VMA1610 and VMA1620 Variable Air Volume Controllers
Installation Instructions
MS-VMA1610-xU, MS-VMA1620-xU
Part No. 24-10143-20, Rev. U
Issued November 2017
Refer to the QuickLIT website for the most up-to-date version of this document.
Applications
The VMA1610/1620 controllers are part of the Metasys®
family. VMA field controllers feature an integral 4 Nm
damper actuator and Differential Pressure Transducer.
VMA controllers run pre-engineered and
user-programmed applications required to monitor and
operate a wide variety of VAV boxes.
The VMA controllers operate on an RS-485 BACnet®
Master-Slave/Token-Passing (MS/TP) Bus as BACnet
Application Specific Controllers (B-ASCs) and integrate
into the web-based Metasys system.
Note: Only -xU models of these controllers are available.
These models are for smoke control applications
only. If your application is not for a UL 864 UUKL
10th Edition smoke control application, please
review the product selection before installation.
Important: In Metasys® system smoke control
applications, use only the VMA1610 and
VMA1620 models that are UL 864
UUKL/UUKLC 10th Edition Smoke Control
Listed. For Metasys system smoke control
applications, you must refer to the Metasys
System UL 864 UUKL Tenth Edition Smoke
Control System Technical Bulletin
(LIT-12012487) for detailed requirements
and procedures for installing,
commissioning, and operating UL 864
UUKL/UUKLC Listed Metasys system
devices. The UL 864 UUKL/UUKLC listing
for Smoke Control Equipment is voided if
(1) you do not use the required software
tools at the required versions; or (2) you do
not meet the requirements or do not follow
the procedures as documented in the
Metasys System UL 864 UUKL Tenth
Edition Smoke Control System Technical
Bulletin (LIT-12012487).
North American Emissions
Compliance
United States
This equipment has been tested and found to comply
with the limits for a Class A digital device pursuant to
Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful
interference when this equipment is operated in a
commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction
manual, may cause harmful interference to radio
communications. Operation of this equipment in a
residential area may cause harmful interference, in which
case the users will be required to correct the interference
at their own expense.
Canada
This Class (A) digital apparatus meets all the
requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la Classe (A) respecte toutes
les exigences du Règlement sur le matériel brouilleur
du Canada.
Installation
Observe these guidelines when installing a VMA16
controller:
• Transport the controller in the original container to
minimize vibration and shock damage to the VMA
controller.
• Do not drop the controller or subject it to physical
shock.
Parts Included
• one VMA16 controller with removable bus and power
terminal blocks
• one installation instructions sheet
1VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
To mount the VMA16 controller:
Materials and Special Tools Needed
• one screw or other type of fastener appropriate for
the mounting surface
• several 6 mm (1/4 in.) female spade terminals for
input and output wiring
• small straight-blade screwdriver for securing wires in
the terminal blocks
Mounting
Observe these guidelines when mounting a VMA.
Important: When the air supply to the VAV box is below
10°C (50°F), make sure that any
condensation on the VAV box, particularly
on the damper shaft, does not enter the
VMA electronics. Mount the VMA vertically
above the damper shaft to allow any shaft
condensation to fall away from the VMA.
Additional measures may be required in
some installations.
• Ensure the mounting surface can support the
controller and any user-supplied enclosure.
• Mount the controller on a hard, even surface
whenever possible.
• Use shims or washers to mount the controller securely
and evenly on the mounting surface.
• Mount the controller in an area free of corrosive
vapors and observe the ambient conditions in the
Technical Specifications section.
• Provide sufficient space around the controller for cable
and wire connections and good ventilation through
the controller. Leave a minimum of 50 mm (2 in.)
around the top, bottom, sides, and front of the
controller.
• Do not mount the controller on surfaces prone to
vibration, such as duct work, or in areas where
electromagnetic emissions from other devices or
wiring can interfere with controller communication.
On panel or enclosure mount applications, observe these
additional guidelines:
• Do not install the controller in an airtight enclosure.
• Mount the controller so that the enclosure walls do
not obstruct cover removal or ventilation through the
controller.
• Mount the controller so that the power transformer
and other devices do not radiate excessive heat to
the controller.
1. Place the controller in the proper mounting position
on the damper shaft so that the wiring connections
are easily accessible. Make sure the controller base
is parallel to the VAV box (perpendicular to the
damper shaft). If needed, use a spacer to offset
tipping of the VMA controller caused by the shaft
bushings.
