Xytronix Research & Design WebRelay-10 X-WR-10R12-I User Manual page 14

Installation and Setup
Temperature/Humidity Sensor Connection (WebRelay-10 Plus™ only)
Temperature and/or humidity sensors can be used for monitoring environmental conditions. The digital
sensors use a one-wire data bus, which allows up to eight sensors to share the same terminals (+5V,
Ground, Data). Every sensor on the one-wire bus is assigned a unique serial number when it is
manufactured. That number is used to address the device during communication.
The sensors have three wires; the wire color is show in the table below.
Figure 2.2f - Temperature Sensor
Multiple sensors can be connected in two ways, directly connected to the unit (star topology) or "daisy
chained" (linear topology) as shown in Figure 2.2g.
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Figure 2.2e - Input Connector
WebRelay-10 Users Manual
Sensor Wire Color Connection
Red Vout
Black Gnd
Blue (or White) Data
Xytronix Research & Design, Inc.