Lantronix MSS 485 User Manual

NET485

RS422/485 Serial to

Ethernet Adapter

Revision C March 24, 2006

Part Number GC-800-240

Copyright and Trademark

Copyright © 2005, Grid Connect, Inc. All rights reserved.
No part of this manual may be reproduced or transmitted in any form for any purpose other than the

purchaser's personal use, without the express written permission of Grid Connect, Inc. Grid
Connect, Inc. has made every effort to provide complete details about the product in this manual, but
makes no warranty of any kind with regard to this material, including, but not limited to, the implied
warranties of merchantability or fitness for a particular purpose. In no event shall Grid Connect, Inc.
be liable for any incidental, special, indirect, or consequential damages whatsoever included but not
limited to lost profits arising out of errors or omissions in this manual or the information contained
herein.

Grid Connect, Inc. products are not designed, intended, authorized or warranted for use as
components in systems intended for surgical implant into the body, or in other applications intended
to support or sustain life, or in any other application in which the failure of a Grid Connect, Inc.
product could create a situation where personal injury, death, or severe property or environmental
damage may occur. Grid Connect, Inc. reserves the right to discontinue or make changes to its
products at any time without notice.

Grid Connect and the Grid Connect logo, and combinations thereof are registered trademarks of Grid
Connect, Inc. DSTni is a trademark of Lantronix, Inc. All other product names, company names,
logos or other designations mentioned herein are trademarks of their respective owners.

Wi232, NET232, NET485 and NETUSB are trademarks of Grid Connect, Inc. XPort is a trademark
of Lantronix. Ethernet is a trademark of XEROX Corporation. UNIX is a registered trademark of
The Open Group. Windows 95, Windows 98, Windows 2000, Windows NT, and Windows XP are
trademarks of Microsoft Corp. Netscape is a trademark of Netscape Communications Corporation.

Grid Connect

1841 Centre Point Circle, Suite 143
Naperville, IL 60563, USA
Phone: [phone]

Technical Support

Phone: [phone]
Fax: [phone]
On-line: www.gridconnect.com

NET485 User Guide i

Disclaimer and Revisions

Operation of this equipment in a residential area is likely to cause interference in which case the
user, at his or her own expense, will be required to take whatever measures may be required to
correct the interference.

Attention: This product has been designed to comply with the limits for a Class B digital
device pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy, and if not installed and used in
accordance with this guide, may cause harmful interference to radio communications.

Changes or modifications to this device not explicitly approved by Grid Connect will void the user's
authority to operate this device.

The information in this guide may change without notice. The manufacturer assumes no
responsibility for any errors that may appear in this guide.

Date Rev. Author Comments

05/17/05 A GR Preliminary Release
06/23/05 B GR Add notes about Product Info Base, Java RE, .NET
03/24/06 C GR Firmware to 6.1.0.2 and Web Manager update

ii NET485 User Guide

Warranty

Grid Connect warrants each product to be free from defects in material and workmanship for a
period of ONE YEAR after the date of shipment. During this period, if a customer is unable to
resolve a product problem with Grid Connect Technical Support, a Return Material Authorization
(RMA) will be issued. Following receipt of a RMA number, the customer shall return the product to
Grid Connect, freight prepaid. Upon verification of warranty, Grid Connect will -- at its option -­repair or replace the product and return it to the customer freight prepaid. If the product is not under
warranty, the customer may have Grid Connect repair the unit on a fee basis or return it. No services
are handled at the customer's site under this warranty. This warranty is voided if the customer uses
the product in an unauthorized or improper way, or in an environment for which it was not designed.

Grid Connect warrants the media containing software and technical information to be free from
defects and warrants that the software will operate substantially for a period of 60 DAYS after the
date of shipment.

