Johnson Controls C450CBN-1, C450CCN-1 Installation Instructions Manual

Figure 1: System 450 Module Dimensions, mm (in.)

127

(5)

4

Screw

Slots

11

(7/16)

(2-3/8)

75

(2-15/16)

1/2 in. No minal

Trad e Size

Conduit Hole

22

(7/8)

40

(1-9/16)

DIN Rail

Clips

FIG:sys450_dims

System 450™ Series Control Modules with Relay Outputs

Installation Instructions

C450CBN-1
C450CCN-1

Part No. 24-7664-2675, Rev. G

Issued April 27, 2010

Supersedes December 21, 2009

Application

IMPORTANT: Use this System 450 Series Control

Module with Relay Output only as an operating
control. Where failure or malfunction of the System
450 control module could lead to personal injury or
property damage to the controlled equipment or
other property, additional precautions must be
designed into the control system. Incorporate and
maintain other devices, such as supervisory or
alarm systems or safety or limit controls, intended to
warn of or protect against failure or malfunction of
the System 450 control module.

System 450 is a family of modular, digital electronic
controls that is easily assembled and set up to provide
reliable temperature, pressure, and humidity control for
a wide variety of Heating, Air Conditioning, Ventilation,
and Refrigeration (HVACR) and commercial/industrial
process applications.

The System 450 control modules allow you to
configure custom application-specific control systems
with up to three input sensors and ten (relay and/or
analog) outputs, including control systems that can
monitor and control temperature, pressure, and
humidity applications simultaneously.

You can easily install and quickly configure a
stand-alone System 450 control module and sensor in
the field as a replacement control for almost any
temperature, pressure, and humidity control.

C450CxN-1 models are Single-Pole, Double-Throw
(SPDT) relay control modules with Liquid Crystal
Display (LCD) and four-button touch pad User Interface
(UI) that allows you to set up a System 450 control
system. C450CBN-1 models provide one SPDT relay,
C450CCN-1 models provide two SPDT relays.

Refer to the System 450 Series Technical Bulletin
(LIT-12011459) for more detailed information on
designing, installing, setting up, and troubleshooting
System 450 Series control systems. The System 450
technical bulletin can be accessed and downloaded on
the Johnson Controls® Online Product Litera tu re Web
site at the following Web address:

http://cgproducts.johnsoncontrols.com/default.aspx

13

(1/2)

(3/16)

(Four)

61

61

(2-3/8)

Installation

Location Considerations

Observe the following System 450 location guidelines:

• Ensure that the mounting surface can support the
module assembly, mounting hardware, and any
(user-supplied) panel or enclosure.

• Mount the modules upright and plugged together in
a horizontal row where possible (Figure 3). DIN rail
mounting is highly recommended.

• Mount modules on flat even surfaces.

• Allow sufficient space for wires and connections.

• Mount the modules in locations free of corrosive
vapors and observe the ambient operating
conditions in the Technical Specifications

• Do not mount the modules on surfaces that are
prone to vibration or in locations where radio
frequency or electromagnetic emissions may
cause interference.

• Do not install the modules in airtight enclosures.

• Do not install heat-generating devices in an
enclosure with the modules that may cause the
temperature to exceed the ambient operating limit.

.

System 450™ Series Control Modules with Relay Outputs Installation Instructions 1

Mounting

!

Figure 2: C450CxN-1 Wiring Terminals Terminals

C

5V

C

C

are interna lly

connected.

LNC1

LNO1

LC1

Normally Closed/Off

Position

Connector

terminal block labeled

LNC2, LNO2, and LC2.

FIG:sys450_rly_cntrl_wir

Note:

not

relay and do supply any pow er to the applicat i on.

Supply Power and

Control Sensor Terminals

Low Voltage (< 30 V)

Dry-Contact, Line-Voltage

Relay Output Terminals

(See

for Electrical Ratings.)

