Johnson Controls FX-PCV1615 User manual

FX-PCV1615/1626/1628/1630 Programmable
VAV Box Controllers Installation
Instructions
Applications
The FX-PCV1615/1626/1628/1630 programmable digital controllers are designed for controlling
Variable Air Volume (VAV) boxes. These FX-PCV 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 FX-PCV1626 has an actuator but does not contain a DPT. The FX-
PCV1628 model has a DPT but does not contain an actuator. The controllers' small package size
facilitates quick field installation and efficient use of space without compromising high-tech control
performance. These FX-PCV controllers connect easily to the wired and wireless network sensors for
zone and discharge air temperature sensing.
Communications protocol
The FX-PC family controllers and network sensors communicate using the standard BACnet®
protocol, based on the ANSI/ASHRAE 135-2008. The BACnet protocol is a standard for ANSI,
ASHRAE, and the International Standards Organization (ISO) for building controls.
FX-PCV controllers are BTL-listed as BACnet Application Specific Controllers (B-ASCs).
The Controller Configuration Tool (CCT) can be used to switch the Field Bus communications
protocol in supported FX-PC Controllers to be either the standard BACnet MS/TP or the N2 protocol.
All new controllers use either BACnet MS/TP as the default communications protocol, or BACnet/
IP. Switchable communications protocols in the MS/TP models provide a cost-effective upgrade and
modernization path for customers with existing N2 controllers.
The Modernization Guide for Legacy N2 Controllers (LIT-12012045) 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 FX-PC Controllers can be used as functional replacements for legacy N2 controllers.
The N2-capable FX-PC Controllers:
• have the I/O quantities and characteristics of the FX-PC family controllers
• must be programmed with CCT, which has programming capabilities that are similar (but not
identical) to HVACPro, GX9100, GPL, and other legacy tools
• support SA Bus devices
• support FX-WRZ wireless sensors from the controller using the FX-WRZ7860 receiver when
configured for BACnet MS/TP communication
The N2-capable FX-PC controllers:
• do not support Zone Bus (for example, TMZ sensors and M100 actuators)
• do not support passthrough in the commissioning mode
• do not support remote downloading or commissioning using BACnet routing
• do not support wireless connection to the N2 bus
Part No. 24-10143-357 Rev. H
2019-03-22 (barcode for factory use only)
FX-PCV1615, FX-PCV1626, FX-PCV1628, FX-PCV1630
*2410143357H*

North American Emissions Compliance
United States
This equipment has been tested and found to comply with the limits for a Class A digital device
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when this equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in a residential area may cause harmful
interference, in which case the users will be required to correct the interference at their own
expense.
Canada
This Class (A) digital apparatus meets all the requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la Classe (A) respecte toutes les exigences du Règlement sur le
matériel brouilleur du Canada.
Installation
Observe these guidelines when installing an FX-PCV1615/1626/1628/1630 controller:
• Transport the FX-PCV controller in the original container to minimize vibration and shock damage
to the FX-PCV controller.
• Do not drop the FX-PCV controller or subject it to physical shock.
Parts included
• One FX-PCV1615/1626/1628/1630 controller with removable SA bus and power terminal blocks.
• One installation instructions sheet.
• One self-drilling No. 10 x 25 mm (1 in.) screw.
• The FX-PCV1628 model includes a 1.25 inch extended length 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 FX-PCV.
• Power screwdriver, 100 mm (4 in.) extension socket, punch, drill, and 3.5 mm (9/64 in.) drill bits to
mount the FX-PCV.
• Pliers to open and close the damper.
• Required length of 3.97 mm (5/32 in.) ID pneumatic tubing and barbed fittings.
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions2

