Johnson Controls VMA1617 User manual

VMA1617 and VMA1632 VAV Controllers
Installation Guide
Applications
The VMA1617 and VMA1632 programmable digital
controllers are designed for Variable Air Volume
(VAV) applications that communicate through the
BACnet® MS/TP or N2 protocol. These Variable
Air Volume Modular Assembly (VMA) controllers
feature combinations of an integral digital pressure
sensor (DPT), a damper actuator, and a 32-bit
microprocessor. The controllers' small package size
facilitates quick field installation and efficient use
of space without compromising high-tech control
performance. These VMA controllers connect easily
to the non-communicating sensor for zone air
temperature sensing.
Switchable communications
protocols
By default, Metasys® system controllers and
network sensors communicate using the standard
BACnet protocol, based on the ANSI/ASHRAE
135-2004.
The BACnet® protocol is a standard for ANSI,
ASHRAE, and the International Standards
Organization (ISO) for building controls.
VMA16 controllers are BTL-tested and listed as
BACnet Application Specific Controllers (B-ASCs).
Release 10.1 and higher of Controller Configuration
Tool (CCT) can be used to switch the Field Bus
communications protocol in this controllers
to be either the standard BACnet MS/TP or
the N2 protocol. BACnet MS/TP is the default
communications protocol for all new controllers.
Switchable communications protocols provide a
cost-effective upgrade and modernization path
for customers with existing N2 controllers. The
Modernization Guide for Legacy N2 Controllers
(LIT-12012005) and the controller-specific
documentation provide installation and
commissioning support and include tips for
efficient and safe replacement. Refer to the N2
Compatibility Options chapter of the Controller
Tool Help (LIT-12011147) for information about
mapping N2 Objects in controllers with switchable
communications protocols.
The N2-capable controllers can be used as functional
replacements for legacy N2 controllers. The N2-
capable controllers have the following features and
benefits:
• Have the I/O quantities and characteristics of
Metasys family controllers
• Must be programmed with CCT, which has similar,
but not identical programming capabilities as
HVACPro, GX9100, GPL, and other legacy tools
• Support SA Bus devices
• Support WRZ wireless sensors from the controller
using the WRZ-7860 receiver
• Are available in Buy American versions (most
models)
The N2-capable controllers do not support the
following features:
• Zone Bus (for example, TMZ sensors and M100
actuators) or XT-Bus (System 91) devices (for
example, XT, XTM, and XP modules)
• Wireless connection to the N2 bus
• NxE passthrough
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.
*2410143349E*
Part No. 24-10143-349 Rev. E
2019-10-18
(barcode for factory use only)
MS-VMA1617, MS-VMA1632

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 the following guidelines when installing a
VMA1617 or VMA1632 controller:
• Transport the controller in the original container
to minimize vibration and shock damage to the
controller.
• Do not drop the controller or subject it to physical
shock.
Parts included
• One VMA1617 or VMA1632 controller with
removable SA bus and power terminal blocks
• One installation instructions sheet
• One self-drilling No. 10 x 25 mm (1 in.) screw
Materials and special tools needed
• Several 6 mm (1/4 in.) female spade terminals for
input and output wiring, and crimping tool for
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
Physical features
The following figure displays the physical features
of a VMA, and the accompanying table provides a
description of the physical features and a reference
to further information where required.
VMA1617 and VMA1632 VAV Controllers Installation Guide2

