LAUREL LTS User manual

Model LTS
RS232 OR RS485 SERIAL INPUT,
ANALOG OUTPUT TRANSMITTER
Modbus or Custom ASCII Proto ol
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: LTS60, CBL04
LTS
6
…Transmitter with 4-20 mA, 0-20 mA,
0-10V or -10V to +10V isolated analog
out ut, RS232 or RS485 serial data
in ut, and dual 120 mA solid state
relays. Default jum ered for RS232.
LTSE6E… Transmitter with 4-20 mA, 0-20
mA, 0-10V or -10V to +10V isolated
analog out ut, Ethernet serial data
in ut, and dual 120 mA solid state
relays.
Power
0............................. 85-264 Vac or 90-300 Vdc
1................................. 12-30 Vac or 10-
48 Vdc
ACCESSORIES
CBL04……RS232 cable, two 3- in connec-
tors on transmitter end, DB9
connector on com uter end.
CBL02……USB to DB9 ada ter cable. Can
be used with CBL01 or CBL04.

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2. TABLE OF CONTENTS
1. ORDERING GUIDE, SERIAL INPUT TRANSMITTER .......................................................... 2
2. TABLE OF CONTENTS ....................................................................................................... 3
3. INTRODUCTION, SERIAL INPUT TRANSMITTER .............................................................. 4
4. RECEIVING & UNPACKING YOUR TRANSMITTER ........................................................... 5
5. SAFETY CONSIDERATIONS .............................................................................................. 6
6. TRANSMITTER FIELD WIRING ......................................................................................... 7
7. JUMPER SETTINGS .......................................................................................................... 8
8. PROGRAMMING YOUR TRANSMITTER ............................................................................ 10
9. LTS STREAMING DATA INPUT MODE WITH CUSTOM ASCII PROTOCOL ........................ 12
10. LTS COMMAND MODE WITH CUSTOM ASCII PROTOCOL ............................................... 21
11. LTS COMMAND MODE WITH MODBUS RTU PROTOCOL ................................................ 22
12. USING DIAGNOSTIC TOO QMODMASTER ........................................................................ 23
13. SPECIFICATIONS, LTS SERIAL INPUT TRANSMITTER ..................................................... 27
14. WARRANTY ...................................................................................................................... 28

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3. INTRODUCTION, RS232 OR RS485 SERIAL INPUT TRANSMITTER
The LTS seri l input to n log output tr nsmitter (or serial-to-analog converter) acce ts
numeric readings embedded in streaming RS232 or RS485 ASCII serial data, and converts
these to an isolated, scalable 4-20 mA, 0-20 mA, 0-10V or -10V to +10V analog out ut. It also
acce ts Modbus RTU or Custom ASCII rotocol commands to out ut a s ecific current or
voltage. The unit fits on a 35 mm DIN rail and is only 22.5 mm (0.89") thick. Model LTS60 can
be owered by 85-264 Vac AC line voltage. Model LTS61 can be owered by low voltage AC or
DC, like 24 Vdc. All electrical connections are via detachable screw-clam lugs. LTS models
use an LT counter transmitter board, but no signal conditioner board. LT counters with a signal
conditioner board, like model LT60FR, can also be used for serial to analog conversion.
The current or volt ge tr nsmitter output is jum er selectable and is transformer isolated to
avoid ground loo s. Either out ut rovides 16-bit resolution of the out ut s an and is ultra-
linear to within one bit. The out ut is scaled to the serial in ut in software. Rated accuracy is
±0.02% of s an.
Du l solid st te rel ys rated 120 mA at 140 Vac or 180 Vdc are standard. The relays can
res ond to the transmitted serial values or to transmitted control characters, which override the
internal set oints. The relays can also be controlled inde endently of the serial in ut by
a lying signals to control in uts 1 and 2.
Isol tion to 250V rms is rovided for ower, the serial data in ut, analog out ut, and relay
out uts. Isolation adds safety and avoids ossible ground loo s.
Seri l d t input selections are RS232, half-du lex RS485, or full-du lex RS485. Selection is
via jum ers and/or at the connector.
Tr nsmitter setup is via the unit’s serial ort using an external PC and Instrument Setu
software, which can be downloaded from our website at no charge. The required 3-wire
transmitter-to-PC interface RS232 cable (CBL04) is easy to build and is also available for
urchase. Plugging cable CBL04 into a CBL02 RS232-to-USB converter cable allows the LTS
unit to be rogrammed via the USB ort of a PC.
The LTS is not plug nd pl y. The format of the strings being received must be known in
advance, including non- rinting control characters. If you do not know the format of your ASCII
data, contact tech su ort of the manufacturer of the sending device. Or use a terminal
emulator PC rogram, like HyperTermin l, PuTTY, or Re lTerm, to view the received data on
your PC.
The LTSE6 Ethernet input to n log output tr nsmitter acce ts streaming Ethernet data and
converts it to an isolated, scalable 4-20 mA, 0-20 mA, 0-10V or -10V to +10V analog out ut.
That transmitter is covered by a se arate user manual.

