IOM3731-0A Input/Output Module Installation Instructions
Part No. 24-10144-165, Rev. CMS-IOM3731-0A
Software Release 6.0
Issued January 30, 2013
Supersedes December 5, 2011
Refer to the QuickLIT Web site for the most up-to-date version of this document.
Application
The IOM3731-0A field controller is a part of the Metasys®
system Field Equipment Controller family. Input/Output
Module (IOM) field controllers expand the number of
points connected to a Network A utomation Engine (NAE),
Network Control Engine (NCE), Field Equipment
Controller (FEC), or Advanced Application Field
Equipment Controller (F AC)to monitor and control a wide
variety of Heating, Ventilating, and Air Conditioning
(HVAC) equipment.
IOM field controllers operate on an RS-485 BACnet®
Master-Slave/Token-Passing (MS/TP) Bus as BACnet
Application Specific Controllers (B-ASCs), and integrate
into the Web-based Metasys system.
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 is likely to cause
harmful interference, in which case the user will be
required to correct the interference at his/her own
expense.
Important: In Metasys system smoke control
applications, use only the MS-IOM3710-0U
models that are UL Listed, UUKL/UUKLC
864 Listed, Smoke Control Equipment. For
Metasys system smoke control applications,
you must refer to the Metasys System UL
864 Ninth Edition UUKL/UUKL7 Smoke
Control System Technical Bulletin
(LIT-12011252) for detailed requirements
and procedures for installing and operating
UUKL/UUKLC 864 Listed Metasys system
devices. Failure to meet the requirements
or follow the procedures in the Metasys
System UL 864 Ninth Edition UUKL/UUKL7
Smoke Control System Technical Bulletin
(LIT-12011252) can void the UUKL/UUKLC
864 listing for Smoke Control 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.
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, 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
(Figure 1).
1IOM3731-0A Input/Output Module Installation Instructions
• 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 Table 8.
• 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
2. Pull the two bottom mounting clips outward from the
controller to the extended position (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 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 Figure 2.
2. Mark the mounting hole locations on the wall using
the dimensions in Figure 2 and one of the mount
positions shown in Figure 1. Or, hold the controller
up to the wall/surface in a proper mount position and
mark the hole locations through the mounting clips.
3. Drill holes in the wall/surface at the marked locations,
and insert appropriate wall anchors in the holes (if
necessary).
4. Hold the field controller in place, and insert the screws
through the mounting clips and into the holes (or
anchors). Carefully tighten all of the screws.
DIN Rail Mount Applications
Mounting the field controller horizontal on 35 mm DIN rail
is the preferred mounting method.
To mount a field 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.
Important: Do not overtighten the mounting screws.
Overtightening the screws may damage
the mounting clips.
Figure 2: Back of Controller Showing Extended
Mounting Clips, DIN Rail Channel, and Mounting
Dimensions, mm (in.)
2IOM3731-0A Input/Output Module Installation Instructions
Figure 3: IOM3731-0A Physical Features
Table 1: IOM3731 Feature Callouts and Descriptions
Physical Feature: Description and ReferencesCallout
1
2
3
4
5
6
7
8
9
Binary Outputs (BOs) Terminal Block. (See Table 2)
Mounting Clip (Three Total) (See Figure 3)
Device Address DIP Switch Block (See Setting the Device Addresses)
24 VAC, Class 2 Supply Power Terminal Block (See Supply Power Terminal Block)
Cover Lift Tab (One of Two) (See Removing the Controller Cover)
Sensor Actuator (SA) Bus or Field Controller (FC) Bus Terminal Block (See SA/FC Bus Terminal Block)
Binary Inputs (BIs) Terminal Block (See Table 2)
LED Status Indicators (See Table 6)
Sensor Actuator (SA) Bus or Field Controller (FC) Bus Port (RJ-12 6-pin Modular Jack) (See SA/FC Bus Port)
3IOM3731-0A Input/Output Module Installation Instructions
Wiring
Risk of Electric Shock: Disconnect or isolate all power
supplies before making electrical connections. More than
one disconnect 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.
