Johnson Controls FEC26 Series User manual

FEC26 Field Equipment Controllers Installation Instructions
Part No. 24-10143-144, Rev. KMS-FEC2611-x, MS-FEC2621-x, MS-FEC2611-x OET,
Issued April 2016
Refer to the QuickLIT website for the most up-to-date version of this document.
Application
The FEC26 controllers are part of the Metasys®system
Field Equipment Controller (FEC) family. The FEC2511
is a modification of the FEC26 controllers. These
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.
The FEC controllers operate on an RS-485 BACnet®
Master-Slave/Token-Passing (MS/TP) Bus as BACnet
Application Specific Controllers (B-ASCs) and integrate
into Johnson Controls®and third-party BACnet systems.
The FEC26 controller is available with or without an
integral LCD and push button user interface.
Switchable Communications
Protocols
By default, the Metasys system FEC family controllers
and network sensors communicate using the standard
BACnet®protocol, based on the ANSI/ASHRAE
135-2004.
The BACnet protocol is a standard for ANSI, ASHRAE,
and the International Standards Organization (ISO) for
building controls.
FEC, IOM, and VMA16 controllers are BTL- tested and
listed as BACnet Application Specific Controllers
(B-ASCs). FAC field controllers are BTL-listed as BACnet
Advanced Application Controllers (B-AACs). The NS
Series Sensors are BTL-listed as BACnet Smart Sensors
(B-SSs).
Release 10.1 of CCT and later can be used to switch the
Field Bus communications protocol in FEC Family Field
Controllers to be either the standard BACnet
Master-Slave/Token-Passing (MS/TP) or the N2 protocol.
BACnet MS/TP is the default communications protocol
for all new controllers. Switchable communications
protocols provide a cost-effective upgrade and
modernization path for customers with existing N2
controllers. The Modernization Guide for Legacy N2
Controllers (LIT-12012005) and the controller-specific
documentation provide installation and commissioning
support and include tips for efficient and safe
replacement. Refer to the N2 Compatibility Options
chapter of the Controller Tool Help (LIT-12011147) for
information about mapping N2 Objects in controllers with
switchable communications protocols.
The N2-capable FEC family controllers can be used as
functional replacements for legacy N2 controllers. The
N2-capable FEC family controllers:
•have the I/O quantities and characteristics of the FEC
family controllers
• must be programmed with CCT, which has similar,
but not identical programming capabilities as
HVACPro, GX9100, GPL, and other legacy tools
• support SA Bus devices
• support WRZ wireless sensors from the controller
using the WRZ-7860 receiver
•are available in Buy American versions (most models)
The N2-capable FEC family controllers:
• do not support Zone Bus (for example, TMZ sensors
and M100 actuators) or XT-Bus (System 91) devices
(for example, XT, XTM, and XP modules)
• do not support a wireless connection to the N2 bus
• do not support NxE pass through
• are not listed for UL864 UUKL. N2 is not supported
as part of the Metasys®9th Edition listing for Smoke
Control System Equipment
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.
1FEC26Field Equipment Controllers Installation Instructions

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 a field 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.
Parts Included
• one field controller with removable terminal blocks
(Power, SA bus, and 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 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 proper mounting position.
• 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 .
• 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 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.
Figure 1: Field Controller Mounting Positions
DIN Rail Mount Applications
Mounting the field controller horizontal on 35 mm DIN rail
is the preferred mounting method.
To mount a 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 .
2. Pull the two bottom mounting clips outward from the
controller to the extended position ().
2FEC26Field Equipment Controllers Installation Instructions

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 (), 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:
1. Pull the two bottom mounting clips outward and
ensure they are locked in the extended position as
shown in .
2. Mark the mounting hole locations on the wall using
the dimensions in and one of the mount positions
shown in . Or hold the controller up to the wall or
surface in a proper mount position and mark 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.
3FEC26Field Equipment Controllers Installation Instructions