Mounting
Observe these guidelines when mounting an FX-PCV:
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 FX-
PCV electronics. Mount the FX-PCV vertically above the damper shaft to allow any shaft
condensation to fall away from the FX-PCV. Additional measures may be required in some
installations.
• Ensure that the mounting surface can support the FX-PCV and any user-supplied enclosure.
• Mount the FX-PCV on a hard, even surface whenever possible.
• Use shims or washers to mount the FX-PCV securely and evenly on the mounting surface.
• Mount the FX-PCV in an area free of corrosive vapors that matches the ambient conditions
specified in the Technical specifications section.
• Provide sufficient space around the FX-PCV 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).
• Do not mount the FX-PCV in areas where electromagnetic emissions from other devices or wiring
can interfere with controller communication.
• Avoid mounting the FX-PCV on surfaces with excessive vibration.
• When using the FX-PCV1615/1626/1628/1630 to replace an FX-PCV1610 or FX-PCV1620 controller,
plug the unused open hole in the duct work from the original FX-PCV 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 FX-PCV in an airtight enclosure.
• Mount the FX-PCV so that the enclosure walls do not obstruct cover removal or ventilation
through the controller.
• Mount the FX-PCV so that the power transformer and other devices do not radiate excessive heat
to the controller.
To mount the FX-PCV1615/1626/1628/1630 controllers:
1. Set all the switches on the controller to their known settings.
2. Place the FX-PCV controller in the proper mounting position on the damper shaft so that the
wiring connections are easily accessible. Make sure the FX-PCV controller base is parallel to the
VAV box (perpendicular to the damper shaft). If needed, use a spacer to offset tipping of the
FX-PCV controller caused by the shaft bushings.
Note: Use the alignment marks to center the captive spacer to ensure sufficient FX-PCV
movement in either direction.
3. Secure the self-drilling No.10 screw through the captive spacer (Figure 2) with a power
screwdriver and 100mm (4in.) 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 3.5mm (9/64in.) drill bit.
Insert the mounting screw and tighten against the spacer. For the FX-PCV1628 models, use
the additional 1.25 inch screw to mount to one of the two holes provided near the actuator
opening (Figure 2) to mount the controller.
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.
3FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions

4. Locate the damper position using the typical marking on the end of the damper shaft as
shown in the figure below.
Figure 1: Typical damper end shaft icons
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 (Figure 2) and turn the FX-PCV 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.
8. For 45° and 60° boxes, hard stops must be provided at both full-closed and full-open
damper positions. By installing the FX-PCV controller at the full-open position, the FX-PCV
controller provides the open stop for 45° and 60° boxes. The closed damper seal provides
the full-closed stop.
9. All models are compact in size and are easily installed on VAV boxes. The FX-
PCV1615/1626/1630 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).
10. Skip this step if you are installing the FX-PCV1626 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 FX-PCV controller and
the other ends of the tubing to the pressure transducer in the VAV box application (Figure 2).
Note: The FX-PCV uses a digital non-flow pressure sensor (all models except the FX-
PCV1626) with bidirectional flow operation, which allows you to connect the high- and low-
pressure DP tubes to either barbed fitting on the FX-PCV 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 FX-PCV.
11. 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.
12. Complete the mounting by rotating the damper to the full-open position.
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions4

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.
CAUTION
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.
Wiring diagram
Figure 2: PCV1615/1626/1628/1630 Controller wiring terminations and physical features
5FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions

Table 1: FX-PCV1615/1626/1628/1630 Programmable VAV Box feature callout numbers and
descriptions
Callout Physical features: description and references
1 24 VAC, Class 2 Supply Power Terminal Block (see Supply power terminal block)
2 Device Address DIP Switch Block
3 Binary Outputs, 24 VAC Triacs (see Table 3)
4 Configurable Outputs: Voltage Analog Output (0–10 VDC) and Binary Output (24 VAC
Triac) FX-PCV1630, 1626, and 1628 only) (see Table 3)
5 Dual Port Fitting
6 Manual Override Button (see Mounting)
7 Coupler Bolt (see Mounting)
8 Controller Coupler (see Mounting)
9 Universal Input: Voltage Analog Input (0–10 VDC)
Resistive Analog Inputs (0–600k ohm) (see Table 3):
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
10 FC Bus Terminal Block. May also be used for N2 connections.
11 EOL (End-of-Line) Switch (see Setting the EOL switch)
12 SA Bus Terminal Block
13 Modular Port (FC Bus) RJ-12 6-Pin Modular Jack (see Modular ports)
14 Modular Port (SA Bus) RJ-12 6-Pin Modular Jack (see Modular ports)
15 Captive Spacer and Screw
16 LED Status Indicators (see Table 8)
Wiring
CAUTION
Risk of Electric Shock
Disconnect the power supply before making electrical connections to avoid electric shock.
CAUTION
Risque de décharge électrique
Débrancher l'alimentation avant de réaliser tout raccordement électrique afin d'éviter tout risque de
décharge électrique.
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions6

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 MS/TP Bus, FC Bus, or SA Bus, refer to the FX-
PC Series Controllers MS/TP Communications Bus Technical Bulletin (LIT-12011670).
FX-PCV terminals and bus ports
See Input and Output terminals for input and output terminal and bus port locations on the FX-
PCV1615/1626/1628/1630 controllers. Observe the following guidelines when wiring an FX-PCV
controller.
Input and Output terminals
The input spade terminals are located on the side of the FX-PCV near the terminal block. The output
spade terminals are located on the opposite side of the controller near the power supply terminal
block. See Table 3 for more information.
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 FX-PCV and other controllers in a daisy-
chain configuration using 3-wire twisted, shielded cable as shown in Figure 3. See Table 5 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).
7FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions

