Revision 3.1
WebRelay
TM
Users Manual
Section 1: Introduction
WebRelay
TM
is an electro-mechanical relay 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
TM
using a web browser or a custom application. Computers, PLCs, or automation controllers may control
and monitor WebRelay
TM
without user intervention. This works by sending text commands over the network and
reading XML status pages from WebRelay
TM
, or by using Modbus/TCP protocol. WebRelay
TM
can also be operated
by using the optically isolated input. The optically isolated input can be configured to turn the relay on/off, pulse the
relay, toggle the relay, latch the relay (for alarming), etc. The input can also be used to control a relay at a remote
location or to simply monitor the status of a digital signal.
WebRelay
TM
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. It can also be used to monitor switches, sensors, and
control voltages.
In addition, WebRelay
TM
is designed to function as a high-end reboot controller and offers many reboot options. It
can be used to remotely reboot servers, computers, satellite modems, and other devices over the Internet, or it can be
configured to automatically reboot devices when they fail to respond to pings that are sent from WebRelay
TM
. There
are three ways that WebRelay
TM
can be wired to a device for reboot. First, WebRelay
TM
can be wired in series with
the power source of the device and simply switch the power on and off. Second, WebRelay
TM
can be wired in parallel
with the power switch of the device. This is useful for devices that will not automatically start operating when power
is applied. These devices require a user to press a power switch before the device will boot. The third option is to
connect WebRelay
TM
to the reset circuit of a device. In this configuration, WebRelay
TM
does not power down the
device, but simply causes the device to reset. All three reboot methods have different requirements in physical
connection and relay timing.
1.1 Features
WebRelay
TM
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.
•
12 Amp/120VAC relay for direct connection to load.
•
Removable terminal connectors (included) simplifies wiring and service.
•
Custom applications can control WebRelay
TM
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.
•
Built-in automatic reboot controller.
•
Optically-isolated input can be used for status monitoring, local relay control, or remote relay control.
•
On/Off or pulse mode.
•
Reboot Counter (XML readable only).
Xytronix Research & Design, Inc.
page 5