Johnson Controls IOM3723 Manual de usuario

IOM3723 Input/Output Module Installation Guide

Application

The MS-IOM3723 input/output expansion module

is a part of the Metasys system Field Equipment

Controller family. Input/Output expansion modules

(IOMs) expand the number of input/output points

connected to a General Purpose Application

Controller (CGM), VAV Box Controller (CVM), SNC,

SNE, 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 IOM3723 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 Johnson

Controls® and third-party BACnet systems. IOMs

Note: With Release 10.1 of the Controller

Configuration Tool (CCT), VMAs, FECs, and

FACs can be configured to communicate 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 the following guidelines when installing an

expansion module:

• To minimize vibration and shock damage,

transport the expansion module in the original

container.

• Verify that all parts shipped with the expansion

module.

• Do not drop the expansion module or subject it

to physical shock.

Parts included

• One expansion module with removable

terminal blocks (Power and SA/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

• Small straight-blade screwdriver for securing

wires in the terminal blocks

Physical features

The following figure displays the physical features

of an IOM, and the accompanying table provides a

*24101431124E*

Part No. 24-10143-1124 Rev. E

2020-10-30

(barcode for factory use only)

MS-IOM3723

description of the physical features and a reference

to further information where required.

Figure 1: IOM3723 physical features

Table 1: IOM3723 features callout numbers and

descriptions

Callo

ut Physical features: description and references

1Device Address DIP Switch Block (see Setting the device

address)

224 VAC, Class 2 Supply Power Terminal Blocks (see Supply

power terminal block)

3 Cover Lift Tab (see Removing the expansion module cover)

4Sensor Actuator (SA) Bus/Field Controller (FC) Bus

Terminal Block (see SA/FC bus terminal block)

5End-of-Line (EOL) Termination Switch (see Setting the End-

of-Line (EOL) switch)

6Binary Input (BI) Terminal Block (see Input and Output

wiring guidelines)

7 LED Status Indicators (see Table 7)

8 Mounting Clips

Mounting

Observe these guidelines when mounting an IOM

expansion module:

• Ensure the mounting surface can support the

expansion module, DIN rail, and any user-

supplied enclosure.

• Mount the expansion module horizontally on

35 mm (1.4 in.) DIN rail whenever possible.

• Mount the expansion module in the proper

mounting position (Figure 2).

• Mount the expansion module on a hard, even

surface whenever possible in wall-mount

applications.

• Use shims or washers to mount the expansion

module securely and evenly on the mounting

surface.

IOM3723 Input/Output Module Installation Guide2

• Mount the expansion module in an area

free of corrosive vapors and observe the

Ambient Conditions requirements in Technical

specifications.

• Provide for sufficient space around the

expansion module for cable and wire

connections for easy cover removal and good

ventilation through the expansion module (50

mm [2 in.] minimum on the top, bottom, and

front of the expansion module).

• Do not mount the expansion module on

surfaces prone to vibration, such as duct work.

• Do not mount the expansion module in areas

where electromagnetic emissions from other

devices or wiring can interfere with expansion

module communication.

Observe these additional guidelines when mounting

an expansion module in a panel or enclosure:

• Mount the expansion module so that the

enclosure walls do not obstruct cover removal

or ventilation through the expansion module.

• Mount the expansion module so that the power

transformer and other devices do not radiate

excessive heat to the expansion module.

• Do not install the expansion module in an

airtight enclosure.

Figure 2: Mounting positions

Mounting features and dimensions

See the following figure for mounting dimensions

listed in millimeters and inches. Inches are listed

in parenthesis. The following figure also illustrates

the DIN rail channel and the mounting clips in an

extended position.

Figure 3: Back of expansion module

DIN rail mount applications

About this task:

Mounting the expansion module horizontally on 35

mm (1.4 in.) DIN rail is the preferred method.

To mount an expansion module on a 35 mm DIN

rail, complete the following steps:

1. Securely mount a 20 cm (8 in.) or longer

section of 35 mm (1.4 in.) DIN rail, horizontally

and centered in the desired space.

2. Pull the two bottom mounting clips outward

from the expansion module to the extended

position.

3. Hang the expansion module on the DIN rail by

the hooks at the top of the (DIN rail) channel

on the back of the expansion module, and

position the expansion module snugly against

the DIN rail.

4. Push the bottom mounting clips inward (up)

to secure the expansion module on the DIN

rail.

To remove the expansion module from the

DIN rail, pull the bottom mounting clips

out to the extended position and carefully

lift the expansion module off the DIN rail.

Wall mount applications

About this task:

IOM3723 Input/Output Module Installation Guide 3

To mount an expansion module 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 provided dimensions and one of the

mount positions, vertical or horizontal. You

can also hold the expansion module 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 expansion module 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.

Wiring

WARNING

Risk of Electric Shock:

Disconnect or isolate all power supplies before

making electrical connections. More than one

disconnection 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.

AVERTISSEMENT

Risque de décharge électrique:

Débrancher ou isoler toute alimentation avant

de réaliser un branchement électrique. Plusieurs

isolations et débranchements sont peut-être

nécessaires pour -couper entièrement l'alimentation

de l'équipement. Tout contact avec des composants

conducteurs de tensions dangereuses risque

d'entraîner une décharge électrique et de provoquer

des blessures graves, voire mortelles.

