How does the Deluxe Telephone Controller (CT241) connect to the devices its controlling?
By example we will explain how to connect the Deluxe Telephone Controller to the 7-day Programmable Thermostat (TH141). Page 8 of the CT241 manual shows the connection to external devices. Note the L&N signal connections shown at the bottom left of the diagram. Those represent the signal voltage required to activate the TH141 vacation mode. A 12 VDC power adapter (purchased separately) plugs into a wall outlet and provides the 12 VDC signal. The positive lead from the adapter is the L signal (line voltage), and the N lead is the common or negative connection. Note page 22 in the TH141 Thermostat manual section 6.2. The switch shown in this simple diagram represents a relay in the CT241. You will connect the L lead from the power adapter to a NO (normally open) contact of a relay output on the CT241. The other contact on the CT241 relay connects to the X terminal on the TH141 thermostat. The N lead from the power adapter connects to the C terminal on the thermostat via the common (negat
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