2. Secure the self-drilling No. 10 screw through the
VMA controller mounting slot with a power
screwdriver and 100 mm (4 in.) extension socket.
Otherwise, use a punch to mark the position of the
shoulder washer, and then drill a hole into the VAV
box using a 3.5 mm (9/64 in.) drill bit. Insert the
mounting screw, and tighten against the washer.
Important: Do not overtighten the screws, or the
threads may strip. If mounting to the
VAV box, make sure the screws do not
interfere with damper blade movement.
3. Locate the damper position using the typical marking
on the end of the damper shaft (Figure 1).
Figure 1: Typical Damper End Shaft Icons
4. Note the direction, clockwise (CW) or
counterclockwise (CCW), required to close the
damper. Grasp the damper shaft firmly with pliers
and either manually close the damper (for 90° boxes)
or manually open the damper (for 45° or 60° boxes).
5. Push down and hold the Manual Override button
(Figure 2), and turn the VMA controller coupler until
it contacts the mechanical end-stop at either the fully
closed (90° boxes) or fully open (45° and 60° boxes)
position.
6. If the damper for a 90° box closes CCW, rotate the
coupler to the CCW mechanical limit. If the damper
for a 90° box closes CW, rotate the coupler to the
CW mechanical limit. The open end-stop is
automatically set for 90° boxes.
For 45° and 60° boxes, hard stops must be provided
at both fully closed and fully open damper positions.
By installing the VMA controller at the fully open
position, the VMA controller provides the open stop
for 45° and 60° boxes. The closed damper seal
provides the fully closed stop.
7. All models are compact in size and are easily
installed on Variable Air Volume (VAV) boxes with
a round shaft up to 13 mm in diameter, or a 10 mm
square shaft. Tighten the square coupler bolt to the
shaft using an 8 mm (5/16 in.) wrench or 10 mm (3/8
2VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
in.) 12-point socket. Tighten to 11 to 15 N·m (100 to
130 lb·in).
8. Loop the pneumatic tubing to include a trap for
condensation. Attach the tubing from the VMA
controller to the VAV box pickup. The HIGH (red)
tubing is connected to the inlet or high-pressure side
and the clear tubing to the low side (Figure 2).
9. Push the manual release button, and turn the
actuator coupling manually to ensure that the
actuator can rotate from fully closed to fully open
positions without binding.
10. Complete the mounting by rotating the damper to
the fully open position.
Risk of Property Damage. Rotate the damper to
the full-open position before starting the air handler.
Failure to rotate the damper to the full-open position
may result in damage to the VAV box or ductwork
when the air handler is started.
Mise En Garde: Risque de dégâts matériels:
Faire pivoter le registre pour le placer en position
d'ouverture complète avant de démarrer l'unité de
traitement d'air. Le non-respect de cette directive
risque d'endommager le caisson de l'unité à volume
d'air variable (VAV) ou le réseau de conduites au
démarrage de l'unité de traitement d'air.
3VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Figure 2: VMA16 Controller Physical Features and Wiring Terminations
4VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Wiring
Risk of Electric Shock. Disconnect the power supply
before making electrical connections to avoid electric
shock.
Mise En Garde: Risque de décharge électrique:
Débrancher l'alimentation avant de réaliser tout
raccordement électrique afin d'éviter tout risque de
décharge électrique.
Important: Do not connect supply power to the
controller before finishing wiring and
checking all wiring connections. Short
circuits or improperly connected wires can
result in damage to the controller and void
any warranty.
Important: Do not exceed the controller electrical
ratings. Exceeding controller electrical
ratings can result in permanent damage to
the controller and void any warranty.
FC Bus Terminal Block
The FC Bus terminal block is a blue, removable,
4-terminal plug that fits into a board-mounted jack.
Wire the removable FC Bus terminal block plugs on the
VMA and other field controllers in a daisy-chain
configuration using 3-wire twisted, shielded cable as
shown in Figure 3. See Table 4 for more information.
Note: The Shield terminal (SHLD) on the FC Bus
terminal block is isolated and can be used to
connect the cable shields on the bus (Figure 3).
Figure 3: FC Bus Terminal Block Wiring
Important: Use copper conductors only. Make all wiring
in accordance with local, national, and
regional regulations.
