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Andover - Continuum  

Large Air Handling Unit/Plant Controller/ Router

Primary Control Unit
b4920
Date Last Saved: 3/24/2009 9:39:07 AM

Product Name(s): Large Air Handling Unit/Plant Controller/ Router
Product Description: Native BACnet controller communicating on an EIA-485 field bus as a Master device using MS/TP protocol.
Product Application(s): The b4920 is used for control of larger Air Handling Units, chillers, boilers, and other mechanical plant equipment. This unit is also a native BACnet router.
Point Quantity Characteristics
Analog Input (AI): N.A.
Digital Input (DI): N.A.
Universal Input (AI or DI): 16 0-10 VDC
Thermistor
Dry Contact
Pulse 4 Hz
0-20 mA
Analog Output (AO): 8 0-10 VDC
4-20mA
Digital Output (DO): 8 SPST Form C
Universal Output (UO):
Other:
A/D Converter Resolution
8 bit
10 bit
12 bit
16 bit
Other
D/A Converter Resolution
6 bit
8 bit
10 bit
No Analog Output
Other 0.1 V, 0.1 mA
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 Up to 2 XP expansion modules can be added to each. HOA switches are standard.
Expansion Device Model #AIDIUIDOAOUOOther
DI-8 8
DO-2 2
DO-4 4
AO-2 2
AO-4 4
Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
(1) EIA-485 BACnet MS/TP 9600, 76.8K baud
(1) 10/100 BaseT
External Communication Ports, Speeds and Access Devices Information not provided
Additional Information (Optional) 127 devices maximum on EIA-485
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 Smart Sensor
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) Motorola 32 bit Coldfire
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
None
Other
Clock Synchronization Information not provided.
Volatile Memory (RAM) Capacity 1 MB SRAM
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) Replaceable Lithium
Battery Life 5 yr
Backup Battery Operating Time Information not provided.
Non-Volatile Memory Capacity (EEPROM/Flash)* 2 MB Flash
Non-Volatile Memory Uses
Data / Trends / Alarms / Calculation Storage
Configuration / Parameter Storage
Control Programming Storage
Controller Operating System
Other
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? Supports 18 BACnet object types.
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? Information not provided
When full, does controller automatically send up trend data, overwrite data, or stop logging data? Information not provided.
Programming Method(s) Andover Controls Plain English programming language is used for scheduling, alarming, programming and data logging.
Network setup via embedded web interface
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
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
Additional Energy Management functions are resident at SI
Additional Programming Functions (Information not provided)
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 Information not provided
Volatile memory functions?
Lost
Retained for life of backup battery
Other Information not provided
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? Information not provided.
 
Control Enclosure Panel Mount
Power Supply Required Yes
Voltage 115/230 VAC +10%, -15%, 50/60Hz
VA 45
Surge Protection MOV protected, fused
Underwriters Laboratories 916
FCC CFR 47 Part 15
CE Yes
LonMark Certified
Yes
No
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Yes
No
Not submitted for testing
Information not provided
Other