SA bus terminal block
The SA Bus terminal block is a brown, removable, 4-terminal plug with +15 VDC that fits into a
board-mounted jack. Wire the removable SA Bus terminal block plugs on the FX-PCV and other SA
Bus devices in a daisy-chain configuration using 4-wire twisted, shielded cable as shown in Figure 4.
See Table 5 for more information.
Figure 4: SA bus terminal block wiring
Modular ports
The modular and FC Bus ports on the face of the FX-PCV (Figure 2) are RJ-12 (6-position) modular
jacks as shown in Figure 5.
Figure 5: Pin number assignments for sensor (SA bus and
FC bus) ports on FX-PCV1615/1626/1628/1630 Controllers
The modular SA Bus port provides a connection for the Bluetooth Commissioning Converter (FX-
BTCVT), FX-ATV7003 VAV Balancing Tool, FX-DIS1710 Local Controller Display, FX-WRZ78xx Series
One-to-One Wireless Transmitter, and NS Series sensors. The modular FC Bus port provides a
connection for the Bluetooth Commissioning Converter and the FX-ZFR Wireless Router.
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.
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions8

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 FX-PCV controller.
Wire the 24 VAC supply power wires from the transformer to the HOT and COM terminals on the
terminal plug as shown in Figure 6. See Table 5 for more information.
Figure 6: 24 VAC supply power terminal block wiring
Important: Exercise caution while rewiring the power plug when replacing an FX-PCV1610
or FX-PCV1620 controller withan FX-PCV1615/1626/1628/1630 controller. The supply power
terminal on a new FX-PCV is a two-position terminal block (Figure 6). An FX-PCV1610 or FX-
PCV1620 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 FX-PCV 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 FX-PCV 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 for further details.
Figure 7: Transformer grounding
9FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions

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 FX-PCV models. A short circuit
may result in a tripped circuit breaker or blown fuse. If using a transformer with a built-in fuse, the
transformer may need to be replaced.
CAUTION
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-circuit sur l’alimentation électrique de 24 V c.a. des FX-
PCV16xx-1 modèles. Un court-circuit peut causer le déclenchement 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 FX-PCV1615/1626/1628/1630 controller:
1. Terminate wiring according the appropriate figure in Termination diagrams.
2. Wire network sensors and other devices to the FX-PCV's SA Bus.
3. Ensure that the FX-PCV’s device address DIP switches are set to the appropriate device address.
(See Setting the device address.) Also, activate the EOL switch if necessary.
4. Connect the FX-PCV controller to 24 VAC, Class 2 power.
Note: If you are using the FX-PCV1615/1626/1628/1630 controller with the Wireless Field
Bus System, refer to the WNC1800/FX-ZFR182x Pro Series Wireless Field Bus System Bulletin
(LIT-12012378) or the FX-ZFR1800 Series Wireless Field Bus System Bulletin (LIT-12011660).
FX-PCV terminal functions, ratings, requirements, and wiring
guidelines
Input and Output wiring guidelines
Table 3 provides information about the functions, ratings, and requirements for the FX-PCV input
and output terminals, and Table 4 provides guidelines for wire sizes and cable lengths.
In addition to the wiring guidelines in Table 3, observe these guidelines when wiring FX-PCV 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.
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions10

• 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 8 to estimate the maximum cable length relative to the wire size and the load current (in
mA) when wiring inputs and outputs.
SA bus and supply power wiring guidelines
Table 5 provides information about terminal block functions, ratings, and requirements.
Table 5 also provides wire size, cable type, and cable length guidelines for wiring the FX-PCV
communication buses and supply power.
In addition to the guidelines in Table 5, observe these guidelines when wiring the SA Buses and
supply power:
• Run all low-voltage wiring and cables separate from high-voltage wiring.
• All SA Bus cables, regardless of wire size, should be twisted, insulated, stranded copper wire.
• Shielded cable is strongly recommended for all SA Bus cables.
• Refer to the FX-PC Series Controllers Communications Bus Technical Bulletin (LIT-12011670) for
detailed information regarding wire size and cable length requirements for the SA Buses.
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 2: Termination details
Type of field
device
Type of
Input/
Output
Termination diagrams
Voltage Input -
External Source
UI
Voltage Input -
Internal Source
UI
11FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions

Table 2: Termination details
Type of field
device
Type of
Input/
Output
Termination diagrams
Voltage Input
(Self-Powered)
UI
Temperature
Sensor
UI
Dry Contact UI
0–10 VDC
Output to
Actuator
(External
Source)
CO
0–10 VDC
Output to
Actuator
(Internal
Source)
CO
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions12

Table 2: Termination details
Type of field
device
Type of
Input/
Output
Termination diagrams
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 (for FX-PCV1630 only), BO1, and BO2.
24 VAC Binary
Output (Switch
Low, Internally
Sourced)
BO
13FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions

Table 2: Termination details
Type of field
device
Type of
Input/
Output
Termination diagrams
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
Input and Output wiring guidelines tables
Table 3: 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
UNIVERSAL
(Inputs)
+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.
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions14

Table 3: 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 Input - Voltage Mode
(0–10 VDC)
10 VDC maximum input voltage
Internal 75k ohm Pulldown
See Guideline A in Table 4.
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 4.
INn
Binary Input - Dry Contact
Maintained Mode
1 second minimum pulse width
Internal 12 V, 15k ohm pull up
See Guideline A in Table 4.
ICOMnUniversal 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.
BINARY
(Outputs)
OUTnBinary Output - 24 VAC Triac
(Internal Power)
Sources internal 24 VAC power
(24~ HOT)
See Guideline C in Table 4.
15FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions

Table 3: 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
OCOMnBinary 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 4.
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 4.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 4.
CONFIGURABLE
(Outputs)
OCOMnAnalog 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.
Same as (Configurable) OUTn.
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions16

Table 3: 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
Binary Output Signal
Common: All Configurable
Outputs defined as Binary
Outputs are isolated from all
other commons, including other
Configurable Output commons.
Table 4: 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 8 to select wire
size/gauge.
Use stranded copper wire.
See Figure 8 to
determine cable
length.
Use twisted wire cable.
N/A
17FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions

Maximum wire length by current and wire size
Figure 8: Maximum wire length by current and wire size
Communication bus and supply power table
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
type1
1
+
-
FC Bus Communications
COM Signal Reference (Common)
for bus communications
FC BUS2
2
SHLD Isolated terminal (optional
shield drain connection)
0.6 mm (22 AWG)
stranded, 3-wire
twisted, shielded cable
recommended
+
-
SA Bus Communications
COM SA Bus Signal Reference and
15 VDC Common
SA BUS2
SA PWR 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.
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions18

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
type1
1
FC BUS FC BUS RJ-12 6-Position Modular
Port provides FC Bus
Communications
FC Bus provides 15 VDC
Power for:
• Wireless Bluetooth
Commissioning Converter
• Wireless ZigBee Field Bus
Router
24 AWG 3-pair CAT 3 Cable
<30.5m (100 ft)
SA BUS2SA BUS RJ-12 6-Position Modular
Port provides SA Bus
Communications
SA Bus provides 15 VDC
Power for:
• NS Series Sensors
• Wireless ZigBee FX-
ZFR-7860 Series One-to-
One Wireless Receiver
• Bluetooth Commissioning
Converter (FX-BTCVT)
• FX-DIS1710 Local
Controller Display
• FX-ATV VAV Balancing Tool
24 AWG 3-pair CAT 3 Cable
<30.5m (100 ft)
HOT 24 VAC Power Supply - Hot
Supplies 20–30 VAC
(Nominal 24VAC)
24~
COM 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.
0.8 mm to 1.0 mm
(20 to 18 AWG) 2-wire
1See Table 4 to determine wire size and cable lengths for cables other than the recommended cables.
2The 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 FX-PC Series Controllers MS/TP Communications Bus Technical Bulletin (LIT-12011670).
19FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions

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
FX-PC Series Controllers are master devices on BACnet® MSTP (SA or FC) Buses. Before operating
FX-PC controllers on a bus, you must set a valid and unique device address for each controller on
the bus.
Set an FX-PC controller’s device address by setting the positions of the switches on the Device
Address DIP switch block at the top of the controller (Figure 2). 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 is a mode switch that enables an FX-PC
controller to operate on an FX-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: FX-PC Series 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 an FX-PC Series Controller:
1. Set all of the switches on the controller’s device address DIP switch block (128 through 1) to
OFF.
2. Set one or more of the seven address switches (64 through 1) to ON, so that the sum of the
switch numbers set to ON equals the intended device address. See Table 6 and Table 7 for valid
FX-PC 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 an FX-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 FX-PC controller to a wired FC Bus.
Refer to the FX-ZFR Series Wireless Field Bus System Technical Bulletin (LIT-12011660) for more
information on device addresses in wireless applications.
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions20