Terminal Box Controller; Fan Coil Unit Controller; Heat Pump Controller
Secondary Control Units
BACnet Terminal Equipment Controller (BTEC)
Date Last Saved: 12/13/2007 8:59:48 AM
Product Name(s):
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Terminal Box Controller; Fan Coil Unit Controller; Heat Pump Controller
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Product Description:
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The BTEC controllers can operate stand-alone or can be networked to perform HVAC control, monitoring, and energy management functions. The BTEC controllers are designed to communicate with the Siemens Building Technologies APOGEE System via BACnet MS/TP.
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Product Application(s):
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Terminal Box Controller - designed for pressure independent VAV air terminal applications with or without reheat options.
Fan Coil Unit Controller
Heat Pump Controller - designed for water source heat pumps with ventilation of mixed air control and air to air heat pumps with ventilation and mixed air control. Multiple stage configuration.
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Point Quantity
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Characteristics
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Analog Input (AI):
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See Below
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Room Temperature Sensor Setpoint Adjustment Auxillary Temperature Sensor Velocity Sensor (VAV controller only)
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Digital Input (DI):
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See Below
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Dry contacts
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Universal Input (AI or DI):
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N.A.
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Analog Output (AO):
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N.A.
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Digital Output (DO):
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See Below
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24 Vac optically isolated Solid State switches
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Universal Output (UO):
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Other:
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Control Unit Model #: | AI | DI | UI | DO | AO | UO | Other |
Terminal Box Controller 550-788A
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4
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2
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6
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Fan Coil Unit Controller 550-789A
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3
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2
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6
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Heat Pump Controller 550-790A
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3
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2
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8
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A/D Converter Resolution
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D/A Converter Resolution
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HOA switches provided on each output?
Note: These are also available as an add-on from 3rd party vendors.
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Indicating status LED on each output?
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Integral Flow Sensor?
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VAV controller has integral velocity sensor.
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Integral Damper Actuator?
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No.
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Can controller accept occupant override from thermostat?
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Yes, setpoint adjustment is an optional analog input.
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Can controller accept occupancy sensor input?
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Yes, occupancy sensor can be input to one of the DI dry contacts.
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Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
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(1) EIA-485 port for BACnet MS/TP @ 9.6 to 38.4 kbps
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External Communication Ports, Speeds and Access Devices
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(1) - EIA-232 laptop/PC communication ports with RJ-11 jack @ up to 38.4 kbps To: Zone-based port on thermostat (optional)
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Additional Information (Optional)
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Network Accessing Capabilities via Controller
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Controller Access Devices
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Zone-Based Interface Access
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Optional thermostats available with port to access controller via laptop.
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Zone Interface Hardware
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*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.
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Microprocessor(s)
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Motorola 68HS12
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Clock Type
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Clock Synchronization
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N.A.
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Volatile Memory (RAM) Capacity
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12 kb
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Volatile Memory (RAM) Uses
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Is Volatile Memory Supported By Battery?
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No
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Battery Type(s)
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N.A.
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Battery Life
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N.A.
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Backup Battery Operating Time
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N.A.
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Non-Volatile Memory Capacity (EEPROM/Flash)*
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256 kb EEPROM
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Non-Volatile Memory Uses
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Additional Information
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* 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.
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Can trend data be stored in this controller?
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No
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How many total trend values can be stored?
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N.A.
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What is the controllers role in trending?
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None. Trend point data is called by the SI and stored at the OWS.
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Can controller be programmed to 'push' data to archive or are trends 'pulled' from controller?
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When full, does controller automatically send up trend data, overwrite data, or stop logging data?
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N.A.
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Programming Method(s)
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Pre-existing programs ('applications') are configured using Voyager. Voyager is a Windoows-based program that allows users to communicate directly with any Terminal Equipment Controller to view, modify, or command point information. Initially, secondary control units must be configured locally, then address is kept in EEPROM allowing complete access and reconfiguration capability from workstation or portable terminals.
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Resident vs Non-Resident Program Execution
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Resident programming will allow control to function as stand-alone. Primary controllers or supervisory interface devices manage scheduling, trending, global control, and communication functions.
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Scheduling
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Resident Energy Management
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Specific Pre-Programmed Algorithms Available
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Additional Programming Functions
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A wide variety of configurable energy management features are available on the various BTECs (dependent on model and application).
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DDC Loops (P, PI, PID)
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PID
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Automatic PID Tuning Feature
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No
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Automatical-Dial Alarm Support
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No
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Does controller perform multiple retries and buffer/store alarm until connection is made?
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No
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Are multiple destinations possible?
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No
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Upon controller power loss or hardware failure:
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Are network communications affected?
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No
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Is loss recognized on/by the network and alarm reported?
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Yes
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DO and AO response?
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Volatile memory functions?
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Upon restoration of power does the controller:
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Auto-reboot without operator intervention?
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Yes.
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Automatically reset/synchronize the clock?
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No clock
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Update all monitored functions?
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Yes - update received from field panel - MBC/RBC, MEC, or FLNC (SI)
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Generate an alarm if backup battery is dead?
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N.A.
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Upon network or communications failure does controller:
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Continue to operate standalone?
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Yes
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Operate with last global settings or user-specified value?
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N.A.
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Do broken network segments continue to communicate within the remaining segment?
(Note: May depend on proper termination of segments for higher speed networks.)
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Yes, if configured as masters.
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Does network automatically reconfigure upon restoration?
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Yes
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Does network store 'loss of communications' alarm with time of event?
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Yes
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Additional Information (optional)
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Self Test Diagnostics
Does controller have internal self-test diagnostics to check:
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Processor failure?
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Yes
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Internal hardware failure?
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Yes
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Open/shortened sensor?
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Yes
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Others?
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Control Enclosure
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Controller is housed in a plastic case.
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Power Supply Required
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Voltage
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19.2 to 27.6 Vac at 50/60 Hz
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VA
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10 VA (plus 12 VA per DO)
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Surge Protection
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Yes.
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Underwriters Laboratories
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UL 916, PAZX cUL C22.2 No. 205-M1983, PAZX7
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FCC
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47 CFR Part 15
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CE
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Information not provided.
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LonMark Certified
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BACnet (BTL) Certified
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Other
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