Important: Electrostatic discharge can damage
controller components. Use proper
electrostatic discharge precautions during
installation, setup, and servicing to avoid
damaging the controller.
For detailed information on configuring and wiring an
MS/TP Bus, Field Controller (FC) bus, or Sensor/Actuator
(SA) bus, refer to the MS/TP Communications Bus
Technical Bulletin (LIT-12011034).
VMA Terminals and Bus Ports
See Figure 2 for input and output terminal and bus port
locations on the VMA controller. Observe the following
guidelines when wiring a VMA controller.
Input and Output Terminals
The input spade terminals are located on the side of the
VMA near the device address switch. The output spade
terminals are located on the opposite side of the controller
near the power supply terminal block. See Table 1 for
more information.
SA Bus Terminal Block
The SA Bus terminal block is a brown, removable,
4-terminal plug that fits into a board-mounted jack.
Wire the removable SA Bus terminal block plugs on the
VMA and other SA Bus devices in a daisy-chain
configuration using 4-wire twisted, shielded cable as
shown in Figure 4. See Table 4 for more information.
5VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Figure 4: SA Bus Terminal Block Wiring
Sensor Port
The Sensor (SA Bus) port on the left side of the VMA
(Figure 2) is an RJ-12, 6-position modular jack that
provides a connection for the VAV Balancing Tool,
specified network sensors, or other SA Bus devices with
RJ-12 plugs.
The Sensor port is connected internally to the SA Bus
terminal block. See Table 4 for more information. The
Sensor Port pin assignment is shown in Figure 5.
The supply power wire colors may be different on
transformers from other manufacturers. Refer to the
transformer manufacturer’s instructions and the project
installation drawings for wiring details.
Important: Connect 24 VAC supply power to the VMA
and all other network devices so that
transformer phasing is uniform across the
network devices. Powering network devices
with uniform 24 VAC supply power phasing
reduces noise, interference, and ground
loop problems. The VMA does not require
an earth ground connection.
Figure 6: 24 VAC Supply Power Terminal Block Wiring
Figure 5: Pin Number Assignments for Sensor, SA
Bus, and FC Bus Ports on VMAs
Supply Power Terminal Block
The 24 VAC supply power terminal block is a gray,
removable, 3-terminal plug that fits into a board-mounted
jack on the bottom right of the VMA.
Wire the 24 VAC supply power wires from the transformer
to the HOT and COM terminals on the terminal plug as
shown in Figure 6. The middle terminal on the supply
power terminal block is not used. See Table 4 for more
information.
To wire the VMA controller:
1. Terminate wiring per engineering drawings.
2. Wire network sensors and other devices to the VMA's
SA Bus.
3. Wire the FC Bus in a daisy chain.
4. Ensure that the VMA’s device address DIP switches
are set to the appropriate device address. (See
Setting the Device Address.)
5. Connect the VMA controller to 24 VAC, Class 2
power.
6VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
VMA Terminal Functions, Ratings,
Requirements, and Wiring Guidelines
Input and Output Wiring Guidelines
Table 1 provides information about the functions, ratings,
and requirements for the VMA input and output terminals;
and references guidelines for determining proper wire
sizes and cable lengths.
In addition to the wiring guidelines in Table 1, observe
these guidelines when wiring VMA inputs and outputs:
• Run all low-voltage wiring and cables separate from
high-voltage wiring.
• All input and output cables, regardless of wire size or
number of wires, should consist of twisted, insulated,
and stranded copper wires.
Table 1: I/O Terminal Blocks, Functions, Ratings, Requirements, and Cables
Terminal Block
Label
(Inputs)
Labels
+15 VUNIVERSAL
INn
ICOMn
Function, Ratings, and RequirementsTerminal
15 VDC Power Source for active (3-wire) input devices
connected to the Universal INn terminals.
Provides 100 mA total current.
Analog Input - Voltage Mode (0–10 VDC)
10 VDC maximum input voltage
Internal 75k ohm Pulldown
Analog Input - Resistive Mode (0–600k ohm)
Internal 12 V, 15k ohm pull up
Qualified Sensors: 0–2k potentiometer,
RTD (1k Nickel [Johnson Controls sensor],
1k Platinum, and A99B Silicon Temperature Sensor)
Negative Temperature Coefficient (NTC) Sensor
10K Type L (10K JCI Type II is equivalent to Type L) or
2.252K Type II
Universal Input Common for all Universal IN terminals
Note: All Universal ICOMn terminals share a common,
which is isolated from all other commons.
