DDC Online direct digital controls
Distech Controls - Easycontrols  


Secondary Control Units
EC-8, EC-12, and EC-RTU
Date Last Saved: 5/27/2005 8:05:21 AM

Product Name(s): EC-8A;EC-8B;EC-8C;EC-12A;EC-12B;EC-12C;EC-RTU
Product Description: The Easycontrols EC-8 Series, EC-12 Series and EC-RTU are microprocessor based controllers designed to control various HVAC applications. These controllers use the LonWorks communication protcol and can be programmed through any LNS compliant software.
Product Application(s): The EC-8 and EC-12 controllers are designed for multistage air handling units, chillers, boilers, lighting systems, and refrigeration systems. The EC-RTU is designed to manage different types of rooftop units with one or multiple heating/cooling stages.
Point Quantity Characteristics
Analog Input (AI): N.A.
Digital Input (DI): N.A.
Universal Input (AI or DI): See Below Dry contact
0-10 VDC
4-20 mA
Analog Output (AO): See Below 0-10 VDC linear
0-12 VDC Digital
Digital Output (DO): See Below Relay (14-24 VDC @ 5 Amp)
Universal Output (UO):
Control Unit Model #:AIDIUIDOAOUOOther
EC-8A 8 8
EC-8B 8 4 4
EC-8C 8 8
EC-12A 12 12
EC-12B 12 6 6
EC-12C 12 12
EC-RTU 8 6 2
A/D Converter Resolution
8 bit
10 bit
12 bit
16 bit
D/A Converter Resolution
6 bit
8 bit
10 bit
No Analog Output
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
Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
(1) LonTalk TP/FT-10 @ 78 Kbps
External Communication Ports, Speeds and Access Devices Information not provided
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 None. But see the EC-Display V-2 Product detail. (Can interface with up to 250 variables)
Zone Interface Hardware
Zone-Mounted touchpad (thermostat or stand-alone display)
HID (proprietary device)
PDA (3rd party HID, with software)
Other Information not provided.
*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 - User can syncronize the clock through the LNS Plug-in.
- The syncronization can be done automatically with a network variable.
Volatile Memory (RAM) Capacity 8k bytes
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? No (note: All parameters are saved in non volatile flash memory)
Battery Type(s) CR2032 Lithium Battery (for clock only)
Battery Life 75 years
Backup Battery Operating Time 15 years
Non-Volatile Memory Capacity (EEPROM/Flash)* 64K (application)
128K (Storage)
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? 12,000 events in the trend log
What is the controllers role in trending? The controller gathers and stores data.
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? If controller trend data buffer is full, the last data is overwritten by the new one.
Programming Method(s) Through any LNS compliant software with the Distech Free Programming Plug-in
Resident vs Non-Resident Program Execution Information not provided
Resident/Supervisory. This controller supervises the scheduling of other controllers.
Resident/Stand Alone. This controller contains its own schedule. 4 scheduler object
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 Library of all above available
Additional Energy Management functions are resident at SI
Additional Programming Functions
DDC Loops (P, PI, PID) PID
Automatic PID Tuning Feature No
Automatical-Dial Alarm Support No
Does controller perform multiple retries and buffer/store alarm until connection is made? No auto-dial alarm
Are multiple destinations possible? No auto-dial alarm
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
Volatile memory functions?
Retained for life of backup battery Time only
Other Everything is in flash
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? 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.)
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 Metal Enclosure (18 awg)
Power Supply Required
Voltage 24 VAC/VDC +/- 15%, 50/60 Hz
VA 5 VA Typical
15 VA Maximal
Surge Protection 5 Amp removable fuse
Underwriters Laboratories Yes
CE Pending
LonMark Certified
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Not submitted for testing
Information not provided