Figure 1: VMA1617/VMA1632 Controller Wiring Terminations and Physical Features
Table 1: VMA1617/VMA1632 Feature Callout
Numbers and Descriptions
Physical Features: Description and References
124 VAC, Class 2 Supply Power (see Supply power
terminal block)
2Device Address DIP Switch Block (see Setting the device
address)
3 Binary Outputs, 24 VAC Triacs (see )
4
Configurable Outputs: Voltage Analog Output (0–10
VDC) and Binary Output (24 VAC Triac)
(see )
5 Dual Port Fitting
6Manual Override Button (see Mounting for information
on using manual override Button)
7Controller Coupler (see Mounting for information on
using the controller coupler)
8Coupler Bolt (see Mounting for information on setting
the coupler bolt)
9
Universal Input: Voltage Analog Input (0–10 VDC)
Resistive Analog Inputs (0–600k ohm)
0–2k Potentiometer
RTD: 1k Nickel, 1k Platinum, or A99B SI
NTC: 10K Type L (10K Johnson Controls Type II is
equivalent to Type L) or 2.252K Type II
Dry Contact Binary Input
Table 1: VMA1617/VMA1632 Feature Callout
Numbers and Descriptions
Physical Features: Description and References
10
FC Bus Terminal Block. May also be used for N2
connections. Pluggable Screw (see FC bus terminal
block (Or N2 protocol as required))
11 EOL (End-of-Line) Switch (see Setting the EOL switch)
12 SA Bus Spade Terminals (see SA Bus spade lugs)
13 TSTAT Modular Port: RJ-45 8-Pin Modular Jack (see )
14 Captive Spacer and Screw
15 LED Status Indicators (see Table 10)
VMA1617 and VMA1632 VAV Controllers Installation Guide 3

Mounting
Observe the following guidelines when mounting a
VMA:
Note: 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
• Ensure that the mounting surface can support
the controller and any user-supplied enclosure.
electronics. Mount the controller vertically above
the damper shaft to allow any shaft condensation
to fall away from the controller. Additional
measures may be required in some installations.
• 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 that matches the ambient conditions
specified in the section.
• Provide sufficient space around the controller
for cable and wire connections and adequate
ventilation through the controller (at least 50 mm
[2 in.] on the top, bottom, sides, and front of the
controllers).
• Mount the VMA vertically above the damper shaft
to allow any shaft condensation to fall away from
the VMA.
Do not mount the controller in areas where
electromagnetic emissions from other
devices or wiring can interfere with controller
communication.
• Avoid mounting the controller on surfaces with
excessive vibration.
• When using the VMA1617 or VMA1632 to replace
a VMA1610 or VMA1620 controller, plug the
unused open hole in the duct work from the
original VMA mounting if possible. Plug the hole
using the sheet metal screw from the original
installation (preferred option).
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.
To mount the controllers, complete the following
steps:
1. Set all the switches on the field controller to
their known settings.
2. 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 controller
caused by the shaft bushings.
Note: Use the alignment marks to center
the captive spacer to ensure sufficient
movement in either direction.
3. Secure the self-drilling No. 10 screw through
the captive spacer 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
spacer.
Important: Do not overtighten the screw,
or the threads may strip. If mounting to
the VAV box, make sure the screws do not
interfere with damper blade movement.
4. Locate the damper position using the typical
marking on the end of the damper shaft as
shown in the following figure.
Figure 2: Typical Damper End Shaft Icons
VMA1617 and VMA1632 VAV Controllers Installation Guide4

5. 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.
6. Push down and hold the Manual Override
button (see ) and turn the controller coupler
until it contacts the mechanical end-stop at
either the full-closed (90° boxes) or full-open
(45° and 60° boxes) position.
7. 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 full-closed and full-open
damper positions. By installing the controller at
the full-open position, the controller provides
the open stop for 45° and 60° boxes. The closed
damper seal provides the full-closed stop.
Note: The integrated actuator has a
stroke time of 60 seconds for 90° of travel.
The stroke time is the amount of time
(in seconds) that it takes the actuator
to move from the fully closed to fully
opened position or from fully open to fully
closed position. For proper operation, the
actuator stroke time must be configured
in the CCT application based on the actual
time it takes the actuator to drive the
damper. The default setting is 60 seconds
(for 90° VAV boxes). For 45° and 60° VAV
boxes, the actuator stroke time must be
adjusted. Refer to Controller Tool Help
(LIT-12011147) for instructions on setting
the actuator stroke time in the application.
8. All models are compact in size and can be
easily installed on VAV boxes. The models have
either 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 in.) 12-point socket.
Tighten to 10.5 to 11.5 N·m (95 to 105 lb·in).
9. (Skip this step if you are installing the
VMA1626 model) Loop the pneumatic tubing
(supplied by field personnel) to include a
trap for condensation. Attach the needed
length of tubing (supplied and installed by
field personnel) to the dual port fitting on the
controller and the other ends of the tubing
to the pressure transducer in the VAV box
application.
Note: The controller uses a digital non-
flow pressure sensor with bidirectional
flow operation. You can connect the high-
and low-pressure DP tubes to either
barbed fitting on the 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 controller.
10. Push the Manual Override button, and turn the
actuator coupling manually to ensure that the
actuator can rotate from full-closed to full-open
positions without binding.
11. Complete the mounting by rotating the damper
to the full-open position.
CAUTION
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.
ATTENTION
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 dé-
marrage de l'unité de traitement d'air.
VMA1617 and VMA1632 VAV Controllers Installation Guide 5