In no event will Grid Connect be responsible to the user in contract, in tort (including negligence),
strict liability or otherwise for any special, indirect, incidental or consequential damage or loss of
equipment, plant or power system, cost of capital, loss of profits or revenues, cost of replacement
power, additional expenses in the use of existing software, hardware, equipment or facilities, or
claims against the user by its employees or customers resulting from the use of the information,
recommendations, descriptions and safety notations supplied by Grid Connect. Grid Connect liability
is limited (at its election) to:

1) refund of buyer's purchase price for such affected products (without interest)

2) repair or replacement of such products, provided that the buyer follows the above procedures.
There are no understandings, agreements, representations or warranties, expressed or implied,

including warranties of merchantability or fitness for a particular purpose, other than those
specifically set out above or by any existing contract between the parties. The contents of this
document shall not become part of or modify any prior or existing agreement, commitment or
relationship.

NET485 User Guide iii

Contents

Table of Contents

1. NET485 Overview............................................................................................................1-1

1.1 Overview.............................................................................................................1-1

1.2 Overview of RS422 / RS485............................................................................... 1-1

1.2.1 The RS485 Enable Signal...................................................................1-2

1.2.2 NET485 Wiring...................................................................................1-2

1.3 RS422 / RS485 Network connections................................................................. 1-4

1.3.1 RS422 Networks.................................................................................1-4

1.3.2 RS485 Networks.................................................................................1-5

2. Introduction......................................................................................................................2-1

2.1 Protocol Support .................................................................................................2-1

2.2 Serial RS422/485 Interface.................................................................................2-2

2.3 Power Supply......................................................................................................2-2

2.4 Ethernet Interface................................................................................................2-3

2.5 Product CD..........................................................................................................2-4

2.6 Additional Documentation..................................................................................2-5

2.7 Technical Specifications ..................................................................................... 2-6

3. Device Installer.................................................................................................................3-1

3.1.1 Microsoft NET Framework.................................................................3-1

3.1.2 Install Device Installer ........................................................................ 3-1

3.1.3 RUN Device Installer..........................................................................3-2

3.1.4 Device Found......................................................................................3-2

3.1.5 Assign IP.............................................................................................3-3

3.1.6 Assignment..........................................................................................3-4

3.2 Using Device Installer ......................................................................................... 3-5

3.2.1 Viewing the Current Configuration ....................................................3-5

3.3 Configuration Using Web Manager....................................................................3-7

3.3.1 Accessing XPort Using Device Installer.............................................3-7

3.4 Network Configuration .......................................................................................3-8

3.4.1 Automatic IP Address Configuration..................................................3-8

3.4.2 Static IP Address Configuration..........................................................3-9

3.4.3 Ethernet Configuration........................................................................3-9

3.5 Server Configuration.........................................................................................3-10

3.6 Host List Configuration.....................................................................................3-11

3.7 Channel 1 Configuration...................................................................................3-12

3.7.1 Connection Settings - TCP................................................................3-14

3.7.2 Connection Settings - UDP............................................................... 3-17

3.8 Email Settings...................................................................................................3-18

3.8.1 Trigger Configuration.......................................................................3-19

3.9 Configurable Pin Settings .................................................................................3-20

3.10 Apply Settings................................................................................................. 3-20

