Johnson Controls VMA18 Series, MS-VMA1832 series, MS-VMA1826 series, VMA1826, VMA1832 Installation Instructions Manual

VMA1826/1832 VAV Controller Installation Instructions

MS-VMA1826-x, MS-VMA1832-x

Part No. 24-10143-373, Rev. J

Issued September 2018

Refer to the QuickLIT website for the most up-to-date version of this document.

Applications

The VMA18 Series programmable VAV box controllers
are intended for use as functional replacements for the
VMA1410, VMA1415, VMA1420, and the VMA1440
controllers.

VMA1826 controllers are well-suited for commercial
zoning applications and can be used for pressure
dependent VAV box applications where no differential
pressure tranduser (DPT) is required.

Note: With CCT Release 10.1 and higher, VMA18 Series

controllers can be configured as either N2 devices

or as BACnet® MS/TP devices. This ability

provides a potential cost-effective protocol
upgrade path for existing customers and should
be considered when you install the controller.

Important: When you receive a VMA18 Series

controller from the factory or upgrade the
firmware or main code, the controller
defaults to using the MS/TP
communications protocol. The Load
Summary screen of CCT 10.1 and above
shows the connection as Wired Field Bus,
indicating that the MS/TP protocol is in use.
If you have an N2 application, the Load
Summary screen indicates that you need
to switch the communications protocol to
N2.

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.

These VMA controllers feature an integral digital pressure
sensor (VMA1832 model only), a damper actuator, and
a 32-bit microprocessor. The controller's small package
size facilitates quick field installation and efficient use of
space for field replacements, while still enabling precision
control performance.

Note: Connecting an IOM to the VMA via the SA Bus

connection is not supported.

For information about sensor compatibility and
replacement, see Sensor Replacement and Reuse

Scenarios.

Installation

Observe these guidelines when installing a VMA18 Series
controller:

• Transport the VMA controller in the original container
to minimize vibration and shock damage to the VMA
controller.

• Do not drop the VMA controller or subject it to physical
shock.

Parts Included

• One VMA18 Series controller with removable N2/FC
bus terminal block

• One installation instructions sheet

1VMA1826/1832 VAV Controller Installation Instructions

• Two 1/4 in. x 1/4 in. (6.35 mm x 6.35 mm) brass
fittings

• One self-drilling No. 10 x 25 mm (1 in.) screw

• Two 12-in. (30.48 cm.) pieces of flexible tubing

• One controller/sensor Y cable adapter

• One 8-pin to 6-pin single-socket cable adapter

Note: Remove the cap plug from the TSTAT port of the

controller and save for future use. The cap plug
is used on existing sensor ports that are no longer
used.

Materials and Special Tools Needed

Note: You may not require all the materials listed for

your controller installation.

• Several 6 mm (1/4 in.) female spade terminals for
input and output wiring and crimping tool or spade
mounted terminal blocks

• Small straight-blade screwdriver for securing wires in
the terminal blocks

• 8 mm (5/16 in.) wrench or 10 mm (3/8 in.) 12-point
socket to tighten the square coupler bolt

• Several shims or washers to mount the VMA

• Power screwdriver, 100 mm (4 in.) extension socket,
punch, drill, and 3.5 mm (9/64 in.) drill bits to mount
the VMA

• Pliers to open and close the damper

• Required length of 3.97 mm (5/32 in.) ID pneumatic
tubing and barbed fittings

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.

• Mount the VMA in an area free of corrosive vapors
that matches the ambient conditions specified in the

Technical Specifications section.

• Provide sufficient space around the VMA for cable
and wire connections and adequate ventilation
through the controller (50 mm [2 in.] minimum on the
top, bottom, sides, and front of the controllers).

• Do not mount the VMA in areas where
electromagnetic emissions from other devices or
wiring can interfere with controller communication.

• Avoid mounting the VMA on surfaces with excessive
vibration.

• Because the VMA controller is smaller than the
VMA1410, VMA1415, VMA1420, and the VMA1440
controllers, we recommend plugging the unused open
hole with the screw from the original VMA14 mounting
when using the VMA18 to replace a VMA14 Series
controller.

On panel or enclosure mount applications, observe these
additional guidelines:

• Do not install the VMA in an airtight enclosure.

• Mount the VMA so that the enclosure walls do not
obstruct cover removal or ventilation through the
controller.

• Mount the VMA so that the power transformer and
other devices do not radiate excessive heat to the
controller.

To mount the VMA18 Series controller, complete the
following steps:

1. Place the VMA18 Series controller in the proper

mounting position on the damper shaft so that the
wiring connections are easily accessible.
Note: The line from the captive spacer and screw

through the center of the damper shaft must
be either horizontal or vertical, and the wall
plate must be wall-mounted to comply with
requirements (Figure 1).

Figure 1: Possible VMA18 Series Controller

Mounting Positions

• Ensure the mounting surface can support the VMA
and any user-supplied enclosure.

• Mount the VMA on a hard, even surface whenever
possible.

• Use shims or washers to mount the VMA securely
and evenly on the mounting surface.

Make sure the VMA controller base is parallel to the
VAV box (perpendicular to the damper shaft). If

2VMA1826/1832 VAV Controller Installation Instructions

needed, use a spacer to offset tipping of the VMA
controller caused by the shaft bushings.
Note: Using the alignment marks to center the

captive spacer ensures sufficient VMA18
controller movement in either direction.

2. Secure the self-drilling No. 10 screw through the

shoulder washer (Figure 3) 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.
Note: The mounting screw for the VMA controller

does not use the same hole as the screw for
the VMA1410, VMA1415, VMA1420, and the
VMA1440 controller. We recommend
plugging the unused open hole with the screw
from the original VMA14 mounting when
using the VMA18 to replace a VMA14 Series
controller.

