Revision 3.1
WebRelay
TM
Users Manual
5-pin connector pinout:
Pin
Description
V IN+
Power supply input +. Connect to the positive side of the
appropriate power supply. DO NOT EXCEED MAXIMUM
POWER SUPPLY VOLTAGE.
Model X-WR-1R12-1I5-5
5VDC Power supply
Model X-WR-1R12-1I5-I or X-WR-1R12-1I24-I
9-28VDC Power supply
Model X-WR-1R12-1I5-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.
V IN-
Power supply input -. Connect to the negative side of the
appropriate power supply.
INPUT -
Digital Input - : This is the negative side of the optically-isolated
input. Internally, this terminal connects directly to an opto-
isolator.
INPUT +
Digital Input +: This is the positive side of the optically-isolated
input. Internally, this terminal connects to an opto-isolator
through a resistor (resistor is internal).
+5V OUT
+5VDC Out. This voltage is provided as a convenient voltage
source for the optically-isolated input (only for 3-12V input
models). This is used, for example, when dry contacts (such as a
switch) are needed to control the input state. This can be used by
connecting the INPUT– directly to VIN-, and then connecting
this terminal to INPUT+ through a switch. Do not use this output
for other purposes.
2.2.1 Power Supply Connection
WebRelay
TM
requires power for its internal logic circuits. Connect appropriate power supply to the Vin+
and Vin- terminals. Alternatively, WebRelay
TM
units with the Power Over Ethernet option may be powered
through the Ethernet connection instead of using an external power supply.
Multiple WebRelay
TM
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
TM
units with the Power Over Ethernet option may be connected to an 802.3af compliant Ethernet
port instead of connecting to an external power supply. In this case, WebRelay
TM
is powered through the
network port. In 802.3af compliant networks, 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
TM
. 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 VOLTAGE TO BOTH THE DATA LINES AND THE SPARE LINES.
Xytronix Research & Design, Inc.
page 14