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Johnson Controls - Metasys Extended Architecture  

VMA-1410 ; VMA-1420 ; VMA-1430; VMA-1440

Secondary Control Units
VMA-1400 Series Controllers (N2)
Date Last Saved: 7/26/2011 3:04:58 PM

Product Name(s): VMA-1410 ; VMA-1420 ; VMA-1430; VMA-1440
Product Description: The VMA-1400 Series controllers are application-specific controllers provided with on-board electric damper actuators for VAV terminal unit applications and are located on the proprietary N2 Bus. They are polled by an NCM or N30 (SI) during normal operation and can also operate stand-alone. Both models contain common VAV terminal control sequences pre-programmed and can be user-modified for custom sequences using 'side loops'. (See also 'Programming')
Product Application(s): Application-specific controller with integral actuator designed for pressure-dependent, pressure independent, or constant volume single duct, dual-duct, fan-powered, and supply/exhaust terminal unit applications. Reheat options include proportional, 2-position, or floating valves; or 1, 2, or 3 stage electric. Baseboard heat can also be controlled.
Point Quantity Characteristics
Analog Input (AI): See below 0-10 Vdc

1000 ohm RTD

Resistance (up to 2000 ohm)

Digital Input (DI): See below Dry Contact
24 VAC
Universal Input (AI or DI): See below
Analog Output (AO): 0-10 Vdc (@ 10 mA)
Digital Output (DO): Triac switch (24Vac, 0.5A resistive max)
Universal Output (UO):
Control Unit Model #:AIDIUIDOAOUOOther
VMA-1410 2 3 0 0
VMA-1420 4 3 5 2
VMA-1430 4 3 5 2
VMA-1440 4 3 5 2
A/D Converter Resolution
8 bit
10 bit
12 bit
16 bit
Other 15 bit
D/A Converter Resolution
6 bit
8 bit
10 bit
No Analog Output
Other 12 bit
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? Yes Velocity pressure for 0 - 1.5 in. w.c. (374 Pascal)
Integral Damper Actuator? Yes. 35 in-lbs torque, 90 Degrees (adj)
Can controller accept occupant override from thermostat? Yes. Occupant override can be performed via operator workstation, network terminal, local display panel, custom programmed DI or AI, or momentary contact pushbutton or potentiometer on compatible zone thermostats.
Can controller accept occupancy sensor input? Yes
Expander Boards
Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
(1) - Proprietary port to secondary 'N2 Network' @ 9.6 kbps (polling)
External Communication Ports, Speeds and Access Devices (1) - EIA-485 port @ 1.2 kbps. To: ZBI.
Additional Information (Optional) Johnson Controls uses the Opto 22 Optomux protocol, which is open and available to developers upon request
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 Available: PC and Palm based interface from the zone requires special cables.

MetaStat (thermostat with optional RJ-45 zone interface

Zone Terminal (Handheld Interface that can also be permanently zone-mounted)
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) 8 bit Motorola 68HC11 operating at 8 MHz
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
Clock Synchronization Clock time on all devices on the N2 network is synchronized daily by the lowest-numbered NCM (SI).
Volatile Memory (RAM) Capacity 32 kB 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? No
Battery Type(s) NA
Battery Life NA
Backup Battery Operating Time NA
Non-Volatile Memory Capacity (EEPROM/Flash)* 256 kB Flash
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? No
How many total trend values can be stored? N/A
What is the controllers role in trending? None. Trend points data is called by the SI (NCM) and stored temporarily before being archived at the OWS.
Can controller be programmed to 'push' data to archive or are trends 'pulled' from controller? Information not provided.
When full, does controller automatically send up trend data, overwrite data, or stop logging data? N/A
Programming Method(s) Requires HVAC Pro for Windows, a menu-based programming/configuration package. HVAC Pro is run on a laptop or workstation PC, and can be directly connected to the controller via the N2 bus, or via the Zone bus using the Cable Pro EIA-232 (9-pin serial) to EIA-485 (RJ-45) communications interface/adapter. A workstation can be used to run HVAC Pro, with most programming and commissioning features available. Only operating parameters can be modified using PMI User Interface software.
Resident vs Non-Resident Program Execution Standard software is resident in the controller. Custom variations (called 'Side Loops') can be programmed in GPL and reside at the NCM, with commands communicated to the VAV via the N2 secondary network.
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 (See 'Additional Programming Functions' below)
Additional Energy Management functions are resident at SI
Additional Programming Functions Finds system deviations related to damper movement and comfort control that can be identified using the Exponentially Weighted Moving Average (EWMA) calculations for further investigation and correction.
DDC Loops (P, PI, PID) PI
Automatic PID Tuning Feature Yes. Proportional Adaptive (P-adaptive) and Pattern Recognition Adaptive Control (PRAC)for continuous loop tuning.
Automatical-Dial Alarm Support No
Does controller perform multiple retries and buffer/store alarm until connection is made? No
Are multiple destinations possible? No
Upon controller power loss or hardware failure:
Are network communications affected? No
Is loss recognized on/by the network and alarm reported? Yes. An alarm is generated by the NCM when the controller loses power
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
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? NA
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
Does network store 'loss of communications' alarm with time of event? Yes
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? Yes
Others? Diagnostics are provided that process historical information and alert the user to abnormal operation. Diagnostics include excessive actuator movement (cycling), actuator stall, temperature fluctuations, sensor errors, and airflow out-of-range.
Control Enclosure Durble, plenum rated plastic housing. UL-94 5VB Plenum flammability rating.
Power Supply Required
Voltage 24 Vac
VA 10 VA (Relay and valve requirements not included.)
Surge Protection Optional fuse
Underwriters Laboratories UL 916 (Energy Management)

UL 864 (UUKL) UL 94-5VB
FCC Part 15, Sub-Part B, Class A and B
CE Directive (89/336/EEC, EN50081-1, EN50082-2) Industrial
LonMark Certified
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Not submitted for testing
Information not provided