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.
Important: Do not exceed the controller electrical
ratings. Exceeding controller electrical
ratings can result in permanent damage to
the controller and void any warranty.
When connecting the IOM to an FC bus, wire the bus
terminal block plugs on the controller, and the other field
controllers in a daisy-chain configuration using 3-wire
twisted, shielded cable as shown in Figure 4. See Table
4 for more information.
Figure 4: FC Bus Terminal Block Wiring
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).
IOM 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
On most field controller models, 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 2 for more information about I/O
terminal functions, requirements, and ratings.
When connecting the IOM 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 Table
3 for more information.
Figure 5: SA Bus Terminal Block Wiring
SA/FC Bus Terminal Block
An IOM 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.
4IOM3731-0A Input/Output Module Installation Instructions
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 (FAC, FEC, or VMA) 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 Wireless Commissioning
Converter, ZigBee™ wireless dongle, or a ZFR1811
Wireless Router (depending on which bus the controller
is operating on.)
The SA/FC bus port is connected internally to the SA/FC
bus terminal block. See Table 4 for more information.
The SA/FC bus port pin assignment is shown in Figure
6.
Figure 7: 24 VAC Supply Power Terminal Block Wiring
Figure 6: Pin Number Assignments for Sensor, SA
Bus and FC Bus Ports on Field Controllers
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 7. The middle terminal on the supply
power terminal block is not used. See Table 4 for more
information about the supply terminal block.
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.
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:
Note: IOMs can talk wirelessly on the FC bus only.
1. Connect the ZFR1811 Wireless Field Bus Router to
the FC bus port (RJ-12 modular jack) on the front of
the field controller.
2. Ensure that the field 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 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.
24-10325-1).
5IOM3731-0A Input/Output Module Installation Instructions
Terminal Wiring Guidelines, Functions, Ratings, and Requirements
Input and Output Wiring Guidelines
Table 2 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 2, 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.
Table 2: IOM3731-0A Terminal Blocks, Functions, Ratings, Requirements, and Cables
Terminal Block
Label
BINARY INPUT
BINARY
OUPUT(External
Power Source Only)
Label
INn
ICOMn
OUTn
OCOMn
Function, Ratings, RequirementsTerminal
Binary Input - Dry Contact Maintained Mode
0.01 second minimum pulse width Internal 18 V, 3k ohm pull
up
Binary 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 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.
Binary Output - 24 VAC Triac (External Power)
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 Common (for OUTn terminal)
Note: Each Binary Output common terminal (OCOMn) is
isolated from all other commons, including other
Binary Output commons.
Determine Wire Size and
Maximum Cable Length
See Guideline A in Table 3
See Guideline C in Table 3
1
1
See Table 3 to determine wire size and cable lengths for cables.
6IOM3731-0A Input/Output Module Installation Instructions
Cable and Wire Length Guidelines
Table 3 defines cable length guidelines for the various
wire sizes that may be used for wiring low-voltage (<30V)
input and outputs.
Table 3: Cable Length Guidelines for Recommended Wire Sizes for Low-Voltage (<30V) Inputs and Outputs
Wire Size/Gauge and TypeGuideline
AssumptionsMaximum Cable
Length and Type
A
B
C
1.5 mm2(18 AWG) stranded copper
1.5 mm2(18 AWG) stranded copper
See Figure 8 to select wire size/gauge.
Use stranded copper wire.
457 m (1,500 ft) twisted
wire
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
229 m (750 ft) twisted wire
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
See Figure 8 to determine
cable length. Use twisted
wire cable.
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.
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.
N/A
Maximum Cable Length versus
Note: Figure 8 applies to low-voltage (<30V) inputs and
outputs only.
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.
Figure 8: Maximum Wire Length for Low-Voltage (<30V) Inputs and Outputs by Current and Wire Size
7IOM3731-0A Input/Output Module Installation Instructions
SA/FC Bus and Supply Power Wiring Guidelines
Table 4 provides information about the functions, ratings,
and requirements for the controllers communication bus
and supply power terminals; and guidelines for wire sizes,
cable types, and cable lengths when wiring the controller
communication buses and supply power.