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 2).

Figure 2: Typical Damper End Shaft Icons

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. Tighten the square coupler bolt to the shaft using an
8 mm (5/16 in.) wrench or 10 mm (3/8 in.) 12-point
socket. Tighten to 10.5 to 11.5 N·m (95 to 105 lb·in).

8. Loop the pneumatic tubing to include a trap for
condensation. If needed, use the included brass
fittings and attach the included pieces of tubing to
the tubing of the VMA controller. Attach the tubing
from the VMA controller to the dual port fitting on the
VMA controller and the other ends of the tubing to
the pressure transducer in the VAV box application
(Figure 3). The VMA1826 does not come with the
tubing pieces.
Note: The VMA uses a digital non-flow pressure

sensor with bidirectional flow operation, which
allows the high- and low-pressure DP tube
connections to be made to either barbed
fitting on the VMA controller. You do not need
to make a specific high- or low-side
connection when you attach the tubing to the
barbed fittings on the VMA.

9. Push the manual release button, and turn the
actuator coupling manually to ensure that the
actuator can rotate from full-closed to full-open
positions without binding.

10. Complete the mounting by rotating the damper to
the full-open position.

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 3) 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.

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.

3VMA1826/1832 VAV Controller Installation Instructions

Figure 3: VMA18 Series Controller Wiring Terminations and Physical Features

4VMA1826/1832 VAV Controller Installation Instructions

Table 1: VMA18 Series Controller Feature Callout Numbers and Descriptions

Physical Features: Description and ReferencesCallout

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

24 VAC, Class 2 Supply Power Spade Terminals (see Supply Power Spade Terminals)

Device Address DIP Switch Block (see Setting the Device Address)

Binary Outputs, 24 VAC Triacs (see Table 4)

Configurable Outputs: Voltage Analog Output (0–10 VDC) and Binary Output (24 VAC Triac) (see

Table 4)

Dual Port Fitting (see Figure 3)

Not included in the VMA1826 model.

Manual Override Switch (see Mounting)

Controller Coupler (see Mounting)

Coupler Bolt (see Mounting)

Universal Input: Voltage Analog Input (0–10 VDC)

Resistive Analog Inputs (0–600k ohm) (see Table 4):

0–2k Potentiometer

RTD: 1k Nickel, 1k Platinum, or A99B SI

NTC: 10K Type L (10K JCI Type II is equivalent to Type L) or 2.252K Type II

Dry Contact Binary Input

N2/FC Bus Pluggable Screw Terminal Block (see N2/FC Bus Terminal Block)

EOL (End-of-Line) Switch (see Setting the EOL Switch)

SA Bus Spade Terminals (see SA Bus Spade Lugs)

TSTAT Modular Port: RJ-45 8-Pin Modular Jack (see Modular Port)

Captive Spacer and Screw (see Figure 3)

LED Status Indicators (see Table 8)

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.

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 N2
Bus, refer to the N2 Communications Bus Technical
Bulletin (LIT-636018).

VMA Terminals and Bus Ports

See Figure 3 for input and output terminal and bus port
locations on the VMA18 Series controllers. Observe the
following guidelines when wiring a VMA18 controller.

5VMA1826/1832 VAV Controller Installation Instructions

Input and Output Terminals

The input spade terminals are located on the bottom of
the VMA near the N2/FC Bus terminal block. The output
spade terminals are located on the top of the controller
near the power supply spade terminals. See Table 4 for
more information.

N2/FC Bus Terminal Block

The N2/FC Bus terminal block is a blue, removable,
4-terminal plug that fits into a board-mounted jack.

Wire the removable N2/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 4. See Table 5 and Table 6 for more
information.

Figure 4: N2/FC Bus Terminal Block Wiring

Figure 5: SA Bus Spade Lug Wiring

Note: Connecting an IOM to the VMA by using the SA

Bus connection is not supported.

Modular Port

The modular (TSTAT) port on the face of the VMA

(Figure 3) is an RJ-45, 8-position modular jack used to
connect your new or existing sensor to the VMA using
one of the two included adapters. Refer to the Sensor
Replacement section in the N2 VMA Application Note
(LIT-12011829).

Note: The Shield terminal (SHLD) on the N2/FC Bus

terminal block is isolated and can be used to
connect the cable shields on the bus (Figure 4).

SA Bus Spade Lugs

Wire the SA Bus spade lugs on the VMA and other SA
Bus devices in a daisy-chain configuration using 4-wire
twisted, shielded cable as shown in Figure 5. See Table

6 for more information.

Figure 6: Pin Number Assignments for the Modular

Port on VMA18 Controllers

6VMA1826/1832 VAV Controller Installation Instructions

Supply Power Spade Terminals

Wire the 24 VAC supply power wires from the transformer
to the HOT and COM terminals on the spade terminal as
shown in Figure 7. See Table 6 for more information.

Figure 7: 24 VAC Supply Power Spade Terminal

Wiring

Important: The supply power terminal block on the

VMA18 is a two-position spade lug (Figure

7). Exercise caution while rewiring the

power plug when replacing an existing
controller. Stray wire strands may make
contact and cause a short circuit across the
24 VAC power supply.
To maintain proper phasing when replacing
the existing VMA14xx controller with the
VMA18 controller, connect the power wire
from 24 VAC: 1 terminal on the existing
controller to the HOT power terminal on the
VMA18. Also connect the power wire from
the 24 VAC: 2 terminal on the existing
controller to the COM power terminal on the
VMA18 controller.

Figure 8: Transformer Grounding

Improper wiring of this terminal may cause a short circuit
across the 24 VAC power supply on -1 models.