Wiring
CAUTION
Risk of Electric Shock
Disconnect the power supply before making electrical
connections to avoid electric shock.
ATTENTION
Risque de décharge électrique
Débrancher l'alimentation avant de réaliser tout rac-
cordement 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 information on configuring and wiring
a BACnet/IP network, refer to the Metasys IP
Networks for BACnet/IP Controllers Configuration
Guide (LIT-12012458). For detailed information on
configuring and wiring a SA Bus, refer to the MS/TP
Communications Bus Technical Bulletin (LIT-12011034).
VMA terminals and bus ports
See for input and output terminal and bus port
locations on the controllers. Observe the following
guidelines when wiring a VMA controller.
Input and Output terminals
The input spade terminals are located on the
bottom of the VMA near the FC Bus terminal block.
The output spade terminals are located on the
top of the controller near the power supply spade
terminals. For more information, see Table .
FC bus terminal block (Or N2 protocol as
required)
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 controllers in a daisy-chain
configuration using 3-wire twisted, shielded cable as
shown in Figure 3. See Table for more information.
Figure 3: FC bus terminal block wiring
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).
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 4.
See Table for more information.
VMA1617 and VMA1632 VAV Controllers Installation Guide6

Figure 4: SA Bus Spade Lug Wiring
Modular ports
The modular (TSTAT) port on the face of the
VMAis an RJ-45, 8-position modular jack used
to easily connect one TE-730 series analog
(non-communicating) sensor to the VMA. The
modular TSTAT port provides 15 VDC, SA Bus
communications, and analog signals for zone
temperature, zone setpoint, and temporary zone
occupancy override.
Note: Do not use the modular SA Bus port and
the terminal block SA Bus simultaneously. Only
use one of these connections at a time.
Figure 5: Pin Number Assignments for the
Modular Port on VMA1617 and VMA1632
Controllers
Supply power terminal block
The 24 VAC supply power terminal block is a
gray, removable, 2-terminal plug that fits into a
board-mounted jack on the upper left of the VMA
controller.
Wire the 24 VAC supply power wires from the
transformer to the HOT and COM terminals on the
terminal plug as shown in the following figure. See
Table for more information.
Figure 6: 24 VAC Supply Power Spade Terminal
Wiring
Important: Exercise caution while rewiring
the power plug when replacing a VMA1610
or VMA1620 controller with a VMA1617 or
VMA1632 controller. The supply power terminal
on a new VMA is a two-position terminal block
(Figure 6). A VMA1610 or VMA1620 controller
uses a three-position terminal block, and the
center position is not used. Stray wire strands
may make contact and cause a short circuit
across the 24 VAC power supply.
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 controller 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 controller 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.
See the following figure.
VMA1617 and VMA1632 VAV Controllers Installation Guide 7