In addition to the guidelines in Table 4, 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 MS/TP Communications Bus Technical
Bulletin (LIT-12011034) for detailed information
regarding wire size and cable length requirements for
the SA and FC buses.
Table 4: Communications Bus and Supply Power Terminal Blocks, Functions, Ratings, Requirements, and
Cables
Terminal
Block/Port Label
FCBUS
or
SABUS
SA/FC BUS
(Port)
2
2
2
Labels
-
COM
SHLD
or
SAPWR
HOT24~
COM
Function, Electrical Ratings/RequirementsTerminal
FC or SA Bus Communications+
Signal Reference (Common) for FC or SA Bus
communications
SHLD on FC Bus: Isolated terminal (optional shield drain
connection
SAP WR on SA Bus: 15 VDC power lead connection
Note: The SA PWR terminal on an IOM controller does
not supply 15 VDC. The SA Bus supervisor (FAC,
FEC, or VMA) supplies 15 VDC to devices on the
SA Bus requiring power.
RJ-12 6-Position Modular Connector provides:
FC or SA Bus Communications
FC or SA Bus Signal Reference and 15 VDC Common
Commissioning Converter or ZFR 1811 Wireless Router
(Maximum total current draw for SA Bus is 240 mA.)
24 VAC Power Supply - Hot
Supplies 20-30 VAC (Nominal 24 VAC)
24 VAC Power Supply - Common
(Isolated from all other Common terminals on controller.)
Recommended Cable Type
FC Bus: 0.6 mm (22 AWG)
stranded, 3-wire twisted, shielded
cable recommended.
SA Bus: 0.6 mm (22 AWG)
stranded, 4-wire (2 twisted-pairs),
shielded cable recommended.
Note: On the SA Bus, the + and -
wire are one twisted pair,
and the COM and SA PWR
are the second twisted pair
of wires.
Wireless Commissioning Converter
retractable cable or 24 AWG 3-pair
CAT 3 Cable <30.5 m (100 ft)
0.8 mm to 1.5 mm
(18 AWG) 2-wire
2
1
1
See Table 3 to determine wire size and cable lengths for cables.
2 The SA Bus and FC Bus wiring recommendations in this table are for MS/TP bus communications at 38,400 baud. For more
information, refer to the MS/TP Communications Bus Technical Bulletin (LIT-12011034).
8IOM3731-0A Input/Output Module Installation Instructions
Setup and Adjustments
Setting the Device Addresses
Metasys field controllers are master devices on MS/TP
(SA or FC) buses. Before operating field controllers on
a bus, you must set a valid and unique device address
for each controller on the bus. You set a field controller's
device address by setting the positions of the switches
on the DIP switch block at the top of the controller (Figure
3). Device addresses 4 through 127 are the valid
addresses for these controllers.
The DIP switch block has eight switches numbered 128,
64, 32, 16, 8, 4, 2, and 1. Switches 64 through 1 are
device address switches. Switch 128 is a mode switch
that enables a field controller to operate on a ZFR1800
Series Wireless Field Bus. Switch 128 must be set to off
for all hard-wired SA and FC Bus applications. Set switch
128 to ON for wireless FC bus applications only.
Figure 9: Device Address DIP Switch Block Set to
Address 21
3. Set switch 128 to ON only for controllers on a
ZFR1800 Series Wireless Field Bus application. For
all hard-wired SA and FC bus applications, ensure
that switch 128 is set to off.
Note: Do not connect a field controller with switch
128 set to ON to an active (hard-wired) SA or
FC bus. When a controller with switch 128 set
to ON and a device address from 4 to 127 is
connected to a wired field bus, the entire field
bus is rendered inoperable until the controller
is disconnected or switch 128 is set to off.
Refer to the ZFR1800 Series Wireless Field Bus
System Technical Bulletin (LIT-12011295) for more
information on device addresses in wireless
applications.