Figure 2: Back of FEC26 Controller Showing Extended
Mounting Clips, DIN Rail Channel, and Mounting
Dimensions, mm (in.)
Figure 3: FEC2621 Physical Features
Table 1: FEC2621 Physical Features
Physical Feature: Description and ReferencesCallout
Binary Output (BO) Source Power Selection Jumper Pin Blocks, 3 – BO Jumper Pin Blocks. See for more
information.
1
Device Address DIP Switch Block. See for more information.2
Mounting Clip. See for more information.3
Configurable Output (COs) Terminal Blocks. See for more information.4
Analog Outputs (AOs) Terminal Block. See for more information.5
24 VAC, Class 2 Supply Power Terminal Block. See for more information.6
4FEC26Field Equipment Controllers Installation Instructions

Table 1: FEC2621 Physical Features
Physical Feature: Description and ReferencesCallout
Cover Lift Tab (One of Two). See for more information.7
Display Navigation Buttons. See .
Note: Not available on all FEC models.
8
Liquid Crystal Display (LCD) Display Area
Note: Not available on all FEC models.
9
Field Controller (FC) Bus Terminal Block. (See .)10
Sensor Actuator (SA) Bus Terminal Block. (See .)11
Sensor Actuator (SA) Bus (RJ-12 6-pin Modular Jack). See .12
Binary Input (BI) Terminal Block, 2 – Binary Inputs. See for more information.13
Universal Input (UI) Terminal Blocks, 6 – Universal Inputs. See for more information.14
LED Status Indicators. See for more information.15
Field Controller (FC) Bus Port (RJ-12 6-pin Modular Jack). See for more information.16
Binary Output (BO) Terminal Blocks. See .17
5FEC26Field Equipment Controllers Installation Instructions

Wiring
Observe the following guidelines when wiring a controller:
Risk of Electric Shock: Disconnect the power supply
before making electrical connections to avoid electric
shock.
Mise En Garde: Risque de décharge électrique:
Débrancher l'alimentation avant de réaliser tout
raccordement électrique afin d'éviter tout risque de
décharge électrique.
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.
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 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: 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 MS/TP
Communications Bus Technical Bulletin (LIT-12011034).
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 fixed 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 for more
information about I/O terminal functions, requirements,
and ratings.
FC Bus Terminal Block
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
controller, and other controllers in a daisy-chain
configuration using 3-wire twisted, shielded cable as
shown below. See Table 5 for more information.
Figure 4: FC Bus Terminal Block Wiring
Note: The FC bus Shield (SHLD) terminal is isolated
and can be used to connect (daisy chain) the
shields for FC bus wiring.
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 the following figure. See Table 5 for more
information.
6FEC26Field Equipment Controllers Installation Instructions

Figure 5: 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.
FC Bus Port
The FC bus port on the front of the controller is an RJ-12,
6-position modular jack that provides a connection for
the Wireless Commissioning Converter, ZigBee®wireless
dongle, or ZFR1811 Wireless Field Bus Router.
FX-BTCVT Bluetooth®Commissioning Converter,
ZFR-USBHA-0 ZigBee™wireless dongle, or FX-ZFR1811
Wireless Field Bus Router.
The FC bus port is connected internally to the FC bus
terminal block. See for more information. The FC bus
Port pin assignment is shown in .
Figure 6: Pin Number Assignments for Sensor,
FC Bus, and SA Bus Ports on Controllers
Sensor 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.
A DIS1710 Local Controller Display also can be
connected to the SA Bus port (but only on FEC models
without integral display and push buttons).
The Sensor port is connected internally to the SA bus
terminal block. See Table 5 for more information. The
Sensor Port pin assignment is shown in Figure 6.
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 below. The middle terminal on the supply power
terminal block is not used. See Table 5 for more
information about the Supply Terminal Block.
Figure 7: 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.
7FEC26Field Equipment Controllers 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 field controller
does not require an earth ground
connection.
Wireless Network Applications
The controller can also be installed in a wireless
application using a ZFR1811 Wireless Field Bus Router.
To configure a controller for use with the ZFR1800 Series
Wireless Field Bus system:
1. Wire the input/output terminals and SA bus.
Note: In wireless network applications, do not
connect any wires to the FC bus terminal
block. (Connect the SA/FC terminal block on
an IOM to an SA bus only.)
2. Connect the ZFR1811 Wireless Field Bus Router to
the FC bus port (RJ-12 modular jack) on the front of
the controller.
3. Ensure that the controller's device address DIP
switches are set to the correct device address. See
.
4. Set DIP switch 128 to ON, which enables wireless
operation on the field controller.
For more information on installing a controller in a
wireless configuration, refer to the ZFR1811 Wireless
Field Bus Router Installation Instructions (Part No.
24-10325-10).
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
Termination DiagramsType of
Input/Output
Type of Field Device
UI
UIVoltage Input - External
Source
UIVoltage Input - Internal
Source
8FEC26Field Equipment Controllers Installation Instructions

