Johnson Controls IOM3733 Manual de usuario
IOM3733 Input/Output Module Installation
Guide
Application
The MS-IOM3733 input/output expansion module
is part of the Metasys® system Field Equipment
Controller family. Input/Output expansion modules
(IOMs) expand the number of input/output points
connected to either a Network Automation Engine
(NAE), Network Control Engine (NCE), Advanced
Application Field Equipment Controller (FAC), Field
Equipment Controller (FEC), or Variable Air Volume
Modular Assembly (VMA) to monitor and control a
wide variety of HVAC equipment.
Note: The IOM3733 model is only available
in certain regions. Contact your local Johnson
Controls representative for more information.
IOM expansion modules operate on an RS-485
BACnet® MS/TP bus and integrate into IOMs
communicate using the BACnet MS/TP protocol
when directly connected to the FC bus.
Note: With Release 10.1 and later of the
Controller Configuration Tool (CCT), VMAs, FECs,
and FACs can be configured to communicate
by using either the BACnet MS/TP or the N2
field bus networking protocol. The operation of
the IOM is not affected by the selection of the
BACnet MS/TP or the N2 protocol in the host
controller, when the IOM is connected to the
host controller using the SA bus.
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 these guidelines when installing a
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 controller with removable terminal blocks
• 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
*24101431140D*
Part No. 24-10143-1140 Rev. D
2019-10-01
(barcode for factory use only)
MS-IOM3733
Physical features
The following figure displays the physical features
of the IOM, and the accompanying table provides a
description of the physical features and a reference
to further information where required.
Figure 1: IOM3733 physical features
Table 1: IOM3733 feature callouts and
descriptions
Callo
ut Physical feature: description and references
1 Binary Output (BO) Terminal Block (see Table 2)
2 Mounting Clip (Three Total) (see Figure 1)
3 Device Address DIP Switch Block (see )
424 VAC, Class 2 Supply Power Terminal Block (see Supply
Power Terminal Block)
5Cover Lift Tab (One of Two) (see Removing the expansion
module cover)
6Sensor Actuator (SA) Bus / Field Controller (FC) Bus
Terminal Block (see SA/FC bus terminal block)
7End-of-Line (EOL) Termination Switch (see Setting the
End-of-Line (EOL) switch)
8 Binary Input (BI) Terminal Block (see Table 2)
9 LED Status Indicators
Mounting
Observe these guidelines when mounting a
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 Technical specifications.
• Provide for sufficient space around the controller
for cable and wire connections for easy cover
removal and good ventilation through the
controller (50 mm [2 in.] minimum on the top,
bottom, and front of the controller).
• Do not mount the controller on surfaces prone to
vibration, such as duct work.
• Do not mount the controller in areas where
electromagnetic emissions from other
devices or wiring can interfere with controller
communication.
IOM3733 Input/Output Module Installation Guide2
Observe these additional guidelines when mounting
a 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 2: Controller mounting positions
Mounting features and dimensions
Figure 3: Back of controller showing extended
mounting clips, DIN rail channel, and mounting
dimensions, mm (in.)
DIN rail mount applications
Mounting the controller horizontal on 35 mm DIN
rail is the preferred mounting method. To mount a
controller on 35 mm DIN rail, complete the following
steps:
1. Securely mount a 20 cm (8 in.) or longer section
of 35 mm DIN rail horizontally and centered in
the desired space so that the controller mounts
in the horizontal position.
2. Pull the two bottom mounting clips outward
from the controller to the extended position.
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 the 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
using the dimensions in Figure 3 and one of the
mount positions shown in Figure 2. 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.
IOM3733 Input/Output Module Installation Guide 3
Wiring
Observe the following guidelines when wiring a
controller:
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 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 1 for terminal block and bus port
locations on the expansion module. Observe the
following guidelines when wiring an expansion
module:
Input and output Terminal Blocks
Most 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 for more information about I/O terminal
functions, requirements, and ratings.
