectable) | |||
| 24 Vdc | 24 Vdc ± 5%, 50 mA (jumper selectable) | |||
| Output Isolation | 50 Vdc from signal ground | |||
| 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, 4.0W with max excitation output | |||
| Environmental | ||||
| Operating Temperature | -40°C to 70°C (-40°F to 158°F) | |||
| Storage Temperature | -40°C to 85°C (-40°F to 185°F) | |||
| 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. | |||
| Mechanical | ||||
| Enclosure | Rugged black polycarbonate housing material | |||
| Mounting | 35 mm rail per DIN EN 50022 | |||
| Dimensions | 129 x 104 x 22.5 mm case | |||
| Connectors | Detachable screw clamp connectors meet VDE / IEC / UL / CSA standards. RJ45 jack for Ethernet | |||
| Tightening Torque | Screw terminal connectors: 5 lb-in (0.56 Nm) | |||
| Weight | Complete transmitter: 183 g (6.5 oz) | |||
| Replacement Case Screws | ||||
| Size | 6 | |||
| Thread Pitch | 6-19 | |||
| Length | 1/2" | |||
| Head Style | Pan Head | |||
| Drive Style | Phillips | |||
| Head Diameter | 0.256-0.270 | |||
| Head Height | 0.087-0.097 | |||
| Full/Partial Thread | Full | |||
| Drive Size | 2 | |||
| Material | Steel | |||
| Finished | Black Oxide | |||
| General | ||||
| Programming | Utilize Laurel's free Instrument Setup Software, which runs on a PC under MS Windows. | |||
| Security | Lockout options available using Laurel's free Instrument Setup Software. | |||
| Warranty | 3 years parts & labor | |||
| Recalibration: All ranges are calibrated at the factory. Recalibration is recommended every 12 months. | ||||
Transmitter Pinout
Free Instrument Setup Software for Series 2 Laureates
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| 1/8 DIN Digital Panel Meters | DIN Rail Transmitters |
Free Downloadable Windows-based Instrument Setup (IS) software (Data Interface Board Required) for use with our programmable Digital Panel Meters, Scale Meters, Counters, Timers, Remote Displays, and Transmitters, are an easy method to set up Laureate 1/8 DIN digital panel meters, counters, timers, remote displays, and DIN-rail transmitters, as explained in the Instrument Setup Software Manual. Laureate 1/8 DIN instruments can also be set up from the front panel, as explained in their respective Owners Manuals. Instrument Setup software is of benefit whether or not the PC is connected to the instrument.
- When the PC is connected to the instrument, Instrument Setup software can retrieve the setup file from the instrument or open a default setup file or previously saved setup file from disk View Setup, then provides graphical user interface (GUI) screens with pull-down menus applicable to input, display, scaling, filtering, alarms, communications, analog output, and front panel lockouts. Fields that are not applicable to the instrument as configured are either left out or grayed out. Clicking on any item will bring up a detailed Help screen for that item. After editing, the setup file can be downloaded, uploaded to the instrument, or saved to a disk. The same setup file can then be downloaded into multiple instruments.
- When the PC is not connected to the instrument, the above GUI screens can be used to set up a virtual instrument. The setup file can then be saved to disk. Switching toView Menu then brings up a screen with the required front panel programming steps. This view can be printed out for use at the instrument site and to serve as a hard copy record.
Download Free Instrument Setup Software
Installation
Set User Account Control (UAC) of MS Windows to "Never notifiy me" so that Instrument Setup Software can create directories. The UAC change screen can be reached as follows:
- Under Windows 7, click on the Windows Start button in the lower left of the desktop and enter "UAC" in the search field.
- Under Windows 8, navigate to Control Panel, then to the "User Accounts and Family Safety" section, and click on "Change User Account Control Settings."
- Under Windows 10, click on the Windows Start button in the lower left of the desktop, then on "Settings", and enter "UAC" in the search field.
- Reboot your computer for the changed UAC setting to take effect.
RJ11-to-DB9 cable with rear view of DB9 connector to PC
RS232 cable, meter to PC, P/N CBL01
Laureate 1/8 DIN Laureate instruments must be equipped with a serial communications board and be connected to the computer via a serial communications cable. The connection can be via RS232, RS485, USB or Ethernet. Following setup, the serial communications board may be removed from the instrument if desired. The wiring of the RS232 cable is illustrated above with end views of the two connectors.