Table 2: Termination Details
Termination DiagramsType of
Input/Output
Type of Field Device
UIVoltage Input
(Self-Powered)
UICurrent Input - External
Source (Isolated)
UICurrent Input - Internal
Source (2 wire)
UICurrent Input - Internal
Source (3 wire)
UICurrent Input - External
Source (in Loop)
UIFeedback from
EPP-1000
9FEC26Field Equipment Controllers Installation Instructions

Table 2: Termination Details
Termination DiagramsType of
Input/Output
Type of Field Device
UI or BIDry Contact (Binary
Input)
CO or AO0–20 VDC Output to
Actuator (External
Source)
CO or AO0–10 VDC Output to
Actuator (Internal
Source)
CO or AO4–20 mA Output to
Actuator
CO or AO4–20 mA Output to
Actuator
10FEC26Field Equipment Controllers Installation Instructions

Table 2: Termination Details
Termination DiagramsType of
Input/Output
Type of Field Device
AOVoltage (Analog Output)
AOAnalog Output (Current)
CO24 VAC Triac Output
(Switch Low, External
Source)
COIncremental Control to
Actuator (Switch Low,
Externally Sourced)
CO
CO
BO
11FEC26Field Equipment Controllers Installation Instructions

Table 2: Termination Details
Termination DiagramsType of
Input/Output
Type of Field Device
BO24 VAC Binary Output
(Switch Low, Externally
Sourced)
BOIncremental Control to
Actuator (Switch High,
Externally Sourced)
BO24 VAC Binary Output
(Switch High, Externally
Sourced)
SA BusNetwork Stat with
Phone Jack (Fixed
Address = 199)
12FEC26Field Equipment Controllers Installation Instructions

Table 2: Termination Details
Termination DiagramsType of
Input/Output
Type of Field Device
SA BusNetwork Stat with
Terminals Addressable
SA BusNetwork Stat with
Terminals (Fixed
Address = 199)
Terminal Wiring Guidelines,
Functions, Ratings, and
Requirements
Input and Output Wiring Guidelines
Table 1 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 1, 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.
FEC2511 and FEC26 Series Point Type
Counts per Model
Table 3 shows the different point types and counts
available in the FEC2511 and FEC26 Series controllers.
Field Equipment Controller (FEC)2511 and FEC26 Series
Point Type Counts per Model
13FEC26Field Equipment Controllers Installation Instructions