SA/FC bus terminal block
An IOM can be connected to an SA bus or an FC bus,
but not both buses simultaneously. The SA/FC bus
terminal block is a removable, 4-terminal plug that
fits into a board-mounted jack.
When connecting the IOM to an FC bus, wire the
bus terminal block plugs on the expansion module,
and the other controller and expansion modules
in a daisy-chain configuration using 3-wire twisted,
shielded cable as shown in Figure 4.
Figure 4: FC bus terminal block wiring
IOM3733 Input/Output Module Installation Guide4
When connecting the IOM to an SA bus, wire the bus
terminal block plugs on the expansion module and
other SA bus devices in a daisy-chain configuration
using 4-wire twisted, shielded cable as shown in
Figure 5.
Figure 5: SA bus terminal block wiring
Note: The SA PWR/SHLD terminal does not
supply 15 VDC. The SA PWR/SHLD terminal
is isolated and can be used to connect (daisy
chain) the 15 VDC power leads on the SA bus
(Figure 5) or the cable shields on the FC bus
(Figure 4). The SA bus supervisor (FAC, FEC, or
VMA) supplies 15 VDC to devices on the SA bus
requiring power.
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 the following figure:
Figure 6: 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 controller and all other network devices so
that transformer phasing is uniform across the
network devices. Powering network devices
with uniform 24 VAC supply power phasing
reduces noise, interference, and ground loop
problems. The controller does not require an
earth ground connection.
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.
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.
IOM3733 Input/Output Module Installation Guide 5
• 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.
IOM3733 Input/Output Module Installation Guide6
I/O terminal blocks, ratings, and
requirements table
Table 2: IOM3733 terminal blocks, functions, ratings, requirements, and cables
Terminal block label Terminal
label Function, ratings, requirements Determine wire size and
maximum cable length
Binary Input - Dry Contact Maintained Mode
0.01 second minimum pulse width
Internal 16V, 10K ohm pull up
INnBinary Input - Pulse Counter/Accumulator Mode
0.01 second minimum pulse width
(50 Hz at 50% duty cycle)
Internal 16V, 10K ohm pull up
BINARY INPUT
ICOMnBinary Input Common for all Binary Input (IN) terminals
See Guideline A in Table 3.
OUTn
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 OUPUT
(External Power Source
Only)
OCOMnBinary Output Common (for OUTn terminal)
See Guideline C in Table 3.
Cable length guidelines for required wire
sizes
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
Table 3: Cable length guidelines for required wire sizes for low-voltage (<30 V) inputs and outputs
Guideline 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 7 to select wire size/gauge.
Use stranded copper wire
See Figure 7 to determine
cable length. Use twisted
wire cable.
N/A
Maximum wire length by current and
wire size
Use the following figure to estimate the maximum
cable length relative to the wire size and the load
current (in mA) when wiring inputs and outputs.
This figure applies to low-voltage (<30 V) inputs and
outputs only.
IOM3733 Input/Output Module Installation Guide 7
Figure 7: Maximum wire length for low-voltage
Inputs and Outputs by current and wire size
Communication bus and supply power
wiring guidelines
Communications bus and supply power terminal
blocks, ratings, and requirements provides
information about the functions, ratings, and
requirements for the communication bus and
supply power terminals; and guidelines for wire
sizes, cable types, and cable lengths when wiring
the controller's communication buses and 24 VAC
supply power.
In addition, observe these guidelines when wiring
an SA or FC bus and 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 required 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.
Communications bus and supply power terminal blocks, ratings, and requirements
Table 4: Communications bus and supply power terminal blocks, functions, ratings, requirements, and
cables
Terminal block/Port
label Terminal labels Function, electrical ratings/Requirements required cable type
+
-FC or SA Bus Communications
COM Signal Reference (Common) for FC or SA Bus
communications
FC BUS
or
SA BUS SHLD
or
SA PWR
SHLD on FC Bus: Isolated terminal (optional
shield drain connection)
SA PWR on SA Bus: 15 VDC power lead
connection.
