Johnson Controls M4-CGM Series, M4-CGM09090 Installation Manual

M4-CGM General Purpose Application

Controllers Installation Guide

Part No. 24-10143-01698 Rev. B

2019-10-18

Application

The CGM09090 General Purpose Application MS/
TP Controller (CGM) are equipment controllers
that run pre-engineered and user-programmable
applications, and provides the inputs and outputs
required to monitor and control a wide variety of
HVAC and other facility equipment. CGM controllers
operate on an RS-485 BACnet® MS/TP Bus as
BACnet Advanced Application Controllers (B-AACs)
and integrate into Johnson Controls® and third­party BACnet systems.

CGM equipment controllers include an integral real­time clock, which enables the controllers to monitor
and control schedules, calendars, and trends, and
operate for extended periods of time as stand-alone
controllers when offline from the Metasys® system
network.

Communications Protocols

The CGM controllers can communicate using BACnet
MS/TP, N2, or wireless Zigbee®. By default, the
CGM controllers communicate using the BACnet
MS/TP protocol. The BACnet protocol is a standard
for ANSI, ASHRAE, and the International Standards
Organization (ISO) for building controls.

The CGM controllers can be used as functional
replacements for legacy N2 controllers. The N2­capable MS/TP equipment controller models
provide a cost-effective upgrade and modernization
path for customers with existing N2 controllers.
For installation and commissioning support,
and tips for efficient and safe replacement,
refer to the Modernization Guide for Legacy N2
Controllers (LIT-12012005) and the controller­specific documentation. For information about
mapping N2 Objects in controllers with switchable
communications protocols, refer to the N2

Compatibility Options chapter of the Controller Tool
Help (LIT-12011147).

To configure CGM controllers to communicate using
the N2 communications protocol, see Configuring

N2 communications.

The CGM controller can also be installed in a
wireless application using aZFR/ZFR Pro Wireless
Field Bus Router. To configure these controllers to
communicate using the wireless communications
protocol, see Configuring wireless communications.

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 Interference­Causing Equipment Regulations.

Cet appareil numérique de la Classe (A) respecte
toutes les exigences du Règlement sur le matériel
brouilleur du Canada.

Installation

Observe the following guidelines when installing a
CGM Controller:

• To minimize vibration and shock damage to the
controller, transport the controller in the original
container.

• Verify that all parts shipped with the controller.

• Do not drop the controller or subject it to physical
shock.

*241014301698B*

(For factory use only)

M4-CGM09090

Parts included

• One CGM controller with removable terminal
blocks (Input/Output, Power, FC, and SA 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

CGM09090 physical features

The following figure displays the physical features
of the CGM controllers, and the accompanying table
provides a description of the physical features and a
reference to further information where required.

Table 1: CGM09090 physical features

Physical Feature: Description and References

6 Cover Lift Tab (see Removing the controller cover)

Sensor Actuator (SA) Bus Terminal Block: Orange terminal

7

(see SA bus terminal block)
Field Controller (FC) Bus Terminal Block: Blue terminal

8

(see FC bus terminal block (or N2 protocol as required))
End-of-Line (EOL) Switch (see Setting the End-of-Line

9

(EOL) switch)

Universal Serial Bus (USB) 2.0 host type A Port

10

11

12

13 FC Bus Port RJ-12 6-pin Modular Jack (see FC bus port)
14 LED Status Indicators (see Table 11)

15

Note: The USB feature is not currently supported.

Binary Input (BI) Terminal Block: White terminals; dry
Contact Maintained or Pulse Counter/Accumulator Mode
(see Table 5)

Universal Inputs (UI) Terminal Block: White terminals; can
be defined as Voltage Analog Input (0-10 VDC), Current
Analog Input (4-20 mA), Resistive Analog Inputs (0-600k
ohm), or Dry Contact Binary Input (see Table 5)

Sensor (SA Bus) Port: RJ-12 6-Pin Modular Jack (see SA Bus

port)

Mounting

Figure 1: CGM09090 Physical Features

Table 1: CGM09090 physical features

Physical Feature: Description and References

Binary Outputs (BO) Terminal Block: Black terminals; 24

1

VAC Triac (see Table 5)
Configurable Outputs (CO) Terminal Block: Black

2

terminals; can be defined as Voltage Analog Output (0-10
VDC) or Binary Output (24 VAC Triac) (see Table 5)

Analog Output (AO) Terminal Block: Black terminals;

3

can be defined as Voltage Analog Output (0-10 VDC) or
Current Analog Output (4-20 mA) (see Table 5)

Device Address Rotary Switch Block: Decimal Addressing

4

(see Setting the device address)
Supply Power Terminal Block: Gray terminals; 24 VAC,

5

Class 2 (see Supply power terminal block)

Observe the following guidelines when mounting a
CGM 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 Table 14.

• 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.

M4-CGM General Purpose Application Controllers Installation Guide2

• Do not mount the controller in areas where
electromagnetic emissions from other
devices or wiring can interfere with controller
communication.