Technical Spe c i fications

Mount System 450 modules on 35 mm DIN rail
(recommended) or directly to an even wall surface. To
mount modules on DIN rail:

1. Provide a section of 35 mm DIN rail that is longer
than the module assembly width, and mount the
DIN rail horizontally in a suitable location using
appropriate mounting hardware/fasteners.

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

IMPORTANT: Do not exceed the System 450
module electrical ratings. Exceeding module
electrical ratings can result in permanent da mage to
the modules and void any warranty.

2. Clip the control module on the rail, position the
upper DIN rail clips on the top rail, and gently snap
the lower clips onto the rail.

3. Clip the remaining power and/or expansion
modules to the right of the control module on to the
DIN rail and plug the 6-pin module connectors
together (Figure 3).

Note: If your System 450 control system uses a
power module, the power module must be plugged
into the right-hand side of the control module.

To direct-mount modules to wall surfaces:

1. Plug the modules together, remove the module
covers, place the assembly against wall surface
horizontally in a suitable location and mark the
mount hole locations on the surface (Figure 1).

2. Install appropriate screw fasteners, leaving screw
heads approximately one to two turns away from
flush to the surface.

3. Place the assembly over screw heads on the
mounting slots, and carefully tighten the mounting
screws.

Note: If you mount the modules on an uneven
surface, do not damage the housings when
tightening mounting screws. Use shims/washers to
mount module assembly evenly on the surface.

Refer to the control sensor installation instructions for
information on locating and mounting control sensors.

Wiring

See Figure 2 and Table 1 for electrical termination
locations and wiring information. See Technical

Specifications on page 12 for electrical ratings.

IMPORTANT: Do not connect 24 VAC supply
power to the System 450 modules before finishing
wiring and checking all wiring connections. Short
circuits or improperly connected wires can result in
damage to the modules and void any warranty.

IMPORTANT: Run all low-voltage wiring and
cables separate from all high-voltage wiring.
Shielded cable is strongly recommended for input
(sensor) and analog output cables that are exposed
to high electromagnetic or radio frequency noise.

24V

Sn1

Common terminals (C)

6-Pin Module

Some models have a

second output relay and

Internal

SPDT Relay

Sn2

Sn3

WARNING: 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.

System 450™ Series Control Modules with Relay Outputs Installation Instructions2

The relay output terminals connect to an internal SPDT

Figure 3: Example System 450 Heat/Cool System with Condenser Fan Speed Control

L2
L1

L2
L1

0-10 VDC or

4-20 mA

Signal

L1 L2

Sn-1
Sn-2
Sn-3

Active/ P assive Sens or Jumpers

Analog Output

COM

AO2

AO1

Note:

In 120 VAC app li c ations, L1 mu st be the Hot lead

and L2 must be the Neutral/Common lead.

Table 1: System 450 Terminal Wiring Information

Label Terminal Function Wire Sizes

24V Accepts 24 V AC supply power , when a C450YNN power module is not connected,

and provides power terminal for 24 VAC (humidity) sensors.

5V Provides 5 VDC power for active sensors.
Sn-1, Sn-2,

Sn-3

Accepts passive or active (0-5 VDC) input signals from sensors.
Note: You must position the Active/Passive Sensor Jumper (Figure 3 and

Figure 6) correctly for each sensor in your control system before operating the

C

(Three
Terminals)

system. See Setting Active/Passive Sensor Jumpers
Provide low-voltage Common connections for 24 VAC power and passive or active

sensors connected to the 5V, Sn1, Sn2, and Sn3 terminals.
Note: The three C terminals are connected internally and can be connected to

for more information.

ground in the field.

LNC1, LNC2 Connects control circuit to the Normally Close (NC) contact on the SPDT relay.
LNO1, LNO2 Connects control circuit to the Normally Open (NO) contact on the SPDT relay.
LC1, LC2

Connects line (power) to Common (C) on the SPDT

1

relay.

