LAUREL LTE Series User manual

LTE SERIES
TRANSMITTERS
Analog Input,
Ethernet & Isolated 4-20 mA Outputs
USER MANUAL
LAUREL Electronics Inc.
3183-G Airway Ave, Costa Mesa, CA, 92626, USA
Tel: [phone] •Fax: [phone] •Website: www.laurels.com

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1. ORDERING GUIDE
Configure a model number in this format: LTE20DCV1
Transmitter Type
LTE.... Ethernet and isolated
4-20 mA, outputs, two 120 mA
solid state relays, and isolated
transducer excitation output.
Main Board
2...............Standard main board
4...............Extended main board
Note: Extended main board
adds rate of change and custom
curve linearization. Not applic-
able to temperature.
Power
0...... 85-264 Vac or 90-300 Vdc
1.......... 12-32 Vac or 10-48 Vdc
Input Type
DC Volts
DCV1..................... ±200.00 mV
DCV2.........................±2.0000 V
DCV3.........................±20.000 V
DCV4.........................±200.00 V
DCV5*.........................±600.0 V
DCV6...........................±300.0 V
DC Amperes
DCA1......................±2.0000 mA
DCA2......................±20.000 mA
DCA3......................±200.00 mA
DCA4...........................±5.000 A
RMS Volts
RMV1.......................200.00 mV
RMV2..........................2.0000 V
RMV3..........................20.000 V
RMV4..........................200.00 V
RMV5*..........................600.0 V
RMV6............................300.0 V
RMS Volts
RMV1 ...................... 200.00 mV
RMV2 ......................... 2.0000 V
RMV3 ......................... 20.000 V
RMV4 ......................... 200.00 V
RMV5* ......................... 600.0 V
RMV6 ........................... 300.0 V
RMS Amperes
RMA1 ...................... 2.0000 mA
RMA2 ...................... 20.000 mA
RMA3 ...................... 200.00 mA
RMA4 ........................... 5.000 A
* Range not ETL certified.
Process & Ratio Signals
4-20 mA, 0-10V, etc.
P…...4-20 mA in = 4-20 mA out
P1…………….Custom Scaling
Specify min input and output,
max input and output.
Load Cell & Strain Gauge
4- or 6-wire ratio. Full scale
ranges from 20 to 500 mV.
WM1...........-99,999 to +99,999
Specify min input and output,
max input & output.
RTD Temperature
Pt100, P385C..... -202 to 850°C
Pt100, P385F ....-331 to 1562°F
Pt100, P392C.... .-202 to 850°C
Pt100, P392F ....-331 to 1562°F
Ni120, 672C........ .-80 to 260°C
Ni120, 672F ........-112 to 500°F
Cu10, 427C ......... .-97 to 260°C
Cu10, 427F .........-143 to 500°F
Thermocouple Temperature
JC .......................-210 to 760°C
JF...................... -347 to 1400°F
KC.....................-244 to 1372°C
KF ..................... -408 to 2501°F
TC .......................-257 to 400°C
TF ....................... -430 to 752°F
EC .....................-240 to 1000°C
EF ..................... -400 to 1830°F
NC.....................-245 to 1300°C
NF.................... .-410 to 2370°F
SC.......................-46 to 1768°C
SF ....................... -51 to 3214°F
RC.......................-45 to 1768°C
RF....................... -49 to 3213°F
Resistance
R0.........0-2 ohms (fixed range)
R1............................0-20 ohms
R2..........................0-200 ohms
R3…………...…..... 0-2 kohms
R4.......................... 0-20 kohms
R5........................ 0-200 kohms
R6......0-2 Mohms (fixed range)

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2. TABLE OF CONTENTS
1. Ordering Guide.................................................................................................................. 2
2. Table of Contents .............................................................................................................. 3
3. Complementary Manuals .................................................................................................. 4
4. Product Overview.............................................................................................................. 5
5. Receiving & Unpacking Your Transmitter ......................................................................... 6
6. Safety Considerations ....................................................................................................... 6
7. LTE Transmitter Main Board Jumpers & Field Wiring ....................................................... 7
8. Installing Instrument Setup (IS) Software......................................................................... 9
9. Programming Your Transmitter ........................................................................................ 10
10. Opening Your Transmitter Case ........................................................................................ 19
11. DC Signal Conditioner Board............................................................................................. 20
12. AC Rms Signal Conditioner Board ................................................................................... 22
13. Load Cell Signal Conditioner Board................................................................................... 24
14. Thermocouple Signal Conditioner Board .......................................................................... 26
15. RTD & Ohms Signal Conditioner Board ............................................................................ 28
16. Dual Relay Operation ........................................................................................................ 30
17. Input Signal Filtering......................................................................................................... 32
18. Transmitter Calibration...................................................................................................... 33
19. Custom Curve Linearization .............................................................................................. 33
20. Modbus Protocol Transmitter Communications ............................................................... 34
21. Custom ASCII Protocol Transmitter Communications ...................................................... 39
22. Specifications, LTE Series Analog Input Transmitters....................................................... 44
23. Warranty ........................................................................................................................... 48

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3. COMPLEMENTARY MANUALS
This manual covers LTE Series DIN rail transmitters with isolated Ethernet and 4-20 mA outputs,
dual relays, and an analog input signal conditioner. It covers hardware aspects such a pinout and on-
board jumpers, and transmitter setup such as scaling and relay setpoints. It also presents the
main commands and text strings to be used with the Modbus and Custom ASCII communications
protocols. It is intended to be used with the following separate manuals:
•Ethernet Manual. Covers Ethernet Node discovery and setup using Node Manager PC
Software or the Web Server Software built into each Node. Required for use of Ethernet
transmitters and normally shipped with this manual.
•Modbus Communications Manual. Covers strings and commands to be used with the
Modbus protocol (if selected). Intended for programmers.
•Serial Communications Manual. Covers strings and commands to be used with Custom
ASCII protocol (if selected). Intended for programmers.
LT Series DIN rail transmitters with isolated 4-20 mA and RS232/RS485 outputs, dual relays,
and a pulse input signal conditioner are covered in a separate manual.

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4. PRODUCT OVERVIEW
LTE Series transmitters duplicate the signal conditioning and signal processing features of their
1/8 DIN panel-mounted digital panel meter counterparts for exceptional accuracy at high read
rates. A wide range of analog signal sources are accommodated by five analog signal
conditioners, which are the same as for our panel meters:
•DC input for volts, amps, process signals (e.g., 4-20 mA), and strain gauges. Most sensitive
full scale input range of 200 mV. Built-in 5A current shunt.
•AC rms input for volts and amps. Can be AC or DC coupled. Built-in 5A current shunt.
•Load cell or microvolt input with selectable full scale input ranges from 20 mV to 500 mV.
•Thermocouple temperature input for seven thermocouple types.
•RTD temperature or Ohms input for Pt100, Ni120 or Cu10 RTDs, or 20Ω-200 kΩΩresistance.
An isolated 4-20 mA, 0-20 mA or 0-10V output is standard. This output is generated by an ultra-
linear 16-bit digital to analog converter which tracks an internal linearized digital reading.
Isolated Ethernet communications are standard via an RJ45 connector for a 10/100BaseT
interface. Four serial communication protocols are understood by our transmitters: Modbus TCP,
Modbus RTU, Modbus ASCII, and Custom ASCII (a simpler protocol than Modbus).
An isolated transducer excitation output is standard. Three output levels are jumper selectable:
5V at 100 mA, 10V at 120 mA, or 24V at 50 mA. The factory default setting is 10V and can power
up to four 350 ohm load cells in parallel.
Two isolated solid state relays are standard. These are rated 120 mA at 140 Vac or 180 Vdc.
Isolation to 250V rms is provided for power, signal input, analog output, relay outputs, and com-
munications. Isolation adds safety and avoids possible ground loops. The transducer excitation
output is isolated to ±50V from signal ground.
Internal jumpers are used to select the signal range and excitation level. The transmitter
configuration is specified by the model number on the transmitter label. A user can reconfigure
the transmitter by opening the case and moving jumpers.
Transmitter scaling is via serial connection to a PC using MS Windows based Instrument Setup
Software, which can be downloaded at no charge.

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5. RECEIVING & UNPACKING YOUR TRANSMITTER
Your transmitter was carefully tested and inspected prior to shipment. Should the transmitter be
damaged in shipment, notify the freight carrier immediately. In the event the transmitter is not
configured as ordered or is inoperable, return it to the place of purchase for repair or replacement.
Please include a detailed description of the problem.
6. SAFETY CONSIDERATIONS
Warning:Use of this transmitter in a manner other than specified may impair the protection
of the device and subject the user to a hazard. Do not attempt to operate if the unit shows visible
damage.
Cautions:
•This unit may be powered from 85-264 Vac or with the worldwide voltage power supply
option, or from 12-32 Vac or 10-48 Vdc with the low voltage power supply option. Verify that
the proper power option is installed for the power to be used.
•The 85-264 Vac power connector (P1 Pins 1-3) is colored Green to differentiate it from other
input and output connectors. The 12-32 Vac or 10-48 Vdc power connector is colored Black.
This transmitter has no power switch. It will be in operation as soon as power is applied.
•To avoid dangers of electrocution and/or short circuit, do not attempt to open the case while
the unit is under power.
•To prevent an electrical or fire hazard, do not expose the transmitter to excessive moisture.
Do not operate the transmitter in the presence of flammable gases or fumes, as such an
environment constitutes an explosion hazard.
Symbols applicable to this product:
Caution (refer to accompanying documents)
Earth (ground) terminal.
Caution, risk of electric shock.
Both direct and alternating current.
Equipment protected throughout by double
insulation or reinforced insulation.
4006497
ETL Mark. Indicates that product
conforms to UL Std. 61010-1 and is
certified to CAN/USA Std. C22.2 No.
61010-1. Mark pending as of Oct
2013.
CE Mark. Indicates that the product meets
EU safety, health and environmental requi-
rements.
Operating environment:
Transmitter Class II (double insulated) equipment designed for use in Pollution degree 2.

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7. LTE TRANSMITTER MAIN BOARD JUMPERS & FIELD WIRING
An RJ45 Ethernet connector allows the transmitter to be connected directly to a computer, router,
switch or hub via an Ethernet cable. An isolated analog output and dual relays are also standard.
Jumpers on the main board allow selection of the following:
•Analog output (current or voltage). This output is sourcing. Do not apply an external voltage.
Applying an external voltage of 24 Vdc will burn out the transmitter main board.
•Excitation output. Note that attempting to draw more than the rated transducer excitation
output current will shut down the output.
Jumpers on analog signal conditioner boards are described in later manual sections. Normal
operation, as opposed to factory test, requires that the E6 jumper be installed as shown.
To reset the transmitter (same as power-up), press the Reset button.
To reset communications to 9600 baud, command mode, Custom ASCII protocol, and Address 1,
place a jumper at E1, turn power on and off, remove the jumper, and restart the transmitter.
Analog Output
Jumpers
Current (0-20 or 4-20 mA)
E2 a+ d
Voltage (0-10V)
E2 b+ c
Communication Reset
Jumper
Jumper + power-up
E1
Excitation Output
Jumpers
5V, 100 mA
E3 a+ c; E4 a
10V, 120 mA
E3 a+ c; E4 b
24V, 50 mA
E3 b, E4 none

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P5

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The Ethernet connector for all of our Ethernet Nodes is provided by an RJ45 jack, Green and
amber LEDs on the jack indicate network operation:
1) Following power-up, the green and amber LEDs are on
steady until an IP address has been assigned to the Node.
2) Once an IP address has been assigned to the Node, the
amber LED is turned off. It will light up whenever the Node
detects data packet activity.
3) When the Node has made a TCP connection, the green LED
alternates on (1 sec) and off (1 sec), while the amber LED is
on steady.
Ethernet cables (CAT5 or better) can be straight-through or crossover. Our Ethernet Nodes
automatically adapt for either.
8. INSTALLING INSTRUMENT SETUP SOFTWARE
OVERVIEW
LTE transmitters are easily programmed by connecting them to the same LAN as a PC or by
connecting them directly to a PC with an Ethernet cable, and then running Instrument Setup
Software on the PC. This MS Windows based software allows Node and Device discovery,
uploading, editing, downloading and saving of setup data, execution of commands under
computer control, listing, plotting and graphing of data, and computer prompted calibration.
INSTALLING INSTRUMENT SETUP SOFTWARE
Set User Account Control (UAC) to "Never notifiy" so that Datalogging
Software can create directories. The UAC change slider, illustrated to the right,
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.
Download the file ISx_x_x.exe from our website and double-click on the file name.
Click on Install Instrument Setup and follow the prompts.
Ethernet Indicators
8
7
6
5
4
3
2
1
Amber LED
Green LED
RX -
RX +
TX -
TX +

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9. PROGRAMMING YOUR TRANSMITTER
LAUNCHING INSTRUMENT SETUP SOFTWARE
Connect your LTE transmitter to your PC via an Ethernet cable, or connect the transmitter to the
same LAN as the PC. To launch IS software, press on Start => Programs => IS2 => Instrument
Setup or on the desktop icon that you may have created. Following a brief splash screen, the
Communications Setup screen will appear.
In the Communications Setup screen, select Transmitter LTE as the Device Type, Ethernet as
the Communication Type, any of the protocols listed.
Upon clicking on Ethernet for the first time, you may be presented with the Windows Security
Alert shown below. Click on Unblock, and IS software will be launched. If you ever click on
Keep Blocking, IS software will not be able to establish Ethernet communications. You will then
need to restore Windows Firewall defaults by clicking on Control Panel => Windows Firewall =>
Advanced => Restore Defaults.

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The Node Discovery tab under Node Setup will open once you have passed the Windows
Firewall. With a direct cable connection to the PC, only one Ethernet Node will be listed. With a
LAN connection, multiple Ethernet Nodes may be discovered on the same LAN. Select the Node
which is integral with your transmitter Device.

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Click on the Device Discovery tab, and all Devices attached to your Node will be listed. With an
LTE transmitter, the transmitter will be the only Device listed. With a device server Node, there
can be up to 30 Devices (meters and transmitters) on an RS485 bus. Please see our Ethernet
manual.
Highlight your Node, and you can assign a descriptive name to it, such as Tank Farm. The
default name is the Node’s unique MAC address. You can also use this tab to change your
Node’s communication settings. Press Get to retrieve settings from the Node to the PC. Press
Put to write settings from the PC to the Node.
Highlight your Device, and you can assign a descriptive name to it, such as Tank Level. Press
Get to retrieve settings from the Device to the PC. Press Put to write settings from the PC to the
Device.

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Click on the Advanced Settings tab, and you will be given the opportunity to change the Node’s
TCP and UDP Port settings. Press Get to retrieve settings from the Node to the PC. Press Put to
write settings from the PC to the Node.
If a browser is to access our Nodes on a remote LAN over the Internet, port forwarding must
first be set up for the router that controls the remote LAN. The default port numbers pro-
grammed into our Nodes are UDP port 63179 for Node discovery and TCP port 502 for Modbus
TCP. If these ports are blocked by the router or by a firewall, different port values can be entered
into our Nodes. You or your company’s IT department will then also need to set up the remote
router to forward these different port values.

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To reach the above Input+Display tab screen, follow this procedure:
1) Highlight your device under the Device Discovery tab.
2) Click on the Main Menu button. A new DPM Main Menu window will open with a help screen.
3) Click on DPM in the top menu bar. Our analog input transmitters and DPMs use the same
software. While a scaled digital reading is not displayed by transmitters, it is used internally.
4) Click on Get Setup to retrieve the setup data currently in the transmitter.
5) Click on View => Setup to reach the above setup window with five tabs.
The Input+Display tab is used to set up Signal Input, Display, and Control Inputs. Note that IS
Software reads the signal conditioner type, but not the range, which is set by jumpers. The
50/60 Hz Line Freq selection is used for best noise rejection at AC line frequency. Click on Read
to display the current reading. Press the F1 key for help with any highlighted item.
For ratiometric operation with a DC signal conditioner, set the Signal Input Mode to Ratio. In this
mode, the transmitter tracks a ratio of the applied excitation voltage and is unaffected by
changes in the excitation voltage. This capability is used for resistive bridge sensors and voltage
dividers, such as potentiometers which track wiper position.
Clicking on the Control Inputs field opens a pull-down menu which allows selection of the roles
of Control Input 1, Control Input 2, and simultaneous Control Inputs 1 and 2. For example, with
a DC signal conditioner and the highlighted selection, grounding Control Input 1 places the
transmitter on Hold, grounding Control Input 2 causes the Peak reading to be transmitted, and
grounding both Control Inputs 1 and 2 causes a Function Reset, which resets Peak, Valley and
latched alarms. Note that the roles of the Control Inputs vary with the type of signal conditioner.
Only the applicable roles will be displayed.

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Click on the Scaling tab to scale your transmitter. You will be given the choice of three scaling
methods: 1) Scale and Offset method, 2) Coordinates of 2 points method where (Low In, Low
Read) and (High In, High Read) data points are entered numerically, and 3) Reading Coor-
dinates of 2 points method, which captures actual readings.
Click on the Filter tab to set to set up filtering for your readings. The filter time constant can be
automatic, be specified in seconds, or be turned off. The adaptive threshold modifies the time
constant in response to noise. A low adaptive threshold is recommended for normal low noise.
A high adaptive threshold is recommended for high noise environments.

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Click on the Relay Alarms tab to set up your transmitter’s two solid state relays, which are
standard. Press the F1 key for help with any highlighted item.
Click on the Analog Out tab to scale your analog output, which is standard. Under Range, select
0-20 mA Current, 0-10V Voltage, or 4-20 mA. Type in your Lo Range Reading and Hi Range
reading. These will create the two endpoints of your analog output range. Press the F1 key for
help with any highlighted item.

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PULL-DOWN MENU FEATURES
•The File pull-down menu allows you to save setup files to disk by pressing on Save Setup and
to open setup files from disk by pressing on Open Setup. Opened setup files can then be edited
on the PC, be saved to disk, and be downloaded into Devices by using DPM => Put Setup.
•The Commands pull-down menu allows you to execute certain functions by using your
computer mouse. This menu will be grayed out unless a Get Setup has been executed.
•The Readings pull-down menu provides three formats to display input data on your PC
monitor. Use the Pause and Continue buttons to control the timing of data collection, then
press Print for a hardcopy on your PC printer.
-List presents the latest internal readings in a 20-row by 10-column table. Press Pause at any
time to freeze the display. Press Print for a hardcopy.
-Plot generates a plot of internal readings vs. time in seconds. It effectively turns the
transmitter-PC combination into a printing digital oscilloscope.
-Graph generates a histogram, where the horizontal axis is the internal reading, and the
vertical axis is the number of occurrences of readings. The display continually resizes itself
as the number of readings increases.
Plot

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Graph
•The Jumpers pull-down menu shows jumper positions for the selected signal conditioner
boards and the main board, duplicating information in this manual.

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10. OPENING YOUR TRANSMITTER CASE
WHEN TO CHANGE JUMPERS
Your transmitter case does not need to be opened if jumpers have already been set by your
distributor. Otherwise you will need to open the case and either set jumpers or verify that the
factory default jumpers positions will meet your needs. Note that while Instrument Setup
Software senses the circuit board type, it does not sense jumper settings, and the correspond-
ing information has to be entered manually. Jumpers are used for the following:
1) On the signal conditioner board to set the signal type (e.g., voltage or current) and the
range. For details, please see the next five sections of this manual. Note that all ranges of
all signal conditioner boards are factory calibrated, with calibration factors stored in
EPROM on the board.
2) On the main board to set the analog output signal (current or voltage) and sensor excita-
tion output (5V, 10V or 24V). Default factory settings are current analog output and 10V
excitation.
HOW TO OPEN & CLOSE THE CASE
The two clamshell halves of the case are held together with a bolt and a nut at each of the four
corners. Use a Phillips screwdriver to remove the four bolts. The nut will then drop off, and the
clamshell halves will separate. When closing the case, make sure that the ventilation grills are
properly aligned.
Caution: The nuts at each corner are not captive and are black. Take precautions
so that the nuts do not get lost.

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11. DC SIGNAL CONDITIONER BOARD
The DC volts, DC amps and process transmitters utilize the DC signal conditioner board, which
needs to be configured via jumpers for the desired voltage or current range. All signal ranges
are factory calibrated with calibration factors stored in EEPROM on the signal conditioner
board. Instrument Setup Software recognizes the board and brings up the appropriate menu
items for it; however, it does not recognize the jumper settings. The excitation output can be
set to 5V @ 100 mA, 10V @ 120 mA, or 24V @ 50 mA via main board jumper settings. Please
see Section 14 of this manual.
Board Revisions Q and R
1. Use 5 mm (0.2") jumpers for locations E1 designated by a capital letter.
2. Use 2.5 mm (0.1") jumpers for locations E2 and E3 designated by a lower case letter.
3. Store spare jumpers on an unused jumper post not associated with a capital letter.
For process & DC ratio, three scaling methods can be selected in Instrument Setup Software:
1) Scale and offset, 2) Coordinates of 2 points, and 3) Reading coordinates of 2 points, which
uses actual signals. Only menu items applicable to the selected method are presented. Full-
scale ranges are ±20000 counts. For resolution purposes, the 300V and 600V ranges are
2000V (100 mV/count), and the 5A range is 20A (1 mA/count).
For use with load cells, select 5V or 10V excitation, set Mode to Ratio, and set Range to 0.2V.
The transmitter will then use the excitation voltage as the reference for A-to-D conversion,
thereby correcting for any variations in excitation voltage. The excitation can drive four 350-
ohm load cells in parallel.
Voltage Ranges Jumpers
h
g
fc
e d
b
a
b
a
E1 B
A
E3 E2
FS Input
E1
E2
E3
±200.00 mV
±2.0000 V
±20.000 V
±200.00 V
±300.0V (ETL)
±600.0V (not ETL)
A
A
B
B
B
B
f
f
h
h
g
g
b
a
b
a
a
a
Current Ranges Jumpers
FS Input
E1
E2
E3
±2.0000 mA
±20.000 mA
±200.00 mA
±5.000 A
A
A
A
A
e & g
d & g
c & g
a, b & g
b
b
b
b