Laureate LT Series transmitters come standard with a 3-wire serial interface, which can be jumpered for RS232 or RS485.
Laureate LTE Series transmitters come standard with an Ethernet interface.
Meter Setup Screens
Click on any of the reduced screens below for a full-size screen view, then click on the Back button of your browser to return to this page. The screens examples below are for a fully-loaded Series 2 Digital Panel Meter (DPM), which is connected to the PC via RS232. If the meter is a Series 1 meter (pre-2007), this is sensed by the software, and somewhat different screens are brought up. Please see Series 1 setup screens.
Welcome Screen
From the computer desktop, click on Start > Programs > IS2 > IS2. Or click on the IS icon on your desktop. This splash screen will be displayed for three seconds. The software revision number is in the lower right.
Communications Selection Screen
Specify your desired communication protocol and the serial communications bus type, which should match the jumper setup of the instrument. Select None if the PC is not connected to the instrument.
Establish Communications Screen
If you selected RS-232, you will be asked to specify the PC Com Port and Baud Rate, which should match the jumper setup of the instrument. Click on Establish. With the right settings, the Communications Established field will light up in green, and the Meter Type will be recognized. If so, click onMain Menu.
Main Menu Screen
Click on File > Default Setup to retrieve the default setup file from disk for your type of meter. Click on File > Open Setupto retrieve a previously saved setup file from disk or on File > Save Setup to save your edited setup file to disk. Click onDPM > Get Setup to retrieve the setup file from your meter or on DPM > Put Setup to download your edited setup file into the meter.
DPM Input + Display Setup Screen
From the Main Menu, click on View > Setup, then on theInput+Display tab. You can now specify the meter hardware, signal type, display mode, and functions of control inputs A and B. Clicking on any item brings up a pull-down menu with the available choices.
DPM Scaling Setup Screen
Click on the Scaling tab, which provides three scaling methods to relate the signal to the displayed reading: 1) Scale and Offset method, 2) Coordinates of two points method, and 3) Reading Coordinates of Two Points method. The last method uses actual high and low signals, and the computer will prompt you.
DPM Filter Setup Screen
Click on the Filter tab, which allows you to specify the digital filter time constant (if any), the adaptive filter threshold, and whether Peak / Valley values are filtered or unfiltered. As for all setup screens, clicking on the F1 key while an item is highlighted brings up a Help screen for that item, as illustrated.
DPM Relay Alarms Setup Screen
Click on the Relay Alarms tab, which allows you to set up Alarms 1 and 2 for the optional dual relay output board. Clicking on any of the four numeric fields changes these to green and brings up a special field to enter the desired numeric value, which is tied to the displayed reading.
DPM Communications Setup Screen
Click on the Communications tab so set up serial communications. In particular, you can special the Serial Protocol and the meter address if multiple meters are to be addressed on the same serial data line.
DPM Analog Output Setup Screen
Click on the Analog Out tab so set up the optional analog output board. Three output ranges are selectable, the endpoints of which can be tied to user-specified High and Low readings.
DPM Lockouts Setup Screen
Click on the Lockouts tab to check off menu items which will no longer be accessible from the front panel of the meter. This will simplify meter operation and prevent unintended setup changes.
Meter Setup Utilities
DPM Front Panel Setup Screen
As an aid to programming the meter from the front panel when a serial connection is not available, you can return to the Main Menu and click on View > Menu. The required sequence of front panel screens will then be displayed. Click on any step in the sequence for the meaning of each digit, as illustrated for the FILtEr step. For a hardcopy, simply press on Print.
DPM Jumper Setup Screen
Specify your desired communication protocol and the serial communications bus type, which should match the jumper setup of the instrument. Select None if the PC is not connected to the instrument.
DPM Jumper Setup Screens
Click on any of the displayed plug-in boards, and you will be presented with the jumper positions and electrical connections for your selected board. This minimizes the need to refer to the printed manual.