Figure 7: Transformer Grounding
CAUTION
Risk of Property Damage
Do not apply power to the system before checking all
wiring connections. Improper wiring of this terminal
may cause a short circuit across the 24 VAC power
supply on VMA models. A short circuit may result in a
tripped circuit breaker or blown fuse. If using a trans-
former with a built-in fuse, the transformer may need
to be replaced.
ATTENTION
Risque de dommages matériels
Ne mettez pas l’appareil sous tension avant d’avoir
vérifié toutes les connexions du câblage. Le câblage
inadéquat de cette borne peut causer un court-cir-
cuit sur l’alimentation électrique de 24 V c.a. des VMA
modèles. Un court-circuit peut causer le déclenche-
ment du disjoncteur ou le grillage d’un fusible. Si vous
utilisez un transformateur avec un fusible intégré,
vous pourriez devoir remplacer le transformateur.
To wire the controller, complete the following steps:
1. Terminate wiring according the appropriate
figure in Termination diagrams.
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 device address DIP switches
are set to the appropriate device address. Also,
activate the EOL switch if necessary.
5. Connect the controller to 24 VAC, Class 2 power.
Note: If you are using the VMA1617 or
VMA1632 controller with the Wireless Field
Bus System, refer to the WNC1800/ZFR182x
Pro Series Wireless Field Bus System Bulletin
(LIT-12012320) or the ZFR Series Wireless Field
Bus System Bulletin (LIT-12011336).
Terminal wiring guidelines,
functions, ratings, and
requirements
Input and Output wiring guidelines
See Table for information about the functions,
ratings, and requirements for the input and output
terminals, and for wire sizes and cable lengths
guidelines.
In addition, observe the following guidelines when
wiring 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 but 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.
VMA1617 and VMA1632 VAV Controllers Installation Guide8

Input and Output wiring guidelines
tables
Table 2: I/O terminal blocks, functions, ratings, requirements, and cables
Terminal block label Terminal labels Function, ratings, and requirements To determine wire size and maximum
cable length
+15 V
15 VDC Power Source for active (3-wire)
input devices connected to the Universal INn
terminals.
Provides 35 mA total current.
Same as (Universal) INn.
Note: Use 3-wire cable for devices
that source power from the +15 V
terminal.
Analog Input - Voltage Mode (0–10 VDC)
10 VDC maximum input voltage
Internal 75k ohm Pulldown
See Guideline A in Table 3.
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 Johnson Controls Type II is
equivalent to Type L) or 2.252K Type II
See Guideline A in Table 3.
INn
Binary Input - Dry Contact Maintained
Mode
1 second minimum pulse width
Internal 12 V, 15k ohm pull up
See Guideline A in Table 3.
UNIVERSAL
(Inputs)
ICOMn
Universal Input Common for all Universal IN
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.
Same as (Universal) INn.
OUTn
Binary Output - 24 VAC Triac (Internal
Power)
Sources internal 24 VAC power (24~ HOT)
See Guideline C in Table 3.
BINARY
(Outputs)
OCOMn
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
See Guideline C in Table 3.
VMA1617 and VMA1632 VAV Controllers Installation Guide 9

Table 2: I/O terminal blocks, functions, ratings, requirements, and cables
Terminal block label Terminal labels Function, ratings, and requirements To determine wire size and maximum
cable length
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
10 mA maximum output current
External 1k to 50k ohm load required
See Guideline A in Table 3.
OUTn
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
See Guideline C in Table 3.
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.
CONFIGURABLE
(Outputs)
OCOMnBinary Output Signal Common: All
Configurable Outputs defined as Binary
Outputs are isolated from all other commons,
including other Configurable Output
commons.
Same as (Configurable) OUTn.
Table 3: Cable Length Guidelines for Recommended Wire Sizes
Guideline Wire Size/Gauge and Type Maximum Cable Length and
Type Assumptions
1.0 mm (18 AWG) stranded copper 457 m (1,500 ft) twisted wire
0.8 mm (20 AWG) stranded copper
297 m (975 ft) twisted wire 297 m (975 ft) twisted wire
0.6 mm (22 AWG) stranded copper
183 m (600 ft) twisted wire 183 m (600 ft) twisted wire
A
0.5mm (24 AWG) stranded copper
107 m (350 ft) twisted wire 107 m (350 ft) twisted wire
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.
1.0 mm (18 AWG) stranded copper 229 m (750 ft) twisted wire
0.8 mm (20 AWG) stranded copper
297 m (975 ft) twisted wire 137 m (450 ft) twisted wire
0.6 mm (22 AWG) stranded copper
183 m (600 ft) twisted wire 91 m (300 ft) twisted wire
B
0.5 mm (24 AWG) stranded copper
107 m (350 ft) twisted wire 61 m (200 ft) twisted wire
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.
CSee Figure to select wire size/gauge.
Use stranded copper wire.
See Figure to determine cable
length.
Use twisted wire cable.
N/A
VMA1617 and VMA1632 VAV Controllers Installation Guide10

