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 )

Configurable Outputs (CO) Terminal Block: 0–10 VDC

or 24 VAC Triac (see I/O terminal blocks, ratings, and

requirements )

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 )

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

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

Binary Input (BI)

Dry Contact Maintained Mode

Pulse Counter/Accumulator Mode (High

Speed), 100 Hz

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.

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

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

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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