ControlByWeb WebRelay-Quad X-WR-4R1-5 User manual

Revision: 2.2 - June 8, 2007
a division of...
Xytronix Research & Design, Inc.
North Logan, Utah, USA
(c) 2006-2007 Xytronix Research & Design, Inc.
Covers: X-WR-4R1-5
X-WR-4R1-I
X-WR-4R1-E
WebRelay-Quad
TM
Users Manual
TM

Revision 2.2b WebRelay-QuadTM Users Manual
Contents
Trademark and Copyright Information
Warranty
FCC Statement
Installation uidelines (Read Before Installing)
Section 1: Introduction
1.1 Features
1.2 WebRelay-QuadTM Models Available
1.3 Connectors & Indicators
1.4 Example Configurations and Applications
1.4.1 Basic Setup
1.4.2 Controlling High Power Devices
1.4.3 Using WebRelay-QuadTM Without a Computer
Section 2: Installation and Setup
2.1 Mounting
2.1.1 Wall Mounting
2.1.2 DIN-Rail Mounting
2.2 Connection
2.2.1 Power Supply Connection
2.2.2 Network Connection
2.2.3 Relay Connection
2.3 Establishing Communications for Setup
2.3.1 Option 1: Assign a temporary IP address to WebRelay-QuadTM
2.3.2 Option 2: Assign a temporary IP address to configuration computer
2.3.3 Open Configuration Web Page
2.4 Web-Based Setup
2.4.1 Main Setup Page
2.4.2 Network Setup Page
2.4.3 Password Setup Page
2.4.4 Relay Setup Pages
Section 3: Operation
3.1 Browser Operation
3.2 XML Operation
3.3 Modbus Operation
3.3.1 Read Coils (Modbus Function Code 01 (0x01))
3.3.2 Write Single Coil (Modbus Function Code 05 (0x05))
3.3.3 Write Multiple Coils (Modbus Function Code 15 (0x0F))
3.3.4 Write Multiple Registers (Modbus Function Code 16 (0x10))
Appendix A: Restoring Factory Default Settings
Appendix B: Specifications
Appendix C: Mechanical Information
Appendix D: Open TCP Legal Notice
Xytronix Research & Design, Inc. page 1

Revision 2.2b WebRelay-QuadTM Users Manual
Trademark and Copyright Information
This document is Copyright ©2005-2007 by Xytronix Research & Design, Inc. All rights reserved.
WebRelay-QuadTM and ControlByWebTM are Trademarks of Xytronix Research & Design, Inc. 2005-2007.
Portions of the software used in WebRelay-QuadTM are open source and appropriate copyright and legal notices are
listed at the end of this manual. All other parts of the software are property of Xytronix Research & Design, Inc.
©2005-2007. The hardware design, schematics, PCB layout, concept, graphics, users manual, etc., are property of
Xytronix Research & Design, Inc. ©2005-2007. WebRelay-QuadTM may not be opened, dis-assembled, copied or
reverse engineered.
No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical,
including photocopying or scanning, for any purpose other than the personal use by the purchaser of this product.
Xytronix Research & Design, Inc., assumes no responsibility for any errors that may appear in this document.
Whereas effort has been made to make the information in this document as useful and accurate as possible, Xytronix
Research & Design, Inc. assumes no responsibility for the application, usefulness, or completeness of the information
contained herein. Under no circumstance will Xytronix Research & Design, Inc. be responsible or liable for any
damages or losses including direct, indirect, special, incidental, or consequential damages or losses arising from
either the use of any information contained within this manual or the use of any products or services referenced in
this manual.
Xytronix Research & Design, Inc. reserves the right to change any product’s features, specifications, documentation,
warranties, fee schedules, and conditions at any time and without notice.
Warranty
This Xytronix Research & Design, Inc. product has a warranty against defects in material and workmanship for a
period of one year from the date of shipment. During the warranty period, Xytronix Research & Design, Inc. will, at
its option, either repair or replace products that prove to be defective. This warranty is extended to the original
purchaser of the equipment only.
For warranty service or repair, the product must be properly packaged, and returned to Xytronix Research & Design,
Inc. The purchaser shall prepay all charges for shipping to Xytronix Research & Design, Inc., and Xytronix Research
& Design, Inc. will pay the shipping charges to return the product to the purchaser as long as the product is shipped
within the United States. If the product is shipped outside of the United States, the purchaser shall pay all shipping
charges, duties, and taxes.
