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Circon - 300 Series  

UHC-320 Fully Programmable Controller

Secondary Control Units
Date Last Saved: 4/13/2005 2:20:10 PM

Product Name(s): UHC-320 Fully Programmable Controller
Product Description: 13 points: 6 universal inputs, 7 universal outputs Fully programmable with Circon BASIC PID loop control, alarming, trending and scheduling Onboard battery-backed real-time clock I/O and control blocks fully configurable with LNS plug-ins
Product Application(s): Multi-purpose, provides control for: - Packaged air handling units - Rooftop units with economizer - Fan Coil Units - Heat Pumps - Unit Ventilators - Custom HVAC Design
Point Quantity Characteristics
Analog Input (AI): N.A.
Digital Input (DI): N.A.
Universal Input (AI or DI): 6 10k Thermistor
1k RTD
0-10 VDC
4-20 mA
Dry Contact
Analog Output (AO): N.A.
Digital Output (DO): N.A.
Universal Output (UO): 7 0-10 VDC
4-20 mA
Control Unit Model #:AIDIUIDOAOUOOther
UHC-320 6 7
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
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? 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)
(1) - Echelon Free Topology Transceiver (FTT-10A) 78 kbps
External Communication Ports, Speeds and Access Devices (1) - audio jack to Laptop/PC @ 78 kbps LonTalk
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)
Zone-Based Interface Access Information Not Provided
Zone Interface Hardware
Zone-Mounted touchpad (thermostat or stand-alone display)
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)
Microprocessor(s) Neuron 3150 10 MHz
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
Clock Synchronization One controller is defined during system configuration/setup as the reference timepiece that others synchronize to. Could be controller of this type
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? Yes
Battery Type(s) Lithium
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? 726 allocated by user over the configured trend logs.
Up to 10 individual trend logs can be configured (10 different sets of trend values)
What is the controllers role in trending? Controller captures trend data samples according to user configuration and saves data in internal trend log
Can controller be programmed to 'push' data to archive or are trends 'pulled' from controller? Pulled from controller by trend log viewer plug-in and by Circon's HMI Visual Indicator 3
When full, does controller automatically send up trend data, overwrite data, or stop logging data? Overwrite oldest data
Programming Method(s) Two methods of programming:
1. Template-based form of programming. Configuration performed on laptop/PC running LNS network management tool and the device-specific configuration LNS plug-in supplied by Circon

2. Line code programming using Circon Basic. Circon BASIC Compiler software provides Windows-based application for editing, compiling and downloading program.
Resident vs Non-Resident Program Execution All program execution is controller 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.)
Other PID, trending, alarming, scheduling
Additional Energy Management functions are resident at SI
Additional Programming Functions
DDC Loops (P, PI, PID) 5 individually configurable PID loops
Automatic PID Tuning Feature No
Automatical-Dial Alarm Support Yes, in conjunction with Circon SMC-300 Site Management Controller
Does controller perform multiple retries and buffer/store alarm until connection is made? Yes. Controller monitors up to 6 points for configurable alarm conditions. Configuration performed by LNS plug-in software.
Are multiple destinations possible? Yes, in conjunction with Circon SMC-300 Site Management Controller which can be configured.
Upon controller power loss or hardware failure:
Are network communications affected? No
Is loss recognized on/by the network and alarm reported? Yes, in conjunction with SMC-300
DO and AO response?
Outputs fail to a user pre-specified position
Outputs fail to a normal (unpowered) position
Outputs fail to last position
Volatile memory functions?
Retained for life of backup battery
Upon restoration of power does the controller:
Auto-reboot without operator intervention? Yes
Automatically reset/synchronize the clock? Yes
Update all monitored functions? Yes
Generate an alarm if backup battery is dead? No
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.)
Does network automatically reconfigure upon restoration? Yes, network variable bindings
Does network store 'loss of communications' alarm with time of event? Yes, in conjunction with SMC-300
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 PVC and metal(1.9" X 5" X 9")
Mounting with DIN rail
Power Supply Required
Voltage 24 VAC or 24 VDC
External transformer required
VA 40
Surge Protection 2.5 Amp slow-blow fuse (Bussman GMD-2.5A, Little fuse 23902.5A)
Underwriters Laboratories UL 916 certification for Energy Management Equipment
FCC Part 15, Part J, Class A of the FCC rules for Radio Frequency Devices
CE Yes
LonMark Certified
Yes LonMark 3.3
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Not submitted for testing
Information not provided