3.11 Apply Factory Defaults...................................................................................3-21

3.12 Configuration Using Telnet.............................................................................3-21

iv NET485 User Guide

3.12.1 Telnet Connection............................................................................3-21

3.12.2 Telnet Messages ..............................................................................3-22

3.13 Server Configuration (Option 0 Network Configuration)...............................3-24

3.13.1 IP Address .......................................................................................3-24

3.13.2 Set Gateway IP Address..................................................................3-24

3.13.3 Netmask: Number of Bits for Host Part ..........................................3-24

3.13.4 Change Telnet configuration password...........................................3-25

3.13.5 DHCP Naming.................................................................................3-26

3.14 Channel 1 Configuration (Serial Port Parameters)..........................................3-26

3.14.1 Baudrate...........................................................................................3-26

3.14.2 I/F (Interface) Mode ........................................................................3-27

3.14.3 Flow.................................................................................................3-27

3.14.4 Port Number ....................................................................................3-28

3.14.5 Connect Mode .................................................................................3-29

3.14.6 Send the Escape Sequence (+++) in Modem Mode.........................3-34

3.14.7 Auto Increment Source Port............................................................3-34

3.14.8 Remote IP Address..........................................................................3-35

3.14.9 Remote Port.....................................................................................3-35

3.14.10 DisConnMode................................................................................3-35

3.14.11 Flush Mode (Buffer Flushing).......................................................3-36

3.14.12 Pack Control..................................................................................3-37

3.14.13 DisConnTime (Inactivity Timeout)...............................................3-37

3.14.14 Send Characters.............................................................................3-38

3.14.15 Telnet Terminal Type....................................................................3-38

3.14.16 Channel (Port) Password...............................................................3-38

3.15 E-mail Settings ................................................................................................3-38

3.15.1 E-mail Setup....................................................................................3-39

3.15.2 Trigger Setup...................................................................................3-39

3.16 Expert Settings.................................................................................................3-40

3.16.1 TCP Keepalive time in seconds.......................................................3-40

3.16.2 ARP Cache timeout in seconds .......................................................3-40

3.16.3 Enable High Performance................................................................3-40

3.16.4 Disable Monitor Mode at Bootup....................................................3-40

3.16.5 RS-485 TX Enable Active Level.....................................................3-40

3.16.6 HTTP Port Number .........................................................................3-41

3.16.7 SMTP Port Number.........................................................................3-41

3.16.8 MTU Size ........................................................................................3-41

3.16.9 Enable Alternate MAC....................................................................3-41

3.16.10 Ethernet Connection Type.............................................................3-41

3.17 Security Settings..............................................................................................3-42

3.17.1 Disable SNMP.................................................................................3-42

3.17.2 SNMP Community Name................................................................3-42

3.17.3 Disable Telnet Setup........................................................................3-42

3.17.4 Disable TFTP Firmware Upgrade ...................................................3-42

3.17.5 Disable Port 77FE (Hex) .................................................................3-43

3.17.6 Disable Web Server.........................................................................3-43

3.17.7 Disable Web Setup ..........................................................................3-43

3.17.8 Disable ECHO Ports........................................................................3-43

3.17.9 Enable Encryption...........................................................................3-43

3.17.10 Enable Enhanced Password...........................................................3-44

3.17.11 Disable Port 77F0 (Hex)................................................................3-44

Contents

NET485 User Guide v

Contents

3.18 Defaults...........................................................................................................3-44

3.19 Exit Configuration Mode ................................................................................3-44

4. Monitoring the Network..................................................................................................4-1

4.1.1 Entering Monitor Mode via the Network Port....................................4-1

4.1.2 Monitor Mode Commands..................................................................4-1

5. Updating Firmware..........................................................................................................5-1

5.1 Obtaining Firmware............................................................................................5-1

5.1.1 Reloading Firmware............................................................................5-1

5.1.2 Via Device Installer ............................................................................5-1

6. Troubleshooting................................................................................................................6-1

6.1.1 Problems and Error Messages.............................................................6-1

7. Binary to Hex Conversion...............................................................................................7-1

7.1.1 Conversion Table................................................................................ 7-1

7.1.2 Scientific Calculator............................................................................ 7-1

List of Figures

Figure 1 - RS485 Transceiver ................................................................................................1-3

Figure 2 - RS422 Four Wire Interface ...................................................................................1-4

Figure 3 - RS485 Network.....................................................................................................1-5

Figure 4 - Main Features........................................................................................................2-1

Figure 5 - Phoenix Connector................................................................................................2-2

Figure 6 - Ethernet Jack .........................................................................................................2-3

Figure 7 - CD Browser Main Window................................................................................... 3-1

Figure 8 - Device Installer Dialog Box..................................................................................3-2

Figure 9 – Device Installer.....................................................................................................3-5

Figure 10 - Setup Mode Window ......................................................................................... 3-23

