2
Comfort ControllerI/O Module (PCB2) — This
input/output module is factory installed in the 50XJ unit and
allows additional field points (8 inputs and 8 outputs): VFD
(variable frequency drive) Bypass, VAV Terminals Control,
BuildingVentilation, and Heating Interlock.
Comfort ControllerI/O Module (PCB3) — This
accessorycontrol input/output module can be ordered separate-
ly and field-installed in the 50XJ unit. This module allows the
addition of the following field-installed sensors: Tower Sump
Temperature Sensor, Leaving Water Temperature Sensor,
Building Pressure Sensor, CO2Sensor, Indoor Relative
HumiditySensor, and Outdoor Temperature Sensor.
The accessory I/O module provides the following control
outputs( relays): 4-stage heat control, water pump requ est, tower
request,modulating exhaust fan, and external dehumidification.
Local Interface Display— The Local Inte rface Display
(LID)is m ounted on the front of the 50BV,XJunits. A number
of user-adjustable features are entered/changed using the
display keypad. These features described in detail in the Using
theLocal Interfac eD isplay section of this manual.
PCB Addresses — Switch 1 (SW1) is used to set each
controller’saddress. Individual DIP switches oneach board are
used toset theaddresses for individual hardware points. PCB1
switches are factory-set for hardware points 1-15, PCB2 DIP
switches are set for points 17-32, and PCB3 for points 33-48.
For more information, refer to Table 1 and the Optional and
Field-InstalledAccessory Sensors/Devices section.
Control ModuleCom munication— When power is
applied to the OMNIZONE™ System Control panel, the red
LED (light-emitting diode) on the top front of the processor
modulewill flash at a rapid pa ce (about twice a second) for the
first 30 to 60 seconds. See Fig. 1. This rapid flash will then be
replacedby a slower pacedflash (about once per second).
The green LED below the red LED will start flashing. This
LEDindicates input/output communications for accessory input
outputmodules and the LID.
Theyellow LED (the third LED from the bottom of the con-
troller [PCB1]) will flash when the controller is broadcasting
CCNmessages to a laptop or other computer.