• Shielded cable is not required for input or output
cables.
• Shielded cable is recommended for input and output
cables that are exposed to high electromagnetic or
radio frequency noise.
• Cable runs that are less than 30 m (100 ft) typically
do not require an offset in the input/output software
setup. Cable runs that are over 30 m (100 ft) may
require an offset in the input/output software setup.
To Determine Wire Size and
Maximum Cable Length
Same as (Universal) INn.
Note: Use 3-wire cable for
devices that source power from
the +15 V terminal.
See Guideline A in Table 2.
See Guideline A in Table 2.
Same as (Universal) INn.
7VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Table 1: I/O Terminal Blocks, Functions, Ratings, Requirements, and Cables
Terminal Block
Label
BINARY
(Outputs)
CONFIGURABLE
(Outputs)
Labels
OUTn
OCOMn
OUTn
OCOMn
Function, Ratings, and RequirementsTerminal
Binary Output - 24 VAC Triac (Internal Power)
Sources internal 24 VAC power (24~ HOT)
Binary Output - 24 VAC Triac (Internal Power)
Connects OCOMn to 24~ COM when activated.
Internal Power Source:
30 VAC maximum voltage to load
0.5 A maximum output current
1.3 A at 25% duty cycle
Maximum 6 cycles/hour with M9220-BGx-3
40 mA minimum load current
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
10 mA maximum output current
External 1k to 50K ohm load required
Binary Output 24 VAC Triac
Connects OUT to OCOM when activated.
External Power Source:
30 VAC maximum voltage to load
0.5 A maximum output current
1.3 A at 25% duty cycle
Maximum 6 cycles/hour with M9220-BGx-3
40 mA minimum load current
Analog Output Signal Common: All Configurable Outputs
defined as Analog Outputs share a common, which is
isolated from all other commons except the Binary Input
common.
Binary Output Signal Common: All Configurable Outputs
defined as Binary Outputs are isolated from all other
commons, including other Configurable Output commons.
To Determine Wire Size and
Maximum Cable Length
See Guideline C in Table 2.
See Guideline A in Table 2.
See Guideline C in Table 2.
Same as (Configurable) OUTn.
1
See Table 2 to determine wire size and cable lengths for cables other than the recommended cables.
Table 2 defines cable length guidelines for the various wire sizes that may be used for input and output wiring.
8VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Table 2: Cable Length Guidelines for Recommended Wire Sizes
AssumptionsMaximum Cable Length and TypeWire Size/Gauge and TypeGuideline
457 m (1,500 ft) twisted wire1.0 mm (18 AWG) stranded copperA
297 m (975 ft) twisted wire0.8 mm (20 AWG) stranded copper
183 m (600 ft) twisted wire0.6 mm (22 AWG) stranded copper
107 m (350 ft) twisted wire0.5 mm (24 AWG) stranded copper
229 m (750 ft) twisted wire1.0 mm (18 AWG) stranded copperB
137 m (450 ft) twisted wire0.8 mm (20 AWG) stranded copper
91 m (300 ft) twisted wire0.6 mm (22 AWG) stranded copper
61 m (200 ft) twisted wire0.5 mm (24 AWG) stranded copper
C
See Figure 7 to select wire size/gauge.
Use stranded copper wire.
See Figure 7 to determine cable length.
Use twisted wire cable.
100 mV maximum voltage drop
Depending on the cable length
and the connected input or
output device, you may have to
define an offset in the setup
software for the input or output
point.
100 mV maximum voltage drop
Depending on the cable length
and the connected input or
output device, you may have to
define an offset in the setup
software for the input or output
point.
N/A
Termination Details
A set of Johnson Controls® termination diagrams provides details for wiring inputs and outputs to the controllers.
See the figures in this section for the applicable termination diagrams.