Figure 11 - Hostlist Option ..................................................................................................3-31

vi NET485 User Guide

List of Tables

Table 1 - RS422/485 Signals..................................................................................................2-2

Table 2 - NET485 LED Functions..........................................................................................2-3

Table 3 - Technical Specs.......................................................................................................2-6

Table 4 - Standard IP Network Netmasks ............................................................................3-24

Table 5 - Netmask Examples................................................................................................3-25

Table 6 - Interface Mode Options.........................................................................................3-27

Table 7 - Common Interface Mode Settings.........................................................................3-27

Table 8 - Flow Control Options............................................................................................3-27

Table 9 - Reserved Ports.......................................................................................................3-28

Table 10 - Connect Mode Options........................................................................................3-29

Table 11 - Manual Connection Address Example................................................................3-31

Table 12 - Modem Mode Commands...................................................................................3-34

Table 13 - Disconnect Mode Options...................................................................................3-35

Table 14 - Flush Mode Options............................................................................................3-36

Table 15 - Pack Control Options..........................................................................................3-37

Contents

NET485 User Guide vii

Overview

1. NET485 Overview

1.1 Overview

The NET485 product allows you to connect to an RS422 / RS485 transceiver to enable remote serial
communications over long distances (up to 4,000 ft.). Using RS485 two-wire mode, you can also connect
the NET485’s serial interface to multiple devices in a multi-drop network. The NET485 is designed around
the XPort-03 Serial to Ethernet device server.

1.2 Overview of RS422 / RS485

RS232 is an EIA standard transmission system and has been around since 1962. RS232 provides single­ended data communications between a transmitter and a receiver. It allows for data transmission from one
transmitter to one receiver at relatively slow data rates (115k bits / second) and short distances (up to 50 ft.
at the maximum data rate).

While RS232 is well-known for connecting PC's to external devices, RS422 and RS485 are not as well
known. When communicating at high data rates, or over long distances in real world environments, single­ended methods are often inadequate. RS422 and RS485 were designed to provide data communications over
longer distances, higher Baud rates and provide better immunity to external electro-magnetic noise.

RS422 and RS485 use differential data transmission (balanced differential signal). This offers superior
performance by canceling the effects of ground shifts and induced noise signals that can appear as common
mode voltages on a network. This also allows for data transmission at much higher data rates (up to 460K
bits / second) and longer distances (up to 4000 ft).

What is the difference between RS422 and RS485? Like RS232, RS422 is intended for point-to-point
communications. In a typical application, RS422 uses four wires (two separate Twisted Pairs of wires) to
transfer data in both directions simultaneously (Full Duplex) or independently (Half Duplex). EIA/TIA-422
specifies the use of one, unidirectional driver (transmitter) with a maximum of 10 receivers. RS422 is often
used in noisy industrial environments or to extend a RS232 line.

RS485 is used in applications where multiple devices want to share data communications on a single serial
network. RS485 can support up to 32 drivers and 32 receivers on a single two wire (one twisted pair) bus.
Most RS485 systems use a Master/Slave architecture, where each slave unit has its unique address and
responds only to packets addressed to it. However, peer to peer networks are also possible.

Specification RS-422 RS-485
Transmission Type Differential Differential
Maximum Data Rate 10 MB/s 10 MB/s
Maximum Cable Length 4000 ft. 4000 ft.
Minimum driver Output Voltage +/- 2V +/- 1.5V
Driver Load Impedance 100 O hm 54 Ohm
Receiver Input Resistance 4 KOhm min 12 KOhm min
Receiver Input Sensitivity +/- 200mV +/- 200mV
Receiver Input Voltage Range -7V to +7V -7V to +12V
No of Drivers Per Line 1 32
No of Receivers Per Line 10 32

NET485 User Guide 1-1

Overview

1.2.1 The RS485 Enable Signal

In a balanced differential system the data signals are produced by a line driver. The line driver generates a
voltage across a pair of signal wires that transmits the data signals. A balanced line driver can have an
optional input signal called an “Enable” signal. The purpose of the enable signal is to connect the driver to
its output terminals. If the enable signal is off, the driver is disconnected from the transmission line. When a
driver is disconnected from the network it is referred to as being in the “tri-state” condition. Because there
are multiple drivers (transmitters) on a RS485 network and only one transmitter can be enabled at a time, the
use of this enable control signal is required on all RS485 networks.

