Johnson Controls Metasys FAC4911 User manual
FAC4911 Advanced Application Field Equipment
Controller Installation Guide
Application
The FAC4911 Advanced Application Field Equipment
Controller is part of the Metasys® system Field
EquipmentController family. The FAC4911
equipment controllers run pre-engineered and user-
programmed applications, and provide the inputs
and outputs required to monitor and control a wide
variety of HVAC equipment.
FAC4911 controllers operate on BACnet®/IP
networks and integrate into Johnson Controls®
and third-party systems. The controllers include
an integral real-time clock, which enables the
controllers to monitor and control schedules,
calendars, and trends, and operate for extended
periods of time as stand-alone controllers when
offline from the Metasys system network.
The Metasys system FAC family controllers and
network sensors communicate using the BACnet
protocol. The BACnet protocol is a standard for
ANSI, ASHRAE, and the International Standards
Organization (ISO) for building controls. FAC
equipment controllers are BTL-listed and certified as
BACnet Advanced Application Controllers (B-AACs).
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 the following guidelines when installing a
field controller:
• To minimize vibration and shock damage,
transport the controller in the original container.
• Verify that all parts shipped with the controller.
• Do not drop the controller or subject it to physical
shock.
Parts included
• One field Controller. (Power and SA bus terminal
blocks are removable)
• One installation instructions sheet.
Materials and special tools needed
• Three fasteners appropriate for the mounting
surface (M4 screws or #8 screws)
• One 23 cm (9.125 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
*24101431086C*
Part No. 24-10143-1086 Rev. C
2019-10-18
(barcode for factory use only)
MS-FAC4911-0
FAC4911 physical features
The following figure displays the physical features
of FAC4911, and the accompanying table provides a
description of the physical features and a reference
to further information where required.
Figure 1: Physical Features
Table 1: Physical features
Physical feature: description and references
1Controller Number Rotary Switches: can be numbered
from 000 to 999 (see Setting the Controller Number)
2Binary Outputs (BO) Terminal Block: 24 VAC Triac (see I/
O terminal blocks, ratings, and requirements )
3
Configurable Outputs (CO) Terminal Block: 0–10 VDC
or 24 VAC Triac (see I/O terminal blocks, ratings, and
requirements )
4
Analog Output (AO) Terminal Block: Can be defined as
Voltage Analog Output (0–10 VDC) or Current Analog
Output (4–20 mA) (see I/O terminal blocks, ratings, and
requirements )
524 VAC, Class 2/SELV Supply Power Terminal Block (see
Supply power terminal block).
6Cover Lift Tab (One of Two)
7LED Status Indicators (see Troubleshooting Field
Controllers)
8SA Bus Terminal Block (see SA bus terminal block)
9Sensor Port: (SA Bus) RJ-12 6-Pin Modular Jack (see SA
bus terminal block )
10
Binary Input (BI) Terminal Block: Dry Contact Maintained
or Pulse Counter/Accumulator Mode (see I/O terminal
blocks, ratings, and requirements )
Table 1: Physical features
Physical feature: description and references
11
Universal Inputs (UI) Terminal Block: Can be defined
as Voltage Analog Input (0–10 VDC), Current Analog
Input (4–20 mA), Resistive Analog Inputs (0–600kΩ), or
Dry Contact Binary Input (see Input and output wiring
guidelines)
12 ETH2 Ethernet Port for BACnet IP Communications
13 ETH1 Ethernet Port for BACnet IP Communications
FAC4911 Advanced Application Field Equipment Controller Installation Guide2
FAC4911 model information
(including point type counts)
Table 2: FAC4911 model information (including point type counts)
Communication Protocol BACnet/IP
Engines Engines NAE55, NAE85, ODS
Modular Jacks 6-Pin SA Bus with four communicating
sensors
Point Types Signals Accepted Number of Points
Universal Input (UI)
Analog Input, Voltage Mode, 0–10 VDC
Analog Input, Current Mode, 4–20 mA
Analog Input, Resistive Mode, 0–2k ohm,
resistance temperature detector (RTD)
(1k NI [Johnson Controls], 1k PT, A99B SI),
negative temperature coefficient (NTC) (10k
Type L, 2.252k Type 2)
Binary Input, Dry Contact Maintained Mode
10
Binary Input (BI)
Dry Contact Maintained Mode
Pulse Counter/Accumulator Mode (High
Speed), 100 Hz
6
Analog Output (AO) Analog Output, Voltage Mode, 0–10 VDC
Analog Current Mode, 4–20 mA 4
Binary Output (BO) 24 VAC Triac 4
Configurable Output (CO) Analog Output, Voltage Mode, 0–10 VDC
Binary Output Mode, 24 VAC Triac 4
Mounting
Observe the following guidelines when mounting a
field 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 correct mounting
position (Figure 2).
