AMX ViewStat - Manual (Page 42)

Support Module Installation and Wiring
36 ViewStat Communicating Thermostat
DIP switches 1 and 2: Address (1-4)
The following diagram shows how to set the top two address DIP switches. Each support module must have its
own address (1-4).
DIP switch 3: Temperature Sensor 1
Each support module has two sensors: Sensor 1 and Sensor 2. Determine whether you want the Sensor 1 input
to monitor or control temperature. If DIP switch number 3 is in the "off " position, it will monitor the
temperature.
If DIP switch 3 is set to the "on" position, it will use the Sensor 1 temperature to control the thermostat. The
sensor control temperature will be displayed on the thermostat. If multiple sensors are daisy chained together,
all of the sensors set to control will be averaged and the average temperature will be displayed on the
thermostat.
Dip switch 4: Temperature Sensor 2 (VST-TTM support module only)
Sensor 2 is for an external flush-mount or outdoor/duct temperature sensor for the VST-TTM support module.
Determine whether you want the Sensor 2 input to monitor or control temperature. If DIP switch number 4 is
in the "off " position, it will monitor the temperature.
If DIP switch 4 is set to the "on" position, it will use the reported temperature to control the thermostat. The
sensor control temperature will be displayed on the thermostat. If multiple support modules are daisy chained
together, all of the sensors set to control will be averaged and the average temperature will be displayed on the
thermostat.
Dip switch 4: Humidity Sensor 2 (VST-TRH support module only)
Sensor 2 is for an onboard humidity sensor for the VST-TRH support module.
Determine whether you want the Sensor 2 input to monitor or control humidity. If DIP switch number 4 is in
the "off" position, it will monitor the humidity level (%).
If DIP switch 4 is set to the "on" position, it will control the humidity level and the value will be displayed on
the thermostat (with a % sign to indicate humidity). Up to 4 support modules can be daisy chained together.
All humidity sensors that are set to "Control" mode will be averaged and the average humidity will be
displayed on the thermostat.
DIP switch 6: T1/T2 or Onboard Sensor
Determine whether you want the Sensor 1 input to use the temperature sensed by the onboard thermistor or to
use the input from a remote sensor (i.e. flush mount sensor or duct/outdoor sensor). If DIP switch number 6 is
in the "off" position it will use the remote sensor inputs (T1/T2). If the DIP switch is in the "on" position, it
will use the temperature input from the onboard thermistor. This option only exists for the Sensor 1 input and
can still be configured to monitor or control.
FIG. 31 Setting the top two address switches (switches 1 and 2)
ADDRESS 1
ADDRESS 2
ADDRESS 3
ADDRESS 4
If the support module is set to Address 1 and the Sensor 1 input is set to "monitor",
then the monitored temperature will be displayed as the remote temperature in the
lower left hand corner of the thermostat. Otherwise, the monitored value will only be
available through the home automation system.
If any of the remaining temperature sensors are also set to "control", the temperature
control averaging will override the humidity control averaging and humidity control
values will be ignored by the thermostat. To ensure that the thermostat recognizes
humidity control values, make sure that all temperature sensors (for this thermostat)
are set to the "Monitor" mode.