To wire the VMA18 Series controller, complete the
following steps:

1. Terminate wiring per engineering drawings.

2. Wire network sensors and other devices to the VMA's

Sensor/Actuator (SA) Bus.

3. Wire the N2/FC Bus in a daisy chain (see Table 6).

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.

Refer to the N2 VMA Application Note (LIT-12011829)
for more information about replacing an existing controller
with an VMA18 controller.

VMA Terminal Functions, Ratings,
Requirements, and Wiring Guidelines

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. However, when
grounding the secondary of the 24 VAC
transformer is required, only one connection
to ground should be made near the
transformer.

Input and Output Wiring Guidelines

Table 4 provides information about the functions, ratings,

and requirements for the VMA input and output terminals,
and Table 5 provides guidelines for wire sizes and cable
lengths.

In addition to the wiring guidelines in Table 4, 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.

• Shielded cable is not required for input or output

cables.

7VMA1826/1832 VAV Controller Installation Instructions

• Shielded is recommended for input and output cables
that are exposed to high electromagnetic or radio
frequency noise.

• Cable runs of less than 30 m (100 ft) typically do not
require an offset in the input/output software setup.
Cable runs over 30 m (100 ft) may require an offset
in the input/output software setup.

Maximum Cable Length versus Load Current

Use Figure 13 to estimate the maximum cable length
relative to the wire size and the load current (in mA) when
wiring inputs and outputs.

N2/FC and SA Bus and Supply Power Wiring
Guidelines

Table 6 provides information about terminal block

functions, ratings, and requirements.

Table 6 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 6, observe these
guidelines when wiring the SA and N2/FC Buses and
supply power:

• Run all low-voltage wiring and cables separate from
high-voltage wiring.

• All N2/FC and SA Bus cables, regardless of wire size,
should be twisted, insulated, stranded copper wire.

• Shielded cable is strongly recommended for all N2/FC
and SA Bus cables.

•

Refer to the N2 Communications Bus Technical
Bulletin (LIT-636018) for detailed information
regarding wire size and cable length requirements for
the N2/FC and SA buses.

Termination Diagrams

A set of Johnson Controls® termination diagrams provides details for wiring inputs and outputs to the VMA18 Series

controllers. See the figures in this section for the applicable termination diagrams.

Table 2: Termination Details

Type of Field
Device

External Source

Input/Output

UIVoltage Input -

Termination DiagramsType of

UIVoltage Input -

Internal Source

UIVoltage Input

(Self-Powered)

8VMA1826/1832 VAV Controller Installation Instructions

Table 2: Termination Details

Type of Field
Device

Actuator (External
Source)

Input/Output

UITemperature Sensor

UIDry Contact

CO0–10 VDC Output to

Termination DiagramsType of

Actuator (Internal
Source)

(Switch Low,
External Source)

to Actuator (Switch
Low, External
Source)

CO0–10 VDC Output to

CO24 VAC Triac Output

Note: Only applies to CO4 and CO5.

COIncremental Control

Note: Applies to CO4 and CO5.

9VMA1826/1832 VAV Controller Installation Instructions

Table 2: Termination Details

Type of Field
Device

(Voltage)

to Actuator (Switch
Low, Internally
Sourced)

Output (Switch Low,
Internally Sourced)

with Modular Jack

Input/Output

COAnalog Output

BOIncremental Control

BO24 VAC Binary

SA BusTemperature Sensor

Termination DiagramsType of

Note: Applies to BO1, BO2, and BO3.

Note: Only applies to BO1, BO2, and BO3.

Note: The bottom jack (J2) on the TE-700 and TE-6x00 Series Sensors are not usable

as a zone bus or an SAB connection.

10VMA1826/1832 VAV Controller Installation Instructions

Table 2: Termination Details

Type of Field
Device

Terminals
Addressable

Terminals (Fixed
Address = 199)

Input/Output

SA BusNetwork Stat with

SA BusNetwork Stat with

Termination DiagramsType of

11VMA1826/1832 VAV Controller Installation Instructions

VMA Replacement Wiring
Diagram

Consider the following information when replacing a
VMA1410, VMA1415, VMA1420, and the VMA1440
controller with a VMA18 controller.

The VMA142x controller has five binary outputs (BOs)
and internally supplies 24 VAC. The VMA18 controller
has three binary outputs (BOs) and supplies 24 VAC to
these BOs. The VMA18 controller has two configurable
outputs (COs) and these two COs require an external
low voltage power source. Refer to Variable Air Volume
Modular Assembly (VMA) 1400 Series (LIT-635058) for
the Input/Output (I/O) point differences between the
VMA1410 and VMA1420.

See Figure 9 for wiring instructions.

12VMA1826/1832 VAV Controller Installation Instructions

Figure 9: VMA Replacement Wiring Diagram

13VMA1826/1832 VAV Controller Installation Instructions

Sensor Replacement and Reuse
Scenarios

This section describes sensor replacement and reuse
scenarios for replacing a VMA1410, VMA1415, VMA1420,
or the VMA controller with VMA18 controllers.

Table 3: Sensor Replacement and Reuse Scenarios

Sensor Used With VMA1410,
VMA1415, VMA1420, VMA1440
Controller

TE-6xxx Series (see TE-6xxx Series

Sensor Connected to VMA Controller)

AP-TMZ1600-0 (see Replacing an

AP-TMZ1600-0 Sensor Connected to a
VMA Controller)

TE-7710-0 Series Wireless Transmitter
and TE-7720-0 Wireless Receiver (see

Replacing a TE-7710-0 Series Wireless
Transmitter and TE-7720-0 Wireless
Receiver Connected to a VMA Controller)

TE-700 Series (see TE-700 Series Sensor

Connected to a VMA Controller)

Scenarios

Replace a sensor with an NS Series
Sensor

Note: Replacing a TE-6xxx Series

Sensor is recommended over
reusing the sensor because it
provides a usable port at the
sensor location for
commissioning.