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4. RECEIVING & UNPACKING YOUR TRANSMITTER
Your transmitter was carefully tested and ins ected rior to shi ment. Should the transmitter be
damaged in shi ment, notify the freight carrier immediately. In the event the transmitter is not
configured as ordered or is ino erable, return it to the lace of urchase for re air or re lacement.
Please include a detailed descri tion of the roblem.

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5. SAFETY CONSIDERATIONS
W rning: Use of this transmitter in a manner other than s ecified may im air the rotection
of the device and subject the user to a hazard. Visually ins ect the unit for signs of damage. If the
unit is damaged, do not attem t to o erate.
C ution:
• This unit may be owered with AC (mains) from 85-264 Vac or 90-300 Vdc with the high
voltage ower su ly o tion, or 12-30 Vac or 10-48 Vdc with the low voltage ower su ly
o tion. Verify that the ro er ower o tion is installed for the ower to be used. This
transmitter has no AC (mains) switch. It will be in o eration as soon as ower is a lied.
• The 85-264 Vac or 90-300 Vdc mains connector (P1 Pins 1-3) of model LTS60 is colored
green to differentiate it from other in ut and out ut connectors. The 12-30 Vac or 10-48 Vdc
mains connector of model LTS61 is colored bl ck.
• The analog out ut is sourcing. Do not connect the 4-20 mA analog out ut to a load designed
to a ly 24 Vdc to a two-wire transmitter. A lying 24 Vdc will burn out the main board.
• To avoid dangers of electrocution and/or short circuit, do not attem t to o en the case while
the unit is under ower. However, signal wiring changes external to the case can be made
safely while the unit is under ower.
• To revent electrical or fire hazard, do not ex ose the transmitter to excessive moisture.
• Do not o erate the transmitter in the resence of flammable gases or fumes. Such an environ-
ment constitutes an ex losion hazard.
• Secure the transmitter to a 35 mm DIN rail.
Symbols used:
Caution (refer to accom anying
documents)
Caution, risk of electric shock.
Equi ment rotected throughout
by double insulation or reinforced
insulation.
Earth (ground) terminal.
Both direct and alternating current.
Oper ting environment:
• Class II (double insulated) equi ment
designed for use in Pollution degree 2.
PROVISION FOR COOLING
PROVISION FOR COOLINGPROVISION FOR COOLING
PROVISION FOR 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 t

o and bottom.
Leave a minimum of 6 mm 1/4”

) between
transmitters, or force air with a fan.

