Laurel Electronics Ethernet Interface Board User Manual

Description

LAUREL

ELECTRONICS, INC.

Ethernet Interface Board for 1/8 DIN Laureate

Meters, Counters, Timers & Remote Displays

Features

•

Connects all 1/8 DIN Laureate DPMs, counters, timers & remote displays to a
LAN via a standard Ethernet cable.

•

Easily networked using Node Manager Software or Node resident web server
software for discovery and setup.

•

Meters on an RS485 bus connected to the Internet via an Ethernet-to-RS485 device server board.

Selectable baud rates to 19,200.

•

Powered by instrument.

•

Isolated from meter and power grounds.

The basic Laureate Ethernet interface board plugs into a host

1/8 DIN digital panel meter, counter, timer or emote display to
provide a 10/100Base-T Ethernet interface via an industry­standard RJ45 connector. Multiple meters, each with its own
Ethernet cable, can be connected to a local area network (LAN)
or to the Internet via a router, or directly to a host computer. LAN,
WAN, and Internet connectivity are fully supported so that the
meter can be read and set up remotely.

Node Manager software is shipped on a mini CD with each
Ethernet board. This free Windows-based application automatic­ally discovers all Laurel Nodes (or Laurel Ethernet boards) on a
LAN or WAN, plus the host meter connected to the Node. Node
Manager software is also used to configure each Node, such as
naming the Node and associated devices, entering email addres­ses for alarm notification and data requests, selecting the Node's
time zone for time-stamping of streaming data, and setting com­munication parameters for associated meters. Please see our
Ethernet Manual.

On a Wide Area Network (WAN), such as the Internet, the host
computer is outside of the LAN and must know the public IP
address of the LAN router to discover the Laurel Nodes.

Web server software is built into each Node and can be used to
discover and configure all Laurel Nodes over the Internet.

Built-in DHCP server capability allows Laurel Nodes to con­stitute themselves into a network and be connected directly to
a host computer when no router or dedicated DHCP server is
present, as illustrated below. When a Node fails to find a DHCP
server that responds to its request for a private IP address, it
assigns one. When several Nodes fail to receive a Private IP
address, they mutually agree to make one of the Nodes a
temporary DHCP server that assigns a Private IP address to
each device on the network.

Data can be sent by Laurel Nodes in the form of real-time
stream data upon request or in the form of emails. Emails can
be sent in response to email requests from the host computer,
periodically, or when devices encounter an alarm condition or go
off-line.

Laurel's separate Ethernet-to RS458 server board can be
used as an alternative to Ethernet board for connecting to the
Ethernet up to 31 Laurel Instruments on an RS485 bus.

Easy connection of an RS485 bus with Laureate meters to a PC via an Ethernet cable.

LAUREL

ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel [phone] • www.laurels.com 1

No need for a separate router or dedicated DHCP server.

Electrical Specifications

Ethernet Board Specifications

Data rates

Devices per Node
Ethernet connector
Ethernet cable
Ethernet compliance
Isolation
ESD Protection
EMI Immunity
EFT Protection
Short Circuit Protection

300, 600, 1200, 2400, 4800, 9600, 19200 baud with Laureate instruments.
Up to 614,400 baud with non-Laureate instruments.
Host digital panel meter, counter, timer or remote display
RJ45 jack
10/100Base-T
EIA/TIA-485
250V rms working, 2.3 kV rms per 1 min test
15 kV per IEC 1000-4-2
10 V/m per IEC 1000-4-3
2 kV per IEC 1000-4-4
Continuous

Protocol Specifications

(Protocol is implemented by meter main board)

Modbus RTU

Standards Compliance
Data Formats (selectable)

Applicable Interface Boards
Conversion to Modbus TCP
Main Board Revision Level

Modbus ASCII

Standards Compliance
Data Formats (selectable)

Applicable Interface Boards
Conversion to Modbus TCP Main
Board Revision Level

Modbus over Serial Line Specification V1.0 (2002)

1. No parity, 8 data bits, 2 stop bits

2. Odd parity, 8 data bits, 1 stop bit

3. Even parity, 8 data bits, 1 stop bit
Ethernet, USB, RS232, RS485, RS485 Modbus
Automatic
Level 5 or above

Modbus over Serial Line Specification V1.0 (2002)

1. No parity, 7 data bits, 2 stop bits

2. Odd parity, 7 data bits, 1 stop bit

3. Even parity, 7 data bits, 1 stop bit
Ethernet, USB, RS232, RS485, Modbus RS485
Automatic
Level 5 or above

Laurel ASCII

Data Format
Protocol
Applicable Interface Boards
Main Board Revision Level

LAUREL

No parity, 8 data bits, 1 stop bit
Laurel Laurel ASCII
Ethernet, USB, RS232, RS485, RS485 Modbus
Any

ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel [phone] • www.laurels.com 2