Reuse a sensor, installing an adapter at
a VMA controller location

Replace a sensor with an NS Series
Sensor

Replace with a WRZ Series Wireless
Sensor and a WRZ7860 Series
One-to-One Receiver

Replace a sensor with a TE-730 Series
Sensor

Reuse a sensor

See Table 3 for a description of the most popular sensor
models used with the VMA1410, VMA1415, VMA1420,
and the VMA controllers, the sensor replacement and
reuse scenarios for that sensor model, and sensor
replacement and reuse instructions.

Important: Complete all the steps in the Mounting

section before following the instructions in
this section.

InstructionsSensor Replacement and Reuse

Replacing a TE-6xxx Series Sensor

Reusing a TE-6xxx Series Sensor

Replacing an AP-TMZ1600-0 Sensor
Connected to a VMA Controller

Replacing a TE-7710-0 Series Wireless
Transmitter and TE-7720-0 Wireless
Receiver Connected to a VMA Controller

Replacing a TE-700 Series Sensor

Reusing a TE-700 Series Sensor

Sensor Replacement Scenario
Descriptions

TE-6xxx Series Sensor Connected to
VMA Controller

To replace a TE-6xxx Series Sensor with a functionally
equivalent NS Series Network Sensor, follow the
instructions in the Replacing a TE-6xxx Series Sensor
section.

To reuse a TE-6xxx Series Sensor connected to a VMA
controller, follow the instructions in the Reusing a TE-6xxx

Series Sensor section.

Replacing the sensor with an NS Series Network
Sensor is preferred to reusing the TE-6xxx Series
Sensor because the NS sensor allows for easier

controller commissioning. Be sure to use an NS sensor
with similar dimensions as the existing sensor in order to
match the original sensor installation.

Note: If temporary occupancy is required for the

application on the TE-67xx and TE-68xx Series
Sensors, set the DIP switch positions on the back
of the sensor to down, up, and down. This setting
only applies to single and no setpoint controller
models (not dual setpoint controller models).

Refer to the NS Series Network Sensors Product Bulletin
(LIT-12011574) for a complete list of available NS Series
Network Sensors.

14VMA1826/1832 VAV Controller Installation Instructions

Note: In each of the following procedures that include

the use of the Commissioning Converter (BTCVT),
note the following:

The Mobile Access Portal (MAP) Gateway serves
as a replacement for the BTCVT, which is no
longer available for purchase, but continues to be
supported.

Replacing a TE-6xxx Series Sensor

To replace a TE-6xxx Series Sensor with a functionally
equivalent NS Series Network Sensor, complete the
following instructions.

Note:

• Replacing a TE-6xxx Series Sensor is recommended
over reusing the sensor.

• When replacing a TE-6xxx Series sensor with an NS
Series sensor and dissimilar paint or wall covering is
visible outside of the new sensor, consider using the
NS-WALLPLATE-0 for the new NS sensor. See Table

9 for more information.

1. Remove the TE-6xxx Series Sensor from the wall and
disconnect the 8-pin male jack from the back of the
sensor.

2. Plug the 8-pin male jack that was plugged into the
back of the sensor into the 8-pin female socket on
the single-socket adapter (Figure 10) provided with
the VMA18 controller.

3. Plug the 6-pin male jack on the single socket adapter
into the modular jack connection on the NS Series
Network Sensor.

4. Mount the NS Series Network Sensor in the same
location the TE-6xxx Series Sensor was previously
mounted, concealing the adapter assembly in the
existing wall opening behind the sensor. Refer to the
installation instructions for the applicable NS Series
Sensor model.

5. Plug the BTCVT into the 6-pin socket on the NS
Series Network Sensor.

Figure 10: Single-Socket Adapter

Note: When using an NS Series Network Sensor with

screw terminal block terminations, see the wiring
diagram in the installation instructions for the
applicable NS Series Sensor model.

15VMA1826/1832 VAV Controller Installation Instructions

Reusing a TE-6xxx Series Sensor

To reuse a TE-6xxx Series Sensor with the VMA
controller, complete the instructions in this section. The
Y adapter provided in the VMA18 accessory pack is
required for this procedure.
Note: The adapter must be installed at the VMA

controller location.

To install the adapter at the VMA controller location, see

Installing the Adapter at the VMA Controller Location.

Figure 11: Y Adapter

Installing the Adapter at the VMA Controller Location

To install the adapter at the VMA location, complete the
following instructions:

1. Disconnect the 8-pin male jack that is plugged into
the VMA1410, VMA1415, VMA1420, or VMA1440
controller.

2. Plug the 8-pin male jack that was plugged into the
VMA controller into the 8-pin female socket on the
Y adapter (Figure 12).

3. Plug the 8-pin male jack on the Y adapter into the
VMA18 controller socket labeled TSTAT (Figure 12).

4. Plug the BTCVT into the 6-pin socket on the Y
adapter. When commissioning is complete, allow the
6-pin socket to remain unconnected (Figure 12).

Replacing an AP-TMZ1600-0 Sensor
Connected to a VMA Controller

To replace an AP-TMZ1600-0 sensor connected to a
VMA controller, complete the following instructions.
Note: The AP-TMZ1600-0 sensor is not supported for

use with the VMA18 controller and must be
replaced with an NS Series Network Sensor. Refer
to the NS Series Network Sensors Product Bulletin
(LIT-12011574) for a complete list of available NS
Series Network Sensors.