Limitation
The foregoing warranty shall not apply to defects or damage resulting from improper use or misuse, unauthorized
repair, tampering, modification, improper connection, or operation outside the electrical/environmental specifications
for the product. Further, the warranty does not cover Acts of od, such as fire, flood, hurricanes, and tornadoes.
This warranty does not cover damage to property, equipment, direct, indirect, consequential, or incidental damage
(including damage for loss of business profit, business interruption, loss of data, and the like) arising out of the use or
misuse of this product. UNDER NO CIRCUMSTANCES WILL THE LIABILITY OF XYTRONIX RESEARCH &
DESI N, INC. TO THE PURCHASER OR ANY OTHER PARTY EXCEED THE ORI INAL PURCHASE
PRICE OF THE PRODUCT, RE ARDLESS OF THE FORM OF THE CLAIM. No other warranty is expressed or
implied. Xytronix Research & Design, Inc. specifically disclaims the implied warranties or merchantability and
fitness for a particular purpose. Some jurisdictions may not allow the exclusion of limitation of liability for
consequential or incidental damage.
Xytronix Research & Design, Inc. page 2

Revision 2.2b WebRelay-QuadTM Users Manual
FCC Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
• This device may not cause harmful interference.
• This device must accept any interference received, including interference that may cause undesired operation.
Warning: This equipment has been tested and found to comply with the limits for a Class B (Class A for POE
model) digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio
or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Notice: Changes or modification not expressly approved by the party responsible for compliance could void the
user’s authority to operate the equipment.
Installation Guidelines (Read efore Installing)
- Do not open the WebRelay-QuadTM enclosure. This will void the warranty.
- This unit must be installed by qualified personnel.
- This unit must not be installed directly outdoors.
- This unit must not be used for medical, life saving purposes, or for any purpose where its failure could cause serious
injury or the loss of life.
Notes about security:
By design, WebRelay-QuadTM is very secure. It does not support terminal or file transfer programs such as telnet, ftp,
ssh, etc. This means that it is not possible for someone to ‘break in’ to WebRelay-QuadTM and access other devices on
your local network. WebRelay-QuadTM does not support remote firmware updates which means that it is not possible
for someone to remotely install malicious software. The simplicity of WebRelay-QuadTM makes it a very secure
device. As with any device to be installed on a network, there are some security precautions that should be observed.
If WebRelay-QuadTM is installed on the Internet, it is recommended that passwords be enabled for the control page.
Make sure secure passwords are used. Passwords should be at least 8 characters in length and should be a
combination of upper case letters, lower case letters, and numbers. Don’t use passwords that would be easy to guess.
For additional security, a firewall may be used to limit access only to selected IP addresses. Another option may be
to set up a Virtual Private Network (VPN) between the network where WebRelay-QuadTM resides and the client
machine (web browser, second WebRelay-QuadTM, etc.).
Final installation note. This ControlByWebTM product supports connection to 10Mbps and 100Mbps networks.
Although 100Mbps networks are faster, the amount of data transferred to and from this device is very minimal and
little if any performance increase will be gained by setting it to 100Mbps. There are advantages however, to operate
this device at 10Mbps. At 10Mbps, less power is required, the unit runs cooler, and the lifetime of the product will be
extended.
Xytronix Research & Design, Inc. page 3

Revision 2.2b WebRelay-QuadTM Users Manual
Section 1: Introduction
WebRelay-QuadTM is a compact, four-relay module with a built in web server. It can be controlled and/or monitored
over any IP network including private networks, IP-based industrial control networks, and the Internet. Users can
operate WebRelay-QuadTM using a web browser or a custom application. Computers, PLCs, or automation controllers
may control and monitor WebRelay-QuadTM without user intervention. This works by sending text commands over
the network and reading XML status pages from WebRelay-QuadTM, or by using Modbus/TCP protocol.
WebRelay-QuadTM has many applications and is only limited by imagination. It works very well as a stand-alone
device that can be controlled using a web browser or as a convenient way to add I/O to a computer. It can be used in
industrial applications to control motors, lights, coils, pumps, valves, etc.
1.1 Features
WebRelay-QuadTM is very simple but has many features. Some features include...
•No programming required
•Easy to use as a stand alone device or as part of a large control system
•Built-in web server provides simple, web based configuration and control
•Control page can be customized with appropriate text and buttons
•10/100 Ethernet connectivity
•Four, 24Volt 1-Amp relays
•Removable terminal connectors (included) simplifies wiring and service
•Custom applications can control WebRelay-QuadTM with simple text commands and read XML formatted
status.
•Modbus/TCP protocol support provides inter-interoperability with devices/software from other
manufacturers.
•Password protection
•Selectable TCP ports
•On/Off or pulse mode
•DIN-Rail or Wall Mount
1.2 WebRelay-QuadTM Models Available
WebRelay-QuadTM is currently available in three models. The only difference between the three models is the power
supply requirements.
Part Number Power Supply Requirements
X-WR-4R1-5 5VDC
X-WR-4R1-I 9-28VDC
X-WR-4R1-E Power Over Ethernet or 5VDC
1.3 Connectors & Indicators
WebRelay-QuadTM has a removable terminal connector and an Ethernet connector. The terminal connector is used to
provide power to the internal web server, and is used to connect external electrical loads to the relay contacts.
There are seven LED indicators on WebRelay-QuadTM. The Power LED (green) indicates that the unit is powered.
Four LEDs (green) labeled Relay 1-4 which indicate that the corresponding relay coil is energized. When the relay
coils are energized, the NO (Nornally Open) contacts are closed and the NC (Normally Closed) contacts are open.
The load device that is connected to the relay contacts may be on or off when the coil is energized depending on how
it is wired. The LINK (green) LED indicates that WebRelay-QuadTM is properly connected to an Ethernet network.
The ACK LED (amber) flashes when there is network activity. Note that the LINK and ACT LEDs are located on
the Ethernet connector.
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Revision 2.2b WebRelay-QuadTM Users Manual
1.4 Example Configurations and Applications
WebRelay-QuadTM is very versatile and can be used in many applications. Several basic installation schemes are
illustrated in this section.
Xytronix Research & Design, Inc. page 5
Removable
Terminal Strip
Relay
Status
Indicator
Lights
Power
Indicator
Light
Network
Link
Light
Network
Activity
Light
Ethernet
onnector

Revision 2.2b WebRelay-QuadTM Users Manual
1.4.1 asic Setup
The illustration below shows a simple WebRelay-QuadTM application. The example shows how a 3-color
industrial light tower can be controlled remotely over an Ethernet network. The three lights are connected to
three of the relays so each light can be controlled individually. The lights can be connected directly to the
relay contacts because they are low power lights (LEDs). The controller can be a web browser, a custom
control application running on a computer, a PLC, or an embedded industrial controller. Commands are sent
to WebRelay-QuadTM over the Ethernet network using standard IP protocols so the controller can be placed
physically next to the light tower or a distance away.
Xytronix Research & Design, Inc. page 6
Computer, PLC, Industrial
Controller, etc.
IP
Network
WebRelay-Quad
OM
+V
Power Supply
for Lig t Tower
Vin+
1
1NO
Vin-
2
2NO
3
3NO
OM
Light 3
Light 1
Light 2
Power Supply for WebRelay-
Quad Device to be
Controlled
(Lig t Tower)
Note that a single power supply could be
used to power both WebRelay-Quad and
Light Tower.

Revision 2.2b WebRelay-QuadTM Users Manual
1.4.2 Controlling High Power Devices
WebRelay-QuadTM can be used to control high power devices by using an external relay. In this
configuration, WebRelay-QuadTM does not control the load directly, but controls the external relay and the
external relay controls the load. This is illustrated below.
Xytronix Research & Design, Inc. page 7
25 Amp
Solid State Relay
Computer, PLC, Industrial Controller, etc.
IP
Network
WebRelay-Quad
Power Supply
(Powers WebRelay)
(5VDC or 9-28VDC)
240V
AC Power
Source
Device to be
Controlled
Vin-
Vin+
1NO
1
+
Input
-
Line
Neutral

Revision 2.2b WebRelay-QuadTM Users Manual
1.4.3 Using WebRelay-QuadTM Without a Computer
WebRelay-QuadTM can be used in conjunction with other ControlByWeb products such as WebRelayTM or
the Five- Input Module. This allows users to control devices at a remote location by using switches or
buttons instead of using a computer. The illustration below shows how three switches can remotely control
three indicator lights in a light tower at a remote location. This configuration offers many possibilities in
security and remote control. The inputs can be driven by switches, sensors, or digital outputs from a PLC or
automation controller.