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6. TRANSMITTER FIELD WIRING

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7. JUMPER SETTINGS
Seri l Sign l
Duplex
Jumpers
Termin tion Resistor*
RS485 Full None E6 a = Transmit
E6 c = Receive
Half E6 b + d** E6 c
RS232 Full None None
* The termination resistor jum er settings should only be selected if the transmitter is the last
device on an RS485 line longer than 200 feet (60 m).
** Or connect external BTX to BRX and ATX to ARX (same effect as internal jum ers).
To reset communic tions to 9600 baud, command mode, Custom ASCII rotocol, and Address 1,
lace a jum er at E1, cycle ower, remove the jum er, and restart the transmitter.
An log Output
J4 Pins
Jumpers
Current, 4-20 mA 1 Lo, 2 Hi E2 a + d
Voltage, 0-10V 1 Lo, 2 Hi E2 b + c
Voltage, -10V to +10V 3 Lo, 2 Hi E2 b + c
Excit
tio
n Ou
tput
Jumpers
5V, 100 mA E3 a + c; E4 a
10V, 120 mA E3 a + c; E4 b
24V, 50 mA E3 b, E4 none
Notes:
Notes:Notes:
Notes: 1.
1.1.
1. Jum ers for 4-20 mA out ut are shaded. Jum er settings are for main board Rev J.
2.
2.2.
2. Attem ting to draw more than rated excitation out ut current will shut down the out ut.
3.
3.3.
3. The n log output is sourcing. Do not a ly an external voltage. A lying an external
voltage of 24 Vdc will burn out the transmitter main board.

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WHEN TO CHANGE JUMPERS
Your transmitter case does not need to be o ened if jum ers have already been set by your
distributor. Otherwise you will need to o en the case and either set jum ers or verify that the
factory default jum ers ositions will meet your needs. Factory default jum er settings are for
RS232 in ut and 4-20 mA out ut.
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 Philli s screwdriver to remove the four bolts. The nut will then dro off, and the
clamshell halves will se arate. When closing the case, make sure that the ventilation grills are
ro erly aligned.
C ution: The nuts at each corner are not ca tive and are black. Take recautions
so that the nuts do not get lost.

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8. PROGRAMMING YOUR TRANSMITTER
OVERVIEW
LTS serial in ut transmitters are rogrammed using a PC with a USB ort and our free Instru-
ment Setu (IS) software, which rovides a gra hical user interface. This software allows
u loading, editing, downloading and saving of setu data. To interface the LTS to the PC, two
cables are lugged into each other: CBL04, a three-wire cable which connects the RS232 ort
of the LTS unit to a DB9 connector, and CBL02, an RS232-to-USB ada ter cable which con-
nects the DB9 connector to the USB ort of the PC. CBL02 incor orates and FTDI chi which is
com atible with all versions of MS Windows.
USING INSTRUMENT SETUP (IS) SOFTWARE
As a first ste , set User Account Control (UAC) of your version of Windows to "Never notify" so
that Instrument Setu Software can create directories. Use Google for instructions. Power
down and restart your com uter for the UAC change to take effect. Download the file
ISx_x_x.exe from our website and double-click on the file name. Click on “Install Instrument
Setu Software” and follow the rom ts. To launch IS software, ress on Start => Programs =>
IS2 => Instrument Setu or on the deskto icon that you may have created. Following a brief
s lash screen, the Communications Setu screen below will a ear.

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In the Communications Setu screen, select Custom ASCII as the Protocol, as this is the
factory default setting. Select “Transmitter LT” as the Device Ty e. Then click on the RS232
button which also serves USB. In the resulting Establish Communications screen, select your
Com Port and 9600 as the Baud Rate. Try different Com orts until one works. You will be able
to change your rotocol and baud rate later under the Communication setu tab. Click on
Establish, and the two fields at the bottom of the screen should turn green. Click on Main
Menu. The com uter will remember your communication settings for the next time that you run
IS software.
From the Main Menu, click on Counter => Get Setu to retrieve (or get) the existing setu data
from your counter-transmitter. Click on View => Setu to bring u screens which allow you to
easily edit the setu file using ull-down menus and other selection tools. You can download
(or ut) your edited file into the transmitter by clicking on Counter => Put Setu . You can save
your setu file to disk by clicking on File => Save Setu and retrieve a reviously saved file from
disk by click on File => O en.
After selecting a screen in ut field, ressing the F1 key will bring u detailed hel information
for that field.
The LTS serial-to-analog converter needs to receive streaming serial data or commands from a
Master. It cannot act as a master and send commands or ASCII characters.