1. Remove the AP-TMZ1600-0 sensor and disconnect
the 8-pin male jack from the back of the sensor.

2. Plug the 8-pin male jack from the VMA controller into
the 8-pin female socket on the single-socket adapter
(Figure 10) included with the VMA18 controller.

3. Plug the 6-pin male jack on the single socket adapter
into the modular jack connection on the back of the
NS Series Network Sensor.

4. Mount the NS Series Network Sensor in the same
location the AP-TMZ1600-0 Sensor was previously
mounted, concealing the adapter assembly in the
existing wall opening behind the sensor. Refer to the
installation instructions for the applicable NS Series
Sensor model.

5. Plug the BTCVT into the 6-pin socket on the NS
Series Network Sensor.

Note: When using an NS Series Network Sensor with

screw terminal block terminations, see the wiring
diagram in the installation instructions for the
applicable NS Series Sensor model.

16VMA1826/1832 VAV Controller Installation Instructions

Replacing a TE-7710-0 Series Wireless
Transmitter and TE-7720-0 Wireless Receiver
Connected to a VMA Controller

To replace a TE-7710-0 Series Wireless Transmitter and
TE-7720-0 Wireless Receiver connected to a VMA
controller, or to convert the wired sensors used with the
VMA18 controller to wireless, complete the following
instructions .
Note: The TE-7710-0 Series Wireless Transmitter and

TE-7720-0 Wireless Receiver must both be
replaced with aWRZ Series Wireless Sensor and
a WRZ7860-0 Series One-to-One Receiver. Refer
to the WRZ Series Wireless Room Sensors
Product Bulletin (LIT-12011653) for a complete
list of available WRZ Series Wireless Room
Sensors.

1. Disconnect the 6-foot interface cable connecting the
VMA controller and the TE-7720-0 Wireless Receiver.

2. Plug one end of the 6-foot interface cable into the
VMA18 socket labeled TSTAT.

3. Plug the other end of the 6-foot interface cable into
the 8-pin female socket of the single-socket adapter.

4. Plug the male end of the single-socket adapter directly
into the BTCVT.

5. Complete commissioning of the VMA18 controller and
disconnect the BTCVT.
Note: Sensor point information such as temperature,

setpoint, and occupancy is not available during
commissioning.

6. Install the WRZ Series Wireless Sensor and a
WRZ7860-0 Series One-to-One Receiver in the same
locations as the previous sensor and receiver. Refer
to the WRZ Series Wireless Room Sensors
Installation Instructions (Part No. 24-10332-2) and
the WRZ-7860-0 Installation Instructions (Part No.
24-10563-47).

7. Plug the 6-pin male jack on the adapter into the
WRZ7860-0 receiver.

Note: When using an WRZ Series Sensor with screw

terminal block terminations, refer to the wiring
diagram in the installation instructions for the
applicable WRZ Series Sensor model.

TE-700 Series Sensor Connected to a VMA
Controller

To replace a TE-700 Series Sensor with a TE-730 Series
Sensor, follow the instructions in Replacing a TE-700

Series Sensor.

To reuse a TE-700 Series Sensor connected to a VMA
controller, follow the instructions inReusing a TE-700

Series Sensor.

Replacing a TE-700 Series Sensor

Replace a TE-700 Series Sensor with a TE-730 Series
Sensor. No cable adapters are required for this scenario.

Note: Refer to the TE-730 Series Sensor Installation

Instructions (Part No. 24-10674-0) to install the

TE-730 Series Sensor.

Reusing a TE-700 Series Sensor

See the instructions in this section to reuse a TE-700
Series Sensor when connected to a VMA18 controller.

1. Disconnect the 8-pin male jack plugged into the VMA
controller.

2. Plug the 8-pin male jack on the Y adapter (Figure 10)
provided with the VMA controller into the 8-pin female
socket labeled TSTAT on the VMA18 controller.

3. Plug the 8-pin male jack that was plugged into the
VMA controller into the 8-pin female socket of the Y
adapter.
Note: The 6-pin connection is not used for this

scenario and it should remain unconnected.

4. Refer to the TE-730 Series Sensor Installation
Instructions (Part No. 24-10674-0) to install the
TE-730 Series Sensor.

Figure 12: Y Adapter at Controller Location

17VMA1826/1832 VAV Controller Installation Instructions

Table 4: I/O Terminal Blocks, Functions, Ratings, Requirements, and Cables

Terminal Block Label

Function, Ratings, and RequirementsTerminal

Labels

15 VDC Power Source for active (3-wire) input

devices connected to the Universal INn terminals.

Provides 35 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

Binary Input - Dry Contact Maintained Mode

1 second minimum pulse width

Internal 12 V, 15k ohm pull up

terminals

Note: All Universal ICOMn terminals are

isolated from all other commons on the

-0 models. The -1 model ICOMn
terminals are isolated from FC BUS
COM terminals only.

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

40 mA minimum load current

(Inputs)

BINARY

(Outputs)

+15 VUNIVERSAL

INn

ICOMn

OUTn

OCOMn

To Determine Wire Size
and Maximum Cable

Length

Same as (Universal) INn.

Note: Use 3-wire cable for

See Guideline A in Table 5.

See Guideline A in Table 5.

See Guideline A in Table 5.

Same as (Universal) INn.Universal Input Common for all Universal INn

See Guideline C in Table 5.

See Guideline C in Table 5.

1

devices that source
power from the +15 V
terminal.

18VMA1826/1832 VAV Controller Installation Instructions

Table 4: I/O Terminal Blocks, Functions, Ratings, Requirements, and Cables

Terminal Block Label

Function, Ratings, and RequirementsTerminal

Labels

CONFIGURABLE

(Outputs)

OUTn

OCOMn

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

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 A in Table 5.

