
STM-4D Installation and Operation Manual Rev B
7
In other cases, such as the daisy-chain connection of multiple temperature or humidity sensors,
a straight-through cable is required. In this type of cable, pin 1 at one end of the cable connects
to pin 1 at the far end, pin 2 connects to pin 2, and so forth, as shown below:
Straight-through Wiring
The Burk 25’ SENSOR CABLE – DAISY CHAIN and RJ12 SPLITTER each use straight-through
wiring.
Daisy-Chain Connection of Digital Sensors
Multiple digital temperature sensors can be connected to ARC Solo using a daisy-chain
arrangement. This can be accomplished by first plugging one RJ12 SPLITTER into each TEMP-
INDOOR as shown below:
Plug one RJ12 Splitter into each Temp-Indoor Sensor
Sensor Cable
– Daisy Chain RJ12 Splitter