The XPort provides this enable signal for RS485 two-wire applications. When configured for RS485 two­wire applications, the XPort automatically asserts the enable when it is ready to transmit data from its serial
port. Once the data has been transmitted, the XPort automatically de-asserts the enable signal to allow other
nodes to transmit their data.

1.2.2 NET485 Wiring

NOTE: You cannot configure the NET485 through the serial port. The boot program has no control over the
Configurable Pins, so the NET485 will never be able to send data during the boot period (initial 5 seconds).

The XPort can be configured to use any one of the three configurable PIO pins as the RS485_TXEN enable.
The NET485 uses CP1 for the transmit enable. You must enable CP1 for RS485_TXEN during the
configuration process. (See the Quick Start Guide for details)

Note: CP1 is the hardware designation for the XPort physical pin #6. In the web configuration menus, this pin is called
CP0.

You can set the active state of the control pins to LOW or HIGH. The NET485 uses CP1 in the Active High
condition. You must set CP1 to Active High during the configuration process. (See the Quick Start Guide
for details)

Note: CP1 is the hardware designation for the XPort physical pin #6. In the web configuration menus, this pin is called
CP0.

1-2 NET485 User Guide

Overview

The NET485 can handle both RS485 and RS422 communications. This is done by connecting the XPort to a
pair of RS485 transceivers. The following schematic demonstrates how the circuit is wired for RS422 and
RS485.

RE

3.3V

U2

8

Vcc

D

R

GND

5

3.3V

U4

8

Vcc

6

7

RS422
Half-Duplex
Mode

TXDA (Pin 7)

TXDB (Pin 6)

RS485
Mode

TXDA (Pin 7)

TXDB (Pin 6)

3.3V

2

Vcc

XPort 485

TX

CP1

3

DE

4

6

R13

10K

3.3V

4

DI

1

RO

2

3

DE

GND

3.3V
4

5

RX

1

1

2

2

3

1

J2

RO

D

DI

R

RE

GND

5

6

7

RXDA (Pin 5)

RXDB (Pin 4)

SGND (Pin 3 )

RXDA (Pin 5)

RXDB (Pi n 4)

SGND (Pin 3)

Figure 1 - RS485 Transceiver

The transmit section of the XPort is labeled TX on pin 4. The receive section of the XPort is labeled RX on
pin 5. Note that the CP1 pin on the XPort pin 6, which is configured to control the level of RS485_TXEN, is
connected to both transceivers. The transmit section is enabled with a High signal on pin 3, U2 and the
receive section is enabled with a Low signal on pin 2, U4.

There is a jumper option J2 that permits RS485/RS422 Half Duplex or RS422 Full Duplex. With the jumper
in the factory set position between pins 2 and 3, the unit is set for RS485/RS422 Half Duplex.

For RS422 mode, use the four signals produced by the two transceivers plus a signal ground.
For RS485 mode, the TXDA signal is jumpered to the RXDA terminal, and the TXDB signal is jumpered to

the RXDB terminal. The three signals are TXDA, RXDB, and signal ground.

NET485 User Guide 1-3

Overview

1.3 RS422 / RS485 Network connections

1.3.1 RS422 Networks

A typical RS422 application uses a four-wire interface (two twisted pairs) and a shield. RS422 networks are
often used in a half-duplex mode, where a single master in a system sends a command to a slave device and
the slave responds with data. Typically one device (node) is addressed by the host computer and a response
is received from that device. Systems of this type (4-wire, half-duplex) are often constructed to avoid "data
collision" (bus contention) problems on a network. Figure 2 shows a typical RS422 four wire interface.

CP1

DE

40 00 ft.

