DDC Online direct digital controls
Computrols - CBAS  

DDC Controllers

Primary Control Unit
Computrols DDC Controllers
Date Last Saved: 5/22/2007 11:23:36 AM

Product Name(s): DDC Controllers
Product Description: Computrols DDC controllers directly connect HVAC equipment to the Internet. Through an on-board web server and a static IP address, these DDC controllers eliminate the need for a communication infrastructure.
Product Application(s): Computrols DDC controllers are designed for both chilled and hot water plants, air handling units, direct expansion (DX) systems, and lighting control.
Point Quantity Characteristics
Analog Input (AI): N.A.
Digital Input (DI): N.A.
Universal Input (AI or DI): N.A.
Analog Output (AO): N.A.
Digital Output (DO): N.A.
Universal Output (UO):
Other:
Control Unit Model #:AIDIUIDOAOUOOther
8X 8
16X 16
32X 32
64X 64
A/D Converter Resolution
8 bit
10 bit
12 bit
16 bit
Other Information not provided
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.
No
Both AO and DO
DO Only
Other
Indicating status LED on each output?
No
AO and DO
AO Only
DO Only
Other
Integral Flow Sensor? N.A.
Integral Damper Actuator? N.A.
Can controller accept occupant override from thermostat? N.A.
Can controller accept occupancy sensor input? N.A.
Expander Boards
Expansion Device Model #AIDIUIDOAOUOOther
Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
(1)-RJ-45 Ethernet TCP/IP
External Communication Ports, Speeds and Access Devices (2)-EIA 485 serial protocol, VAV controllers
(1)-EIA 232 local hand held terminal port.
Additional Information (Optional) IP addressable, DHCP enabled, onboard web server.
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
Other
Controller Access Devices
Laptop/PC
Local Display Panel (controller-mounted)
Local Display Panel (zone-mounted)
Handheld Interface Device (proprietary device)
PDA (3rd-Party HID)
Zone-Based port (details below)
Other
Zone-Based Interface Access The HHT connects to the controller via EIA 232 port.
Zone Interface Hardware
Zone-Mounted touchpad (thermostat or stand-alone display)
HID (proprietary device)
PDA (3rd party HID, with software)
Laptop/PC
none
Other
*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
Programs/Logic
O&M SupportTAB/Cx Support
Laptop/PC
Local Display Panel (controller-mounted)
Local Display Panel (zone-mounted)
Handheld Interface Device (proprietary device)
PDA (3rd-Party HID)
Zone-Based port (details below)
Other
Microprocessor(s) Intel 386 25MHZ
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
None
Other Information not provided
Clock Synchronization Information not provided
Volatile Memory (RAM) Capacity 1 MB
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
Others
Is Volatile Memory Supported By Battery? Yes
Battery Type(s) Information not provided
Battery Life Information not provided
Backup Battery Operating Time 10 years of data retention
Non-Volatile Memory Capacity (EEPROM/Flash)* 3 MB Flash
Non-Volatile Memory Uses
Data / Trends / Alarms / Calculation Storage
Configuration / Parameter Storage
Control Programming Storage
Controller Operating System
Other Information not provided
Additional Information 128 MB disk chip storage
* 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? No
How many total trend values can be stored? N.A.
What is the controllers role in trending? N.A.
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? N.A.
Programming Method(s) Configuration is done through web browser as the user is guided through the initial setup.
Resident vs Non-Resident Program Execution Resident
Scheduling
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.
Other Information not provided
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
Others
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.)
Other Information not provided
Additional Energy Management functions are resident at SI
Additional Programming Functions
DDC Loops (P, PI, PID) Information not provided
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
Volatile memory functions?
Lost
Retained for life of backup battery
Other
Upon restoration of power does the controller:
Auto-reboot without operator intervention? Information not provided
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? Information not provided
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? Information not provided
Others?
 
Control Enclosure Not provided with controller
Power Supply Required
Voltage 24 VAC 50/60 HZ
VA 32- 75 VA (with all outputs active)
16- 10 VA (with all outputs active)
8- 40 VA (with all outputs active)
Surge Protection 250 VAC on each point terminal
Underwriters Laboratories Applied for:
UL 916 Energy Management
UL 3121-1 Process Controls
FCC Applied for:
Part 15
CE Applied for:
LonMark Certified
Yes
No
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Yes
No
Not submitted for testing
Information not provided
Other