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Secondary Control Units
Specific Application Controllers
Date Last Saved: 6/3/2010 5:42:07 PM

Product Name(s): BAC-7301;BAC-7301C;BAC-7302;BAC-7302C;BAC-7303;BAC-7303C;BAC-7401;BAC-7401C
Product Description: These controllers are native BACnet and fully programmable. They are designed for specific applications and can stand alone or communicate with other BACnet devices.
Product Application(s): BAC-7301 and BAC-7201C (Air Handling Units) BAC-7302 and BAC-7302C (Roof Top Units) BAC-7303 and BAC-7303C (Fan Coil Units) BAC-7401 and BAC-7401C (Heat Pump Units)
Point Quantity Characteristics
Analog Input (AI): N.A.
Digital Input (DI): N.A.
Universal Input (AI or DI): See Below Thermister
0-5 VDC
Pulse Counting
Analog Output (AO): N.A.
Digital Output (DO): N.A.
Universal Output (UO):
Control Unit Model #:AIDIUIDOAOUOOther
BAC-7301 4 3 1
BAC-7301C 4 3 1
BAC-7302 4 3 1
BAC-7302C 4 3 1
BAC-7303 4 2 2
BAC-7303C 4 2 2
BAC-7401 4 4
BAC-7401C 4 4
A/D Converter Resolution
8 bit
10 bit
12 bit
16 bit
D/A Converter Resolution
6 bit
8 bit
10 bit
No Analog Output
Other Information not provided.
HOA switches provided on each output?
Note: These are also available as an add-on from 3rd party vendors.
Both AO and DO
DO Only
Indicating status LED on each output?
AO and DO
AO Only
DO Only
Integral Flow Sensor? N.A.
Integral Damper Actuator? N.A.
Can controller accept occupant override from thermostat? Yes
Can controller accept occupancy sensor input? N.A.
Expander Boards N.A.
Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
(1) EIA-485 to BACnet/MSTP @ 76.8 kbps
External Communication Ports, Speeds and Access Devices (1)RJ-12 to NetSensor
Additional Information (Optional)
Network Accessing Capabilities via Controller
Access controller only
Access controller plus additional controllers on network segment / LAN
Access all controllers on system
No access available on this controller
Controller Access Devices
Local Display Panel (controller-mounted)
Local Display Panel (zone-mounted)
Handheld Interface Device (proprietary device)
PDA (3rd-Party HID)
Zone-Based port (details below) NetSensor
Zone-Based Interface Access (1) RJ-12 port
Zone Interface Hardware
Zone-Mounted touchpad (thermostat or stand-alone display) NetSensor
HID (proprietary device)
PDA (3rd party HID, with software)
*Note: This section covers the capabilities for accessing the controller or other parts of the network from the controller (i.e. 'bottom-up').
Standard access functionality is covered in the Architecture and Software sections.
**Does NOT include front-end OI functions. See vendor for specific functions available.
Functions Available Through Field Interface**:View ParamsChange ParamsChange
O&M SupportTAB/Cx Support
Local Display Panel (controller-mounted)
Local Display Panel (zone-mounted)
Handheld Interface Device (proprietary device)
PDA (3rd-Party HID)
Zone-Based port (details below) NetSensor
Microprocessor(s) Information not provided.
Clock Type
Powered, battery-backed backed up for 72 hours
Battery powered
Powered, no battery backing
Other Clock available only on models 7301C, 7302C, and 7401C
Clock Synchronization Information not provided.
Volatile Memory (RAM) Capacity Information not provided.
Volatile Memory (RAM) Uses
RAM use unrestricted
RAM use restricted as shown below
Information Not Provided
Program Execution / Calculation storage
Data / Trends / Alarms storage
Configuration / Parameter storage
Control Programming storage
Is Volatile Memory Supported By Battery? Information not provided
Battery Type(s) Information not provided
Battery Life Information not provided
Backup Battery Operating Time Information not provided
Non-Volatile Memory Capacity (EEPROM/Flash)* Information not provided
Non-Volatile Memory Uses
Data / Trends / Alarms / Calculation Storage
Configuration / Parameter Storage
Control Programming Storage
Controller Operating System
Additional Information
* Items in NV memory are not lost upon power or battery failure. Other types of NV memory such as EPROM, NOVROM, etc. do not directly impact system performance.
Can trend data be stored in this controller? Yes.
How many total trend values can be stored? 8 Trend Objects.
What is the controllers role in trending? Information not provided.
Can controller be programmed to 'push' data to archive or are trends 'pulled' from controller?
When full, does controller automatically send up trend data, overwrite data, or stop logging data? Information not provided.
Programming Method(s) Information not provided.
Resident vs Non-Resident Program Execution Resident
Resident/Supervisory. This controller supervises the scheduling of other controllers.
Resident/Stand Alone. This controller contains its own schedule.
Non-Resident. This controller is dependent upon another controller for its schedule.
None. This controller has no scheduling features.
Resident Energy Management
Energy management algorithms for this controller can be custom programmed
Pre-programmed/built-in algorithms available, and are fully editable using custom programming
Pre-Programmed/built-in with limited editing via template-based programming
Controller is not typically used for energy management functions
Specific Pre-Programmed Algorithms Available
None (custom programming only)
None (not applicable)
Optimal Start/Optimal Stop
Peak Demand Limiting/Load Shedding
Economizer (enthalpy, dry-bulb, CO2, modulating/2-position, etc.)
Additional Energy Management functions are resident at SI
Additional Programming Functions BAC-7301 and BAC-7301C have preprogrammed sequences for:
Air handler operation based on occupancy and night setback.
Economizer operation.

