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TAC Xenta 121

Secondary Control Units
TAC Xenta 121
Date Last Saved: 6/30/2011 2:42:25 PM

Product Name(s): TAC Xenta 121
Product Description: The TAC Xenta 121 is a secondary programmable controller. The controller is a LonMark compliant device aimed at communicating on a LonTalk TP/FT-10 channel. It is able to operate both as a stand alone device and as part of a system.
Product Application(s): The TAC Xenta 121 is intended for heat pumps with or withour re-heat. It can be configured for use with 1, 2, or 3 stage compressor heat pumps and for a multitude of re-heat types. The TAC Xenta 121 is also intended for both 2-pipe and 4-pipe fan coil unit applications, with or without re-heat. It can be configured for use with a multitude of valve actuator types, such as on/off, multistage, increse/decrease, PWM, etc. The TAC Xenta 121 controller has different types of fan control functions, including on/off delays, boosting, and conditioning.
Point Quantity Characteristics
Analog Input (AI): 3 2 Thermistor - 1.8 kohm, 1 pot. meter - linear 10 kohm.
Digital Input (DI): 3
Universal Input (AI or DI): 1 Thermistor or digital
Analog Output (AO): 1 0-10 V, analog or LED
Digital Output (DO): 4 Triac outputs or relay outputs.
Universal Output (UO):
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.
Both AO and DO
DO Only
Other (Information not provided)
Indicating status LED on each output?
AO and DO
AO Only
DO Only
Other (Information not provided)
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 N.A.
Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
LonTalk TP/FT-10 @ 78kbps (101 series has only 1 communication port)
External Communication Ports, Speeds and Access Devices N.A.
Additional Information (Optional) N.A.
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)
Other N.A.
Zone-Based Interface Access Set-up is done using the programming tool TAC ZBuilder, which can be run stand-alone or as a device plug-in.
Zone Interface Hardware
Zone-Mounted touchpad (thermostat or stand-alone display)
HID (proprietary device) TAC ZBuilder
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)
Other N.A.
Microprocessor(s) Neuron 3150 @ 10 MHz
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
Other (Information not provided)
Clock Synchronization All outputs configured as inc/dec outputs will have a cyclic resync interval of 18 hours. Resync can also be initiated via nvi-DOResync.
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
Others (Information not provided)
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
Other (Information not provided)
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? (Information not provided)
How many total trend values can be stored? (Information not provided)
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) Set-up is done using TAC ZBuilder.
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.
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 (Information not provided)
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? No
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? (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? 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? (Information not provided)
Control Enclosure ABS/PC Plastic with an enclosure rating of IP 30.
Power Supply Required Yes
Voltage 24 V AC +/- 20%, 50-60 Hz
VA Varies based on output, max. 81 VA
Surge Protection (Information not provided)
Underwriters Laboratories UL 916
FCC (Information not provided)
CE EN 610000-6-1
LonMark Certified
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Not submitted for testing
Information not provided