Johnson Controls FX-PCX17 Series User manual

FX-PCX17 and FX-PCX27 Expansion Input/
Output Module Installation Instructions
Application
The FX-PCX17 and FX-PCX27 Expansion Input/Output Modules are part of the Facility Explorer® FX-
PC Series Programmable Controller family. FX-PCXs expansion modules expand the number of I/
O points connected to an FX-PCA, FX-PCG, or FX-PCV programmable controller or to a supervisory
controller.
The FX-PCX controllers operate on an RS-485 BACnet® MS/TP Bus and integrate into Johnson
Controls® and third-party BACnet systems.
Note: At Controller Configuration Tool (CCT) Release 10.1 and later, a new capability was
introduced allowing FX-PCVs, FX-PCGs, and FX-PCAs to communicate by using either the
BACnet or the N2 field bus networking protocol. The operation of the FX-PCX Input/Output
Module is not affected by the selection of the BACnet or the N2 protocol in the host controller
North American Emissions Compliance
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.
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.
Installation
Observe these guidelines when installing an FX-PCX controller:
• Transport the controller in the original container to minimize vibration and shock damage.
• Verify that all parts shipped with the controller.
• Do not drop the controller or subject it to physical shock.
Part No. 24-10144-106 Rev. G
2019-03-22 (barcode for factory use only)
FX-PCX1711 Series, FX-PCX2711 Series
*2410144106G*

Parts Included
• One controller with removable terminal blocks (Power and SA/FC bus are removable)
• One installation instructions sheet
Materials and special tools needed
• Three fasteners appropriate for the mounting surface (M4 screws or #8 screws)
• One 20 cm (8 in.) or longer piece of 35 mm DIN rail and appropriate hardware for DIN rail mount
(only)
• Small straight-blade screwdriver for securing wires in the terminal blocks
Mounting
Observe these guidelines when mounting an FX-PCX controller:
• Ensure the mounting surface can support the controller, DIN rail, and any user-supplied
enclosure.
• Mount the controller horizontally on 35 mm DIN rail whenever possible.
• Mount the controller in the proper mounting position (see Figure 1).
• Mount the controller on a hard, even surface whenever possible in wall-mount applications.
• Use shims or washers to mount the controller securely and evenly on the mounting surface.
• Mount the controller in an area free of corrosive vapors and observe the Ambient Conditions
requirements in Technical specifications.
• Provide for sufficient space around the controller for cable and wire connections for easy cover
removal and good ventilation through the controller (50 mm [2 in.] minimum on the top, bottom,
and front of the controller).
• Do not mount the controller on surfaces prone to vibration, such as duct work.
• Do not mount the controller in areas where electromagnetic emissions from other devices or
wiring can interfere with controller communication.
Observe these additional guidelines when mounting an FX-PCX controller in a panel or 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.
• Do not install the controller in an airtight enclosure.
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions2

Figure 1: Controller mounting positions
DIN rail mount applications
About this task:
Mounting the controller horizontal on 35 mm DIN rail is the preferred mounting method.
To mount an FX-PCX controller on 35 mm DIN rail:
1. Securely mount a 20 cm (8 in.) or longer section of 35 mm DIN rail horizontal and centered in
the desired space so that the controller mounts in the horizontal position shown in Figure 1.
2. Pull the bottom mounting clip outward from the controller to the extended position as shown
in Figure 2.
3. Hang the controller on the DIN rail by the hooks at the top of the (DIN rail) channel on the back
of the controller (Figure 2), and position the controller snugly against the DIN rail.
4. Push the bottom mounting clip inward (up) to secure the controller on the DIN rail.
To remove the controller from the DIN rail, pull the bottom mounting clip out to the extended posi-
tion and carefully lift the controller off the DIN rail.
Wall mount applications
About this task:
To mount an FX-PCX controller directly on a wall or other flat vertical surface:
1. Pull the bottom mounting clip outward and ensure it is locked in the extended position as
shown in Figure 2.
2. Position the controller in a proper mounting position shown in Figure 1 and mark the
mounting hole locations on the wall or surface using the dimensions shown in Figure 2. Or,
hold the controller up to the wall or surface in a proper mounting position and mark the hole
locations through the mounting clips.
3FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions

3. Drill holes in the wall or surface at the marked locations, and insert appropriate wall anchors in
the holes (if necessary).
4. Hold the controller in place, and insert the screws through the mounting clips and into the
holes (or wall anchors). Carefully tighten all of the screws.
Important: Do not overtighten the mounting screws. Overtightening the screws may damage
the mounting clips.
Mounting Features and Dimensions
Figure 2: Back of FX-PCX17 or FX-PCX27 Controller showing extended mounting Clips, DIN
rail channel and mounting dimensions, mm (in.)
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions4

FX-PCX17 and FX-PCX27 features graphic and table
Figure 3: FX-PCX17 and FX-PCX27 physical features
Table 1: FX-PCX17 and FX-PCX27 physical features
Callout Physical feature: description and references
1Device Address DIP Switch Block. See Setting the device addresses for more
information.
2Mounting Clip
324 VAC, Class 2 Supply Power Terminal Block. See Table 5 for more information.
4Cover Lift Tab. See Removing the Controller cover for more information.
5Sensor Actuator (SA) Bus / Field Controller (FC) Bus Terminal Block. See Table 5 for
more information.
6Binary Inputs (BIs) Terminal Block (Not available on FX-PCX17). See Table 3 for more
information.
7
End-of-Line (EOL) Switch. See Setting the End-of-Line (EOL) switch for more
information.
Note: The EOL Switch is located under the controller cover. You must remove the
cover to change the EOL switch position.
8Sensor Actuator (SA) Bus or Field Controller (FC) Bus Port (RJ-12 6-pin Modular Jack).
See Table 5 for more information.
9Light-Emitting Diode (LED) Status Indicators. See Table 7 for more information.
10 Universal Outputs (UO) Terminal Blocks (Not available on FX-PCX17). See Table 3 for
more information.
11 Universal Inputs (UI) Terminal Blocks (Not available on FX-PCX17). See Table 3 for more
information.
12 Relay Output Terminal Blocks (Not available on FX-PCX17). See Table 3 for more
information.
5FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions

Wiring
Warning
Risk of Electric Shock:
Disconnect or isolate all power supplies before making electrical connections. More than one
disconnection or isolation may be required to completely de-energize equipment. Contact with
components carrying hazardous voltage can cause electric shock and may result in severe personal
injury or death.
Warning
Risque de décharge électrique:
Débrancher ou isoler toute alimentation avant de réaliser un branchement électrique. Plusieurs
isolations et débranchements sont peut-être nécessaires pour -couper entièrement l'alimentation
de l'équipement. Tout contact avec des composants conducteurs de tensions dangereuses risque
d'entraîner une décharge électrique et de provoquer des blessures graves, voire mortelles.
CAUTION
Risk of Property Damage:
Do not apply power to the system before checking all wiring connections. Short circuited or improperly
connected wires may result in permanent damage to the equipment.
CAUTION
Risque de dégâts matériels:
Ne pas mettre le système sous tension avant d'avoir vérifié tous les raccords de câblage. Des fils
formant un court-circuit ou connectés de façon incorrecte risquent d'endommager irrémédiablement
l'équipement.
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:
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions6

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, and SA bus, refer to
the FX-PC Series Controllers MS/TP Communications Bus Technical Bulletin (LIT-12011670) or MS/TP
Communications Bus for BCPro System Technical Bulletin (LIT-12011908).
Terminal blocks and bus ports
See Figure 3 for terminal block and bus port locations on the controller. Observe the following
guidelines when wiring a controller.
Input and Output terminal blocks
All of the input terminal blocks are mounted on the bottom of the controller and the output
terminal blocks are mounted on the top of the controller. See Table 3 for more information about I/
O terminal functions, requirements, and ratings.
SA/FC bus terminal block
An FX-PCX can be connected to a Sensor/Actuator (SA) bus or a Field Controller (FC) bus, but not to
both buses simultaneously. The SA/FC bus terminal block is a removable, 4-terminal plug that fits
into a board-mounted jack.
When connecting the FX-PCX to an FC bus, wire the bus terminal block plugs on the controller and
the other controllers in a daisy-chain configuration using 3-wire twisted, shielded cable as shown in
the FC Bus Terminal Block wiring figure below. See Table 5 for more information.
Figure 4: FC bus terminal block wiring
When connecting the FX-PCX to an SA bus, wire the bus terminal block plugs on the controller and
other SA bus devices in a daisy-chain configuration using 4-wire twisted, shielded cable as shown in
Figure 5. See Input and Output wiring guidelines for more information.
7FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions

Figure 5: SA bus terminal block wiring
Note: The SA PWR/SHLD terminal does not supply 15 VDC. The SA PWR/SHLD terminal is
isolated and can be used to connect (daisy chain) the 15 VDC power leads on the SA bus
(Figure 5) or the cable shields on the FC bus (Figure 4). The SA bus supervisor supplies 15 VDC
to devices on the SA Bus requiring power.
SA/FC bus port
The SA/FC bus port on the front of the controller is an RJ-12, 6-position modular jack that provides a
connection for devices on the SA bus, a Bluetooth® Commissioning Converter, an FX- ZFR/ZFR Pro
Wireless Router (depending on which bus the FX-PCX is operating on).
The SA/FC bus port is connected internally to the SA/FC bus terminal block. See Table 5 for more
information. The SA/FC Bus Port pin assignment is shown in the Pin Number Assignments figure
below.
Figure 6: Pin number assignments for sensor, SA bus and FC bus ports on controllers
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions8

Supply power terminal block
The 24 VAC supply power terminal block is a gray, removable, 3-terminal plug that fits into a board-
mounted jack on the top right of the controller.
Note: If CE compliance is required for the FX-PCX1711-0, FX-PCX2711-1, or FX-PCX2711-2
product and application, the ferrite ring that is included in the package must be used in
the installation. The ferrite ring does not affect UL864 Smoke Control applications. It is not
required for applications in North America.
To install the ferrite ring, pass the two 24 VAC supply powerwires through the opening of the
ring and then complete five wraps or turns of both wires around the outside of the ring and
back through the center opening as shown in the following figure. Locate the ferrite ring as
near to the supply power terminal plug as possible while still allowing for a typical connection
to the controller with the terminal plug.
Figure 7: Wrapped ferrite ring
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. The middle terminal on the supply power terminal
block is not used. See Table 5 for more information about the Supply Terminal Block.
Figure 8: 24 VAC supply power terminal block wiring
Note: 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.
9FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions

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.
Wireless network applications
About this task:
The controller can also be installed in a wireless application using an FX- ZFR/ZFR Pro Wireless Field Bus
Router.
To configure a controller for use with the ZFR/ZFR Pro Series Wireless Field Bus system:
Note: FX-PCXs can communicate wirelessly on an FC bus only.
1. Connect the ZFR/ZFR Pro Wireless Field Bus Router to the FC bus port (RJ-12 modular jack) on
the front of the controller.
2. Ensure that the controller's device address DIP switches are set to the correct device address.
See Setting the device addresses.
3. Set DIP switch 128 to ON, which enables wireless operation on the controller.
For more information on installing a controller in a wireless configuration, refer to the FX-ZFR1811
Wireless Field Bus Router Installation Instructions (Part No. 24-10325-29).
Termination details
A set of Johnson Controls termination diagrams provides details for wiring inputs and outputs to
the controllers. See the figures in this section for the applicable termination diagrams.
Table 2: Termination details
Type of field
device
Type of
Input/
Output
Termination diagrams
Temperature
Sensor UI
Voltage Input -
External Source UI
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions10

Table 2: Termination details
Type of field
device
Type of
Input/
Output
Termination diagrams
Voltage Input -
Internal Source UI
Voltage Input
(Self-Powered) UI
Current Input -
External Source
(Isolated)
UI
Current Input -
Internal Source (2-
wire)
UI
Current Input -
Internal Source (3-
wire)
UI
Current Input -
External Source
(in Loop)
UI
11FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions

Table 2: Termination details
Type of field
device
Type of
Input/
Output
Termination diagrams
Feedback from
EPP-1000 UI
Dry Contact UI or BI
Incremental
Control to
Actuator (Switch
Low, External
Source)
UO
24 VAC Binary
Output (Switch
Low, Externally
Sourced)
UO
24 VAC Binary
Output (Switch
High, Externally
Sourced)
UO
Incremental
Control to
Actuator (Switch
High, Externally
Sourced)
UO
Analog Output
(Current) UO
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions12

