Laurel-electronics LTNET485 DIN Rail Mounted Ethernet-to-Serial Devic 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.

LTNET485 DIN Rail Mounted

Ethernet-to-Serial Device Server

Connects up to 31 meters & transmitters to the Ethernet via an RS485 bus

Features

• Interfaces to the Ethernet via an RJ45 jack.

• Mounts to 35 mm DIN rail.

• Universal AC power, 85-264 Vac

• Optional low voltage power, 10-48 Vdc or 12-32 Vac

• Priced at only $150

• DHCP server capability assigns a local IP address to the server

and computer if necessary.

Description

Network with an LTNET485 Ethernet-to-RS485 Device Server

The LTNET485 DIN Rail Ethernet-to-Serial Device Server

provides a 10/100BaseT interface to the Ethernet and serves as

an Ethernet-to-RS485 converter and device server for a mix of up

to 31 Laurel meters and transmitters on an RS485 bus. The

Ethernet connection is via a standard RJ45 jack. The connection

to the RS485 bus can be via an RJ11 jack or via discrete screw

terminals. The lines of the RJ11 jack and the screw terminals are

wired in parallel.

Priced at only $150, the LTNET485 is a very economical and

easy means to interface different types of Laurel transmitters to

an Ethernet LAN and to the Internet. The transmitters can be any

mix of analog input types (voltage, current, AC, DC, strain gauge,

load cell, thermocouple, RTD, ohms) and pulse input types

(frequency, rate, totalizing, quadrature position or rate, period,

elapsed time, sum, difference or ratio of two inputs).

Laurel transmitters come with RS485 I/O as a standard feature

and can be connected to the LTNET485 Device Server using

screws terminals and 3 discrete parallel wires (half-duplex

RS485) or 5 discrete parallel wires (full-duplex RS485), with no

need for a hub. This includes LTA transmitters and LTM

transmitters.

Laurel meters to be connected to the LTNET485 Device Server

need to be equipped with an RS485 option board with dual RJ11

jacks (digital interface ordering option 2). Multiple meters can

then be daisy-chained using readily-available commercial 6-wire

straight-through data cables (not crossover cables), with no need

for a hub.

As an alternative, multiple Laurel meters can be interfaced to a

single Ethernet line via an Ethernet-to-RS485 Converter Board in

one of the meters. That board offers an RJ11 jack for connection

to the RS485 bus as required for meters (like the LTNET485), but

not screw terminal connectors as required for Laurel transmitters

(unlike the LTNET485). Individual Laurel meters equipped with

an Ethernet interface board can also be interfaced to a single

Ethernet line.

Discovery and configuration of Ethernet nodes and their

connected devices can be achieved by two alternate methods

using a PC connected to the same LAN as the Nodes: 1) a

Console mode which uses Windows-based Node Manager

Software, and 2) a Webserver mode which uses a browser to

access the public or private IP address of the node.

1 2

LTNET485 DIN Rail Mounted 1

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

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

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