LAUREL LTSE User manual

Model LTSE
ANALOG OUTPUT FROM
MODBUS TCP/IP COMMANDS
OWNERS MANUAL
LAUREL Electronics Inc.
3183-G Airway Ave, Costa Mesa, CA, 92626, USA
el: [phone] Fax: [phone] • Website: www.laurels.com

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1. ORDERING GUIDE, SERIAL INPUT TRANSMITTER
Configure a model number in this format: LTSE60
LTSE6
… Transmitter with Ethernet serial data input, 4-20 mA, 0-20 mA or 0-10 isolated
analog output, and dual 120 mA solid state relays.
Power
0
00
0....................................................................................................... 85-264 ac or 90-300 dc
1
11
1........................................................................................................... 12-30 ac or 10-48 dc
2. TABLE OF CONTENTS
1. ORDERING GUIDE, LTSE SERIAL INPUT TRANSMITTER ................................................. 2
2. TABLE OF CONTENTS ....................................................................................................... 2
3. INTRODUCTION, LTSE ETHERNET INPUT TRANSMITTER ............................................... 3
4. COMPLEMENTARY MANUALS ......................................................................................... 3
5. RECEI ING & UNPACKING YOUR LTSE TRANSMITTER .................................................. 3
6. SAFETY CONSIDERATIONS .............................................................................................. 4
7. LTSE TRANSMITTER FIELD WIRING & JUMPER SETTINGS ............................................ 5
8. SETTING UP YOUR TRANSMITTER WITH IS SOFTWARE ................................................ 6
9. MODBUS COMMANDS FOR LTSE TRANSMITTER............................................................ 13
10. USING DIAGNOSTIC TOOL QMODMASTER ...................................................................... 14
11.
11.11.
11. LTSE TROUBLESHOOTING HINTS .................................................................................... 18
12. SPECIFICATIONS, SERIAL INPUT TRANSMITTER ............................................................ 20
13. WARRANTY ...................................................................................................................... 24

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3. INTRODUCTION, LTSE ETHERNET INPUT TRANSMITTER
The LTSE Ethernet input to analog output trans itter (or Ethernet-to-analog converter) accepts
Modbus TCP/IP commands to generate an isolated, scalable 4-20 mA, 0-20 mA or 0-10 analog
output. The LTSE utilizes an Ethernet counter transmitter main board, but no signal conditioner
board. It is factory set to the Modbus TCP protocol. Unlike the LTS serial-to-analog converter, it
does not work with the Custom ASCII protocol, which supports data streaming. Model LTSE60
is normally powered by AC (85-264 ac). Model LTSE61 is powered by low voltage AC or DC
(typically 24 dc).
The analog output can be set by jumpers to current (4-20 mA or 0-20 mA) or voltage output (0-
10 ). The analog output is transformer isolated to avoid ground loops, provides 16-bit reso-
lution of the output span, and is ultra-linear to within one bit. The output is scaled to the serial
input in software. Output accuracy is ±0.02% of span. The factory default setting is 4-20 mA.
Dual solid state relays rated 120 mA at 140 ac or 180 dc are standard. The relays can
respond to the transmitted serial values or to transmitted control characters, which override the
internal setpoints. The relays can also be controlled independently of the serial input by applying
signals to control inputs 1 and 2.
Isolation to 250V r s is provided for power, the Ethernet input, analog output, and relay
outputs. Isolation adds safety and avoids ground loops.
Trans itter setup is via the unit’s Ethernet port using an external PC and our Instrument Setup
(IS) software, which is at no charge.
4. COMPLEMENTAR MANUALS
• Modbus Manual for Counters at https://www.laurels.com/downloadfiles/Modbus-Manual-
CTR.pdf.
• Ethernet Manual at https://www.laurels.com/downloadfiles/ethernet_manual.pdf. Covers
Ethernet Node discovery and setup using Node Manager PC software or Web Server soft-
ware built into each Node. Node Manager software can set up the sending of emails or text
messages either periodically or in the event of an alarm.
5. RECEIVING & UNPACKING OUR TRANSMITTER
Your LTSE transmitter was carefully tested and inspected prior to shipment. Should the trans-
mitter 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.

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6. SAFET 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. isually inspect the unit for signs of damage. If the
unit is damaged, do not attempt to operate.
Caution:
• This unit may be powered with AC (mains) from 85-264 ac or 90-300 dc with the high
voltage power supply option, or from 12-30 ac or 10-48 dc with the low voltage power
supply option. This transmitter has no AC (mains) switch. It will be in operation as soon as
power is applied.
• The 85-264 ac or 90-300 dc mains connector (P1 Pins 1-3) is colored green to differentiate
it from other input and output connectors. The 12-30 ac or 10-48 dc mains connector is
colored black.
• To avoid dangers of electrocution and/or short circuit, do not attempt to open the case while
the unit is under power. However, signal wiring changes external to the case can be made
safely while the unit is under power.
• To prevent 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. Such an environ-
ment constitutes an explosion hazard.
• Secure the transmitter to a 35 mm DIN rail.
Sy bols used:
Caution (refer to accompanying
documents)
Caution, risk of electric shock.
Equipment protected throughout
by double insulation or reinforced
insulation.
Earth (ground) terminal.
Both direct and alternating current.
Operating environ ent:
• Class II (double insulated) equipment
designed for use in Pollution degree 2.
PROVISION FO
PROVISION FOPROVISION FO
PROVISION FOR
RR
R COOLING
COOLINGCOOLING
COOLING
AL 1
AL 2
RESET
POWER
AL 1
AL 2
RESET
POWER
AL 1
AL 2
RESET
POWER
AL 1
AL 2
RESET
POWER
AL 1
AL 2
RESET
POWER
To avoid overheating, mount transmitters
with ventilation holes at top and bottom.
Leave a minimum of 6 mm (1/4”) between
transmitters, or force air with a fan.