Xytronix Research & Design, Inc. page 8
IP
Network
WebRelay-Quad
OM
+V
Power Supply
for Lig t Tower
1NO
2NO
To 1 , 2 , and 3
3NO
OM
Light 3
Light 1
Light 2
Power Supply for WebRelay-
Quad
Lig t Tower
Five Input Module
Vin+
Vin-
Vin+
Vin-
Power Supply for
Five Input Module
Switc es
Lig t 1
Lig t 2
Lig t 3
+5
In1+
In2+
In3+
Gnd
In1-
In2-
In3-

Revision 2.2b WebRelay-QuadTM Users Manual
Section 2: Installation and Setup
Installation consists of mounting WebRelay-QuadTM, connecting to an IP network, providing power, configuring via a
web browser, and wiring relay contacts to the device that will be controlled.
2.1 Mounting
WebRelay-QuadTM can be be wall mounted or DIN rail mounted. It should be mounted in a clean dry location where
it is protected from the elements. Ventilation is recommended for installations where ambient air temperature is
expected to be high.
2.1.1 Wall Mounting
WebRelay-QuadTM includes two keyholes in the rear of its enclosure for wall mounting. Mount to a wall by
using two #8 screws. Attach the screws to the wall vertically spaced exactly 2.5 inches apart. The head of
the screws should be about 1/10 inch away from the wall. See Appendix C for mechanical details.
2.1.2 DIN-Rail Mounting
WebRelay-QuadTM can be mounted to a standard (35mm by 7.55mm) DIN rail. Attach WebRelay-QuadTM to
the DIN rail by hooking the top hook on the back of the enclosure to the DIN rail and then snap the bottom
hook into place. Remove WebRelay-QuadTM from DIN rail using a flat-head screwdriver. Insert the
screwdriver into the notch in the release tab and pry against the enclosure to release the bottom hook.
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Revision 2.2b WebRelay-QuadTM Users Manual
2.2 Connection
CAUTION: MAKE SURE POWER IS SHUT OFF BEFORE WIRIN !
Two removable terminal connectors are provided for simple wiring to WebRelay-QuadTM. The correct wiring
procedure is as follows;
1. Make sure power is turned off.
2. Remove terminal connectors from WebRelay-QuadTM and make wiring connections to the terminals.
3. Reconnect terminal connectors.
4. Apply power.
It is recommended that the load (device to be controlled) not be connected to WebRelay-QuadTM until after
WebRelay-QuadTM has been configured and tested. By doing this, wiring and configuration mistakes will not cause
the load device to turn on unexpectedly.
IMPORTANT: MAKE SURE WIRES ARE PROPERLY ATTACHED TO THE TERMINALS!
Xytronix Research & Design, Inc. page 10
Bad onnector Example.
Good onnector Example.
Wires are stripped too far back
Strand(s) of wire are loose
Wires are stripped correct
amount and there are no loose
strands that can cause shorts

Revision 2.2b WebRelay-QuadTM Users Manual
14-pin connector pinout:
Pin Description
VIN+ Power supply input. Connect to the positive side of the appropriate power supply. DO NOT
EXCEED MAXIMUM POWER SUPPLY VOLTA E.
Model X-WR-4R1-5
5VDC Power supply
Model X-WR-4R1-I
9~28VDC Power supply
Model X-WR-4R1-E
Power Over Ethernet model. These units do not require a power supply to be connected to this
pin when the unit is connected to an 802.3af compliant network. Alternatively, this model can be
powered using a 5VDC power supply.
VIN- Power supply ground (-) connection.
1C Relay 1 Common Contact
1NC Relay 1 Normally Closed Contact
1NO Relay 1 Normally Open Contact
2C Relay 2 Common Contact
2NC Relay 2 Normally Closed Contact
2NO Relay 2 Normally Open Contact
3C Relay 3 Common Contact
3NC Relay 3 Normally Closed Contact
3NO Relay 3 Normally Open Contact
4C Relay 4 Common Contact
4NC Relay 4 Normally Closed Contact
4NO Relay 4 Normally Open Contact
2.2.1 Power Supply Connection
WebRelay-QuadTM requires power for its internal logic circuits. Connect appropriate power supply to the
Vin+ and Vin- terminals. Alternatively, WebRelay-QuadTM units with the Power Over Ethernet option may
be powered through the Ethernet connection instead of using an external power supply.