DPM Commands Screen
This page allows you set up external input, serial communications, an analog output proportional to the display (optional), and lockouts for Laureate digital counters. The grayed out area at the top right of the screen applies to Laureate remote displays.
Graphical Output Screens (not available with Ethernet)
From the Main Menu, click on Readings if your PC is connected to the meter. A pull-down menu then offers three choices: List, Plot and Graph.
- List presents the latest readings in a 20-row by 10-column table. Press Pause at any time to freeze the display. This is one method to capture peak readings.
- Plot generates a plot of readings vs. time in seconds. It effectively turns the DPM-PC combination into a printing digital oscilloscope.
- Graph generates a histogram where the horizontal axis is the reading and the vertical axis is the number of occurrences of readings. The display continually resizes itself as the number of readings increases.
DPM Calibration Screens
Click on the Scaling tab, which provides three scalClick on the Scaling tab, which provides three scaling methods to relate the signal to the displayed reading: 1) Scale and Offset method, 2) Coordinates of two points method, and 3) Reading Coordinates of Two Points method. The last method uses actual high and low signals, and the computer will prompt you.
Frequency Meter Calibration Screen
Calibration of the quartz crystal of the Laureate frequency meter requires the input of a known frequency from a calibrator. Apply the frequency, then enter the frequency in Hertz. Calibration will be automatic, with storage of the calibration factor stored in non-volatile memory.
Dimensions
Dimensioned CAD assembly drawings in EPRT, STEP, x_t, .dwg, pdf file formats: Laureate-transmitter-case.zip (zipping prevents browser from opening CAD files as text files).
CAL-Analog
Certificate of Calibration
$65.00
CBL02
USB-to-RS232 Adapter Cable
$47.00
CBL04
RS232 Cable for LT Transmitters
$47.00CBL12
12-foot Power Cable
$47.00CBL6
6-foot Power Cable
$41.00What Is the LTE Series DIN Rail Analog Transmitter with Ethernet Communication
for DC Voltage or Current Input?
In modern industrial automation and control systems, accurate signal transmission is essential for monitoring and controlling various processes. The LTE Series DIN Rail Analog Transmitter is a device specifically designed to convert DC voltage or current input signals into standardized analog outputs while also offering Ethernet communication capabilities. This combination of features makes it a versatile and powerful tool for industrial applications.
Overview of the LTE Series DIN Rail Analog Transmitter
The LTE Series DIN Rail Analog Transmitter is a device that is mounted on a DIN rail, a standardized mounting system used in control cabinets and enclosures. The DIN rail design ensures easy installation and integration into existing systems, making it a popular choice in industrial settings.
Key Features
- DC Voltage or Current Input Signal: The transmitter is designed to accept DC voltage or current input signals. These signals typically originate from sensors, transducers, or other devices that measure various parameters such as temperature, pressure, or flow. The input voltage or current range can vary depending on the specific model, allowing it to be tailored to different application requirements.
- Analog Outputs: One of the primary functions of the LTE Series DIN Rail Analog Transmitter is to convert the DC voltage or current input into a standardized analog output. Common analog output types include 4-20mA current loops or 0-10V voltage signals, which are widely used in industrial automation for transmitting data over long distances with high accuracy.
- Ethernet Communication: In addition to analog outputs, the transmitter is equipped with Ethernet communication capabilities. Ethernet allows for real-time data transmission to supervisory control and data acquisition (SCADA) systems, programmable logic controllers (PLCs), or other networked devices. This feature enables remote monitoring, control, and configuration, enhancing the overall efficiency and flexibility of the automation system.
- Precision and Reliability: The LTE Series transmitter is designed with high precision in mind, ensuring accurate signal conversion and transmission. It is also built to withstand harsh industrial environments, with robust construction and protection against electrical noise and interference.
- Scalability: The Ethernet communication feature allows for easy integration into larger networks, making it a scalable solution for expanding industrial systems. Multiple transmitters can be networked together, providing a comprehensive monitoring and control system.
Where Is the LTE DC Voltage/Current Transmitter Used?