Table 3: Termination Details
Type of Field Device
Input/Output
UI
UIVoltage Input - External
Source
UIVoltage Input - Internal
Source
Termination DiagramsType of
9VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Table 3: Termination Details
Type of Field Device
Input/Output
UIVoltage Input
(Self-Powered)
UIDry Contact
CO or AO0–10 VDC Output to
Actuator (External
Source)
Termination DiagramsType of
Actuator (Internal
Source)
(Switch Low, External
Source)
CO or AO0–10 VDC Output to
CO or AOAnalog Output (Voltage)
CO or AO24 VAC Triac Output
10VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Table 3: Termination Details
Type of Field Device
Input/Output
CO or AOIncremental Control to
Actuator (Switch Low,
Externally Sourced)
BO24 VAC Binary Output
(Switch Low, Internal
Source)
BOIncremental Control to
Actuator (Switch Low,
Internal Source)
Termination DiagramsType of
.
Jack (Fixed Address =
199)
SA BusNetwork Stat with Phone
11VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Table 3: Termination Details
Type of Field Device
Input/Output
SA BusNetwork Stat with
Terminals Addressable
SA BusNetwork Stat with
Terminals (Fixed
Address = 199)
Termination DiagramsType of
Maximum Cable Length versus
Load Current
Use Figure 7 to estimate the maximum cable length
relative to the wire size and the load current (in mA) when
wiring inputs and outputs.
12VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Figure 7: Maximum Wire Length by Current and Wire Size
FC and SA Bus and Supply
Power Wiring Guidelines
Table 4 provides information about terminal block
functions, ratings, and requirements.
Table 4 also provides wire size, cable type, and cable
length guidelines for wiring the VMA communication
buses and supply power.
In addition to the guidelines in Table 4, observe these
guidelines when wiring the SA/FC Buses and supply
power:
• Run all low-voltage wiring and cables separate from
high-voltage wiring.
• All FC and SA Bus cables, regardless of wire size,
should be twisted, insulated, stranded copper wire.
• Shielded cable is strongly recommended for all FC
and SA Bus cables.
•
Refer to the MS/TP Communications Bus Technical
Bulletin (LIT-12011034) for detailed information
regarding wire size and cable length requirements for
the FC and SA buses.
Table 4: Communication Bus and Supply Power Terminal Blocks, Functions, Ratings, Requirements, and
Cables
Function, Electrical Ratings/RequirementsTerminal LabelsTerminal
Recommended Cable Type
Block/Port Label
FC BUS
SA BUS
2
-
COM
2
-
FC Bus Communications+
Signal Reference (Common) for bus
communications
Isolated terminal (optional shield drain connection)SHLD
SA Bus Communications+
SA Bus Signal Reference and 15 VDC CommonCOM
15 VDC Supply Power for Devices on the SA BusSA PWR
0.6 mm (22 AWG) stranded,
3-wire twisted, shielded cable
recommended
0.6 mm (22 AWG) stranded,
4-wire (2 twisted-pairs), shielded
cable recommended
The + and - wires are one
twisted pair and the COM and
SA PWR are the second twisted
pair of wires.
1
13VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Table 4: Communication Bus and Supply Power Terminal Blocks, Functions, Ratings, Requirements, and
Cables
Function, Electrical Ratings/RequirementsTerminal LabelsTerminal
Recommended Cable Type
Block/Port Label
SENSOR
(SA Bus Port)
1
2 The SA Bus and FC Bus wiring recommendations in this table are for MS/TP bus communications at 38.4k baud. For more
2
See Table 2 to determine wire size and cable lengths for cables other than the recommended cables.
information, refer to the MS/TP Communications Bus Technical Bulletin (LIT-12011034).
SENSOR
HOT24~
COM
RJ-12 6-Position Modular Connector provides:
SA Bus Communications
SA Bus Signal Reference and 15 VDC Common
15 VDC Power for devices on the SA Bus
24 VAC Power Supply - Hot
Supplies 20–30 VAC (Nominal 24 VAC)
24 VAC Power Supply Common (Isolated from
all other Common terminals on controller)
24 AWG 3-pair CAT 3 Cable
<30.5 m (100 ft)
0.8 mm to 1.0 mm
(20 to 18 AWG) 2-wire
1
Setup and Adjustments
Important: Electrostatic discharge can damage
controller components. Use proper
electrostatic discharge precautions during
installation, setup, and servicing to avoid
damaging the controller.
Setting the Device Address
Metasys field controllers are master devices on BACnet
MS/TP (SA or FC) buses. Before operating controllers
on a bus, you must set a valid and unique device address
for each controller on the bus.
You set a controller's device address by setting the
positions of the switches on the Device Address DIP
switch block at the top of the controller (Figure 2). Valid
addresses for these controllers are device addresses 4
through 127.