On panel or enclosure mount applications, observe
the following additional guidelines :

• 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 position

Figure 3: Back of controller

DIN rail mount applications

To mount a CGM controller horizontally on a 35
mm DIN rail (recommended method), complete the
following steps:

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.

Mounting features and dimensions

See the Figure 3 for mounting dimensions in
millimeters. Figure 3 also illustrates the DIN rail
channel and the mounting clips in an extended
position.

2. Pull the two bottom mounting clips outward
from the controller to the extended position
(Figure 3).

3. Hang the controller on the DIN rail by the hooks
at the top of the (DIN rail) channel on the back
of the controller (Figure 3), and position the
controller snugly against the DIN rail.

4. Push the bottom mounting clips inward (up) to
secure the controller on the DIN rail.

To remove the controller from the DIN rail, pull the
bottom mounting clips out to the extended position
and carefully lift the controller off the DIN rail.

Wall mount applications

To mount a CGM 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 as shown in Figure 3.

M4-CGM General Purpose Application Controllers Installation Guide 3

2. Mark the mounting hole locations on the wall
using the dimensions in 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).

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 for­mant un court-circuit ou connectés de façon incor­recte risquent d'endommager irrémédiablement
l'équipement.

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 over-tighten the mounting
screws. Over-tightening the screws may
damage the mounting clips.

Wiring

Observe the following guidelines when wiring a CGM
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 rac­cordement 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 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.

Important: Use copper conductors only. Make
all wiring in accordance with local, national, and
regional regulations.

Important: Electrostatic discharge can damage
controller components. Use proper electrostatic
discharge precautions during installation,
setup, and servicing to avoid damaging the
controller.

For detailed information about configuring and
wiring an MS/TP Bus, FC bus, and SA bus, refer to
the MS/TP Communications Bus Technical Bulletin
(LIT-12011034). For detailed information about wiring
an N2 network, refer to the N2 Communications Bus
Technical Bulletin (LIT-636018).

Terminal blocks and bus ports

See CGM09090 physical features for terminal block
and bus port locations on the CGM controller.
Observe the following guidelines when wiring a CGM
controller.

Input and Output terminal blocks

On the CGM controller models, the input and
output terminal blocks are removable. 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. For
information about removing a terminal block, see

Removing a terminal block. For more information

about I/O terminal functions, requirements, and
ratings, see Terminal wiring guidelines, functions,

ratings, and requirements.

M4-CGM General Purpose Application Controllers Installation Guide4

FC bus terminal block (or N2 protocol as required)

The FC bus terminal block is a blue, removable, 4­terminal plug that fits into a board-mounted pin
header.

Use a 3-wire twisted, shielded cable, as shown in
Figure 4, to wire the removable FC bus terminal
block plugs on the controller, and other controllers,
in a daisy-chain configuration. For more information
about FC Bus terminal functions, requirements, and
ratings, see Table 7.

Figure 4: FC Bus terminal block wiring

Figure 5: SA Bus Terminal Block Wiring

Table 3: SA bus configuration

Description

1 Wiring for a terminating device on SA bus
2 SA bus terminal block plugs
3 Wiring for a daisy chained device on SA bus

Cable shield connection

4

5 Connects to the next device on the SA bus

Note: Connect the shields to ensure they are
continuous the entire length with only one ground
location.

Table 2: FC bus configuration

Description

1 Wiring for a terminating device on the FC bus
2 FC bus terminal block plugs
3 Wiring for a daisy-chained device on an FC bus segment
4 Connects to the next device on the FC bus
5 Isolated Shield connection terminal

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 an orange, removable,
4-terminal plug that fits into a board-mounted jack.

Use a 4-wire twisted, shielded cable, as shown in
Figure 5, to wire the removable SA Bus terminal
block plugs on the controller, and other SA bus
devices, in a daisy-chain configuration. See

Terminal wiring guidelines, functions, ratings, and
requirements for more information.

Note: The POWER terminal supplies 15 VDC.
The POWER terminal can be used to connect
(daisy chain) the 15 VDC power leads on the SA
bus.

Note: Do not use the modular SA Bus port and
the terminal block SA Bus simultaneously. Only
use one of these connections at a time.

Note: The CGM controller is the EOL for 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 Mobile Access Portal (MAP)
Gateway, or the ZFR/ZFR Pro Wireless Field Bus
Router.

The FC bus port is connected internally to the FC bus
terminal block. See Table 7 for more information.
The FC bus port pin assignment is shown in Figure 6.

M4-CGM General Purpose Application Controllers Installation Guide 5

Note: The MAP Gateway serves as a
replacement for the BTCVT, which is no longer
available for purchase, but continues to be
supported.

Figure 6: Pin number assignments for FC bus and
SA bus ports on equipment controllers

SA Bus port

The Sensor (SA Bus) port on the front of the
controller is an RJ-12, 6-position modular jack that
provides a connection for the MAP Gateway, BTCVT,
the VAV Balancing Tool, the DIS1710 local controller
display, specified network sensors, or other SA
Bus devices with RJ-12 plugs. When the CGM is
configured for N2 network communication, you
must download and commission the controller using
the SA Bus port.

Note: The MAP Gateway serves as a
replacement for the BTCVT, which is no longer
available for purchase, but continues to be
supported.

