Laurel-electronics LTE: Ethernet & 4-20 mA Transmitter for Load C Uživatelský manuál stáhnout pdf

LAUREL

ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 1

LAUREL

ELECTRONICS, INC.

Ethernet & 4-20 mA Transmitter

for Load Cell & Microvolt Signals

Features

• Ethernet Serial Data I/O, Modbus TCP or Laurel ASCII protocol

• 4-20 mA or 0-10V transmitter output, 16 bits, jumper selectable, isolated

• Dual 120 mA solid state relays for alarm or control, isolated

• 10V excitation supply for up to four 350-ohm load cells in parallel

• 20, 50, 100, 250 and 500 mV full-scale input ranges

• 4 or 6-wire hookup to avoid power supply and lead resistance effects

• Digital span adjust from 0 to ±99,999, zero adjust from -99,999 to +99,999

• Analog output resolution 0.0015% of span (16 bits), accuracy ±0.02% of span

• Universal 85-264 Vac / 90-300 Vdc or 10-48 Vdc / 12-32 Vac power

• Power over Ethernet (PoE) jumper selectable with 10-48 Vdc supply

• Custom curve linearization and rate from successive readings (optional)

Description

The Laureate load cell or microvolt input transmitter is

designed for use with load cells, strain gauges and microvolt

input signals where exceptional sensitivity and stability are

required. A most sensitive full-scale input range ±20 mV can be

scaled internally to ±99,999 counts. The selected input range for

the full 0-20 mA output span can be as wide as ±99,999 counts

or as narrow as 150 counts, limited only by considerations of

electrical noise and time constants of the programmable moving

average digital filter.

A built-in, isolated, 10V, 120 mA excitation supply can power

up to four 350-ohm load cells in parallel. Load cell connection

can be via 4 or 6 wires. With 4-wire load connection, the

transmitter operates in a ratiometric mode to eliminate errors due

to power supply variations. With 6-wire load connection, it also

compensates for lead resistance, allowing long cable runs.

Fast read rate at up to 50 or 60 conversions per second while

integrating the signal over a full power line cycle is provided by

Concurrent Slope (Pat 5,262,780) analog-to-digital conversion.

High read rate is ideal for peak or valley capture and for real-time

computer interface and control.

Digital signal filtering modes are selectable for 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 for an update every 1/4 sec.

•

An adaptive moving average filter selection provides a

choice of 8 time constants from 80 ms to 9.6 s. 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.

Standard features of Laureate LTE transmitters include:

•

Ethernet I/O, isolated. Supported protocols are Modbus

RTU and ASCII (tunneled via Modbus TCP) and Laurel ASCII.

The latter is simpler than the Modbus protocol and is recom-

mended when all devices are Laureates. Note that RS232 or

RS485 data I/O in lieu of Ethernet is provided by our 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.

•

Universal 85-264 Vac power. Low-voltage 10-48 Vdc or

12-32 Vac power is optional.

Discovery and configuration of Laureate Ethernet Nodes is

easily achieved with Laurel's Node Manager Software, and the

discovered transmitters can then be programmed using Laurel's

Instrument Setup Software. Both softwares run on a PC under

MS Windows and can be downloaded at no charge.

1 2 3 4

Shrnutí obsahu

Strany 1

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 1 LAUREL ELECTRONICS, I

Strany 2 - Specifications

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 2 Specifications Analog

Strany 3 - Mechanical

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 3 Environmental Operatin

Strany 4 - Ordering Guide

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 4 Load Cell Transmitter

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Laurel-electronics LTE: Ethernet & 4-20 mA Transmitter for Load C Uživatelský manuál

Procházejte online nebo si stáhněte Uživatelský manuál pro Hardware Laurel-electronics LTE: Ethernet & 4-20 mA Transmitter for Load C. Laurel Electronics LTE: Ethernet & 4-20 mA Transmitter for Load Cell & Microvolt Signals User Manual Uživatelská příručka

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