• Whenever possible in wall-mount applications,
mount the controller on a hard, even surface.
• 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 sufficient space around the controller for
cable and wire connections, 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 ductwork.
• 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
a field 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.
FAC4911 Advanced Application Field Equipment Controller Installation Guide 3
Figure 2: Controller Mounting Positions
Mounting Features and Dimensions
See Figure 3 for mounting dimensions in millimeters
and inches. Inches are listed in parenthesis. Figure
3 also illustrates the DIN rail channel and the
mounting clips in an extended position.
Figure 3: Back of Controller
DIN Rail mount applications
Mounting the field controller horizontally on 35 mm
DIN rail is the preferred mounting method.
To mount a field controller on 35 mm DIN rail,
complete the following steps:
1. Securely mount a 23 cm (9.125 in.) or longer
section of 35 mm DIN rail, horizontally and
centered in the desired space, so that the
controller mounts in the position shown in
Figure 2.
2. Pull the two bottom mounting clips outward
from the controller to the extended position
(Figure 3).
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 3), and position the
controller snugly against the DIN rail.
4. Push the bottom mounting clips inward (up) to
secure the controller on the DIN rail.
To remove the controller from the DIN rail, pull the
bottom mounting clips out to the extended position
and carefully lift the controller off the DIN rail.
Wall mount applications
To mount a field controller directly on a wall or
other flat vertical surface, complete the following
steps:
1. Pull the two bottom mounting clips outward
and ensure they are locked in the extended
position.
2. Mark the mounting hole locations on the wall
in either the horizontal or vertical mounting
position. Or hold the controller up to the wall or
surface in a proper mount position and msark
the hole locations through the mounting clips.
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 anchors). Carefully tighten all of the
screws.
Important: Do not overtighten the mounting
screws. Overtightening the screws may
damage the mounting clips.
FAC4911 Advanced Application Field Equipment Controller Installation Guide4
Wiring
CAUTION
Risk of Electric Shock:
Disconnect the power supply before making electrical
connections to avoid electric shock
ATTENTION
Mise En Garde: Risque de décharge électrique
Débrancher l'alimentation avant de réaliser tout rac-
cordement électrique afin d'éviter tout risque de
décharge électrique.
CAUTION
Risk of Property Damage:
Do not apply power to the system before checking all
wiring connections. Short circuited or improperly con-
nected wires may result in permanent damage to the
equipment.
ATTENTION
Mise En Garde: Risque de dégâts matériels
Ne pas mettre le système sous tension avant d'avoir
vérifié tous les raccords de câblage. Des fils for-
mant un court-circuit ou connectés de façon incor-
recte 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: Electrostatic discharge can
damage controller components. Use proper
electrostatic discharge precautions during
installation, setup, and servicing to avoid
damaging the controller.
For detailed information about configuring and
wiring an MS/TP bus, FC bus and SA bus, refer to
the MS/TP Communications Bus Technical Bulletin
(LIT-12011034).
Network topology
FAC4911 controllers may be connected to a building
automation network in multiple ways: as daisy-
chained devices, as part of a star (also called home
run) network, or as part of a ring network.