The Sensor port is connected internally to the SA bus
terminal block. See Table 7 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, 2-pin terminal plug that fits into a board­mounted 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. For more
information about the Supply Power Terminal Block,
see Table 7.

Figure 7: 24 VAC supply power terminal block
wiring

Table 4: Supply power terminal block wiring

Description

1 Supply power terminal block
2 Supply power terminal header

Wires from Johnson Controls 24 VAC, class 2 power

3

transformer
4 24 VAC (Orange wire)
5 COM (Brown wire)

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 equipment 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 equipment
controller does not require an earth ground
connection.

Important: Power wires must be less than 30
meters between controller and transformer

Terminal wiring guidelines, functions, ratings, and requirements

This section provides further guidelines on input and
output wiring, maximum cable length versus load
current, and SA Bus and supply power wiring.

For information about removing a terminal block
from the controller, see Removing a terminal block.

M4-CGM General Purpose Application Controllers Installation Guide6

Input and Output wiring guidelines

• All input and output cables, regardless of wire size
or number of wires, should consist of stranded,

Table 5 provides information and guidelines about
the functions, ratings, and requirements for the
controller input and output terminals, and Table 6
also references guidelines for determining proper

insulated, and twisted copper wires.

• Shielded cable is not required for input or output
cables.

wire sizes and cable lengths.

In addition to the wiring guidelines in Table 5,
observe these guidelines when wiring controller
inputs and outputs:

• Run all low-voltage wiring and cables separate
from high-voltage wiring.

• 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.

I/O terminal blocks, ratings and requirements

Table 5: I/O terminal blocks, functions, ratings, requirements, and cables

Terminal Block label

UNIVERSAL

(Inputs)

Terminal
label

+15 V

INn

ICOMn

Function, ratings, requirements

15 VDC Power Source for active (3-wire) input devices

connected to the Universal INn terminals.
Provides 100 mA total current

Analog Input - Voltage Mode (0–10 VDC)

10 VDC maximum input voltage
Internal 10k ohm Pull-down

Analog Input - Current Mode (4–20 mA)

Internal 100 ohm load impedance

Note: Current loop jumpers are fail-safe to maintain a
closed 4 to 20 mA current loop, even when the power to
the controller is interrupted or off. See UI current loop

jumpers.

Analog Input - Resistive Mode (0–600k ohm)

Internal 12 V. 15k ohm pull up
Qualified Sensors: 0-2k ohm potentiometer, RTD (1k Nickel

[Johnson Controls® sensor], 1k Platinum, and A99B Silicon
Temperature Sensor) Negative Temperature Coefficient (NTC)
Sensor

Binary Input - Dry Contact Maintained Mode

1 second minimum pulse width
Internal 12 V. 15k ohm pull up

Universal Input Common for all Universal Input terminals

Note: All Universal ICOMn terminals share a common,

which is isolated from all other commons.

Determine wire size and
maximum cable length

Same as (Universal) INn

Note: Use 3-wire cable for

devices that source power
from the +15V terminal.

See Guideline A in Table 6

See Guideline B in Table 6.

See Guideline A in Table 6.

See Guideline A in Table 6.

Same as (Universal) INn

M4-CGM General Purpose Application Controllers Installation Guide 7

Table 5: I/O terminal blocks, functions, ratings, requirements, and cables

Terminal Block label

BINARY

(Inputs)

CONFIGURABLE

(Outputs)

ANALOG

(Outputs)

Terminal
label

INn

ICOMn

OUTn

OCOMn

OUTn

OCOMn

Function, ratings, requirements

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.

Analog Output - Voltage Mode (0–10 VDC)

10 VDC maximum output voltage
10 mA maximum output current
Required an external load of 1,000 ohm or more.

Binary Output - 24 VAC Triac (External Power Source only)
Connects OUTn to OCOMn when activated.
External Power Source Requirements:
30 VAC maximum output voltage

0.5 A maximum output current

1.3 A at 25% duty cycle
Maximum 6 cycles/hour with M9220BGx-3
40 mA minimum load current

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.

Binary Output Signal Common All Configurable Outputs
(COs) defined as Binary Outputs are isolated from all other
commons, including other CO commons.

Analog Output - Voltage Mode (0–10 VDC)

10 VDC maximum output voltage
10 mA maximum output current
Required an external load of 1,000 ohm or more.

Note: The Analog Output (AO) operates in the Voltage
Mode when connected to devices with impedances
greater than 1,000 ohm. Devices that drop below 1,000
ohm may not operate as intended for Voltage Mode
applications.

Analog Output - Current Mode (4–20 mA)

Requires and external load between 0 and 300 ohm.

Note: The Analog Output (AO) operates in the Current
Mode when connected to devices with impedances less
than 300 ohm. Devices with impedances greater than
300 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.

Determine wire size and
maximum cable length

See Guideline A in Table 6.

See Guideline A in Table 6.

See Guideline C in Table 6.

Same as (Configurable) OUTn.

See Guideline C in Table 6.

M4-CGM General Purpose Application Controllers Installation Guide8