Cable and Wire Length Guidelines
The following table defines cable length guidelines
for the various wire sizes that may be used for
wiring low voltage (<30 V) input and outputs.
Table 4: Cable Length Guidelines
Guideline Wire Size/Gauge and Type Maximum Cable Length and
Type Assumptions
1.0 mm (18 AWG) stranded copper 457 m (1,500 ft) twisted wire
0.8 mm (20 AWG) stranded copper
297 m (975 ft) twisted wire 297 m (975 ft) twisted wire
0.6 mm (22 AWG) stranded copper
183 m (600 ft) twisted wire 183 m (600 ft) twisted wire
A
24 AWG stranded copper 107 m (350
ft) twisted wire 107 m (350 ft) twisted wire
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.
1.0 mm (18 AWG) stranded copper 229 m (750 ft) twisted wire
0.8 mm (20 AWG) stranded copper
297 m (975 ft) twisted wire 137 m (450 ft) twisted wire
0.6 mm (22 AWG) stranded copper
183 m (600 ft) twisted wire 91 m (300 ft) twisted wire
B
24 AWG stranded copper 107 m (350
ft) twisted wire 61 m (200 ft) twisted wire
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.
CSee Figure to select wire size/gauge.
Use stranded copper wire.
See Figure to determine cable
length.
Use twisted wire cable.
N/A
Maximum cable length versus load
current
Use Figure 8 to estimate the maximum cable length
relative to the wire size and the load current (in mA)
when wiring inputs and outputs.
Figure 8: Maximum Wire Length by Current and
Wire Size
Communication bus and supply power terminal blocks, ratings, and
requirements
Table 5: Communication bus and supply power terminal blocks, functions, ratings, requirements, and
cables
Terminal block/Port label Terminal labels Function, electrical ratings/
Requirements Recommended cable type11
+
-FC Bus Communications
COM Signal Reference (Common) for bus
communications
FC BUS 22
SHLD Isolated terminal (optional shield drain
connection)
0.6 mm (22 AWG) stranded, 3-wire
twisted, shielded cable recommended
VMA1617 and VMA1632 VAV Controllers Installation Guide 11

Table 5: Communication bus and supply power terminal blocks, functions, ratings, requirements, and
cables
Terminal block/Port label Terminal labels Function, electrical ratings/
Requirements Recommended cable type11
+
-SA Bus Communications
COM SA Bus Signal Reference and 15 VDC
Common
SA BUS33
POWER 15 VDC Supply Power for Devices on the
SA Bus
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 wires are the second
twisted pair.
TSTAT TSTAT
RJ-45 8-Position Modular Connector
provides +15 VDC Power for:
• Wireless Commissioning
Converter
• VAV Balancing Tool
• One-to-One Wireless Receiver
• Network Sensor
24 AWG 4-pair CAT 5 Cable <30.5 m
(100 ft)
HOT 24 VAC Power Supply - Hot
Supplies 20–30 VAC (Nominal 24 VAC)
24~
COM
24 VAC Power Supply Common
The terminal is isolated from the FC bus
common.
0.8 mm to 1.0 mm
(20 to 18 AWG) 2-wire
1 To determine wire size and cable lengths for cables other than the recommended cables, see Table .
2 The SA Bus and FC Bus wiring recommendations in this table are for MS/TP Bus communications at 38.4k baud. For more
information, refer to the MS/TP Communications Bus Technical Bulletin (LIT-12011034).
3 The SA bus wiring recommendations are for MS/TP Bus communications at 38.4k baud. For more information, refer to the MS/TP
Communications BusTechnical Bulletin (LIT-12011034).
VMA1617 and VMA1632 VAV Controllers Installation Guide12

Termination diagrams
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 6: Termination details
Type of field device Type of Input/
Output Termination diagrams
Voltage Input -
External Source UI
Voltage Input -
Internal Source UI
Voltage Input (Self-
Powered) UI
Temperature Sensor UI
Dry Contact UI
VMA1617 and VMA1632 VAV Controllers Installation Guide 13