DE

CP1

TX

RX

CP1

DE

RO

RO

D

DI

TXDA (Pin 7)

R

TXDB (Pin 6)

TXDA

Rt

TXDB

DI

RO

DE

D

DI

R

Rg Rg

RXDA (Pin 5)

RXDB (Pin 4)

SGND (Pin 3)

Rt

RXDA

RXDB

SGND

DI

RO

D

R

D

R

TX

RX

CP1

Figure 2 - RS422 Four Wire Interface

Notice that 5 conductors are used (two twisted pairs and a ground wire). Also, when the cable lengths are
long and/or the data rates are high, the network must be terminated. To terminate the network, a resistor Rt
is added in parallel with the receiver’s A and B lines. Rg is an optional resistor between ground and the
shield. Rt termination resistors are available as option jumpers on the NET485.

Note: Do NOT install termination resistors on short wire networks. See the Application Notes on the product CD for more
information about networks and termination procedures.

1-4 NET485 User Guide

Overview

1.3.2 RS485 Networks

RS485 permits a balanced transmission line to be shared in a party line or multi-drop configuration. As
many as 32 driver / receiver pairs can share a multi-drop network on a single two wire bus. The length of
the network is limited to 4,000 ft. between the first node and the last node. RS485 can be used in two-wire
or four-wire multi-drop network applications.

Figure 3 shows a typical RS485 two-wire multi-drop network. The tri-state capabilities of 485 allow a single
pair of wires to share transmit and receive signals for half-duplex communications. In this configuration, it
is important to prevent more than one device from transmitting at the same time. This is controlled by
software and the communications protocol. Note that the transmission line is terminated on both ends of the
line but not at drop points in the middle of the line. Termination is only required with high data rates and / or
long wire runs.

Note: Do NOT install termination resistors on short wire networks. See the Application Notes on the product CD for more
information about networks and termination procedures.

CP1

DE

DE

CP1

TX

RX

CP1

D

DI

R

RO

DE

SGND (Pin 3)

TXDA (Pin 7)

TXDB (Pin 6)

SGND
TXDA

DI

RO

DE

D

RO

DI

RXDA (Pin 5)

R

RXDB (Pin 4)

RXDB

SGND
TXDA

DI

RO

DE

DI

RO

DE

D

R

D

R

D

R

TX

RX

CP1

CP1

TX

D

DI

RX

CP1

RXDB

RO

R

Figure 3 - RS485 Network

NET485 User Guide 1-5

Introduction

2. Introduction

The NET485 product allows you to connect an RS422 / RS485 transceiver to the Ethernet. Using RS485
two-wire mode, you can connect the NET485’s serial interface to multiple devices in a multi-drop network.

To quickly setup the NET485, please refer to the Quick Start Guide. This section discusses the general
details of the NET485.

Terminator Jumpers

RS422/485 Te rminals

Power T erminals

Ethernet Connection

Power LED

Figure 4 - Main Features

2.1 Protocol Support

The NET485 uses the Internet Protocol (IP) for network communications and the Transmission Control
Protocol (TCP) to assure that no data is lost or duplicated and that everything sent to the connection arrives
correctly at the target.

Other supported protocols include:

• ARP, UDP, TCP, ICMP, Telnet, TFTP, AutoIP, DHCP, HTTP, and SNMP for network

communications and management.

• TCP, UDP, and Telnet for connections to the serial port.

• TFTP for firmware and web page updates.

• IP for addressing, routing, and data block handling over the network.

• User Datagram Protocol (UDP) for typical datagram applications in which devices interact with

other devices without maintaining a point-to-point connection.

NET485 User Guide 2-1

Introduction

2.2 Serial RS422/485 Interface

The table below lists the RS422/485 signals for the NET485. The RS422/485 and power interface is a 7-pin
removable Phoenix connector, with two of the pins used for power.

