Revision 3.1
WebRelay
TM
Users Manual
1.4.1 Single WebRelay
TM
Device (IP Network Control Only)
The illustration below shows a simple example of using WebRelay
TM
to control a device over an IP
network. The device to be controlled is wired in series with the relay contacts. Note that a fuse or circuit
breaker is shown to limit current overload. This configuration is used for control of a device using a web
browser or a control script/application running on a computer.
1.4.2 Single WebRelay
TM
Device (Voltage and/or IP Network Control
)
This configuration offers both network and local control. In the example, the light shown on the right can
be controlled locally using a mechanical switch, or remotely over the IP network. The mechanical switch
controls a 5 volt signal that is applied to the optically-isolated input. Each time the 5 volt signal changes
(turns on or off), WebRelay
TM
changes the state of the relay.
Xytronix Research & Design, Inc.
page 7
Computer, PLC, or Automation Controller
IP
Network
WebRelay
COM
NO
Power Supply
(Powers WebRelay)
(5VDC or 9-28VDC)
+5V
D
C
GN
D
Power Source
(For device to be controlled)
Device to be
Controlled
Fuse or
Circuit Breaker
Vin+
Vin-
Computer, PLC, or Controller
IP
Network
WebRelay
COM
NO
11
1
Power Supply
(Powers WebRelay)
(5VDC or 9-28VDC)
+5
V
D
C
Power Source
(For device to be controlled)
Device to be
Controlled
Fuse or
Circuit Breaker
Vin+
Vin-
Switch (or sensor)
for Local Control
In-
In
+
+5
V
Ou
t