See Guideline C in Table 5.

Same as (Configurable) OUTn.

1

1

Table 5 defines cable length guidelines for the various wire sizes that may be used for input and output wiring.

Table 5: Cable Length Guidelines for Recommended Wire Sizes

Wire Size/Gauge and TypeGuideline

AssumptionsMaximum Cable Length

and Type

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 297 m

(975 ft) twisted wire

183 m (600 ft) twisted wire0.6 mm (22 AWG) stranded copper 183 m

(600 ft) twisted wire

107 m (350 ft) twisted wire24 AWG stranded copper 107 m (350 ft)

twisted wire

229 m (750 ft) twisted wire1.0 mm (18 AWG) stranded copperB

137 m (450 ft) twisted wire0.8 mm (20 AWG) stranded copper 297 m

(975 ft) twisted wire

91 m (300 ft) twisted wire0.6 mm (22 AWG) stranded copper 183 m

(600 ft) twisted wire

61 m (200 ft) twisted wire24 AWG stranded copper 107 m (350 ft)

twisted wire

C

See Figure 13 to select wire size/gauge.

Use stranded copper wire.

See Figure 13 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

19VMA1826/1832 VAV Controller Installation Instructions

Figure 13: Maximum Wire Length by Current and Wire Size

Table 6: Communication Bus and Supply Power Terminal Blocks, Functions, Ratings, Requirements, and
Cables

Recommended Cable

2

Type

Use existing cable or 18 AWGN2/FC Bus Communications+

0.6 mm (22 AWG) stranded,
4-wire (2 twisted-pairs),
shielded cable recommended

Note: The + and - wires are

one twisted pair, and
the COM and SA PWR
are the second twisted
pair.

24 AWG 3-pair CAT 3 Cable
<30.5 m (100 ft)

N2/FC BUS

SA BUS

Terminal LabelsTerminal Block/Port Label

Function, Electrical
Ratings/Requirements

2

-

COM

SHLD

-

COM

SA PWR

TSTATTSTAT

Signal Reference (Common)
for bus communications

Isolated terminal (optional
shield drain connection)

SA Bus Communications+

SA Bus Signal Reference and
15 VDC Common

15 VDC Supply Power for
Devices on the SA Bus

RJ-45 8-Position Modular
Connector provides +15 VDC
Power for:

BTCVT

3

•

• VAV Balancing Tool

• One-to-One Wireless
Receiver

20VMA1826/1832 VAV Controller Installation Instructions

Table 6: Communication Bus and Supply Power Terminal Blocks, Functions, Ratings, Requirements, and
Cables

Terminal LabelsTerminal Block/Port Label

Function, Electrical
Ratings/Requirements

HOT24~

COM

1

To determine wire size and cable lengths for cables other than the recommended cables, see Table 5.

2 The N2/FC Bus wiring recommendations in this table are for N2 bus communications at 9,600 baud. For more information,

refer to the N2 Communications Bus Technical Bulletin (LIT-636018).

3 The MAP Gateway serves as a replacement for the BTCVT, which is no longer available for purchase, but continues to be

supported.

24 VAC Power Supply - Hot

Supplies 20–30 VAC (Nominal
24 VAC)

24 VAC Power Supply
Common The -0 models

isolate this terminal from all
other commons.

The -1 models only isolate this
terminal from the FC bus
common.

Recommended Cable

2

Type

0.8 mm to 1.0 mm

(20 to 18 AWG) 2-wire

2

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 subordinate devices on

N2 buses. Before operating field controllers on a bus,
you must set a valid and unique device address for each
controller on the bus.

You set a field 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 3). Device
addresses 1 through 253 are the valid N2 addresses for
these N2 controllers.

Valid MS/TP addresses for wired controllers are 4 through

127. For wireless controllers, valid addresses are 132
through 255 (132 [132-128=4] through 255
[255-128=127]).

For wireless controllers, the address 120 through 127

are used by the ZigBee® Coordinator. This may cause

a smaller field device range.

If the VMA18 Series controller may eventually be
converted to MS/TP, use addresses 4 through 127 for a
wired VMA controller or addresses 132 through 253 for
a future wireless VMA controller, if possible. Using these
addresses simplifies the MS/TP conversion process.

Note: Metasys field controllers ship with Switch 128 ON

and the remaining address switches OFF
rendering the controllers wired subordinate
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 field controller
before applying power to the controller on the bus.

The DIP switch block (Figure 14) has eight switches
numbered 128, 64, 32, 16, 8, 4, 2, and 1. Switches 128
through 1 are device address switches.

Figure 14: Device Address Switches Set to 21

To set the device addresses on Metasys®

1. Set all of the switches on the field controller’s device
address DIP switch block (128 through 1) to OFF.

2. Set one or more of the eight address switches (128
through 1) to ON, so that the sum of the switch
numbers set to ON equals the intended device
address.

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 to ON, followed by Switch 1
(16+4+1=21). See Figure 14.

21VMA1826/1832 VAV Controller Installation Instructions

3. Set a unique and sequential device address for each
of the field controllers connected on the N2 bus,
starting with device address 1.

To ensure the best bus performance (if the protocol
is changed to BACnet MS/TP), set sequential device
addresses with no gaps in the device address range
(4, 5, 6, 7, 8, 9, and so on). The field controllers do
not need to be physically connected on the bus in
their numerical device address order.

4. Write each field controller’s device address on the
white label below the DIP switch block on the
controller’s cover.

Refer to the N2 Communications Bus Technical Bulletin
(LIT-636018) for more information on field controller
device addresses and how to set them on N2 buses.