Industrial Automation
In industrial automation, accurate signal transmission is essential for the smooth operation of processes. The LTE Series DIN Rail Analog Transmitter is widely used in these environments to convert DC voltage or current input signals from sensors or transducers into standardized analog outputs. This allows for precise monitoring and control of various processes, such as temperature, pressure, and flow rates. The Ethernet communication feature is particularly valuable here, enabling remote monitoring and data acquisition so operators can access real-time data from multiple transmitters across different locations, ensuring processes remain within desired parameters, while facilitating integration with SCADA systems.
Energy Management Systems
In power plants, substations, and renewable energy installations, this device is used to monitor DC voltage or current levels from various sources, such as solar panels, batteries, or power supplies. The transmitter converts these signals into analog outputs that can be easily interpreted by energy management systems. The Ethernet communication feature allows for seamless integration with energy monitoring software, enabling real-time data analysis and reporting crucial for optimizing energy consumption, detecting anomalies, and ensuring efficient operation of power generation and distribution systems.
Building Automation Systems
Modern building automation systems (BAS) rely on precise data from various sensors to maintain optimal environmental conditions. The LTE Series DIN Rail Analog Transmitter is commonly used in these systems to process DC voltage or current signals from sensors monitoring temperature, humidity, light levels, and occupancy. With its Ethernet communication capabilities, the transmitter can easily be integrated into a building's network, allowing facility managers to monitor and control conditions remotely — particularly useful in large buildings or campuses where centralized control is necessary for maintaining comfort and energy efficiency.
Process Control in Manufacturing
Manufacturing processes often require precise control of various parameters, such as voltage, current, temperature, and pressure. The LTE Series DIN Rail Analog Transmitter is essential in converting DC voltage or current signals from process sensors into analog outputs that can be used by controllers and other equipment. The transmitter's Ethernet communication feature enables real-time data sharing across different parts of the manufacturing facility, ensuring that all components of the process are synchronized, reducing the risk of errors and improving overall production quality.
Remote Monitoring and Telemetry
In remote monitoring and telemetry applications, the LTE Series DIN Rail Analog Transmitter is used to gather data from sensors located in hard-to-reach or hazardous environments. These sensors often output DC voltage or current signals, which the transmitter converts into analog signals for further processing. The Ethernet communication capability allows the transmitter to send data over long distances to a central monitoring station — particularly useful in applications such as environmental monitoring, oil and gas exploration, and infrastructure management, where timely data acquisition is critical for making informed decisions.
Laboratory and Research Environments
In laboratories and research facilities, the LTE Series DIN Rail Analog Transmitter is used to process DC voltage or current signals from various experimental setups. The analog outputs provided by the transmitter can be used to interface with data acquisition systems, control equipment, or other instrumentation. The Ethernet communication feature allows researchers to remotely monitor and control experiments, making it easier to manage complex setups or conduct long-term studies — especially valuable where experiments need to be monitored continuously or where environmental conditions must be tightly controlled.
Conclusion
The LTE Series DIN Rail Analog Transmitter with Ethernet communication and analog outputs for DC voltage or current input signals is a versatile and essential device in a wide range of applications. Its ability to convert DC voltage or current inputs into standardized analog outputs, combined with Ethernet communication, makes it an ideal choice for applications requiring precise signal transmission, remote monitoring, and scalability. Whether in industrial automation, energy management, building automation, manufacturing, remote monitoring, or research, this transmitter provides accurate signal conversion and reliable communication, ensuring optimal performance and efficiency in various systems — its ability to integrate with modern digital networks makes it an indispensable tool in the age of Industry 4.0 and beyond.
LTE DC Voltage and Current Transmitter Frequently Asked Questions
What's the actual difference between the LT and LTE versions of this DC voltage/current transmitter?
The underlying DC voltage and current signal conditioning, ranges, and accuracy are identical; the difference is entirely in the communication interface — LT uses RS232/RS485 serial data, while LTE uses a direct 10/100 Base-T Ethernet connection with Modbus TCP.
Do I need a separate gateway device to connect this transmitter to my network?
No — the LTE transmitter connects directly to a LAN via its own RJ45 jack, communicating over Modbus TCP without requiring a separate RS485-to-Ethernet gateway device in between.
Can LT and LTE transmitters be mixed on the same DC voltage/current application?