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9. LTS SETUP FOR STREAMING INPUT WITH CUSTOM ASCII PROTOCOL
Set Sign l input to None. Set Time Out to 000.00 Secs if you want the analog out ut to be held
indefinitely in the absence of a new serial in ut, or s ecify another time in seconds. Ignore
Signal In ut, Gate Time, Filter and Power-On Total. Under Displ y, select one of the Remote
o erating modes shown. Please see the screen ca tures below for more information.
Remote A is an addressable in ut mode for u to 31 LTS units. The received ASCII text strings
must be in a format like *#KSDDDDDD.A<CR>
* = Recognition character. Another command recognition character may be chosen to make
the transmitter com atible with an existing system. The transmitter will still res ond to
an asterisk.
# = Device Address Code from 1 to V.
Device # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Address Code 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K M N O P Q R S T U V
K = Command letter. Can be rogrammed using the Custom ASCII rotocol to be H, K or L.
S = O tional sign of value. Use s ace or + for ositive, - for negative.
D = Digits from 0 to 9. There can be 1 to 6 digits.
. = O tional decimal oint. Can be anywhere between or after D
DD
D digits.
A = O tional Alarm Character which overrides internal com arisons. A = no alarms, B = alarm
1 active, C = alarm 2 active, D = alarms 1 & 2 active.

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<CR> = Carriage return character. A <LF>
<LF><LF>
<LF> line feed character may be a ended but is ignored.
Remote S is like Remote A but is not addressable. The absence of addressing makes Remote S
faster than Remote A but limits it to oint-to- oint connections. The received value is stored
where it may be selected for Alarm com arisons. If a Coded Alarm character is included, it
overrides the internal alarm com arisons. The received ASCII text strings must be in a format
like SDDDDDD.A<CR>.
S = O tional sign of value. Use s ace or + for ositive, - for negative.
D = Digits from 0 to 9. There can be 1 to 6 digits.
. = O tional decimal oint. Can be anywhere between or after D
DD
D digits.
A = O tional Alarm Character which overrides internal com arisons. A = no alarms, B = alarm
1 active, C = alarm 2 active, D = alarms 1 & 2 active.
<CR> = Carriage return character. A <LF>
<LF><LF>
<LF> line feed character may be a ended but is ignored.
Remote 1-4 allow multi le value to be extracted from Laureate transmissions. Data sequences
with u to three data values can be generated by Laureate digital anel meters and transmitters
(current reading, Peak, Valley). Data sequences with u to four data values can be generated by
Laureate counters (Items 1, 2, 3, Peak). Please refer to our DPM and counter manuals.
• Remote 1 = 1st value of value sequence SDDDD.DDSDDDD.DDSDDDD.DDSDDDD.DD<CR>
• Remote 2 = 2nd value of value sequence SDDDD.DDSDDDD.DDSDDDD.DDSDDDD.DD<CR>
• Remote 3 = 3rd value of value sequence SDDDD.DDSDDDD.DDSDDDD.DDSDDDD.DD<CR>
• Remote 4 = 4th value of value sequence SDDDD.DDSDDDD.DDSDDDD.DDSDDDD.DD<CR>
Remote C is used to extract data from ASCII strings that contains numeric data values
surrounded by ASCII characters that may be rinting or non- rinting. It can accommodate
selected Start and Sto characters. Any number of characters after the start character can be
masked off u to the beginning of the desired data. From 1 to 6 numeric characters can be
selected for the data, or u to 8 characters if a sign and decimal oint are included. The
received ASCII text strings must be in the format STXXXSDDDDDD.SP
ST = Start character. This can be any ASCII character in the received string. It must be at a
fixed number of characters from the beginning of the desired data, which must have a
fixed number of characters. Enter 00 if no start character is available. The sto charac-
ter then becomes the start character.
XXX = Data to be ignored (Ski No.). Number of characters following the Start character to be
ignored.
S = O tional sign of value. Use s ace or + for ositive, - for negative.
D = Digits from 0 to 9. There can be 1 to 6 digits.
. = O tional decimal oint. Can be anywhere between or after D
DD
D digits.
SP = Sto character. Set to 00 if no sto character is available. Note: Only either the start or
sto character can be set to 00. The start and sto characters cannot be any character
included in the data string.