FEC26FEC2511
(Asia Only
model)
Signals
Accepted
Point Types
64 (Does not
support
Current Mode)
Analog Input,
Voltage Mode,
0–10 VDC
Universal
Input (UI)
Analog Input,
Current Mode,
4–20 mA
Analog Input,
Resistive
Mode, 0–2k
ohm,
resistence
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
FEC26FEC2511
(Asia Only
model)
Signals
Accepted
Point Types
26Dry Contact
Maintained
Mode
Binary Input
(BI)
Pulse
Counter/Accumulator
Mode (High
Speed), 100
Hz
22 (Voltage
Only)
Analog
Output,
Voltage Mode,
0–10 VDC
Analog
Output (AO)
Analog
Output,
Current Mode,
4–20 mA
32 (Ext Power
only)
24 VAC TriacBinary
Output (BO)
42Analog
Output,
Configurable
Output (CO)
Voltage Mode,
0–10 VDC
Binary Output
Mode, 24 VAC
Triac
1 Analog Input, Current Mode is set by hardware for the
FEC26.
14FEC26Field Equipment Controllers Installation Instructions

Table 3: FEC26 Terminal Blocks, Functions, Ratings, Requirements, and Cables
Determine Wire Size and
Maximum Cable Length
Function, Ratings,
Requirements
Terminal LabelTerminal Block Label
Same as (Universal) INn
Note: Use 3-wire cable for
devices that source
power from the +15V
terminal.
15 VDC Power Source for
active (3-wire) input devices
connected to the Universal INn
terminals.
Provides 100 mA total current
+15 VUNIVERSAL
(Inputs)
See Guideline Ain Table 4.
Analog Input - Voltage Mode
(0–10 VDC)
10 VDC maximum input voltage
Internal 75k ohms Pull-down
INn
See Guideline Bin Table 4.
Analog Input - Current Mode
(4–20 mA)
Internal 100 ohms load
impedance
Note: A current loop fail-safe
jumper can be
positioned to maintain
a closed 4 to 20 mA
current loop, even
when the power to the
controller is interrupted
or off. See the
Universal Input Current
Loop Jumpers section.
See Guideline Ain Table 4.
Analog Input - Resistive
Mode (0–600k ohms)
Internal 12 V. 15k ohms pull up
Qualified Sensors: 0-2k ohms
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 Ain Table 4.
Binary Input - Dry Contact
Maintained Mode
1 second minimum pulse width
Internal 12 V. 15k ohms pull up
Same as (Universal) INn
Universal Input Common for
all Universal Input terminals
Note: All Universal ICOMn
terminals share a
common, which is
isolated from all other
commons.
ICOMn
15FEC26Field Equipment Controllers Installation Instructions

Table 3: FEC26 Terminal Blocks, Functions, Ratings, Requirements, and Cables
Determine Wire Size and
Maximum Cable Length
Function, Ratings,
Requirements
Terminal LabelTerminal Block Label
See Guideline Ain Table 4.
Binary Input - Dry Contact
Maintained Mode
0.01 second minimum pulse
width
Internal 18 V. 3k ohms pull up
INn
BINARY
(Inputs)
Binary Input - Pulse
Counter/Accumulator Mode
0.01 second minimum pulse
width
(50 Hz at 50% duty cycle)
Internal 18 V. 3k ohms pull up
Binary Input Common for all
Binary Input (IN) terminals
Note: All Binary ICOMn
terminals share a
common, which is
isolated from all other
commons, except the
Configurable Output
(CO) common
(OCOMn) when the
CO is defined as an
Analog Output.
ICOMn
16FEC26Field Equipment Controllers Installation Instructions

Table 3: FEC26 Terminal Blocks, Functions, Ratings, Requirements, and Cables
Determine Wire Size and
Maximum Cable Length
Function, Ratings,
Requirements
Terminal LabelTerminal Block Label
See Guideline Cin Table 4.
Analog Output - Voltage
Mode (0–10 VDC)
10 VDC maximum output
voltage
10 mA maximum output current
Required an external load of
1,000 ohms or more.
Note: The Analog Output
(AO) operates in the
Voltage Mode when
connected to devices
with impedances
greater than 1,000
ohms. Devices that
drop below 1,000
ohms may not operate
as intended for Voltage
Mode applications.
OUTn
ANALOG
(Outputs)
Analog Output - Current
Mode (4–20 mA)
Requires and external load
between 0 and 300 ohms.
Note: The Analog Output
(AO) operates in the
Current Mode when
connected to devices
with impedances less
than 300 ohms.
Devices that fall below
300 ohms may not
operate as intended for
Current Mode
applications.
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.
OCOMn
17FEC26Field Equipment Controllers Installation Instructions