4. Set a unique and sequential device address for each
of the field controllers connected on the SA or FC bus
starting with device address 4.
To ensure the best bus performance, set sequential
device addresses with no gaps in the device address
range (4, 5, 6, 7, 8, 9, and so on). The field controllers
do not need to be physically connected on the bus
in their numerical device address order.
5. Write each field controller's device address on the
white label below the DIP switch block on the
controller's cover.
Note: Metasys field controllers ship with switch 128 ON
and the remaining address switches off rendering
the controllers wired slave devices, which do not
operate on MS/TP buses, but will not interfere
with bus operation. Set a valid and unique device
address on the field controller before applying
power to the controller on the bus.
To set the device addresses on Metasys field controllers:
1. Set all of the switches on the address DIP switch
block (128 through 1) to off.
2. Set one or more of the seven address switches (64
though 1) to ON, so that the sum of the switch
numbers set to ON equals the intended device
address. See Table 5 for valid device addresses.
Set the highest number switch that is less than or
equal to the intended device address to ON. Then
continue setting lower numbered switches until the
total equals the intended address. For example, if the
intended device address is 21, set switch 16 to ON
first, then set switch 4 ON, followed by switch 1
(16+4+1= 21).
Refer to the MS/TP Communications Bus Technical
Bulletin (LIT-12011034) for more information on field
controller device addresses and how to set them on
MS/TP buses.
Table 5: SA/FC Bus Device Address Descriptions
Use on DescriptionDevice
Address
0
(Switch
128 Off)
1 to 3
(Switch
128 Off)
4 to 127
(Switch
128 Off)
Reserved for FC Bus Supervisory Controller
(not for use on field controllers).
Reserved for peripheral devices (not for use
on field controllers).
Used for MS/TP master devices (field
controllers) that are hardwired to an SA bus
or FC bus.
9IOM3731-0A Input/Output Module Installation Instructions
Table 5: SA/FC Bus Device Address Descriptions
Use on DescriptionDevice
Address
0 to 3
(Switch
128 ON)
4 to 127
(Switch
128 ON)
Reserved addresses for wired slave devices
(not for use on field controllers).
Note: Metasys field controllers ship with
switch 128 ON and the remaining
address switches off rendering the
controllers wired slave devices, which
do not operate on MS/TP buses.
Valid for MS/TP Master field controllers on
wireless FC Buses only.
Note: Do not connect a field controller with
switch 128 ON to an active
(hard-wired) SA or FC bus. When a
controller with switch 128 ON and a
device address from 4 to 127 is
connected to a wired field bus, the
entire field bus is rendered inoperable
until the controller is disconnected or
switch 128 is set to Off.
Removing the Controller Cover
Important: Electrostatic discharge can damage
controller components. Use proper
electrostatic discharge precautions during
installation, setup, and servicing to avoid
damaging the controller.
Important: Disconnect all power sources to the
controller before removing cover and
changing the position of any jumper or the
EOL switch on the controller. Failure to
disconnect power before changing a jumper
or EOL switch position can result in damage
to the controller and void any warranties.
The controller cover is held in place by four plastic latches
that extend from the base and snap into slots on the
inside of the housing cover.
To remove the controller cover:
1. Place your fingernails under the two cover lift tabs
(Figure 3) on the sides of the housing cover and
gently pry the top of the cover away from the base to
release the cover from the two upper latches.
2. Pivot the top of the cover further to release it from the
lower two latches.
3. Replace the cover by placing it squarely over the
base, and then gently and evenly push the cover on
to the latches until they snap into the latched position.
Setting the End-of-Line (EOL) Switch
Each field controller has an EOL switch, which, when set
to ON, sets the field controller as a terminating device on
the bus. See Figure 3 for the EOL switch location. The
default EOL switch position is Off.
Figure 10: End-of-Line Switch Positions
To set the EOL switch on a field controller:
1. Determine the physical location of the field controller
on the SA or FC bus.
2. Determine if the field controller must be set as a
terminating device on the bus.