The DIP switch block (Figure 8) has eight switches
numbered 128, 64, 32, 16, 8, 4, 2, and 1. Switches 64
through 1 are device address switches. Switch 128 is a
mode switch that enables a field controller to operate on
a ZFR1800 Series Wireless Field Bus. Switch 128 must
be set to off for all hard-wired SA and FC Bus
applications.
Figure 8: Device Address Switches Set to 21
Note: Metasys field controllers ship with switch 128 ON
and the remaining address switches off. This
renders the controllers wired slave devices, which
do not operate on MS/TP buses, but do not
interfere with bus operation. Set a valid and
unique device address on the controller before
applying power to the controller on the bus.
To set the device addresses on a VMA controller:
1. Set all of the switches on the controller’s device
address DIP switch block (128 through 1) to off.
2. Set one or more of the seven address switches (64
through 1) to ON, so that the sum of the switch
numbers set to ON equals the intended device
address. See Table 5 for valid controller addresses.
Set the highest number switch that is less than or
equal to the intended device address to ON. Then
continue setting lower numbered switches until the
total equals the intended address. For example, if the
intended device address is 21, set switch 16 to ON
first, then set switch 4 ON, followed by switch 1
(16+4+1= 21). See Figure 8.
Note: Do not connect a field controller with switch
128 set to ON to an active (hard-wired) SA or
FC Bus. When a controller with switch 128 set
to ON and a device address from 4 to 127 is
connected to a wired field bus, the entire field
bus is rendered inoperable until the controller
is disconnected or switch 128 is set to OFF.
3. Set a unique and sequential device address for each
of the controllers connected on the SA or FC Bus
starting with device address 4.
14VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
To ensure the best bus performance, set sequential
device addresses with no gaps in the device address
range (for example, 4, 5, 6, 7, 8, and 9). The
controllers do not need to be physically connected
on the bus in their numerical device address order.
4. Write each controller's device address on the white
label below the DIP switch block on the controller's
cover.
Refer to the MS/TP Communications Bus Technical
Bulletin (LIT-12011034) for more information on field
controller device addresses and how to set them on
MS/TP buses.
Table 5 describes the valid FC Bus and SA Bus devices
addresses for Johnson Controls®MS/TP communications
bus applications.
To set the EOL switch on a VMA controller:
1. Determine the physical location of the VMA controller
on the SA or FC Bus.
2. Determine if the controller must be set as a
terminating device on the bus.
Note: The EOL termination rules for SA Buses and
FC Buses are different. Refer to the MS/TP
Communications Bus Technical Bulletin
(LIT-12011034) for detailed information
regarding EOL termination rules and EOL
switch settings on SA and FC Buses.
3. If the controller is a terminating device on the SA Bus
or FC Bus, set the EOL switch to ON. If the controller
is not a terminating device on the bus, set the EOL
switch to off.
Table 5: SA/FC Bus Device Address Descriptions
Address DescriptionDevice
Address
0
(Switch 128
Off)
1 to 3
(Switch 128
Off)
4 to 127
(Switch 128
Off)
Reserved for FC Bus Supervisory Controller.
Not valid for controllers.
Reserved for peripheral devices. Not valid for
controllers.
Valid for MS/TP Master controllers on a
hardwired SA Bus or FC Bus.
Setting the EOL Switch
Each controller has an End-of-Line (EOL) switch, which,
when set to ON (up), sets the VMA controller as a
terminating device on the bus. See Figure 2 for the EOL
switch location on the controller. The default EOL switch
position is off (down).
Figure 9: EOL Switch Positions
Commissioning
Use the following procedure to commission the VMA
controller:
1. Download the control application to the VMA controller
using the Metasys Controller Tool. Refer to the
Controller Tool Help (LIT-12011147).
2. Commission the VAV Box. Refer to the Controller
Tool Help (LIT-12011147).
3. Balance the airflow on the VAV box. Refer to the VAV
Balancing Tool Technical Bulletin (LIT-12011087).
4. Perform commissioning checkout procedures. Refer
to the Controller Tool Help (LIT-12011147).
Troubleshooting
Table 6 provides LED status indicator information to help
troubleshoot the VMA controller.