Yes — since the underlying signal conditioning and analog output/relay capabilities are the same across both series, a facility can use LTE transmitters where Ethernet connectivity is available and LT transmitters where a serial fieldbus is already in place, without any difference in measurement performance.
Does the Ethernet interface affect the transmitter's update rate or accuracy?
No — the update rate (up to 50 or 60 conversions per second) and accuracy (0.01% of reading ±2 counts on most ranges) are determined by the Concurrent Slope A-to-D conversion process, identical to the LT Series; the communication interface only affects how the reading is transmitted digitally.
Why is the ±600.0V range not ETL certified while the other ranges are?
The documented specification notes this range is ETL certified only to ±300.0V; the ±600.0V setting extends beyond that certified limit, so it can be used but falls outside the third-party safety certification covering the other ranges.
Can multiple LTE transmitters be addressed on the same network?
Yes — the transmitter supports up to 247 digital addresses via Modbus TCP, allowing many individually addressable transmitters to coexist on the same Ethernet network.
Does this transmitter still provide a local relay output for alarms, or does everything go through the network?
It still includes dual 120 mA solid state relays for local alarm or control, independent of the Ethernet connection, so local control action doesn't depend on network connectivity being available.
Can the Extended board's custom curve linearization be used on the LTE version?
Yes — the Extended board option supporting up to 180 data points for custom curve linearization and rate-from-consecutive-readings functionality is available on the LTE Series the same way it is on the LT Series.
What happens to the transmitter's local relay and analog output if the network connection drops?
Since the analog output and relay logic are generated locally within the transmitter based on the measured DC signal, they continue operating independently of network connectivity; only the Ethernet-based data reporting itself would be interrupted.
Is the excitation output the same as on the LT Series?
Yes — the same selectable 5V, 10V, 12V, or 24V DC excitation output, isolated 50 Vdc from signal ground, is standard on the LTE Series for powering connected transducers or two-wire transmitters.
LTE DC Voltage and Current Transmitter Questions From the Field
My transmitter isn't showing up on the network — what should I check first?
Confirming the transmitter's IP configuration (static or DHCP-assigned) matches what the network expects, and that the physical Ethernet cable and switch port are functioning, are the standard first checks before suspecting a transmitter fault.
My Modbus TCP polling occasionally times out even though the transmitter appears connected — what's the likely cause?
Network congestion or too many devices polling the same transmitter simultaneously can cause intermittent timeouts; checking polling frequency from all connected clients and network traffic load is a common troubleshooting step before suspecting a hardware issue.
My DC voltage reading is accurate but doesn't update as quickly as I expect over the network — why?
Network-side polling interval (how often the SCADA or PLC system requests data) is often the limiting factor rather than the transmitter's own conversion rate, which can update up to 60 times per second internally; checking the polling configuration on the requesting system is the first step.
My relay output triggers correctly but I don't see a corresponding change over the Ethernet interface — what should I check?
Confirming that the Modbus register mapping for relay status is correctly configured and being read by the polling system is the standard first step, since the relay's physical operation and its reporting over Modbus TCP are handled somewhat independently.
Can two LTE transmitters have an IP address conflict, and what does that look like?
Yes — an IP address conflict typically causes one or both transmitters to become unreachable or intermittently drop off the network; verifying each transmitter has a unique, correctly assigned IP address is the standard first check for this symptom.
My DC current reading on the 5A range seems less precise than the other current ranges — is that expected?
Yes — the 5A range is specified with a flat ±10 mA accuracy rather than the 0.01% FS ±2 counts accuracy of the other current ranges, reflecting the shunt-based measurement method used to extend the range to 5A; this is documented behavior rather than a fault.
My reading is noisy specifically on a low-level millivolt range — what should I check?
Low-level voltage inputs are the most susceptible to picking up external electrical noise on the wiring itself; checking cable shielding, grounding, and routing away from noisy power conductors is the standard first step, independent of the Ethernet communication layer.
After a firmware or network configuration change, my transmitter stopped responding on Modbus TCP — what should I check?
Verifying the configured IP address, subnet, and gateway settings weren't altered or reset during the change, and that the transmitter's Modbus TCP port settings match what the polling system expects, are the standard first steps.