Table 1 - RS422/485 Signals

NET485 Signal 7-Pin Phoenix

TXDA 7
TXDB 6
RXDA 5
RXDB 4

SGND 3

GND 2

8-24VDC 1

RX TERM
TX TERM
TXDA
TXDB
RXDA
RXDB
SGND
GND
8-24VDC

Figure 5 - Phoenix Connector

The NET485 uses protective clamping structures on its inputs and outputs that clamp the voltage to a safe
level and dissipate the energy present in ESD (electrostatic) and EFT (electrical fast transients) discharges.
This protection structure achieves ESD protection up to 8 kV according to IEC1000-4-2, and EFT protection
up to 2 kV on all input/output (I/O) lines.

The NET485 has jumper terminals for adding termination resistors to the RX and TX lines. Add these
jumpers ONLY if you have long transmission lines and termination resistors are needed.

Note: Do NOT use RX Term and TX Term jumpers on short transmission lines. Remove these jumpers to remove the
120 Ohm resistors from the transmit and receive lines.

Note: See the Application Notes on the product CD for more information about networks and ter mination procedures.

2.3 Power Supply

The NET485 can use any DC power source from 8VDC to 24VDC. The current draw is determined by
network activity and serial port communications. In general, a 500ma supply will handle the load.

Most modular power supplies use the same style of designating which lead is positive and which one is
negative. Generally, the lead with a white stripe, or white markings, is the positive lead. Verify the lead
markings with a meter before connecting a power source to the NET485.

Connect the positive lead to the terminal marked 8-24VDC. Connect the negative lead to the terminal
marked GND. See Figure 5 for lead identification. The power LED will come on when power is supplied.
See Figure 4 and Figure 6 for the location of the Power LED.

The unit will go through a self-test and will attempt to connect to a server. The LEDs on the Ethernet
connector will indicate the connection status. See Ethernet Interface.

2-2 NET485 User Guide

2.4 Ethernet Interface

The NET485 device contains the following LEDs:

• 10BaseT/100BaseTX (Bi-color, Left LED)

• Full/Half Duplex (Bi-color, Right LED)

POWER
LED

Figure 6 - Ethernet Jack
Table 2 - NET485 LED Functions

Left LED Right LED Meaning

Solid Amber 10BASE-T
Solid Green 100BASE-Tx
Blinking Amber Half Duplex Activity
Blinking Green Full Duplex Activity

LEFT
LED

Introduction

NET485 User Guide 2-3

Introduction

2.5 Product CD

The CD sent with the NET485 contains Device Installer software and technical manuals to support the
NET485. Device Installer allows for fast and easy configuration of the NET485.

1. Insert the CD into your CD-ROM drive. The CD will automatically start and display the main window.

If the CD does not launch automatically:
a) Click the Start button on the Task Bar and select Run.
b) Enter your CD drive letter, colon, backslash, Launch.exe (e.g., D:\Launch.exe).

To view the Quick Start Guide, click on Quick Start Guide button.
To view the technical documents, click on NET485 Documentation. The technical manuals are in PDF

format. If you do not have Acrobat Reader installed, you can install it from the CD.
To install Device Installer, Java RE, Microsoft .NET Framework, or other software products, click the

NET485 Software button. For more information about Device Installer, see Device Installer on page 3-1.

2-4 NET485 User Guide

Introduction

2.6 Additional Documentation

The following guides are available on the product CD. There are several other manuals on the CD, however,
they do not apply to the NET485 product.

Title Description File Name
NET485 User

Guide
Device Installer

User Guide
Comm Port

Redirector Guide

Web Enable User
Guide

GPIO Interface
Guide

UDP Configuration
Guide

Tech Notes

This manual in PDF format. NET485_UM_800240_a.pdf

Information about installing and using
Device Installer Utility.

Provides information on using the
Windows based utility to create a
virtual com port.

Explains the steps to get your device
Web enabled.

Introduction to the GPIO interface and
a demo program.

How to use UDP to configure the unit.
How to acquire and use setup records
to configure a unit.

Additional information to aid in using
the NET485.