Table 6: Termination details
Type of field device Type of Input/
Output Termination diagrams
0–10 VDC Output to
Actuator (Internal
Source)
CO
0–10 VDC Output to
Actuator (External
Source)
CO
24 VAC Triac Output
(Switch Low, External
Source)
CO
Note: Applies to CO4 and CO5.
Incremental Control to
Actuator (Switch Low,
External Source)
CO
Note: Applies to CO4 and CO5.
Analog Output
(Voltage) CO
Incremental Control to
Actuator (Switch Low,
Internally Sourced)
BO
Note: Applies to BO3, BO1, and BO2.
VMA1617 and VMA1632 VAV Controllers Installation Guide14

Table 6: Termination details
Type of field device Type of Input/
Output Termination diagrams
24 VAC Binary Output
(Switch Low, Internally
Sourced)
BO
Network Stat with
Phone Jack (Fixed
Address = 199)
SA Bus
Network Stat with
Terminals Addressable SA Bus
Network Stat with
Terminals (Fixed
Address = 199)
SA Bus
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® MSTP (SA or FC) Buses. Before operating
field controllers on a bus, you must set a valid and
unique device address for each controller on the
bus.
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
1). Device addresses 4 through 127 are the valid
addresses for these controllers.
The DIP switch block (Figure 9) has eight switches
numbered 128, 64, 32, 16, 8, 4, 2, and 1. Switches 64
through 1 are device address switches. Switch 128
VMA1617 and VMA1632 VAV Controllers Installation Guide 15

is a mode switch that enables a field controller to
operate on a ZFR/ZFR Pro Series Wireless Field Bus.
Switch 128 must be set to OFF for all hard-wired SA
and FC Bus applications. Set Switch 128 to ON for
wireless FC Bus applications only.
Figure 9: 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
subordinate devices, which do not interfere
on MSTP Buses and 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 Metasys field
controller:
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 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 7 and Table 8 for
valid field 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 9.
3. Set Switch 128 to ON only for controllers
on a ZFR/ZFR Pro Series Wireless Field Bus
application. For all hard-wired SA and FC Bus
applications, ensure that Switch 128 is set to
OFF.
Note: Do not connect a wirelessly enabled
field controller to a wired FC Bus.
Refer to the WNC1800/ZFR182x Pro Series
Wireless Field Bus System Technical Bulletin
(LIT-12012356) or the ZFR1800 Series
Wireless Field Bus System Technical Bulletin
(LIT-12011295) for more information on
device addresses in wireless applications.
4. Set a unique and sequential device address
for each of the field controllers connected on
the SA or FC Bus, starting with device address
4. To ensure the best bus performance, 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.
5. Write each field controller’s device address on
the white label below the DIP switch block on
the controller’s cover.
Refer to the MSTP Communications Bus Technical
Bulletin (LIT-12011034) for more information on field
controller device addresses and how to set them on
MSTP Buses.
Table 7 and Table 8 show and describe the valid
FC Bus and SA Bus device addresses for Johnson
Controls MSTP communications bus applications.
Table 7: FC Bus device address descriptions
Device address Address description
0
(Switch 128
OFF)
Reserved for FC Bus Supervisory Controller (not
valid for field controllers).
1 to 3
(Switch 128
OFF)
Reserved for peripheral devices (not valid for
field controllers).
4 to 127
(Switch 128
OFF)
Valid for MSTP Master field controllers on a
hard-wired SA Bus or FC Bus.
Table 8: Wireless field bus device address
Device address Address description
0 to 3
(Switch 128 ON)
Reserved addresses for wired subordinate
devices (not valid for field controllers).
Note: Metasyscontrollers ship with 128
ON and the remaining address switches
OFF, rendering the controllers wired
subordinate devices, which do not operate
on Metasys field buses.
VMA1617 and VMA1632 VAV Controllers Installation Guide16

