Wiring Connections - Systems Controls & Instruments CEM-24 Series Owner's Manual

3. Wiring Connections

3.1 Phone line - wiring diagram.
The CEM-24 thermostat has a telephone line connection, exactly like an answering
machine or a modem, and is connected in the same way.
The thermostat has 2 telephone line outputs (TEL,TEL), where polarity is irrelevant.
Connection to
a regular
telephone jack
Connection to a
DSL micro-filter
telephone jack
(wall mounted)
normal telephone extension
(not supplied with thermostat)
DSL PHONE
Micro-filter
connected to a
telephone jack
(wall mounted)
normal telephone extension
DSL Internet
(not supplied with thermostat)
low voltage wires
(not supplied
with thermostat)
J2
J3
phone jack to wires converter
(not supplied)
low voltage wires
(not supplied
with thermostat)
J2
J3
phone jack to wires converter
(not supplied)
back of
thermostat
back of
thermostat
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