Multiple WebRelay-QuadTM units may be connected to a single power supply by connecting the power
supply input terminals in parallel. The power supply must have a high enough current rating to power all
units connected (see specifications for current requirements for a specific model number).
WebRelay-QuadTM units with the Power Over Ethernet option may be connected to an 802.3af compliant
Ethernet port instead of connecting an external power supply. In this case, WebRelay-QuadTM is powered
through the network port. In an 802.3af compliant network, a 48 Volt power source is injected into the
Ethernet line. This power source is provided by an 802.3af compliant hub, switch, or power injector which
may be located in a utility closet which could be a distance away from WebRelay-QuadTM. This option is
very useful for installations where local power is not available. The power injector may inject the 48 Volt
power source through the data lines or the spare lines in the Ethernet cable. DO NOT USE A POWER
INJECTOR THAT APPLIES A VOLTA E TO BOTH THE DATA LINES AND THE SPARE LINES.
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Revision 2.2b WebRelay-QuadTM Users Manual
2.2.2 Network Connection
Connect the Ethernet port to a 10 Base T or 10/100 Base T Ethernet connection. This typically connects to
an Ethernet hub, switch, or router. For configuration, WebRelay-QuadTM may be connected directly to the
Ethernet port on a computer using a “crossover” cable. Otherwise for connection through a hub or router, a
standard “straight-thru” cable should be used.
2.2.3 Relay Connection
The relay contacts internally connect directly to the 14-pin connector. No internal fuse is provided. The
relay contacts are rated at 1 Amp max (28V max). For larger loads, an external relay may be used to control
the load.
2.3 Establishing Communications for Setup
WebRelay-QuadTM is set up using a web browser. The first task is to establish communications between a computer
and the WebRelay-QuadTM device so that the browser-based configuration can begin. To do this, the computer and
WebRelay-QuadTM must be physically connected to the same network and both must have IP addresses on the same
network. There are two ways to set up the computer and WebRelay-QuadTM so that they are on the same network.
The first way (Option 1), is to change the IP address of WebRelay-QuadTM to an address that is on the same network
as the computer. The second way (Option 2) is to change the IP address of the computer to an address that is on the
same network that WebRelay-QuadTM is set to by default.
2.3.1 Option 1: Assign a temporary IP address to WebRelay-QuadTM
This option is used to TEMPORARILY assign an IP address to WebRelay-QuadTM without the need to
change the IP address of the configuration computer. Note that WebRelay-QuadTM will only use this IP
address as long as power is maintained. Once power is lost and restored, WebRelay-QuadTM will use the IP
address assigned in the setup page and not the temporary address assigned here. This means that once
communications are established, the desired IP address should be entered into the network setup page using
the browser.
To assign the temporary IP address...
1. Make sure WebRelay-QuadTM and the configuration computer are connected to the same physical
network. This will not work through routers or gateways.
2. Assign the address as follows...
Windows :
Open a Command Prompt (on Windows XP, select START, then RUN, then type “cmd”).
Type...
arp -s {new IP address} {serial number of WebRelay-QuadTM }
Note: IP address format is: xxx.xxx.xxx.xxx
Serial number format is: ss-ss-ss-ss-ss-ss
For example, to set a WebRelay-QuadTM device (with serial number 00-0C-C8-01-00-01 )
to 10.10.10.40 the following command would be used.
arp -s 10.10.10.40 00-0c-c8-01-00-01
Next, type...
ping -l 02 {new IP address}
For example, if the new IP address is 10.10.10.40, the following command would be
used.
ping -l 102 10.10.10.40
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Revision 2.2b WebRelay-QuadTM Users Manual
Linux/Unix:
Open a terminal, change to root user (su -, then enter root password).
Type...
arp -s {new IP address} {serial number of WebRelay-QuadTM }
Note: IP address format is: xxx.xxx.xxx.xxx
Serial number format is: ss:ss:ss:ss:ss:ss
For example, to set a WebRelay-QuadTM device (with serial number 00-0C-C8-01-00-01 )
to 10.10.10.40 the following command would be used.
arp -s 10.10.10.40 00:0c:c8:01:00:01
Next, type...
ping -s 02 {new IP address}
For example, if the new IP address is 10.10.10.40, the following command would be
used.
ping -s 102 10.10.10.40
Mac OS X
Open a terminal,
Note that the terminal is in the “Utilities” directory which is in “Applications” directory.
type
sudo arp -s {new IP address} {serial number of WebRelay-QuadTM }
Note: Administrator password is required.