To daisy-chain FAC4911 controllers, connect the
controllers to the bus supervisor in a chain with
the Ethernet cable connecting to the FAC4911
at the ETH1 or ETH2 port and connecting to the
next device from the other port. Benefits of daisy-
chained networks are that they require less physical
wiring and new devices can be added easily to the
network.
In a star network, each FAC4911 controller is
connected directly back to a main switch. This
configuration reduces the possibility of network
failure but requires more wiring to install.
A ring network is a chain of controllers virtually
closed by a software component in an Ethernet
switch. Not all switches support the ring topology.
The dual-port controller from Johnson Controls
supports Media Redundancy Protocol (MRP). MRP
allows a chain of Ethernet devices to overcome any
single communication failure, with a recovery time
faster than in a BACnet system.
For more information about network topologies
for the BACnet/IP Controllers, refer to the Metasys
IP Networks for BACnet/IP Controllers Configuration
Guide Technical Bulletin (LIT-12012458).
Terminal blocks and bus ports
See for terminal block and bus port locations on the
controller. Observe the following guidelines when
wiring a controller.
Input and Output terminal blocks
The fixed input terminal blocks are located on the
bottom of the controller, and the output terminal
blocks are located on the top of the controller. See
Table for more information about I/O terminal
functions, requirements, and ratings.
FAC4911 Advanced Application Field Equipment Controller Installation Guide 5
SA bus terminal block
The SA Bus terminal block is a brown, removable, 4-
terminal plug that fits into a board-mounted jack.
Wire the removable SA Bus terminal block plugs on
the controller, and other SA bus devices in a daisy-
chain configuration using 4-wire twisted, shielded
cable as shown in Figure 4. For more information
about the SA Bus terminal function, requirements,
and ratings, see .
Figure 4: SA bus terminal block wiring
Note: The SA PWR terminal supplies 15 VDC.
The SA PWR terminal can be used to connect
(daisy chain) the 15 VDC power leads on the SA
bus.
SA Bus Port
The Sensor (SA Bus) port on the bottom of the
controller is an RJ-12, 6-position modular jack
that provides a connection for the Wireless
Commissioning Converter, the VAV Balancing Tool,
specified network sensors, or other SA Bus devices
with RJ-12 plugs. When the FEC is configured for N2
network communication, the SA Bus port must be
used to download and commission the controller.
A DIS1710 Local Controller Display also can be
connected to the SA Bus port.
The Sensor port is connected internally to the SA
bus terminal block.
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.
Wire the 24 VAC supply power wires from the
transformer to the HOT and COM terminals on the
terminal plug as shown in Figure 5. Do not use the
middle terminal on the supply power terminal block.
See for more information about the Supply Power
Terminal Block.
Figure 5: 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.
Important: Connect 24 VAC supply power
to the field 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 field controller
does not require an earth ground connection.
Terminal Wiring Guidelines,
Functions, Ratings, and
Requirements
Input and output wiring guidelines
The following table 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.
FAC4911 Advanced Application Field Equipment Controller Installation Guide6
In addition to the wiring guidelines in the following
table, 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 required for input and output
cables that are exposed to high electromagnetic
or radio frequency noise.
• Inputs or 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.
FAC4911 Advanced Application Field Equipment Controller Installation Guide 7
I/O terminal blocks, ratings, and
requirements
Table 3: I/O 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 100 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 75kΩ pull-down
See Guideline A in Table .
Analog Input - Current Mode (4–20 mA)
Internal 100 Ω load impedance. See .
Note: A current loop fail-safe jumper must be in
the Enable position to maintain a closed 4 to 20 mA
current loop. See .
See Guideline B in Table .
Analog Input - Resistive Mode (60–600kΩ )
Internal 12 V. 15k Ω pull-up
Qualified Sensors: 0–2kΩ potentiometer, RTD (1k Nickel
[ Johnson Controls sensor], 1k Platinum, and A99B Silicon
Temperature Sensor) Negative Temperature Coefficient
(NTC) Sensor
See Guideline A in Table .