Setting the EOL Switch

Each field controller has an EOL (End of Line) switch,
which, when set to ON (up), sets the field controller as a
terminating device on the bus. See Figure 3 for the
end-of-line (EOL) switch location on the field controller.
The default EOL switch position is OFF (down).

Figure 15: EOL Switch Positions

Commissioning

Use the following procedure to commission the VMA18
controller:

1. Download the control application to the VMA controller
using the Controller Configuration Tool (CCT) .Refer
to the Controller Tool Help (LIT-12011147) for details.

2. Commission the VAV Box. Refer to the Controller
Tool Help (LIT-12011147) for details.

3. Perform airflow balancing on the VAV box. Refer to
the VAV Balancing Tool Technical Bulletin
(LIT-12011087) for details.

4. Perform commissioning checkout procedures. Refer
to the Controller Tool Help (LIT-12011147) for details.

CCT connects to the VMA using any one of the following
connection options: the MAP Gateway, BTCVT, the

Wireless ZigBee USB Dongle, or the wired BACnet®

Ethernet to MS/TP Router. These connection options
require additional hardware listed in Table 9.

For more detailed N2 VMA controller commissioning
information, refer to the N2 VMA Application Note

(LIT-12011829).

Note: The MAP Gateway serves as a replacement for

the BTCVT, which is no longer available for
purchase, but continues to be supported.

To set the EOL switch on a field controller:

1. Determine the physical location of the field controller
on the N2 or FC Bus.

2. Determine if the field controller must be set as a
terminating device on the bus.

Note: Refer to the N2 Communications Bus

Technical Bulletin (LIT-636018) for the N2 bus

EOL termination rules. Refer to the

MS/TP Communications Bus Technical
Bulletin (LIT-12011034) for the FC bus EOL

termination rules.

3. If the field controller is a terminating device on the N2
or FC Bus, set the EOL switch to ON. If the field
controller is not a terminating device on the bus, set
the EOL switch to OFF.
Note: When the EOL switch is set to ON, the LED

light on the face of the controller is illuminated.

Repair Information

If the VMA18 Series controller fails to operate within its
specifications, replace the unit. For a replacement unit,
contact the nearest Johnson Controls representative.

Troubleshooting

Table 8 provides LED status indicator information for

troubleshooting the VMA18 controller.
Note: If you experience short circuits in the 24 VAC

power supply causing protective devices such as
breakers or fuses to trip, make sure that the power
connections on the VMA are not reversed. The
most common cause of this problem is when the
24 VAC power supply on the VMA is reversed but
not reversed on a connected secondary device.
Improper wiring of this power terminal may cause
a short circuit across the 24 VAC power supply
on -1 models.

22VMA1826/1832 VAV Controller Installation Instructions

Table 7: Troubleshooting

VerificationCorrectionPossible CauseProblem

Transformer has trippedPower at Primary of
Transformer, 0V at
Secondary

Controller is Off 1.1.1. Disconnect the

secondary of the 24
VAC transformer

Ensure polarity of ~24 V COM /
ICOM / + 15VCOM/SA BUS
COM on the controller, auxiliary
devices and I/O is the same.

Transformer is shorted

2. 24VAC powered sensor is not
wired with the same polarity as
the controller

Breaker/Fuse has tripped.Power at Primary of
Transformer, 24 V at
Secondary, 0V at
Fuse/Breaker.

2. Use an ohm-meter to
measure between ~24 V
HOT and COM; there
should be no short
circuit.

2. Ensure OUT1-OUT3 terminals
of binary outputs are not
connected to ~24 VAC COM,
verify that OCOM1-OCOM3 are
not connected to ~24 VAC HOT
(these terminals are internally
sourced).

3. SA bus device is not wired with
the same polarity as the
controller

Note: Note that some

installations require
the secondary of the
Transformer to be
Earth Grounded. If
this is the case,
verify that the Earth
Ground connection
is valid and not
shared between
multiple pieces of
equipment.

3. Verify the short circuit has been
resolved with an ohm-meter.

4. Reset the breaker/fuse or
replace the transformer.

Note: When replacing the

transformer, it is
recommended to replace
with a model that utilizes a
resettable circuit breaker. A
circuit breaker makes
solving wiring problems
easier.

Ensure polarities of ~24 V
COM/OCOM match and that the
connected end device uses the
same polarity.

Power polarity mismatch between
connected device and configurable
output

Output is in protection
mode - a state the analog
portion of the configurable
output goes into when it
detects a wiring problem.
The analog output is set
to 0% regardless of the
command whenever a
wiring fault is detected.

0–10 V output is set
to 10–100%, but 0 V
is at output terminals

Configurable output

- analog mode is
invalid.

1. Measure the output and
verify that it matches the
command.

2. Disconnect the
connected device and
verify the commanded
value is present.

Connect OCOM terminal of the
configurable output to the common
of the connected end device.

OCOM terminal is not connectedCommon Reference is

incorrect

0–10V output has an
undesirable offset of
up to 1 V

23VMA1826/1832 VAV Controller Installation Instructions

Table 8: VMA18 Controller Status LEDs

On SteadyGreenPOWER

Off SteadyRedFAULT

Blink - 2 HzGreenN2/FC BUS

Blink - 2 HzGreenSA BUS

OffAmberEOL

Descriptions of LED StatesNormal StateLED ColorLED Label

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, SA Bus devices offline (such as Netsensors)

Off Steady = No faults

On Steady = Device fault or no application loaded

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

On Steady = EOL is active

Off Steady = EOL is not active

Accessories

Table 9: VMA18 Controller Accessories (Order Separately)

DescriptionProduct Code Number

Mobile Access portal (MAP)
Gateway

NS Series Network Sensors

Y64T15-0

Y65A13-0

Y65T42-0

Y65T31-0

AS-CBLVMA-2

NS-WALLPLATE-0

To identify the appropriate product for your region, refer to the Mobile Access Portal Gateway
Catalog Page (LIT-1900869).