0.08 mm
28 AWG to 16 AWG

0.08 mm
28 AWG to 14 AWG

FIG:sys450_app_exmpl

2

to 1.5 mm

2

to 2.5 mm

2

2

1. See Internal SPDT Relay insert in Figure 2 for more System 450 relay contact and terminal information. See T echnical
Specifications for SPDT relay electrical ratings.

System 450™ Series Control Modules with Relay Outputs Installation Instructions 3

Figure 4: System 450 Control Module Output Relay LEDs, LCD, Four-Button Touch Pad User Interface

Output Number:

value that identifies the Output associated
with the Status or Setup Value shown
on the scr een. Output N umbers are
automa tically determi ned by the ou tp ut s'
physical positions (left to right) in the
module assembl y. (Here, 4 = Output 4.)

Control Ramp Icon:

Displays whether an
Analog Output (only) is set as direct-acting
or reverse acting, a nd w hether the out put
signal st r ength is at minimum or maximum
when the sensed property is at Setpoint.
The Contr o l Ram p i c on displ ay e d i s
determined by the Output's SP , EP, OS P,
and OEP setup values.

Menu Button:

Press to move through the
sensor and output setup start screens.
When moving through the status or setup
screens, press to return to the status start
screen or set up start screen.

M

M

Status or Setup Id entifier:
or

OSP

Displays the

unit of me asurement, output, sensor numbe r,

setup para meter for the di splayed Sta t us or
Setup Value. (Here, the Setup Identifier
represents % Output at Setpoint.)

Up and Down Buttons:

Press or to select
a differ ent value for any flashing value in the
Setup Value field. In the Main/Default (Sensor
Status) sc r een, press and hold both and
for 5 seconds to access the Setup Star t s cr eens.

Status or Setup Value:

or

Displays th e current
input stat us, o utput statu s setup parameter
value for t he displayed input sensor, output
and/or set up parameter. select
a different Parameter Value when the value
is flashing. (Here, 1 00 = 100%.)

Press or to

M

Green LE D s

associ at ed Relay Output is On or Of f .

the (flashing) Setup Value and go to the
next setu p scr een.

100

OSP

4

Figure 5: Active/Passive Sensor Terminal Pin

Block Set up for Example in Figure 3

Sensor 2:

(or removed) sets Sn-1 to Active (Pressure).

Jumper positioned across two

pins sets Sn-2 to Passive (Temperature).

Jumper positioned across two

pins sets Sn-3 to Passive (Temperature).

Sensor 3:

Sn-1
Sn-2

3

Sys450_jmprs

Light-Emitting Diode (LED):

on Relay C ontrol Mod ul e and Relay
Expansion Modules (only) indicates if the

Displays a numerical

FIG:sys450 cntrl_modul

Next Button:

press to scroll through the system status
screens. In a setup screen , pr es s to save

In the Main /Default screens,

Setup and Adjustments

System 450 Component Requirements

A System 450 control system consists of one control
module, one to three control sensor inputs, and one to
ten outputs that provide On/Off control and/or analog
control. Figure 3 shows an example System 450
module assembly with two input sensors and three
outputs (two relay outputs and one analog output).

Setting up a System 450 Module Assembly

To set up a System 450 module assembly:

You can now set up your control system in the
System 450 reset control module UI.

Note: After you power on your module assembly, you
can set up your control system in the control module UI
before wiring the sensors or outputs to your assembly.

Setting Active/Passive Sensor Jumpers

Before putting your System 450 reset control system
into operation, you must set up each sensor in your
system as either passive or active by positioning the
jumper on the terminal pins on the terminal block
located below the sensor terminal block. See Figure 3.

1. Determine the controlled conditions, sensor types,
and value ranges required for your application, and
select the appropriate System 450 sensor types.

Temperature sensors are p assive (2-wire ) sensors and
the corresponding jumpers must be positioned across
both pins. Humidity and pressure transducers are

2. Determine the number and type (relay or analog) of
outputs required to control your application, and
select the appropriate System 450 control module
and expansion modules to provide the outputs.