Table 6: VMA16 Series Controller Status LEDs
LED
Label
LED
Color
GreenPOWER
RedFAULT
Normal
State
On
Steady
Off
Steady
Descriptions of LED
States
Off Steady = No power
On Steady = Power is supplied
by primary voltage.
Blink - 2 Hz = Download or
startup in progress; not ready
for normal operation
Off Steady = No faults
On Steady = Device fault or no
application loaded
15VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Table 6: VMA16 Series Controller Status LEDs
LED
Label
LED
Color
GreenFC BUS
GreenSA BUS
Normal
State
Blink - 2
Hz
Blink - 2
Hz
Descriptions of LED
States
Blink - 2 Hz = Data
transmission (normal
communication)
Off Steady = No data
transmission (auto baud in
progress)
On Steady = Communication
lost, waiting to join
communication ring
Blink - 2 Hz = Data
transmission (normal
communication)
Off Steady = No data
transmission (N/A - auto baud
not supported)
On Steady = Communication
lost, waiting to join
communication ring
Repair Information
If the VMA controller fails to operate within its
specifications, contact the Johnson Controls® Repair
Center in Louisville, Kentucky, at 1-502-671-7312. The
MS-VMA1610-xU and MS-VMA1620-xU models have
special replacement requirements because they are UL
864 10th Edition UUKL/ORD-C100-13 UUKLC listed for
smoke control.
Accessories
Use Table 7 to order accessories.
Table 7: VMA Accessories (Order Separately)
DescriptionProduct Code Number
PAN-PWRSP-U
MS-BTCVTCBL-700
NS Series Sensors
Transformer, 96 VA Class 2 120/24 VAC power supply, compliant for UL 864 UUKL/UUKLC
Tenth Edition Smoke Control System
2-position Screw Terminal that Plugs onto VMA Output Point Spade LugsAP-TBK1002-0
3-position Screw Terminal that Plugs onto VMA Output Point Spade LugsAP-TBK1003-0
Replacement MS/TP SA Bus Terminal, 4-Position Connector, Brown (Bulk Pack of 10)AP-TBK4SA-0
Replacement MS/TP FC Bus Terminal, 4-Position Connector, Blue (Bulk Pack of 10)AP-TBK4FC-0
Replacement Power Terminal, 3-Position Connector, Gray (Bulk Pack of 10)AP-TBK3PW-0
BACnet IP to MS/TP Router for Connecting a Computer with CCT to MS/TP Field ControllersTL-BRTRP-0
Cable Replacement Set for the MS-BTCVT-1 or the NS-ATV7003-0; Includes One 5 ft (1.5 m)
Retractable Cable
NS Series Network Sensors: Refer to the NS Series Network Sensors Product Bulletin
(LIT-12011574) for specific sensor model descriptions
16VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Technical Specifications
Table 8: VMA16 Controllers
Product Code Numbers
Supply Voltage
Power Consumption
Ambient Conditions
Terminations
Controller Addressing
Communications Bus
Input and Output Capabilities
Analog Input/Analog Output
Resolution and Accuracy
MS-VMA1610-0U: 1 UI VMA (Cooling Only)
MS-VMA1610-1U: 1 UI VMA (Cooling Only)
MS-VMA1620-0U: 1 UI, 3 BO, 2 CO VMA (Cooling with Reheat and Fan Control)
Note: MS-VMA1620-1U: 1 UI, 3 BO, 2 CO VMA (Cooling with Reheat and Fan Control) Only
-xU models of these controllers are available. These models are for smoke control applications
only. If your application is not for a UL 864 UUKL 10th Edition smoke control application, please
review the product selection before installation.
24 VAC (nominal, 20 VAC minimum/30 VAC maximum), 50/60 Hz, power supply Class 2 (North
America), Safety Extra-Low Voltage (SELV) (Europe)
10 VA typical, 14 VA maximum
Note: VA rating does not include any power supplied to the peripheral devices connected to
Binary Outputs (BOs) or Configurable Outputs (COs), which can consume up to 12 VA for each
BO or CO for a possible total consumption of an additional 60 VA (maximum).
Operating: 0 to 50°C (32 to 122°F)
Storage: -40 to 70°C (-40 to 158°F)
Inputs/Outputs: 6.3 mm (1/4 in.) spade lugs
FC Bus, SA Bus, and Supply Power: 4-Wire and 3-Wire Pluggable Screw Terminal Blocks
Sensor Port: RJ-12 6-Pin Modular Jacks
DIP switch set; valid controller device addresses 4–127
(Device addresses 0–3 and 128–255 are reserved and not valid controller addresses.)