IP address format is: xxx.xxx.xxx.xxx
Serial number format is: ss:ss:ss:ss:ss:ss
For example, to set a WebRelay-QuadTM device (with serial number 00-0C-C8-01-00-01 )
to 10.10.10.40 the following command would be used.
sudo arp -s 10.10.10.40 00:0c:c8:01:00:01
Next, type...
ping -s 02 {new IP address}
For example, if the new IP address is 10.10.10.40, the following command would be
used.
ping -s 102 10.10.10.40
2.3.2 Option 2: Assign a temporary IP address to configuration computer
If the first option above is not used, you can use this option to communicate with WebRelay-QuadTM . By
default, WebRelay-QuadTM comes from the factory with an IP address of 192.168.1.2. Communications with
WebRelay-QuadTM may be established by assigning an IP address to the configuration computer that is on
the same network as WebRelay-QuadTM (for example the configuration computer could be assigned to
192.168.1.5) .
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Revision 2.2b WebRelay-QuadTM Users Manual
Instructions for changing the IP address of the computer that will be used for WebRelay-QuadTM
configuration are given here. Note that these instructions are specifically for computers with the Windows
XP operating system. For setup using other operating systems, refer to the appropriate users manual.
Step 1: Open the control panel by clicking on the start menu and then clicking on Control Panel. (Note that
control panel shown is in “Classic View”. If control panel is in “Category View” select the “Classic View”
option before proceeding.)
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Revision 2.2b WebRelay-QuadTM Users Manual
Step 2: Double click on the icon labeled Network Connections. The following menu will pop up.
Step 3: Right click on the icon labeled Local Area Connection. Another menu will appear. Select the option
at the bottom of the menu labeled Properties. The Local Area Connection Properties window will appear.
Step 4: On the Local Area Connection Properties page scroll down to Internet Protocol (TCP/IP), select it,
and then click the button labeled properties.
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Revision 2.2b WebRelay-QuadTM Users Manual
Step 5: Before making any changes to the network settings, write down the current settings so they can
be restored once WebRelay-QuadTM is configured. Next, select the radio button labeled “Use the following
IP address,” and type in the IP address 192.168.1.50. Type in a subnet mask of 255.255.255.0. Leave the
default gateway field blank. Click OK to apply settings.
2.3.3 Open Configuration Web Page
Once the network is set up, open the configuration setup page by typing the following URL into the browser:
http://192.168.1.2/setup.html (note that if option 1 above was used for initial configuration, replace the IP
address given here with the newly assigned IP address). A password is required to change any parameters.
The default password is ‘webrelay’ (do not include quotes, password is case sensitive).
2.4 Web- ased Setup
WebRelay-QuadTM is fully configurable through HTML 4.0 compliant web browsers such as Internet Explorer and
Mozilla Firefox. It’s easy to use tab based menu system has been designed to allow the unit to be configured easily.
Note that in this chapter, the default IP address of 192.168.1.2 is used in all examples. If the IP address has been
changed, substitute the new IP address for the address shown in the examples.
Before proceeding, make sure a network connection has been established between the computer and WebRelay-
QuadTM. This is done by typing the following URL into the web browser: http://192.168.1.2/setup.html. Another
way to check communications is to ping WebRelay-QuadTM (from the command prompt (type ping 192.168.1.2)).
Each setup page is described below.
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Revision 2.2b WebRelay-QuadTM Users Manual
2.4.1 Main Setup Page
This is the initial page that appears when the URL http://192.168.1.2/setup.html is entered into the web
browser. It provides basic information about the WebRelay-QuadTM unit.
Navigating between setup pages is done by clicking on the tabs at the top of the page. All setup pages
require a password. The default password is ‘webrelay’ (no quotes, all lower case) and no user name
is required.
Each setup page has a “Submit” button and a “Reset” button at the bottom of the page. After entering the
desired parameters into each page, the “Submit” button must be pressed before any parameters will be
saved. If a mistake is made in entering the parameters, the “Reset” button may be used to restore all
parameters on the page to their current settings. The “Reset” button is only effective before the “Submit”
button is pressed.