Table 2: Termination details
Type of field
device
Type of
Input/
Output
Termination diagrams
4-20 mA Output to
Actuator UO
Voltage (Analog
Output) UO
4-20 mA Output to
Actuator) UO
0-10 VDC Output
to Actuator
(External Source)
UO
0-10 VDC Output
to Actuator
(Internal Source)
UO
13FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions

Table 2: Termination details
Type of field
device
Type of
Input/
Output
Termination diagrams
24 VAC Binary
Output (Switch
Low, Externally
Sourced)
RO
24 VAC Binary
Output (Switch
High, Externally
Sourced)
RO
Terminal wiring guidelines, functions, ratings, and
requirements
Input and Output wiring guidelines
Table 3 provides information and guidelines about the functions, ratings, and requirements for the
controller input and output terminals; and references guidelines for determining proper wire sizes
and cable lengths.
In addition to the wiring guidelines in Table 3, observe these guidelines when wiring controller
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
stranded, insulated, and twisted copper wires.
• Shielded cable is not required for input or output cables.
• Shielded cable is recommended for input and output cables that are exposed to high
electromagnetic or radio frequency noise.
• Inputs/outputs with cables less than 30 m (100 ft) typically do not require an offset in the
software setup. Cable runs over 30 m (100 ft) may require an offset in the input/output software
setup.
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions14

Wiring ratings and requirements table
Table 3: FX-PCX17 and FX-PCX27 terminal blocks, functions, ratings, requirements, and cables
Terminal block
label
Terminal
label Function, ratings, requirements
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 +15V
terminal.
Analog Input - Voltage Mode (0–10 VDC)
10 VDC maximum input voltage
Internal 75k ohm Pull-down
See Guideline A in
Table 4.
Analog Input - Current Mode (4–20 mA)
Internal 100 ohm load impedance
See Guideline B in
Table 4.
Analog Input - Resistive Mode (0–600k
ohm)
Internal 12 V, 15k ohm pull up
Qualified Sensors: 0-2k ohm 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,
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.
UNIVERSAL
(Inputs)
(FX-PCX27)
ICOMn
Universal Input Common for all Universal
Input terminals
Note: All Universal ICOMn terminals
share a common, which is isolated from
all other commons.
Same as (Universal)
INn
15FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions

Table 3: FX-PCX17 and FX-PCX27 terminal blocks, functions, ratings, requirements, and cables
Terminal block
label
Terminal
label Function, ratings, requirements
Determine wire size
and maximum cable
length
Binary Input - Dry Contact Maintained
Mode
0.01 second minimum pulse width
Internal 18 V, 3k ohm pull up
INnBinary Input - Pulse Counter/Accumulator
Mode
0.01 second minimum pulse width
(50 Hz at 50% duty cycle)
Internal 18 V, 3k ohm pull up
BINARY
(Inputs)
(FX-PCX17)
ICOMn
Binary Input Common for all Binary Input
(IN) terminals
Note: All Binary ICOMn terminals share
a common, which is isolated from all
other commons.
See Guideline A in
Table 4.
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions16

Table 3: FX-PCX17 and FX-PCX27 terminal blocks, functions, ratings, requirements, and cables
Terminal block
label
Terminal
label Function, ratings, requirements
Determine wire size
and maximum cable
length
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
10 mA maximum output current
Required an external load of 1,000 ohm or
more.
Note: The Analog Output (AO) operates
in the Voltage Mode when connected to
devices with impedances greater than
1,000 ohm. Devices that drop below
1,000 ohm may not operate as intended
for Voltage Mode applications.
See Guideline A in
Table 4.
Analog Output - Current Mode (4–20 mA)
Requires and external load between 0 and
300 ohm.
Note: The Analog Output (AO) operates
in the Current Mode when connected to
devices with impedances less than 300
ohm. Devices that exceed 300 ohm may
not operate as intended for Current
Mode applications.
See Guideline B in
Table 4.
OUTn
Binary Output Mode - 24 VAC/DC Field-
effect Transistor (FET)
Connects OUTn to OCOMn when activated.
30 VAC maximum output voltage
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current (hold current)
See Guideline B in
Table 4.
Universal
(Outputs)
(FX-PCX27)
OCOMn
Universal Output (UO) Common
Isolated from all other terminal commons,
including other UO Commons.
Same as OUT
17FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions

Table 3: FX-PCX17 and FX-PCX27 terminal blocks, functions, ratings, requirements, and cables
Terminal block
label
Terminal
label Function, ratings, requirements
Determine wire size
and maximum cable
length
OUT
NOn
Normal Open Contact
Connects OCOM to OUT NO when activated.
UL Listed (-0 model only)
1/4 hp 120 VAC, 1/2 hp 240 VAC
360 VA Pilot Duty at 120/240 VAC (B300)
3 A Non-inductive 24–240 VAC
CE Marking (-2 model only): 6 (4) A N.O. or
N.C. only, 240 VAC
OCOMn
Relay Common
Isolated from all other terminal commons,
including other Relay Commons.
RELAY
n
(Outputs)
(FX-PCX27)
OUT
NCn
Normal Closed Contact
Connects OCOM to OUT NC when activated.
UL Listed (-0 model only)
1/4 hp 120 VAC, 1/2 hp 240 VAC
360 VA Pilot Duty at 120/240 VAC (B300)
3 A Non-inductive 24–240 VAC
CE Marking (-2 model only): 6 (4) A N.O. or
N.C. only, 240 VAC
The Relay output
terminals can
accommodate the
following maximum
wire sizes:
Two wires per terminal:
1.3 mm (16 AWG)
maximum wire size
or
One wire per terminal:
2.0 mm (12 AWG)
maximum
Note: You must
determine the
required wire
size for the high-
voltage (>30
V) terminals
according to
relay ratings,
the applied load,
and the local,
national, or
regional electrical
codes.
Cable and wire length guidelines
Table 4 defines cable length guidelines for the various wire sizes that may be used for wiring low-
voltage (<30 V) input and outputs.
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions18

Cable length guidelines for recommended wire size
Table 4: Cable length guidelines and recommended wire sizes for low-voltage (<30 V) Inputs
and Outputs
Guide-
line 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
0.6 mm (22 AWG) stranded
copper
183 m (600 ft)
twisted wire
A
0.5 mm (24 AWG) stranded
copper
107 m (350 ft)
twisted wire
100 mV maximum voltage drop
Depending on cable 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
137 m (450 ft)
twisted wire
0.6 mm (22 AWG) stranded
copper
91 m (300 ft)
twisted wire
B
0.5 mm (24 AWG) stranded
copper
61 m (200 ft)
twisted wire
100 mV maximum voltage drop
Depending on cable and the
connected input or output device,
you may have to define an offset
in the setup software for the input
or output point.
C
See Figure 9 to select wire
size/gauge. Use stranded
copper wire
See Figure 9 to
determine cable
length. Use twisted
wire cable.
N/A
Note: The required wire sizes and lengths for high-voltage (> 30 V) Relay Outputs are
determined by the load connected to the relay and local, national, or regional electrical codes.
Maximum cable length versus load current
Use Figure 9 to estimate the maximum cable length relative to the wire size and the load current (in
mA) when wiring inputs and outputs.
Note: Figure 9 applies to low-voltage (<30 V) inputs and outputs only. The required wire size
and length for high-voltage (>30 V) Relay Outputs is determined by the load connected to the
relay and local electrical codes.
19FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions

Max wire length by current and wire size graphic
Figure 9: Maximum wire length for low-voltage (<30 V) Inputs and Outputs by current and
wire Size
SA/FC bus and supply power wiring guidelines
Table 5 provides information about the functions, ratings, and requirements for the communication
bus and supply power terminals; and guidelines for wire sizes, cable types, and cable lengths when
wiring the controller's communication buses and supply power.
In addition to the guidelines in Table 5, observe these guidelines when wiring an SA or FC bus and
the 24 VAC supply power:
• Run all low-voltage wiring and cables separate from high-voltage wiring.
• All SA and FC bus cables, regardless of wire size, should be twisted, insulated, stranded copper
wire.
• Shielded cable is strongly recommended for all SA and FC bus cables.
• Refer to the FX-PC Series ControllersMS/TP Communications Bus Technical Bulletin (LIT-12011670)
or MS/TP Communications Bus for BCPro System Technical Bulletin (LIT-12011908) for detailed
information regarding wire size and cable length requirements for the SA and FC buses.
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions20