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2.5 Connecting the EMS
Thermostat and Additional
Sensors
When connected to the VPM5580TC, an EMS
Thermostat allows users to detect and control the
indoor temperature of the premises locally or
remotely from any touchtone telephone. The
VPM5580TC can announce either temperature
(exterior temperature only if an EMS-OTS module
is attached and enabled). The LCD5500Z can also
display the temperature(s) and allows the user to
access temperature controls.
Figure 3 illustrates how the EMS thermostat
connects to the VPM5580TC. Refer to the EMS
thermostat Installation Sheet for more details.
Figure 3: Connecting the VPM5580TC to an EMS
thermostat.
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Connecting Indoor Sensors (EMS-ITS)
The thermostat has its own temperature sensor
built in. You can install additional indoor sensors
for more accurate temperature control. Use
EMS-ITS sensors to measure temperature at a
remote location from the thermostat (where the
thermostat's own sensor is disabled), or for
temperature averaging in large rooms or between
different rooms.
Up to 6 EMS-ITS sensors may be installed. Connect
the sensors to the thermostat as shown in Figure 4.
Figure 4: Connecting thermostat to additional
sensors.
The maximum distance sensors may be installed
from the thermostat is 90 m (300'). Refer to the
EMS-ITS Installation Sheet for more details.
Connecting the EMS-OTS (Outdoor Sensor)
The EMS-OTS senses outdoor air temperature via
an exterior wired probe. This temperature can be
displayed on the thermostat but does not affect
thermostat function.
Only one EMS-OTS module may be installed per
thermostat. Connect the EMS-OTS to the thermostat
in series the same way as an EMS-ITS module (see
Figure 4). Insert the EMS-OTS at any point in a
chain with other sensors. Refer to the EMS-OTS
Installation Sheet for more details.
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