Refer to the NS Series Network Sensors Product Bulletin (LIT-12011574) for specific sensor
model descriptions.

Transformer, 120/208/240 VAC Primary to 24 VAC Secondary, 92 VA, Foot Mount, 30 in. Primary
Leads and 30 in. Secondary Leads, Class 2

Transformer, 120 VAC Primary to 24 VAC Secondary, 40 VA, Foot Mount (Y65AS), 8 in. Primary
Leads and 30 in. Secondary Leads, Class 2

Transformer, 120/208/240 VAC Primary to 24 VAC Secondary, 40 VA, Hub Mount (Y65SP+),
8 in. Primary Leads and Secondary Screw Terminals, Class 2

Transformer, 120/208/240 VAC Primary to 24 VAC Secondary, 40 VA, Foot Mount (Y65AR+),
8 in. Primary Leads and Secondary Screw Terminals, Class 2

Replacement MS/TP FC Bus Terminal, 4-Position Connector, Blue, Bulk Pack (10 pack)AP-TBK4FC-0

AS-CBLTSTAT-0 Cable adapter for connection to 8-pin TE-6700 Series sensorsAS-CBLTSTAT-0

Cable Adapter, 8-pin Female Socket to 6-Pin Male Jack (Bulk Pack of 10)AS-CBLVMA-1

Cable Adapter, 8-pin Female Socket to 8-pin Male Jack with 6-Pin Female Socket for Wireless
Commissioning Converter (Bulk Pack of 10)

Network Sensor Wall Plate (80 mm x 80 mm [3.15 in. x 3.15 in.] square), used with an 80 mm
by 80 mm (3.15 in. x 3.15 in.) network sensor and must be mounted to a 0.6 m by 1.2 m
(2 ft by 4 ft) wall box

1 The MAP Gateway serves as a replacement for the BTCVT, which is no longer available for purchase, but continues to be

supported.

24VMA1826/1832 VAV Controller Installation Instructions

Technical Specifications

Table 10: VMA18 Series Controllers

Product Code Numbers

Supply Voltage

Power Consumption

Ambient Conditions

Terminations

Controller Addressing

Communications Bus

Analog Input/Analog Output
Accuracy

Air Pressure Differential
Sensor (VMA1832 Only)

1

MS-VMA1826-x, MS-VMA1826-xG:

32-bit, Integrated VAV Controller and Actuator, 3 UI, 3 BO, and 2 CO; 24 VAC; FC Bus, and
SA Bus; Includes cable adapters for use when replacing VMA14xx Series controllers.
Recommended replacement for VMA1440 controller (No DPT).

MS-VMA1832-x, MS-VMA1832-xG:

32-bit, Integrated VAV Controller/Actuator/DPT, 3 UI and 2 BO; 24 VAC; FC Bus, and SA Bus,
includes cable adapters for use when replacing VMA14xx Series controllers. Recommended
replacement for VMA1410, VMA1415, or VMA1420 controller.

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: The VA ratings do 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, SA bus, and Supply Power: 6.3 mm (1/4 in.) Spade Lugs

N2/FC Bus Pluggable Screw Terminal Block

TSTAT Modular Port: RJ-45 8-Pin Modular Jack

N2 Open Protocol: Valid field controller device addresses 1–254

BACnet MS/TP: DIP switch set; valid field controller device addresses 4–127 (Device addresses

0–3 and 128–255 are reserved and not valid field controller addresses.)

RS-485: selectable between BACnet MS/TP or N2

FC Bus: 1.5 mm (18 AWG) standard 3-wire, twisted, shielded cable recommended between
the supervisory controller and field controllers

SA Bus: 0.6 mm (22 AWG) stranded, 4-wire (2-twisted pairs) shielded cable recommended
from the VMA controller for network sensors and other sensor/actuator devices; includes a

terminal to source 15 VDC supply power from VMA to SA Bus devices

Analog Input: 15-bit resolution on UIs

Analog Output: 0–10 VDC ± 200 mV

Range: -1.5 in. to 1.5 in. W.C.

Performance Characteristics:

1

Accuracy: ±0.75% Full Span Maximum2(±0.0225 in. W.C.)

Typical accuracy at zero (null) pressure is ±0.003 in. W.C.

4 N·m (35 lb·in) minimum shaft length = 44 mm (1-3/4 in.)Actuator Rating

Mounts to damper shaft using single set screw and to duct with single mounting screwMounting

Dimensions

(Height x Width x Depth)

165 x 125 x 73 mm (6.5 x 4.92 x 2.9 in.)

Center of Output Hub to Center of Captive Spacer: 135 mm (5-5/16 in.)

0.65 kg (1.45 lb)Weight

25VMA1826/1832 VAV Controller Installation Instructions

Table 10: VMA18 Series Controllers

Compliance

1 For more information, refer to the N2 Communications Bus Technical Bulletin (LIT-636018).
2 Combined error due to calibration, accuracy, non-linearity, and temperature variation.

United States:

UL Listed, File E107041, CCN PAZX, UL 916, Energy Management Equipment; Suitable for
use in other environmental air space (plenums) in accordance with Section 300.22(C) of the
National Electric Code.

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;

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.

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, Inc. shall not be liable for
damages resulting from misapplication or misuse of its products.

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All other marks herein are the marks of their respective owners.© 2018 Johnson Controls

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26VMA1826/1832 VAV Controller Installation Instructions