Note: The SA PWR terminal on an IOM
expansion module does not supply 15
VDC. The SA bus supervisor supplies 15
VDC to devices on the SA bus requiring
power.
FC Bus: 0.6 mm (22 AWG) stranded, 3-wire
twisted, shielded cable required.
SA Bus: 0.6 mm (22 AWG) stranded, 4-wire
(2 twisted-pairs), shielded cable required.
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.
HOT 24 VAC Power Supply - Hot
Supplies 20–30 VAC (Nominal 24 VAC)
24~
COM 24 VAC Power Supply - Common
0.8 mm to 1.0 mm
(18 AWG) 2-wire
Note: See Maximum wire length by current
and wire size to determine wire size and cable
lengths for cables.
Note: The SA Bus and FC Bus wiring
recommendations in this table are for MS/
TP bus at 38,400 baud. For more information,
refer to the MS/TP Communications Bus Technical
Bulletin (LIT-12011034).
IOM3733 Input/Output Module Installation Guide8
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 5: Termination details
Type of device Type of Input/Output Termination diagrams
Dry Contact (Binary Input) BI
Incremental Control to
Actuator (Switch Low,
Externally Sourced)
BO
24 VAC Binary Output
(Switch Low, Externally
Sourced)
BO
24 VAC Binary Output
(Switch High, Externally
Sourced)
BO
Incremental Control to
Actuator (Switch High,
Externally Sourced)
BO
IOM3733 Input/Output Module Installation Guide 9
Setup and Adjustments
Setting the device address
Metasys expansion modules are master devices
on MS/TP (SA or FC) buses. Before operating an
expansion module on a bus, set a valid and unique
device address for each expansion module on
the bus. You set an expansion module's device
address by setting the positions of the switches on
the DIP switch block at the top of the expansion
module. Device addresses 4 through 127 are the
valid addresses for these expansion modules.
The following table describes the FC bus and SA
bus device addresses for Johnson Controls MS/TP
communications bus applications.
Table 6: SA/FC Bus Device Address Descriptions
Device
Address Use on Descriptions
0
(Switch 128
Off)
Reserved for FC Bus Supervisory
Controller (not for use on
controllers or expansion modules).
1-3
(Switch 128
Off)
Reserved for peripheral devices
(not for use on controllers or
expansion modules).
4-127
(Switch 128
Off)
Used for MSTP master devices
(controllers and expansion
modules) that are hardwired to an
SA bus or FC bus.
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 must be set
to OFF for all hard-wired SA and FC Bus applications.
Figure 8: Device address DIP switch Block set to
address 21
Note: Metasys field controllers ship with switch
128 ON and the remaining address switches
off rendering the controllers wired subordinate
devices, which do not operate on MSTP buses,
but do not interfere with bus operation. Set
a valid and unique device address on the
expansion module before applying power to
the expansion module on the bus.
To set the device addresses on Metasys
expansion modules, complete the following
steps:
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, and ensure that switch 128
remains set to OFF.
Note: To do this, 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 switches 16, 4, and 1 to
ON (16+4+1= 21) and all other switches to OFF.
3. Set a unique and sequential device address for
each of the expansion module connected on
the SA or FC bus, starting with device address 4.
Note: To ensure the best bus performance, set
sequential device addresses with no gaps in the
device address range (for example, 4, 5, 6, 7, 8,
9). The controllers/expansion modules do not
need to be physically connected on the bus in
their numerical device address order.
4. Write each expansion module's device address
on the white label below the DIP switch block
on the expansion module's cover.
Removing the expansion module
cover
Important: Electrostatic discharge can damage
expansion module components. Use proper
electrostatic discharge precautions during
installation, setup, and servicing to avoid
damaging the expansion module.
IOM3733 Input/Output Module Installation Guide10
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