DDC Online direct digital controls
Johnson Controls - Metasys Extended Architecture  

Network Automation Engine

Supervisory Interface Devices
Date Last Saved: 1/7/2008 1:09:31 PM

Product Name(s): Network Automation Engine
Product Description: The Network Automation Engine (NAE) is a Web enabled network controller that communicates using BACnet, LONTALK, and the N2. The NAE monitors and supervises HVAC equipment, lighting, security, and access control.
Product Application(s): The NAE is designed to monitor and control the following: HVAC units, chillers, boilers, lighting/electrical distribution, power generation/electrical equipment, security/fire detection.
Point Quantity Characteristics
Analog Input (AI): N.A. N.A.
Digital Input (DI): N.A. N.A.
Universal Input (AI or DI): N.A. N.A.
Analog Output (AO): N.A. N.A.
Digital Output (DO): N.A. N.A.
Universal Output (UO): N.A. N.A.
Other: N.A. N.A.
A/D Converter Resolution
D/A Converter Resolution
HOA switches provided on each output?
Note: These are also available as an add-on from 3rd party vendors.
Indicating status LED on each output?
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) IP over Ethernet @ 10/100 Mbs or BACnet/IP over Ethernet @ 10/100 Mbps
(2) Optomux (N2 BUS) @ 9600 Kbps over EIA 485
External Communication Ports, Speeds and Access Devices (2)-EIA 232
(2)-USB ports
(2)-EIA 485
(1)-10/100 Base-T
Additional Information (Optional) (1)-FTT 10 LONWORKS compatible port (optional)
(1)-RJ-11 (internal modem) @ 56 Kbaud (optional)
Network Accessing Capabilities via Controller
Controller Access Devices
Zone-Based Interface Access N.A.
Zone Interface Hardware
*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.
Microprocessor(s) 300 MHz Pentium
32 bit
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
Clock Synchronization Information not provided
Volatile Memory (RAM) Capacity 256 MB RAM
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) (1)Data protection battery- Rechargeable gel cell 12V 1.2A
(1)-Clock battery- on board cell
Battery Life 3-5 years- Data protection battery
10 years- Clock battery
Backup Battery Operating Time Sufficient time to save all data and properly shut down
Non-Volatile Memory Capacity (EEPROM/Flash)* 256 MB EEPROM
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? 500 records which include all points (limit 5000), extensions, graphics (background images), trend studies, schedules, and interlocks.
What is the controllers role in trending? Pulls in trend values.
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? Automatically sends trend data to ADS historical database. If no ADS is present in the system, the NAE will overwrite the data.
Programming Method(s) N.A.
Resident vs Non-Resident Program Execution N.A.
Resident Energy Management
Specific Pre-Programmed Algorithms Available
Additional Programming Functions N.A.
DDC Loops (P, PI, PID) N.A.
Automatic PID Tuning Feature N.A.
Automatical-Dial Alarm Support N.A.
Does controller perform multiple retries and buffer/store alarm until connection is made? N.A.
Are multiple destinations possible? N.A.
Upon controller power loss or hardware failure:
Are network communications affected? N.A.
Is loss recognized on/by the network and alarm reported? N.A.
DO and AO response?
Volatile memory functions?
Upon restoration of power does the controller:
Auto-reboot without operator intervention? N.A.
Automatically reset/synchronize the clock? N.A.
Update all monitored functions? N.A.
Generate an alarm if backup battery is dead? N.A.
Upon network or communications failure does controller:
Continue to operate standalone? N.A.
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? N.A.
Does network store 'loss of communications' alarm with time of event? N.A.
Additional Information (optional) N.A.
Self Test Diagnostics
Does controller have internal self-test diagnostics to check:
Processor failure? N.A.
Internal hardware failure? N.A.
Open/shortened sensor? N.A.
Others? N.A.
Control Enclosure N.A.
Power Supply Required
Voltage 20-30 VAC, Class 2 at 50/60 hz
VA 50 VA maximum
Surge Protection Information not provided
Underwriters Laboratories UL 916 Energy listing, CSA C22.2 No. 205, CFR47
FCC FCC Part 15 Class A
CE Yes
LonMark Certified
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
No Supports BACnet services
Not submitted for testing
Information not provided

Programming Method(s)

(See also 'Software' Form)



(See also 'Software' Form)


Energy Management

SI-resident energy management functions/algorithms calculated and performed by this SI. One or more of these choices may be selected. 'No' indicates that it is not available.

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.
SI is not typically used for energy management functions

Specific, pre-programmed algorithms available.

'No' indicates that it is not available.

None (custom programming only)
None (not applicable)
Optimal Start/Optimal Stop
Peak Demand Limiting/Load Shedding
Additional Energy Management functions resident at individual controllers
Hardware I/O Points None
Additional SI Functions

Automatic-Dial Alarm Support

(See also 'Software' Form)

Yes if optional modem is present
Does SI perform multiple retries and buffer/store alarm until connection is made? Yes
Are multiple destinations possible? Yes
Upon SI power loss or hardware failure:
Is loss recognized on/by the network and alarm reported? Yes
Upon restoration of power does the SI:
Auto-reboot without operator intervention? Yes
Automatically reset/synchronize its clock? Yes
Automatically reset/synchronize its secondary network? Yes
Update all monitored functions? Yes
Generate an alarm if backup battery is dead? Yes
Control Enclosure Plastic (ABS + polycarbonate UL94 5VB) housing.