3. Assemble the control and expansion modules in
the proper order, starting with the control module
on the left.

Note: If you use a C450YNN-1 power module, it
must be plugged into the control module. Plug in
any expansion modules (for your control system) to
the right of the power module.

4. Apply supply power to the module assembly.

System 450™ Series Control Modules with Relay Outputs Installation Instructions4

active (3-wire) sensors and correspond in g ju m p er s
must be positioned on one pin (or removed
completely). Figure 5 shows the jumper positions for
the System 450 example shown in Figure 3.

Sn-

Sensor 1:

Jumper positioned on one pin

Setting up a Control System in User Interface

1

74

2

F

OUT

1

On

64

OUT

3

System 450 control modules have a back-lit LCD and a
four-button touch pad UI (Figure 4) that enable you to
set up your control system. To set up a control system
in the System 450 UI:

1. Build your control system module assembly and
connect it to power. See Setting up a System 450
Module Assembly on page 4.

Note: Ever
ON, the control module polls all of the modules to
identify output type (relay or analog) and assigns a
sequential output number (1 to 9 [0 = 10]) to each
output starting with the control module output on
the left. The output numbers identify each output’s
setup screens in the UI. (See Figure 4.)

2. Access the System 450 setup screens in the UI.
See Accessing the System 450 Setup Screens
page 6.

3. Set up the control system inputs in the UI. See

Setting up System 450 Sensors

y time a module assembly is powered

on

on page 6.

4. Set up the control system outputs in the UI. See

Setting up System 450 Outputs

IMPORTANT: Do not change the module positions
after a System 450 control system is set up in the UI.
System 450 control logic is set up in the UI according
to the Sensor Types, the o utput types, and the o utput
numbers. Changing modules or module positions in a
module assembly that is already set up in the UI, can
change the output numbers, output type s, an d the
setup values of the assembly outputs, which requires
setting up the outputs again.

Use the worksheet provided on page 14 to plan and
record the settings for your System 450 control system.

Viewing the Main and System Status Screens

After you install, wire, power on, and set up your control
system in the UI, the Main screens appear on the LCD.
During normal operation, the Main screens
automatically scroll through the current status of each
sensor in your control system. See Table 2 for more
information about the Main screens.

The System Status screens display the current status
of each input and output in your control system. In the
Main screen, press repeatedly to scroll through and
view all of the status screens in your control system.
See Table 2 for more information about the System
Status screens.

on page 8.

Table 2: System 450 Main Screens and Status Screens Informat ion and Procedures

LCD Screen Name, Description/Function, User Action, and Example

Main (Input Status) Screen: During normal operation, the Main screen automatically scrolls through the

232

PSI

current status at each input sensor in your control system and displays the sensor number, the unit of
measurement, and the sensed condition value. See Figure 7.

Note: Main screens are view-only; selections are not made in Main screens.
Press

in your control system.
Press and hold

Note: In any system setup screen, you can return to the Main Screens by pressing both

simultaneously. Also, the UI returns to the Main screen after 2 minutes of inactivity in any screen.
Screen examples show Sensor 1 sensing 232 psi and Sensor 2 sensing 74°F.

System Status Screens: The System Status screens display current status of all inputs and outputs in
your control system. Relay output status screens display output number and relay status (On/Off). Analog
output status screens display output number, signal strength, and control ramp icon. See Figure 7.

Note: System Status screens are view-only; selections are not made in Status screens.
Press

control system.

Screen examples show Output 1 relay is On and Output 3 signal strength is 64% of the total signal
strength. The control ramp icon in the bottom screen example indicates that the Analog Output is set up
with SP<EP and OSP<OEP. See Setting up an Analog Output (OUTA
icons.

repeatedly to scroll through and view the System Status screens for all inputs and outputs

and for 5 seconds to access your control system’s setup screens.

repeatedly to scroll and view the System Status screens for the inputs and outputs in your

x) for information about control ramp

and

System 450™ Series Control Modules with Relay Outputs Installation Instructions 5