25
PRODIGY
®
- DIGITAL VAV DIFFUSERS
NATIVE BACNET NETWORK INTERFACE OPTIONAL ACCESSORY
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®
- Manual
BACnet Module
A Native BACnet communication interface is an option
available for the Prodigy diffusers. Networking allows building
systems, including the HVAC system to share information
with each other such as set points, room temperatures, room
loads and much more. Using the ASHRAE network standard
BACnet allows the Prodigy to communicate with other BACnet
devices. This allows interoperability between different devices
even if they are made by different manufacturers.
The BACnet network interface uses the BACnet network type
MS/TP (Master Slave Token Passing) which uses 2 wires in a
daisy chain configuration. This network type is based RS-485
physical layer and is very robust in industrial environments
while being economical enough to be implemented on each
device.
The network connection between Prodigy
®
(with BACnet
option) diffusers is done with the included plenum rated
network cable. No tools needed!
Connecting the Prodigy
®
diffusers with the BACnet interface
option is very simple and efficient. Dual RJ-45 jacks on each
diffuser allow daisy chaining each device without splitters or
any tools. Included with each Prodigy diffuser is a 35 foot
plenum rated network cable to simplify installation in the field.
Local addresses can be set at each Prodigy® diffuser using
the on-board DIP switches. The media access control (MAC)
address range is 1-99. Each device on the network segment
must have a unique address, otherwise communication errors
will occur.
To show proper data exchange TX (transmit) and RX (receive)
LEDs indicate when data is being sent and received. This
provides a visual check of how the network is performing.
For example if the RX LED is not blinking this could indicate
a cable is unplugged at the other end, or the address is
incorrect.
Standard baud rates for the BACnet MS/TP network are 9600,
19200, 38400 and 76800. All devices on the network segment
must be set to communicate at the same speed. Otherwise
communication errors will occur.
Prodigy
®
Control Variables
There are several control variables that can be monitored and/or
adjusted via the network. These include, but are not limited to:
• Room Temperature
• Room Set point
• Supply Air Temperature
• Supply Air Temperature switch over points
(hot/cold/neutral temperatures)
• Inlet Size
• Reheat Type
• Damper Position
• Damper Target
• Model Type
• Ping (Sounds the Prodigy beeper helping you locate the unit)
• Day/Night Mode
• Cooling/Heating Load (100% auto + 100%)
These variables allow the user to determine the current status
of a zone. This information can also be relayed to a main
controller allowing it to calculate the total heating or cooling
loads.
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