Note: The EOL termination rules for SA buses and
FC buses are different. Refer to the MS/TP
Communications Bus Technical Bulletin
(LIT-12011034) for detailed information
regarding EOL termination rules and EOL
switch settings on SA and FC buses.
3. If the field controller is a terminating device on the FC
bus, set the EOL switch to ON. If the field controller
is not a terminating device on the bus, set the EOL
switch to Off.
When a field controller is connected to power with its
EOL switch set to ON, the amber EOL LED on the
controller cover is lit.
Commissioning Field Controllers
You commission BACnet® MS/TP field controllers with
the Controller Configuration Tool (CCT) software, either
via a Bluetooth® Wireless Commissioning Converter, a
ZigBee™wireless dongle, or in passthrough mode when
connected to an NAE or NCE. Refer to Controller Tool
Help (LIT-12011147) for detailed information on
commissioning field controllers.
Troubleshooting Field Controllers
Observe the Status LEDs on the front of the field
controller and see Table 6 to troubleshoot the controller.
To troubleshoot an integral or local controller display,
refer to the DIS1710 Local Controller Display Technical
Bulletin (LIT-12011270).
10IOM3731-0A Input/Output Module Installation Instructions
Table 6: Status LEDs and Descriptions of LED States
LED ColorLED Label
Description of LED StatesNormal LED
State
On SteadyGreenPOWER
Off SteadyRedFAULT
Blink - 2 HzGreenSA/FC BUS
AmberEOL
Off (Except on
terminating
devices)
Off Steady = No Supply Power or the controller’s polyswitch/resettable fuse
is open. Check Output wiring for short circuits and cycle power to controller.
On Steady = Power Connected
Off Steady = No Faults
On Steady = Device Fault; no application loaded; Main Code download
required, if controller is in Boot mode, or a firmware mismatch exists between
the FEC and the ZFR1811 Wireless Field Bus Router.
Blink - 2 Hz = Download or Startup in progress, not ready for normal operation
Blink - 2 Hz = Data Transmission (normal communication)
Off Steady = No Data Transmission (N/A - auto baud not supported)
On Steady = Communication lost, waiting to join communication ring
On Steady = EOL switch in ON position
Off Steady = EOL switch in Off position
Repair Information
If a field controller fails to operate within its specifications,
replace the controller. For a replacement field controller,
contact your Johnson Controls® representative.
Table 7: Accessories Ordering Information
DescriptionProduct Code
Number
Wireless Commissioning Converter, with Bluetooth® TechnologyMS-BTCVT-1
Wireless Field Bus Router for wireless Field Controller applicationsMS-ZFR1811-0
Transformer, 120 VAC Primary to 24 VAC secondary, 20 VA, Wall PlugTP-2420
Y65T31-0
ZFR-USBHA-0
Transformer, 120/208/240 VAC Primary to 24 VAC Secondary, 40 VA, Foot Mount, 8 in. Primary Leads
and Secondary Screw Terminals, Class 2
Note: Additional Y6x-x Series transformers are also available. Refer to the Series Y63, Y64, Y65,
Y66, and Y69 Transformers Product Bulletin (LIT-125755) for more information.
Power transformer (Class 2, 24 VAC, 50 VA maximum output), no enclosureAS-XFR050-0
Replacement SA Bus Terminal Blocks, 4-Position, Brown, Bulk PackAP-TBK4SA-0
Replacement FC Bus Terminal Blocks, 4-Position, Blue, Bulk PackAP-TBK4FC-0
Replacement Power Terminal Blocks, 3-Position, Gray, Bulk PackAP-TBK3PW-0
Universal Serial Bus (USB) Dongle with ZigBee
Note: The ZFR-USBHA-0 replaces the IA OEM DAUBI_2400 ZigBee USB dongle that was previously
available through our Insight Communications distributer. The ZFR-USBHA-0 can be ordered
through Advanced Order Management System (AOMS). For additional information on the
ZFR-USBHA-0 ZigBee dongle, refer to the ZFR1800 Series Wireless Field Bus System
Technical Bulletin (LIT-12011295) or ZFR1800 Series Wireless Field Bus System Quick
Reference Guide (LIT-12011630).