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Note: The LTS is not lug and lay. The format of the strings being received must be known
in advance, including non- rinting control characters. If you do not know the string
format, contact tech su ort of the sending device's manufacturer, or use a terminal
emulator rogram like Hy erTerminal, PuTTY or RealTerm to view the actual trans-
mitted characters.
Warning:
Warning:Warning:
Warning: Do not execute a Main Menu > Counter > Get Setu command to
check setu information if you have laced the transmitter into the Remote
C mode, since that will reset the transmitter to Remote A. In that case, you
will need to reset the LTS to Remote C with Instrument Setu software and
do a Put Setu to re-download your setu file into the LTS. Then discon-
nect your PC.
The Control Inputs pull-down menu controls the effect of grounding Control In ut 1, Control
In ut 2, or both. Selections a licable to the serial in ut transmitter are the following:
• Meter Reset, Function Reset, Meter Reset (first row). When this row is selected,
grounding Control In ut 2 causes a function reset, which resets latched alarms.
• Activ te Al rm 1, Activ te Al rm 2, Activ te Al rm 1&2. When this row is selected,
grounding Control In ut 1 activates relay 1, grounding Control In ut 2 activates relay 2, and
grounding both in uts activates Alarms 1 & 2.
• T re En ble, T re if En bled, T re (last row). When this row is selected, grounding Control
In ut 1 (normally with a ermanent connection) enables the Tare function. Momentarily
grounding Control In ut 2 stores the current digital value as an offset and subtracts this
offset from the digital reading sent to the transmitter, resulting in a zero value for alarms and
the analog out ut. This offset will also be subtracted from all new readings sent to the
transmitter. To change the offset, momentarily ground Control In ut 2 for the new in ut.

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SETTING UP COMMUNICATIONS (REMOTE A & S STREAMING INPUT MODES)
The above screen will a ear under the Communication tab if Remote A or Remote S has been
selected as Dis lay Ty e under the In ut+Dis lay tab. These two modes are not able to extract
data from an ASCII string that contains multi le data values and non-numeric characters.
Under this tab, you can reselect your Baud Rate, Device Address, Serial Protocol, and Full/Half
Du lex, even though you may have selected different values to establish initial communications
with your PC.
Set Out ut Mode to Command. Ignore the setting for CR(LF), Out ut Items, Out ut Filter, and
Out ut Rate, as these items a ly to digital transmission by a counter-transmitter, not to
digital-to-analog conversion by the serial in ut transmitter.

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SETTING UP COMMUNICATIONS (REMOTE C STREAMING INPUT MODE)
The above screen will a ear under the
Communication tab if Remote C has
been selected as Dis lay Ty e under the
In ut+Dis lay tab. This mode is able to
extract data from ASCII strings that
contain multi le data values and non-
numeric characters. Please see the F1
Hel screen to the right.
Under this tab, you can reselect Baud
Rate, Device Address, Serial Protocol,
and Full/Half Du lex, even though you
may have selected different values to es-
tablish initial communications with your PC.
Set Out ut Mode to Command. Ignore CR(LF), Out ut Items, Out ut Filter and Out ut Rate, as
these items a ly to digital transmission by a counter-transmitter, not to digital-to-analog
conversion by the serial in ut transmitter.
The number of characters shown can be u to 7, including 6 digits and a decimal oint. Include
leading zeros, such as 00300.0

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SETTING UP THE ANALOG OUTPUT
Under the Analog Out tab, set Source to Item 3. Under Range, select 0-20 mA, 4-20 mA, 0-10V
or -10V to +10V as your desired analog out ut. Enter your Lo Range Reading and Hi Range
Reading. These will create the two end oint values of your analog out ut range. Only enter the
numerical values. The decimal oint is ignored. The s an between the two values should be at
least 256 counts to minimize the size of analog out ut ste s.

