Laurel Electronics LTE 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

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 applic­able to temperature.

Power

0..............................85-264 Vac

1.......... 12-32 Vac or 10-48 Vdc

2................Power over Ethernet

Input Type

DC Volts

DCV1..................... ..200.00 mV

DCV2...........................2.0000 V

DCV3...........................20.000 V

DCV4...........................200.00 V

DCV5.............................600.0 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

RMS Amperes

RMA1 ...................... 2.0000 mA

RMA2 ...................... 20.000 mA

RMA3 ...................... 200.00 mA

RMA4 ........................... 5.000 A

Process 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.

Strain Gauge, Potentiometer

4-wire ratio. Full scale ranges
from 200 mV to 20V.

SG ....... 0-200 mV in = 4-20 mA

SG1 ..................Custom Scaling

Specify min input & min output,
max input & max output.

Load Cells

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

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....................................... 6

8. PROGRAMMING YOUR TRANSMITTER............................................................................ 10

9. OPENING YOUR TRANSMITTER CASE ............................................................................. 19

10. DC SIGNAL CONDITIONER BOARD JUMPER SETTINGS .................................................. 20

11. AC SIGNAL CONDITIONER BOARD JUMPER SETTINGS ................................................. 21

12. LOAD CELL SIGNAL CONDITIONER BOARD JUMPER SETTINGS .................................... 18

13. THERMOCOUPLE SIGNAL CONDITIONER BOARD JUMPER SETTINGS .......................... 22

14. RTD & OHMS SIGNAL CONDITIONER BOARD JUMPER SETTINGS................................. 23

15. DUAL RELAY OPERATION ............................................................................................... 24

16. INPUT SIGNAL FILTERING................................................................................................ 25

17. TRANSMITTER CALIBRATION .......................................................................................... 25

18. CUSTOM CURVE LINEARIZATION .................................................................................... 24

19. MODBUS PROTOCOL TRANSMITTER COMMUNICATIONS OVERVIEW ........................... 26

20. CUSTOM ASCII PROTOCOL TRANSMITTER COMMUNICATIONS OVERVIEW ................. 31

21. SPECIFICATIONS, LTE SERIES ANALOG INPUT TRANSMITTER ...................................... 36

22. WARRANTY ...................................................................................................................... 40

- 3 -

3. COMPLEMENTARY MANUALS

This manual covers LTE Series DIN rail transmitters

dual relays, and an analog input signal conditioner.

It covers hardware aspects such a pinout and on­board 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.

with isolated Ethernet and 4-20 mA outputs,

- 4 -

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 kΩ resistance.

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.

Power over Ethernet (PoE) operation is jumper selectable with the DC power option (10-48 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.

- 5 -

5. RECEIVING & UNPACKING YOUR TRANSMITTER

4006497

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)

Caution, risk of electric shock.

Equipment protected throughout by double
insulation or reinforced insulation.
CE Mark. Indicates that the product meets
EU safety, health and environmental requi­rements.

Earth (ground) terminal.

Both direct and alternating current.

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.

Operating environment:

Transmitter Class II (double insulated) equipment designed for use in Pollution degree 2.

- 6 -

7. LTE TRANSMITTER MAIN BOARD JUMPERS & FIELD WIRING

AC neut or -DC

P4 Analog
output (standard)

P3 Solid state
relays (normally
open, standard)

Ana out - 1

Ana out + 2

Alarm 2 1
Alarm 2 2
Aalrm 1 3
Alarm 1 4

E1

P5 Signal

input &
excitation
output

E2

ad

c

b

E3

c
b
a

E4

b

Signal

conditioner

board

RJ45

b

a

Ethernet

a

E7

3 Earth GND
2
1 AC high or +DC

P1 Power input

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).

• Power over Ethernet (PoE). Only available for main boards with the 10-48 Vdc power option.

Jumpers are preset if PoE is specified at the time of purchase.

• 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.

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 and power up the transmitter.

Analog Output Jumpers

Current (0-20 mA) E2 a + d

Voltage (0-10V) E2 b + c

Power over Ethernet Jumpers

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

Enabled E7 a + b

- 7 -

Comm. Reset Jumper

Jumper + power-up E1

P6 - SIGNAL INPUT DETAIL

DC & Externally Powered Process

Excitation return 1

+ Excitation 2

- Signal input 3

+ Signal input 4

2-Wire Process Transmitter

Excitation return 1

+ Excitation 2

- Signal input 3

+ Signal input 4

Strain Gauge

Excitation return 1

+ Excitation 2

- Signal input 3

+ Signal input 4

-DC
+DC

+

-

Load Cell

Excitation return 1

- Sense 2

- Signal 3

+ Signal 4

+ Excitation 5

+ Sense 6

For 4-wire load cell connection, jumper
Pin1 to Pin 2, and Pin 5 to Pin 6.

RTD or Resistance - 2 Wire

Excitation return 1

+ Excitation 2

- Signal input 3

+ Signal input 4

RTD or Resistance - 3 Wire

AC & AC+DC True RMS

Signal High 1

NC 2

Signal Low 3

Signal High 4

2, 20, 200, 600V

AC neutral

0.2V, current

Thermocouple

NC 1
NC 2

- Signal input 3

+ Signal input 4

P4 - ANALOG OUTPUT DETAIL

Driving a Load with 4-20 mA

Analog return 1

4-20 mA output 2

500 Ohms max

Driving a Load with 0-10V

Excitation return 1

+ Excitation 2

- Signal input 3

+ Signal input 4

RTD or Resistance - 4 Wire

Excitation return 1

+ Excitation 2

- Signal input 3

+ Signal input 4

MOUNTING 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

AL 1

AL 2

RESET

POWER

AL 1

AL 2

RESET

POWER

Analog GND 1

0-10V output 2

5 kOhms min

Mount transmitters with ventilation holes at top
and bottom. Leave minimum of 6 mm (1/4")
between transmitters, or force air with a fan.

- 8 -

The Ethernet connector for all of our Ethernet Nodes is provided by an RJ45 jack, Green and

Ethernet Indicators

Amber LED

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

RX -

RX +
TX ­TX +

8
7
6
5
4
3
2
1

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.

- 9 -

8. PROGRAMMING YOUR TRANSMITTER

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

Download the file

Install Instrument Setup Software

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

or on the desktop icon that you may have created. Following a brief splash screen, the

Setup
Communications Setup

ISx_x_x.exe

screen will appear.

from our website and double-click on the file name. Click on

and follow the prompts.

Start => Programs => IS2 => Instrument

In the Communications Setup screen, select
the Communication Type, any of the protocols listed.

Transmitter LTE

- 10 -

as the Device Type,

Ethernet

as

Upon clicking on
Alert shown below. Click on

Keep Blocking

need to restore Windows Firewall defaults by clicking on

Advanced

=>

Ethernet

, IS software will not be able to establish Ethernet communications. You will then

Restore Defaults

for the first time, you may be presented with the Windows Security

Unblock

.

, and IS software will be launched. If you ever click on

Control Panel

=>

Windows Firewall

=>

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.

- 11 -

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
default name is the Node’s unique MAC address. You can also use this tab to change your
Node’s communication settings. 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

Get

to retrieve settings from the Device to the PC. Press

Device.

Get

to retrieve settings from the Node to the PC. Press

Put

to write settings from the PC to the

Tank Farm

Tank Level

. The

. Press

- 12 -