Table 8: Wireless field bus device address
Device address Address description
4 to 127
(Switch 128 ON)
Valid for MSTP Master field controllers on
wireless FC Buses only.
Note: Do not connect a Metasys controller
with these device addresses to an active
wired SA or FC Bus. When a controller
with one of these device address is
connected to a wired field bus, the field
bus is rendered inoperable until the
controller is disconnected or Switch 128 is
set to OFF.
Setting the N2 Controller address to
be greater than 127
N2-configured controllers support the full range
of possible N2 device addresses provided by the
N2 protocol standard (1–254). However, these
controllers require special configuration for
addresses above 127.
Use the following instructions for controllers greater
than 127.
Note: This special configuration is required
because controller addresses above 127 were
originally intended for use with the Wireless
Field Bus system.
Note: Prior to performing this procedure,
be sure the controller has been converted
from BACnet to N2 protocol first. Refer to the
Modernization Guide for Legacy N2 Controllers
(LIT-12012005) for more information.
1. Disconnect the 24 VAC supply from the
controller.
2. Remove the FC Bus connector from the
controller.
3. Set the address switch set to the desired N2
address.
4. Set the address switch segment labeled 128 to
OFF.
5. Reconnect the 24 VAC supply to the controller.
6. Using an SA bus connection, download the
firmware and controller application file. The
download process asks to confirm switching the
communication protocol to N2.
7. Click OK.
8. After the download is finished, disconnect the
24 VAC supply to the controller.
9. Set the address switch segment labeled 128 to
ON.
10. Reattach the FC Bus connector to the controller.
11. Reconnect the 24 VAC supply to the controller.
Setting the EOL switch
Each field controller has an EOL switch, which,
when set to ON (up), sets the field controller as
a terminating device on the bus. See for the EOL
switch location on the field controller. The default
EOL switch position is OFF (down). The amber EOL
LED illuminates to show the EOL is active.
Figure 10: EOL switch positions
To set the EOL switch on a field controller:
1. Determine the physical location of the
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 MSTP 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 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.
Note: When the EOL switch is set to ON,
the LED light on the face of the controller
is illuminated.
VMA1617 and VMA1632 VAV Controllers Installation Guide 17

Commissioning Field Controllers
To commission the VMA1617 or VMA1632 controller,
use the following procedure:
1. Download the control application to the
controller using the Controller Configuration
Tool (CCT). Refer to the Controller Tool Help
(LIT-12011147) and Controller Provisioning with
Tools (LIT-12013247) .
2. Commission the VAV Box.
3. Perform airflow balancing 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)
and Controller Provisioning with Tools
(LIT-12013247).
You commission controllers with the CCT software.
The controller can be connected in one of four
ways; either through NxE Passthru, MAP 4.2+/
BACnet Router (Mobile Access Portal (MAP)
Gateway at version 4.2 or above), through Bluetooth
(using BTCVT), or Direct Ethernet connection to
the controller. Refer to the Controller Tool Help
(LIT-12011147) and Controller Provisioning with
Tools (LIT-12013247) for detailed information about
commissioning field controllers.
Note:
• The MAP Gateway serves as a replacement
for the BTCVT, which is no longer available
for purchase, but continues to be supported.
Repair information
If the controller fails to operate within its specifications, replace the unit. For a replacement unit, contact the
nearest Johnson Controls representative.
Troubleshooting
Table 10 provides LED status indicator information
for troubleshooting the controllers.
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.
VMA1617 and VMA1632 VAV Controllers Installation Guide18