Accessories
See Table 7 for field controller accessories ordering
information.
11IOM3731-0A Input/Output Module Installation Instructions
Technical Specifications
Table 8: IOM3731-0A Technical Specifications
MS-IOM3731-0A Input/Output ModuleProduct Code Numbers
Supply Voltage
Ambient Conditions
Addressing
Communications Bus
Input and Output Capabilities
Terminations
Mounting
Housing
Dimensions(Height x Width x Depth)
Compliance
24 VAC (nominal, 20 VAC minimum/30 VAC maximum), 50/60 Hz, power supply
Class 2 (North America), Safety Extra-Low Voltage (SELV) (Europe)
14 VA maximum for IOM3731-0A onlyPower Consumption
Operating: 0 to 50°C (32 to 122°F); 10 to 90% RH noncondensing
Storage: -40 to 80°C (-40 to 176°F); 5 to 95% RH noncondensing
DIP switch set; valid field controller device addresses 4–127 (Device addresses 0–3
and 128–255 are reserved and not valid IOM addresses.)
BACnet® MS/TP, RS-485:
3-wire FC bus between the supervisory controller and field controllers
4-wire SA bus between field controller, network sensors and other sensor/actuator
devices, includes a lead to source 15 VDC supply power (from field controller) to
bus devices.
H8SX/166xR Renesas® 32-bit microcontrollerProcessor
640 KB Flash Memory and 128 KB Random Access Memory (RAM)Memory
8 - Binary Inputs: Defined as Dry Contact Maintained or Pulse Counter/Accumulator
Mode
8 - Binary Outputs: Defined as 24 VAC Triac (external source power only)
Input/Output: Fixed Screw Terminal Blocks
SA/FC Bus and Supply Power: 4-Wire and 3-Wire Pluggable Screw Terminal
Blocks
SA/FC Bus Port: RJ-12 6-Pin Modular Jacks
Horizontal on single 35 mm DIN rail mount (preferred), or screw mount on flat surface
with three integral mounting clips on controller
Enclosure material: ABS and polycarbonate UL94 5VB; Self-extinguishing, Plenum
Rated
Protection Class: IP20 (IEC529)
150 x 164 x 53 mm (5-7/8 x 6-1/2 x 2-1/8 in.) including terminals and mounting clips
Note: Mounting space requires an additional 50 mm (2 in.) space on top, bottom
and front face of controller for easy cover removal, ventilation and wire
terminations.
0.5 kg (1.1 lb)Weight
United States: UL Listed, File E107041, CCN PAZX, UL 916, Energy Management
Equipment
FCC Compliant to CFR47, Part 15, Subpart B, Class A
Canada: UL Listed, File E107041, CCN PAZX7 CAN/CSA C22.2 No.205, Signal
Equipment
Industry Canada Compliant, ICES-003
Europe: Johnson Controls, Inc., declares that this product is in compliance with the
essential requirements and other relevant provisions of the EMC Directive
2004/108/EC.
Australia and New Zealand: C-Tick Mark, Australia/NZ Emissions Compliant
BACnet International: BACnet Testing LaboratoriesTM(BTL) 135-2004 Listed
BACnet Application Specific Controller (B-ASC)
12IOM3731-0A Input/Output Module Installation Instructions
The performance specifications are nominal and conform to acceptable industry standard. For application at conditions
beyond these specifications, consult the local Johnson Controls® office. Johnson Controls, Inc. shall not be liable
for damages resulting from misapplication or misuse of its products.
Building Efficiency
507 E. Michigan Street, Milwaukee, WI 53202
Metasys® and Johnson Controls® are registered trademarks of Johnson Controls, Inc.
All other marks herein are the marks of their respective owners. © 2013 Johnson Controls, Inc.
www.johnsoncontrols.comPublished in U.S.A.
13IOM3731-0A Input/Output Module Installation Instructions
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