BAC-7302 and BAC-7302C have preprogrammed sequences for:
Fan, 2-staged heating, 2-staged cooling, and economizer

BAC-7303 and BAC-7303C have preprogrammed sequences for:
Proportional fan control, proportional chilled water valve control, 1 or 2 stage heat, and optional humidity control

BAC-7401 and BAC-7401C have preprogrammed sequences for:
Adjustments based on occupancy. Compressor, reversing valve, and fan operation. Auxiliary heat control.
DDC Loops (P, PI, PID) PID
Automatic PID Tuning Feature Information not provided.
Automatical-Dial Alarm Support Information not provided.
Does controller perform multiple retries and buffer/store alarm until connection is made? Information not provided.
Are multiple destinations possible? Information not provided.
Upon controller power loss or hardware failure:
Are network communications affected? Information not provided.
Is loss recognized on/by the network and alarm reported? Information not provided.
DO and AO response?
Outputs fail to a user pre-specified position
Outputs fail to a normal (unpowered) position
Outputs fail to last position
Other Information not provided.
Volatile memory functions?
Retained for life of backup battery
Other Information not provided.
Upon restoration of power does the controller:
Auto-reboot without operator intervention? Yes.
Automatically reset/synchronize the clock? Information not provided.
Update all monitored functions? Information not provided.
Generate an alarm if backup battery is dead? Information not provided.
Upon network or communications failure does controller:
Continue to operate standalone? Yes.
Operate with last global settings or user-specified value? N.A.
Do broken network segments continue to communicate within the remaining segment?
(Note: May depend on proper termination of segments for higher speed networks.)
Information not provided.
Does network automatically reconfigure upon restoration? Information not provided.
Does network store 'loss of communications' alarm with time of event? Information not provided.
Additional Information (optional)
Self Test Diagnostics
Does controller have internal self-test diagnostics to check:
Processor failure? Information not provided.
Internal hardware failure? Information not provided.
Open/shortened sensor? Informatoin not provided.
Control Enclosure Black flame retardant polymer, UL94-5V plenum rated
Power Supply Required
Voltage 24 VAC -15% / +20%
VA 25 VA Max
Surge Protection Information not provided.
Underwriters Laboratories UL 916 Energy Management Equipment
FCC FCC Class A, Part 15, Subpart B
CE Information not provided.
LonMark Certified
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Not submitted for testing
Information not provided