CAUTION

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.

CAUTION

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 expansion

module electrical ratings. Exceeding expansion

module electrical ratings can result in

permanent damage to the expansion module

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

expansion module components. Use proper

electrostatic discharge precautions during

installation, setup, and servicing to avoid

damaging the expansion module.

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).

IOM3723 Input/Output Module Installation Guide4

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 terminal blocks

The IOM3723 has inputs only (no outputs). The

inputs are located on both the top and bottom

of the expansion module. See Table 2 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 to 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 expansion modules in a daisy-chain

configuration using 3-wire twisted, shielded cable as

shown in the following figure.

Figure 4: FC bus terminal block wiring

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 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 expansion

module.

Wire the 24 VAC supply power wires from the

transformer to the HOT and COM terminals on the

terminal plug as shown in Figure 6. The middle

terminal on the supply power terminal block is not

used.

IOM3723 Input/Output Module Installation Guide 5

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 expansion module 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 expansion module

does not require an earth ground connection.

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

expansion module input and output terminals, and

references guidelines for determining proper wire

sizes and cable lengths.

In addition to the wiring guidelines in Table 2

• 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., observe these guidelines when wiring

controller inputs and outputs:

• 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.

IOM3723 Input/Output Module Installation Guide6

I/O terminal blocks, ratings, and

requirements

Table 2: IOM3723 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 16 V, 10K ohm pull

INnBinary Input - Pulse Counter/Accumulator Mode

0.01 second minimum pulse width

(50 Hz at 50% duty cycle)

Internal 16 V, 10K ohm pull up

BINARY INPUT

ICOM n

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.

Note: For all Binary ICOMn terminals, BI is isolated from

the FC bus common.

See Guideline A in Table 3.

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.

Table 3: Cable length guidelines

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

0.5 mm (24 AWG) stranded copper 107 m (350 ft) twisted wire

100 mV maximum voltage drop

Depending on the cable and the connected

input 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 the cable and the connected

input 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 cable length versus load

current

Use the following figure to estimate the maximum

cable length relative to the wire size and the load

current (in mA) when wiring inputs.

Note: The following information applies to low-

voltage (<30 V) inputs only.

IOM3723 Input/Output Module Installation Guide 7

Figure 7: Maximum wire length for low-voltage

(<30 V) Inputs by current and wire Size

Communications bus and supply power

wiring guidelines

Table 4 provides information about the functions,

ratings, and requirements for the expansion

module's communication bus and supply power

terminals; it additionally provides guidelines for wire

sizes, cable types, and cable lengths when wiring

the expansion module communication buses and

supply power.

In addition to the guidelines in Table 4, observe the

following 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.

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 Recommended cable type

-FC or SA Bus Communications

COM Signal Reference (Common) for FC or SA Bus

communications

FC Bus

SA Bus SHLD

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 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.

SA/FC BUS

(Port)

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 /ZFR Pro

Wireless Router

(Maximum total current draw for SA Bus is 100

mA.)

Wireless Commissioning Converter

retractable cable or 24 AWG 3-pair CAT 3

Cable <30.5 m (100 ft)

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

IOM3723 Input/Output Module Installation Guide8

Note: See Table 3 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).

Termination details

A set of Johnson Controls termination diagrams

provides details for wiring inputs and outputs to the

controllers. See the following table in this section for

the applicable termination diagram.

Table 5: Termination details

Type of device Type of Input/

Output Termination diagrams

Dry Contact (Binary Input) BI

Setup and Adjustments

Setting the device address

About this task:

Metasys expansion modules are master devices

on MS/TP (SA or FC) buses. Before operating an

expansion module on a bus, you must 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 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 controller to operate on

ZFR/ZFR Pro Series Wireless Field Bus. 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 controllers ship with switch 128

ON and the remaining address switches OFF

rendering the controllers wired subordinate

devices, which do not operate on MS/TP 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.

IOM3723 Input/Output Module Installation Guide 9

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 modules 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 (4, 5, 6, 7, 8, 9, and so on).

The 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.

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

(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.

Removing the expansion module

cover

About this task:

Important: Electrostatic discharge can damage

expansion module components. Use proper

electrostatic discharge precautions during

installation, setup, and servicing to avoid

damaging the expansion module.

Important: Disconnect all power sources to

the expansion module before removing cover

and changing the position of any jumper or the

EOL switch on the expansion module. Failure to

disconnect power before changing a jumper or

EOL switch position can result in damage to the

expansion module and void any warranties.

The expansion module 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 expansion module cover,

complete the following steps:

1. Place your fingernails under the two cover lift

tabs 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 onto the latches until they snap into the

latched position.

Setting the End-of-Line (EOL) switch

About this task:

Each expansion module has an EOL switch, which

when set to ON, sets the expansion module as a

terminating device on the bus. See Figure 1 for the

EOL switch location. The default EOL switch position

is OFF.

Figure 9: End-of-Line switch positions

To set the EOL switch on an expansion module,

complete the following steps:

1. Determine the physical location of the

expansion module on the SA or FC bus.

2. Determine if the expansion module must be

set as a terminating device on the bus.

IOM3723 Input/Output Module Installation Guide10

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