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SETTING UP RELAY ALARMS OPERATION
Du l AC/DC solid st te rel ys rated 120 mA are standard for alarm or set oint control and are
inde endently set u via the “Relay Alarms” tab. Set “Alarm Source” to “Item 3” as illustrated.
For online hel with any data entry field, ress the F1 key.
• Setpoint. The number to which the current reading is com ared if deviation is set to zero. The
reading is the count in engineering units that is transmitted digitally and is also used for analog
out ut. For exam le, if the transmitted reading is in gallons/minute, the set oint will be
referenced to that reading, not to the raw ulse rate sent from a turbine flow meter.
ime
1000
Digital Reading
Setpoint
OFF OFF
ON
ime
1000 Setpoint OFF
ONON
Digital Reading
“Active High” On/Off set oint control
with deviation =0
“Active Low” On/Off set oint control
with deviation = 0

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• Devi tion. A ositive number that can be added or subtracted from the set oint, de ending on
the Deviation Ty e, to determine when an alarm becomes Active or Inactive.
• Al rm Source. De ending on the Signal In ut Mode and Function selected under the In ut+
Dis lay tab, the alarm can be assigned to any of u to three Items, for exam le to Item 1
(A rate / B rate), Item 2 (A rate), or Item 3 (B rate).
• Al rm St te. If “Active High” is selected, the Active Alarm State is defined as being above the
set oint. If “Active Low” is selected, the Active Alarm State is defined as being below the
set oint. If “Disabled” is selected, the Alarm State is always inactive.
• Rel y St te. A setting with ties the Relay State to the Alarm State. If “Active On” is selected,
the relay will be closed when the Alarm State is 1. If “Active Off” is selected, the relay will be
o en when the Alarm State is 1.
• Devi tion Type. Three choices are offered: S lit Hysteresis, S an Hysteresis, and Band
Deviation. These define how Set oint and Deviation are to be combined to set Alarm State.
S an Hysteresis for heater control Band Deviation for com onent testing
In Split Hysteresis, the relay o ens (or closes) when the reading goes above the Set oint lus
one Deviation, and closes (or o ens) when the reading falls below the Set oint less one
Deviation. Two Deviation limits lie symmetrically around the Set oint to create a deviation
band. A narrow hysteresis band is often used to minimize relay chatter. A wide band can be
used for on-off control.
In Sp n Hysteresis, o eration is as for S lit Hysteresis, exce t that the Set oint is always on
the high side, and a single Deviation lies below the Set oint to create the hysteresis band.
S an Hysteresis is considered by some to be more intuitive than S lit Hysteresis.
In B nd Devi tion, the relay o ens (or closes) when the reading falls within the deviation
band, and closes (or o ens) when the reading falls outside. Two deviation limits lie symmetric-
ally around the set oint to create the deviation band. Passbands around a set oint are often
used for go-no-go com onent testing.

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• Al rm Type. Selections are Non-Latching and Latching. Under Non-Latching, the relay is only
closed (or o en) while the Alarm State is Active. Under Latching, the activated relay remains
closed (or o ens) until reset regardless of the Alarm State. Resetting is normally achieved by
tem orarily grounding one of the transmitter’s control in uts, which has been set to Function
Reset under the “In ut+Dis lay” tab.
• Al rms 1,2 No. Rdgs to Al rm. Selections are binary ste s from 1 to 128. This is the number
of consecutive alarm readings that must occur to create an Active alarm. Numbers higher than
2 rovide some Alarm filtering so that 1 or 2 noisy readings do not cause an Active Alarm. The
Alarm becomes Inactive if one of the consecutive readings fails to be an Alarm reading. The
Alarm readings counter then resets to 0.