DDC Online direct digital controls
Johnson Controls - Metasys Extended Architecture  

VMA1210; VMA1220

Secondary Control Units
VMA-1200 Series Controller (LON)
Date Last Saved: 7/26/2011 3:04:15 PM

Product Name(s): VMA1210; VMA1220
Product Description: The VMA-1200 Series controllers are application-specific, configurable controllers provided with on-board pressure sensor and electric damper actuators for VAV terminal unit applications and are located on the Lon Bus. They are supervised by an NCM or N30/31 (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'
Product Application(s): Configurable controllers with integral actuator designed for pressure independent, or constant volume single duct systems. The VMA1210 are used for cooling only, and the VMA1220 is used for cooling w/reheat and also for series/parallel fan-powered boxes. Reheat options for the VMA1220 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

Universal Input (AI or DI): See below
Analog Output (AO): See below 0-10 Vdc (@ 10 mA)
Digital Output (DO): See below Triac switch (24Vac, 0.5A resistive max)
Universal Output (UO):
Control Unit Model #:AIDIUIDOAOUOOther
VMA1210 2 3
VMA1220 4 3 5 1
A/D Converter Resolution
8 bit
10 bit
12 bit
16 bit
Other 13 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? Yes. Velocity pressure for 0 - 1.5 in. w.c. (374 Pascal)
Integral Damper Actuator? Yes. Actuator uses a synchronous quarter-turn motor that modulates over a 90 second cycle. 35 lb-in
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) - TP/FT-10, Lontalk @ 78 kbps
External Communication Ports, Speeds and Access Devices (1) - Zone Bus to Room Sensor
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: (Note: PC and Palm-based interface from the zone requires special cables)

TMZ Model with LCD display

Palm-compatible running VBT software
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 Information not provided.
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? No
Battery Type(s) NA
Battery Life NA
Backup Battery Operating Time NA
Non-Volatile Memory Capacity (EEPROM/Flash)* 56 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? Information not provided.
How many total trend values can be stored? Not applicable
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? Information not provided.
When full, does controller automatically send up trend data, overwrite data, or stop logging data? Not applicable
Programming Method(s) Requires M-Pro software tool, a menu-based programming/configuration package that is part of the M-Tool package. M-Pro is run on a laptop or workstation PC. Commissioning is performed using the VMA Balancing Tool (VBT) software, running on a Palm-compatible handheld device. VBT allows for modification of heating and cooling setpoints; flow gain/K-factor calculation and changes; and air flow parameter modifications.
Resident vs Non-Resident Program Execution Configurable 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 controller 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.)
Additional Energy Management functions are resident at SI
Additional Programming Functions
DDC Loops (P, PI, PID) PI
Automatic PID Tuning Feature Yes. Proprietary adaptive algorithms, such as the patented P-Adaptive and Pattern Recognition Adaptive Control (PRAC) technologies, are used to continuously adjust 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?
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? Information not provided.
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 UL plenum-rated plastic enclosure.
Power Supply Required
Voltage 24 Vac
Surge Protection Optional fuse
Underwriters Laboratories UL 916 (Energy Management)

UL 864 (UUKL) UL 94-5VB
FCC Part 15, Sub-Part B, Class A
CE Directive (89/336/EEC, EN50081-1, EN50082-2) Industrial
LonMark Certified
Yes LonMark Version 3.1
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Not submitted for testing
Information not provided