INn
Binary Input - Dry Contact Maintained Mode
1 second minimum pulse width
Internal 12 V. 15kΩ pull-up
See Guideline A in Table .
UNIVERSAL
(Inputs)
ICOMn
Universal Input Common for all Universal Input
terminals
Note: All Universal ICOMn terminals share a
common, which is isolated from all other commons,
except the SA bus common. One common screw
terminal point is provided for every two input screw
terminal points.
Same as (Universal) INn
Binary Input - Dry Contact Maintained Mode
0.01 second minimum pulse width
Internal 18 V. 3k Ω pull-up
INnBinary Input - Pulse Counter/Accumulator Mode
0.01 second minimum pulse width
(50 Hz at 50% duty cycle)
Internal 18 V. 3kΩ pull-up
BINARY
(Inputs)
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 .
FAC4911 Advanced Application Field Equipment Controller Installation Guide8
Table 3: I/O 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
Requires an external load of 1,000 Ω or more.
Note: The Analog Output (AO) operates in the
Voltage Mode when connected may not operate as
intended for Voltage Mode applications.
O
.
Note: The Analog Output (AO) operates in the
Current Mode when connected to devices with
impedances less than 300 Ω. Devices that exceed
below 300 Ω may not operate as intended for
Current Mode applications.
ANALOG
(Outputs)
OCOMn
Analog Output Signal Common for all Analog OUT
terminals.
Note: All Analog Output Common terminals
(OCOMn) share a common, which is isolated from
all other commons. One common screw terminal
point is provided for every two output screw
terminal points.
See Guideline C in Table .
OUTn
Binary Output - 24 VAC Triac Class 2, 24 V, 500 mA
(External Power Source)
Connects OUTn to OCOMn when activated.
External Power Source Requirements:
30 VAC maximum output voltage
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
BINARY
(Output)
OCOMn
Binary Output Common (for OUTn terminal)
Note: Each Binary Output Common terminal
(OCOMn) is isolated from all other commons,
including other Binary Output Common terminals.
See Guideline C in Table .
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
or more.
See Guideline A in Table
OUTn
Binary Output - 24 VAC Triac (External Power Source
only)
Connects OUTn to OCOMn when activated.
External Power Source Requirements:
30 VAC maximum output voltage
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
See Guideline C in Table
CONFIGURABLE
(Output)
OCOMn
Analog and Binary Output Signal Common All
Configurable Outputs (COs) defined as Binary Outputs
are isolated from all other commons, including other CO
commons.
Same as (Configurable) OUTn
FAC4911 Advanced Application Field Equipment Controller Installation Guide 9
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.
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.
Table 4: Cable length guidelines for recommended wire sizes for low-voltage (<30 V) Inputs and
Outputs
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.
CSee Figure 6 to select wire size/gauge. Use
stranded copper wire
See Figure 6 to determine cable
length. Use twisted wire cable. N/A
Maximum cable length versus load
current
Use Figure 6 to estimate the maximum cable length
relative to the wire size and the load current (in mA)
when wiring inputs and outputs.
Note: Figure 6 applies to low-voltage (<30 V)
inputs and outputs only.
Figure 6: Maximum wire length for low-voltage
(<30 V) Inputs and Outputs by current and wire
size
Communications bus and supply
power wiring guidelines
The provides information about the functions,
ratings, and requirements for the communication
bus and supply power terminals. The table also
provides guidelines for wire sizes, cable types, and
cable lengths for when you wire the controller's
communication buses and supply power.
In addition, observe these guidelines when you wire
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 MS/TP Communications Bus
Technical Bulletin (LIT-12011034) for detailed
information regarding wire size and cable length
requirements for SA and FC buses.
FAC4911 Advanced Application Field Equipment Controller Installation Guide10
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