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7. LTSE TRANSMITTER FIELD WIRING & JUMPER SETTINGS
E2 ju pers a + d set the analog output to 4-20 mA or 0-20 mA current (factory default setting).
E2 ju pers b + c set the analog output to 0-10 voltage.
The analog output is sourcing. Do not put an external voltage source in series with
it. Applying an external 24 dc source will burn out the analog output board.
Do not change E1, E3, E4, E6 or E7 ju pers.
HOW TO OPEN & CLOSE THE CASE
The only reason to open the case would be to change the factory default 4-20 mA or 0-20 mA
analog output to 0-10 . To open the case, remove the four screws at the LTSE corners. When
closing the case, make sure that the ventilation grills are properly aligned.

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8. SETTING UP OUR LTSE TRANSMITTER WITH IS SOFTWARE
OVERVIEW
The analog output and relay output functions of an LTSE transmitter are set up initially with
Laurel’s free Instrument Setup (IS) software, a Windows-based application that runs on a PC.
For setup, the LTSE can be connected to the PC via a direct Ethernet connection, or the LTSE
can be plugged into the same LAN as the PC. The IS software running on the PC will discover
the LTSE’s Ethernet Node (or Ethernet chip) and the host Device (or the LTSE transmitter
proper) that houses the Node.
To set up the analog output, jumpers on the LTSE main board are used to select current output
(4-20 mA or 0-20 mA) or voltage output (0-10 ). Current output is the factory default. To scale
the analog output, the values for the high and low endpoints of the range are entered using IS
software. A variable called “Item 3” is entered via a Modbus command and is compared to the
two endpoints to generate the analog output by linear interpolation.
To set up relay operation, relay setpoints and relay operation modes are programmed into the
LTSE using IS software. For relay operation, the same “Item 3” variable that is used for the
analog output is compared to the setpoints. The relays can also be actuated directly via Modbus
commands, as explained in this manual.
Following initial setup, the endpoints used to generate the analog output and the parameters
used to control relay operation can be changed on the fly using Modbus commands shown in
our Modbus Manual for Counters at https://www.laurels.com/downloadfiles/Modbus-Manual-
CTR.pdf.
INSTALLING INSTRUMENT SETUP (IS) SOFTWARE
Under Windows 7 or 10, set User Account Control (UAC) to “Never Notify” so that IS software
can write files. Use Google for instruction on how to change UAC for your version of Windows.
Turn off and restart your computer. Download IS3_5_4.exe onto your PC from our website.
Double-click on the downloaded file to unzip it into a directory, like C:\temp. Within that
directory, double-click on setup.exe to install the software on your PC. IS software works with
all versions of Windows. If you cannot complete the installation, this may be because of
software firewalls at your company. Please see the troubleshooting section at the back of this
manual. Your executable file will be C:\Program Files(x86)\IS2\Instrument Setup.exe. Copy that
file and paste a shortcut on your Desktop.
ESTABLISHING ETHERNET COMMUNICATIONS
Connect the PC to the LTSE directly via an Ethernet cable, or connect the PC and LTSE via
Ethernet cables into the same Local Area Network. Ethernet cables (CAT5 or better) can be
straight-through or crossover. Our Ethernet Nodes automatically adapt for either. Apply power
to the LTSE, and click on the IS shortcut that you have created in the previous step.

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Following a brief splash screen, IS software will open the Communications screen. Make
selections as shown below, and click on Ethernet .
In the resulting Node Discovery screen, all Laurel Nodes discovered by your PC will be listed.
Highlight the Node that corresponds to your LTSE.

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After highlighting the Node corresponding to your LTSE, click on the Device Discovery tab. Only
the LTSE host of your Node should be listed. Highlight that Device, and press Main Menu .
From the Main Menu screen, press on Counter and on Get to upload the setup program from
your LTSE into your PC. Press on iew then Setup to view the setup parameters of your LTSE.
Available Main Menu tabs will then be displayed. The first tab is Input+Display . Clicking on
Read will allow you to view the latest reading transmitted via Modbus.

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Click on the
Click on the Click on the
Click on the A
AA
Analog Out
nalog Outnalog Out
nalog Out tab
tabtab
tab to scale your analog output. The factory default output is 4-20 mA,
which is set by jumpers as explained previously in this manual. Enter the Lo Range Reading
that is to produce the low analog out, such as 4 mA, and the Hi Range Reading that is to pro-
duce the high analog output, such as 20 mA. This will create the two endpoint values of your
analog output range. Only enter numerical values. The decimal point is ignored.
The analog o
utput is sourcing.
Do not put an external voltage source in series with
it. Applying an external 24 dc source as would be required for a 2-wire transmitter
will burn out the LTSE’s analog output circuit.

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Click on the Relay Alarms tab to set up the LTSE’s two solid state relays, which are standard.
The two relays can operate in a basic alarm mode, in a hysteresis band mode, or in a deviation
band mode, as explained below. Setpoint operation is referenced to the digital reading that is
received as serial data. For example, temperature alarm or control would be referenced to a
setpoint in °C or °F.
ime
1000
Digital Reading
Setpoint
OFF OFF
ON
ime
1000 Setpoint OFF
ONON
Digital Reading
Active High Basic Alarm Active Low Basic Alarm
A basic alar changes state automatically when the reading rises above a specified limit, and
changes back automatically when the reading falls below that limit. A red LED indicates the
relay is in an alarm condition, which can be active high or active low, as programmed.