BACnet MS/TP, RS-485:
3-wire FC Bus between the supervisory controller and controllers
4-wire SA Bus between VMA controller, network sensors and other sensor/actuator devices;
includes a terminal to source 15 VDC supply power from VMA to SA Bus devices
VMA1610:
1 - Universal Input: Defined as 0–10 VDC, 0–600k ohm, or Binary Dry Contact
VMA1620:
1 - Universal Input: Defined as 0–10 VDC, 0–600k ohm, or Binary Dry Contact
3 - Binary Outputs: Defined as 24 VAC Triac (internal power source)
2 - Configurable Outputs: Defined as 0–10 VDC or 24 VAC Triac BO
Analog Input: 15-bit resolution
Analog Output: 16-bit resolution and ±200 mV in 0–10 VDC applications
1
17VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
Table 8: VMA16 Controllers
Air Pressure Differential
Sensor
Actuator Rating
Dimensions
(Height x Width x Depth)
Compliance
Setra transducer, differential pressure to electrical, 0 to 38.1 mm (0 to 1.5 in.) WC, 0.5 to 4.5
VDC, 5 VDC supply, aluminum plated
Performance Characteristics:
Combined Repeatability and Hysteresis Error: ±0.05% of Full Span Maximum
Non-linearity Errors (Best Fit Method): ±1.0% of Full Span Maximum
Response Time (to within 63% of Full Scale Pressure with Step Change on Input): 15 ms
Temperature Error from 15.6 to 48.9°C (60 to 120°F)
Null: ±0.06% of Full Span per °F Maximum
Span: ±1.5% of Full Span Maximum
Stability, Null: ±0.5% of Full Scale Maximum, 1 Year Minimum
Stability, Span: ±2.0% of Full Scale Maximum, 1 Year Minimum
Torque: 4 N·m (35 lb·in)
Stroke Time: 60 sec at 60 Hz, 72 sec at 50 Hz
Minimum Shaft Length: 44 mm (1-3/4 in.)
Mounts to damper shaft using single set screw and to duct with single mounting screw.Mounting
182 x 182 x 64 mm (7-3/16 x 7-3/16 x 2-1/2 in.)
Note: Center of output hub to center of anti-rotation slot is 160mm (6-5/16 in.).
0.86 kg (1.9 lb)Weight
United States: UL Listed, File E107041, CCN PAZX, UL 916, Energy Management Equipment;
UL Listed, File S4977, UUKL 864 - 10th Edition, Smoke Control Equipment (MS-VMA1610-0U,
MS-VMA1610-1U, MS-VMA1620-0U, and MS-VMA1620-1U models only); FCC Compliant to
CFR47, Part 15, Subpart B, Class A
Canada: UL Listed, File E107041, CCN PAZX7, CAN/CSA C22.2 No. 205, Signal Equipment;
UL Listed, File S4977, UUKLC ULC-ORD-C100-13, Smoke Control System Equipment
(MS-VMA1610-0U, MS-VMA1610-1U, MS-VMA1620-0U, and MS-VMA1620-1U models only);
Industry Canada Compliant, ICES-003
Europe: CE Mark – Johnson Controls declares that this product is in compliance with the
essential requirements and other relevant provisions of the EMC Directive.
Australia and New Zealand: RCM Mark, Australia/NZ Emissions Compliant.
BACnet International: BACnet Testing Laboratories (BTL) Protocol Revision 7 Listed BACnet
Application Specific Controller (B-ASC)
1
For more information, refer to the MS/TP Communications Bus Technical Bulletin (LIT-12011034).
The performance specifications are nominal and conform to acceptable industry standard. For application at conditions
beyond these specifications, consult the local Johnson Controls office. Johnson Controls shall not be liable for
damages resulting from misapplication or misuse of its products.
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18VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
507 E. Michigan Street, Milwaukee, WI 53202
Building Technologies & Solutions
Metasys® and Johnson Controls® are registered trademarks of Johnson Controls.
All other marks herein are the marks of their respective owners.© 2017 Johnson Controls
www.johnsoncontrols.comPublished in U.S.A.
19VMA1610 and VMA1620 Variable Air Volume Controllers Installation Instructions
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