Dev_Inst_UG_800233_a.pdf

Redirector_UG_800235_a.pdf

Web_Enabling_UG_800236_a.pdf

GPIO_800237_a.pdf

UDPconfig_800238_a.pdf

485_Notes_800239_a.pdf

NET485 User Guide 2-5

Introduction

2.7 Technical Specifications

Table 3 - Technical Specs

The transceiver used in the NET485 is intended for balanced data transmission and complies with both EIA
Standards RS-485 and RS-422. It contains a differential line driver and a differential line receiver, and is
suitable for half-duplex transfer. The input impedance is 19KOhm allowing up to 50 transceivers to be
connected on the bus.

Category Description

CPU

Firmware Upgradeable via TFTP
Reset Circuit Reset In is low active. (Software rese t only )
Serial Interface RS422/485. Baudrate software selectable (300 to 921600)
Serial Line Formats 7 or 8 data bits, 1-2 Stop bits, Parity: odd, even, none
Network Interface RJ45 Ethernet 10Base-T or 100Base-TX (Auto-sensing)
Compatibility Ethernet: Version 2.0/IEEE 802.3
Protocols Supported ARP, UDP, TCP, Telnet, ICMP, SNMP, DHCP, BOOTP, TFTP, Auto IP, SMTP, and

Power Input
LEDs 10Base-T & 100Base-TX Activity, Full/half duplex.

Management Internal web server, SNMP (read only) Serial login, Telnet login
Security Password protection, Locking features, optional Rijndael 128-bit encryption
Internal Web Server Serves static web pages and Java applets
Weight 1.7oz
Material Case: Flame Retardant
Temperature Operating range: -40°C to +85°C (-40°F to 185°F) High performance mode has an

Relative Humidity Operating: 5% to 95% non-condensing
Warranty 1-year limited warranty
Included Software Windows™ 98/NT/2000/XP based Device Installer configuration software, Windows™

EMI Compliance

DSTni-EX 186 CPU, 256 KB zero wait state SRAM
2048KB Flash, 16KB Boot ROM, 1024KB SRAM

HTTP

8VDC to 24VDC, approximately 200ma.

upper temperature limit of 75°C.

based Comm Port Redirector.
Radiated & conducted emissions - complies with Class B limits of EN 55022:1998
Direct & Indirect ESD - complies with EN55024:1998
RF Electromagnetic Field Immunity - complies with EN55024:1998
Electrical Fast Transient/Burst Immunity - complies with EN55024:1998
Power Frequency Magnetic Field Immunity - complies with EN55024:1998
RF Common Mode Conducted Susceptibility - complies with EN55024:1998

2-6 NET485 User Guide

Device Installer

3. Device Installer

3.1.1 Microsoft NET Framework

Microsoft .NET is the Microsoft strategy for connecting systems, information, and devices through Web
services so people can collaborate and communicate more effectively. .NET technology is integrated
throughout Microsoft products, providing the capability to quickly build, deploy, manage, and use
connected, security-enhanced solutions through the use of Web services.

Web services are small, reusable applications that help computers from many different operating system
platforms work together by exchanging messages. Web services are based on industry protocols that include

XML (Extensible Markup Language), SOAP (Simple Object Access Protocol), and WSDL (Web Services

Description Language). These protocols help computers work together across platforms and programming
languages.

From a business perspective, Web services are used to reenable information technology so that it can
change, move, and adapt like other aspects of a business. They not only connect systems, they can help
connect people with the information they need, within the software applications they are used to using, and
wherever they happen to be.

Device Installer uses .NET Framework to adapt the NET485 for Web services. Your system must have
.NET Framework installed for Device Installer to work properly. Installation options are included on the
software CD.

3.1.2 Install Device Installer

1. Insert the product CD into your CD-ROM drive. The CD will automatically start and display the main

window.

If the CD does not launch automatically:
a) Click the Start button on the Task Bar and select Run.
b) Enter your CD drive letter, colon, backslash, Launch.exe (e.g., D:\Launch.exe).

Figure 7 - CD Browser Main Window

NET485 User Guide 3-1