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emonPi / emonTx RJ45 Expander for DS18B20 & Pulse Sensors

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£11.70 (inc VAT) £9.75 (exc VAT)
20.00 Grams
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A 4-port RJ45 breakout board to allow multiple one-wire DS18B20 temperature sensors on RJ45 and optical pulse sensor to be easily wired to a single RJ45 bus for easy connection to the emonPi or emonTx.


The emonPi / emonTx can support up to six temperature sensors and one Optical Pulse Sensor on a single bus. When using multiple temperature sensors and or an optical pulse sensor with the emonTx we recommend powering via 5V USB rather than AC-AC adapter due to increased power requirement. An AC-AC adapter can still be used to provide an AC voltage reference. 


An RJ45 coupler can be used to extend RJ45 sensor cables.




The RJ45 pin connections:

1, 3, 5 - all connected together in common across all sockets (GND)
2,4,6,7,8 - all connected separately in parallel across all sockets




Optical Pulse Sensor Pinout

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