General troubleshooting
Table 9: Troubleshooting
Problem Possible cause and correction Verification
Controller is OFF.
• Transformer has tripped:
• Power is at Primary of
Transformer, 0V at Secondary.
• Breaker/Fuse has tripped:
• Power is at Primary of
Transformer, 24V at Secondary,
0V at Fuse/Breaker.
Cause:
1. Transformer is shorted.
2. 24 VAC powered sensor is not
wired with the same polarity as the
controller.
3. SA Bus device is not wired with the
same polarity as the controller.
Correction:
1. Ensure polarity of ~24 V COM / ICOM /
+ 15VCOM/SA BUS COM on the
controller, auxiliary devices, and I/O is
the same.
2. Ensure OUT1-OUT3 terminals of binary
outputs are not connected to ~24
VAC COM, and verify that OCOM1-
OCOM3 are not connected to ~24 VAC
HOT (these terminals are internally
sourced).
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.
1. Disconnect the Secondary of the 24
VAC transformer.
2. Use an ohm-meter to measure
between ~24 V HOT and COM; there
must be no short circuit.
Note: 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.
Configurable output - analog mode is
invalid:
0–10 V output is set to 10–100%, but 0 V is at
output terminals.
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.
Cause:
There is a power polarity mismatch between
the connected device and the configurable
output.
Correction:
Ensure polarities of ~24 V COM/OCOM
match and that the connected end device
uses the same polarity.
1. Measure the output and verify that it
matches the command.
2. Disconnect the connected device
and verify the commanded value is
present.
Configurable output - analog mode is
invalid:
0–10V output has an undesirable offset of up
to 1 V.
The Common Reference is incorrect.
Cause:
The OCOM terminal is not connected.
Correction:
Connect the OCOM terminal of the
configurable output to the common of the
connected end device.
1. Measure the output and verify that it
matches the command.
2. Disconnect the connected device
and verify the commanded value is
present.
VMA1617 and VMA1632 VAV Controllers Installation Guide 19

LED status and states
Table 10: Status LEDs and description of LED states
LED label LED color Normal state Descriptions of LED states
POWER Green On Steady Off Steady = No power
On Steady = Power is supplied by primary voltage
FAULT Red Off Steady
Blink - 2 Hz = Download or startup in progress, not
ready for normal operation, SA Bus devices offline
(such as netsensors)
Rapid blink = SA Bus communications issue
Off Steady = No faults
On Steady = Device fault or no application loaded
FC BUS Green Blink - 2 Hz
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
SA BUS Green Blink - 2 Hz
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
EOL Amber Off On Steady = EOL is active
Off Steady = EOL is not active
Accessories
Table 11: VMA1617 and VMA1632 Controller Accessories (Order Separately)
Product code number Description
IOM Series Controllers Refer to the Metasys® System Field Equipment Controllers and Related Products Product Bulletin
(LIT-12011042) for a complete list of available IOM Series Controllers.
Mobile Access Portal (MAP) Gateway Refer to the Mobile Access Portal Gateway Catalog Page (LIT-1900869) to identify the
appropriate product for your region.
MS-DIS1710-0 Local Controller Display
MS-BTCVTCBL-700 Cable Replacement Set for the MS-BTCVT-1 or the NS-ATV7003-0; includes One 1.5 m (5 ft)
Retractable Cable
Y64T15-0 Transformer, 120/208/240 VAC Primary to 24 VAC Secondary, 92 VA, Foot Mount, 72.2 cm (30
in.), Primary Leads and 76.2 cm (30 in.) Secondary Leads, Class 2
Y65A13-0 Transformer, 120 VAC Primary to 24 VAC Secondary, 40 VA, Foot Mount (Y65AS), 20.32 cm (8
in.), Primary Leads and 76.2 cm (30 in.) Secondary Leads, Class 2
Y65T42-0 Transformer, 120/208/240 VAC Primary to 24 VAC Secondary, 40 VA, Hub Mount (Y65SP+),
20.32 cm (8 in.), Primary Leads and Secondary Screw Terminals, Class 2
Y65T31-0 Transformer, 120/208/240 VAC Primary to 24 VAC Secondary, 40 VA, Foot Mount (Y65AR+),
20.32 cm (8 in.), Primary Leads and Secondary Screw Terminals, Class 2
AP-TBK1002-0 2-position Screw Terminal that plugs onto VMA Output Point Spade Lugs
AP-TBK1003-0 3-position Screw Terminal that plugs onto VMA Output Point Spade Lugs
AP-TBK4SA-0 Replacement MS/TP SA Bus Terminal, 4-Position Connector, Brown, Bulk Pack of 10
AP-TBK4FC-0 Replacement MS/TP FC Bus Terminal, 4-Position Connector, Blue, Bulk Pack of 10
AP-TBK2PW-0 Replacement Power Terminal, 2-Position Connector, Gray, Bulk Pack of 10
AS-CBLTSTAT-0 Cable adapter for connection to 8-pin TE-6700 Series sensors
VMA1617 and VMA1632 VAV Controllers Installation Guide20