2.4.2 Network Setup Page
The network parameters are changed on this page. Note that if multiple WebRelay-QuadTM units are used on
the same network, install one unit at a time and set the IP address of each unit before connecting the next
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Revision 2.2b WebRelay-QuadTM Users Manual
unit to the network. This avoids having multiple WebRelay-QuadTM units installed on the network with the
same factory default IP address at the same time. It may be necessary to clear the arp cache each time you
swap WebRelay-QuadTM units on the network (this is because each unit has the same default IP address but
different mac address). This is done by typing arp -d in the command prompt of a Windows computer
(arp -d -a as super user on Apple OSX). Also note that the unit must be power-cycled (power
disconnected, then
reconnected) before network settings take effect. No other setup page requires power-cycling for the
settings take effect.
1. IP Address:
WebRelay-QuadTM requires a static IP address. This is a unique address that identifies
WebRelay-QuadTM on the network. Dynamic IP address assignment is not supported. The
lack of dynamic IP addressing support is intentional because a dynamically changing the
IP address would make it difficult for a client to access the web server built into
WebRelay-QuadTM. The IP address is specific to the network where WebRelay-QuadTM
will be installed, and must be obtained from the network administrator.
This guide is not meant to be a tutorial on IP addressing, however a few comments about IP
addressing are given here.
If WebRelay-QuadTM will be used over the Internet, the IP address must be a routable address
assigned by the upstream Internet Service Provider (ISP).
In cases where the ISP only provides a single routable IP address for the entire network (this is
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Revision 2.2b WebRelay-QuadTM Users Manual
typical with ISPs such as cable providers), a proxy server (or gateway router) may be used. A
proxy server allows multiple devices to connect to the Internet using a single routable IP address.
Many small routers from LinkSys, Dlink, and Netgear perform proxy server functions. If a proxy
server is used, WebRelay-QuadTM will not be accessible from the Internet until the proxy server is
properly configured (forward proper port to WebRelay-QuadTM). This information is mentioned for
convenience but details of setting up a configuration such as this is beyond the scope of this
manual.
If WebRelay-QuadTM is used on a private network only and is NOT used over the Internet, a
routable IP address is not necessary. This may be the case when WebRelay-QuadTM is used to
control (or monitor) a device in another room or a nearby building.
If WebRelay-QuadTM will be installed on a simple, private network that does not connect to the
Internet, the default IP address may be used as long as no other device on the network uses the
same address. If multiple WebRelay-QuadTM units are installed on the same network, each unit
must have its own unique IP address. For example, WebRelay-QuadTM comes from the factory
with a default IP address of 192.168.1.2. If multiple units are used, change the IP address for each
unit (192.168.1.3, 192.168.1.4, 192.168.1.5 etc.).
2. Netmask:
This specifies the size of the local network. This must be obtained from the network
administrator. By default, the netmask is set to 255.255.255.0.
3. Broadcast:
This specifies the broadcast address. This must be obtained from the network
administrator. By default, this is set to 192.168.1.255.
4. ateway:
This specifies the IP address of the gateway router. This must be obtained from the
network administrator. By default, this is set to 192.168.1.1.
5. TCP Port:
This specifies the TCP port used for communications with WebRelay-QuadTM. By default,
the port is set to 80 which is the standard http port. It is recommended that the port not be
changed without an understanding of TCP/IP and ports.
Changing the port can be useful for accessing multiple WebRelay-QuadTM devices which
are installed behind a gateway router on a private network that uses non-routable IP
addresses (192.168.x.x, 10.x.x.x, and 172.16.x.x through 172.31.x.x are non-routable or
private IP addresses). In this case, each WebRelay-QuadTM unit would be assigned a
different port (for example 8000, 8001, 8002, etc). The gateway router would be set up to
forward all traffic for each of the assigned ports to the IP address of the WebRelay-QuadTM
unit which uses that port. The WebRelay-QuadTM units could then be accessed from
outside the private network by entering the IP address of the gateway and the port for the
desired WebRelay-QuadTM unit. Note that whenever any port is assigned other than port
80, all communications with that WebRelay-QuadTM device must include the port. For
example, if WebRelay-QuadTM is assigned port 8000, access to the setup page would
require the following URL to be entered; http://192.168.1.2:8000/setup.html.
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