Table 3: FEC26 Terminal Blocks, Functions, Ratings, Requirements, and Cables
Determine Wire Size and
Maximum Cable Length
Function, Ratings,
Requirements
Terminal LabelTerminal Block Label
See Guideline Cin Table 4.
Binary Output - 24 VAC Triac
(External Power Source)
Connects OUTnto 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
OUTn
BINARY
(Output)
Power Selection Jumper
positioned to External (EXT)
power.
Binary Output Common (for
OUTnterminal)
Note: Each Binary Output
Common terminal
(OCOMn) is isolated
from all other
commons, including
other Binary Output
Common terminals.
OCOMn
See Guideline Cin Table 4.
Binary Output - 24 VAC Triac
(Internal Power Source)
Sources internal 24 VAC power
(24~ HOT).
OUTn
BINARY
(Output)
Power Selection Jumper
positioned to Internal (INT)
power. Binary Output - 24 VAC Triac
(Internal Power Source)
Connects OCOMnto 24~ when
activated.
Internal Power Source:
30 VAC maximum output
voltage
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
OCOMn
18FEC26Field Equipment Controllers Installation Instructions

Table 3: FEC26 Terminal Blocks, Functions, Ratings, Requirements, and Cables
Determine Wire Size and
Maximum Cable Length
Function, Ratings,
Requirements
Terminal LabelTerminal Block Label
See Guideline Ain Table 4.
Analog Output - Voltage
Mode (0–10 VDC)
10 VDC maximum output
voltage
10 mA maximum output current
Required an external load of
1,000 ohms or more.
OUTn
CONFIGURABLE
(Outputs)
See Guideline Cin Table 4.
Binary Output - 24 VAC Triac
(External Power Source only)
Connects OUTnto 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
Same as (Configurable) OUTn.
Analog Output Signal
Common All Configurable
Outputs (COs) defined as
Analog Outputs (AOs) share a
common, which is isolated from
all other commons except the
Binary Input common.
OCOMn
Binary Output Signal
Common All Configurable
Outputs (COs) defined as
Binary Outputs are isolated
from all other commons,
including other CO commons.
19FEC26Field Equipment Controllers Installation Instructions

Cable and Wire Length
Guidelines
Table 4 defines cable length guidelines for the various
wire sizes that may be used for wiring low-voltage (<30V)
input and outputs.
Table 4: Cable Length Guidelines for Recommended Wire Sizes for Low-Voltage (<30V) Inputs and Outputs
AssumptionsMaximum Cable
Length and Type
Wire Size/Gauge and TypeGuideline
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.
457 m (1,500 ft) twisted
wire
1.5 mm2(18 AWG) stranded copper
A
297 m (975 ft) twisted wire0.8 mm (20 AWG) stranded copper
183 m (600 ft) twisted wire0.6 mm (22 AWG) stranded copper
107 m (350 ft) twisted wireN/A (24 AWG) stranded copper
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.
229 m (750 ft) twisted wire
1.5 mm2(18 AWG) stranded copper
B
137 m (450 ft) twisted wire0.8 mm (20 AWG) stranded copper
91 m (300 ft) twisted wire0.6 mm (22 AWG) stranded copper
61 m (200 ft) twisted wireN/A (24 AWG) stranded copper
N/A
See Figure 8 to determine
cable length. Use twisted
wire cable.
See Figure 8 to select wire size/gauge.
Use stranded copper wire
C
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.
Note: Figure 8 applies to low-voltage (<30V) inputs and
outputs only.
Figure 8: Maximum Wire Length for Low-Voltage (<30V) Inputs and Outputs by Current and Wire Size
20FEC26Field Equipment Controllers Installation Instructions