Chromalox CN2110 User Manual

User’s Guide

Chromalox

Load

Alarm

Temp

Set

Point

Set Point

2110

Shop online at

°F

°C

omega.com

®

www.omega.com

e-mail: [e-mail]

®

0037-75429

CN2110

Rev. 8-03

Omega

OMEGAnet®Online Service Internet e-mail

USA: One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford CT 06907-0047

Canada: 976 Bergar

For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

omega.com

®

®

www.omega.com [e-mail]

Servicing North America:

TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Laval (Quebec) H7L 5A1
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

®

Customer Service: 1-800-622-2378 / 1-800-622-BEST
Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN
TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

®

®

Mexico: En Espan˜ol: [phone]-7803 e-mail: [e-mail]

FAX: [phone] [e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Rudé armády 1868, 733 01 Karviná 8

TEL: [phone] FAX: [phone]
Toll Free: 0800-1-66342 e-mail: [e-mail]

France: 11, rue Jacques Cartier, 78280 Guyancourt, France

TEL: [phone] FAX: [phone]
Toll Free in France: 0800-4-06342
e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

TEL: [phone] FAX: [phone]
Toll Free in Germany: 0800 639 7678
e-mail: [e-mail]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

M44 5BD United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

CN 2110

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that
apply. OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts
no liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, patient-connected applications.

CN 2110 Temperature Controller

Table of Contents

Manual Sections

Illustrations

1–Quick Setup ................................................................................................... 1

2–Introduction ................................................................................................... 2

3–Installation and Wiring .................................................................................. 4

4–Adjusting Setpoint and Configuration ......................................................... 12

5–Controller and Alarm Operation .................................................................. 16

6–Replacing Output Modules .......................................................................... 17

7–Calibration ................................................................................................... 19

8–Specifications .............................................................................................. 21

9–Troubleshooting ........................................................................................... 22

10–Omega Warranty and Return ..................................................................... 24

1.1 Dip Switch Settings .................................................................................. 1

1.2 Establishing the Set Point ......................................................................... 1

1.3 Adjusting the Set Point ............................................................................. 1

2.1 Front Panel Identification ......................................................................... 2

2.2 Typical Application .................................................................................. 3

2.3 Model Identification ................................................................................. 3

3.1 Default Dip Switch Settings ..................................................................... 4

3.2 Removing Mounting Collars .................................................................... 5

3.3 Mounting Dimensions .............................................................................. 6

3.4 Mounting the CN 2110 ............................................................................. 6

3.5 Wiring Terminal Identification ................................................................. 7

3.6 Thermocouple Connections with Shield .................................................. 8

3.7 Three-Wire RTD Connections with Shield............................................... 9

3.8 Two-Wire RTD Connections .................................................................... 9

3.9 Control Output Wiring–R1 and TI.......................................................... 10

3.10 Control Output Wiring–R20 ................................................................... 10

3.11 Control Output Wiring–DC .................................................................... 10

3.12 Control Output Wiring–T5 and T10 ....................................................... 11

3.13 90-260 VAC Instrument Power Connections ......................................... 11

3.14 Alarm Connections ................................................................................. 11

4.1 Establishing the Set Point ....................................................................... 12

4.2 Adjusting the Set Point ........................................................................... 12

4.3 Configuring CN 2110 ............................................................................. 13

4.4 Configuring CN 2110 ............................................................................. 13

4.5 Configuring CN 2110 ............................................................................. 13

4.6 Configuring CN 2110 ............................................................................. 13

4.7 Configuring CN 2110 ............................................................................. 13

4.8 Configuring CN 2110 ............................................................................. 13

6.1 Replacing Output Module ...................................................................... 18

iii

CN 2110

Omega

CN 2110

CN 2110 Temperature Controller

Load

Alarm

°F

°C

Temp

Set

Point

Set Point

Chromalox

®

2110

Section 1—Quick Setup

After the controller is properly wired into the system, the user only
needs to verify the sensor input and control type and adjust the set point.

Setting the Sensor and Control Mode

Adjust the dip switches located on the bottom of the unit as shown in
Figure 1.1. The factory settings are J, TC, °F, and PI. It is simpler to
adjust the dip switch prior to mounting the CN 2110.

RTD

ONOF

J

˚C

K
TC
˚F
PI

K

J

TC

RTD

˚F

˚C

PI

ONOF

Figure 1.1
Dip Switch Settings

Adjusting the Set Point

. Apply power to the unit.

1

2. To adjust the set point on the CN 2110 Temperature Controller, press
and hold the Set Point button (see Figure 1.2). The Set Point light is
illuminated.

3. While still pressing the

Set P

oint button, press either the or button
to adjust the set point to the desired value (see Figure 1.3). Holding
the

or button increases the speed of the set point changes.

Chromalox

®

Load

Alarm

Temp

Set

Point

2110

°F

°C

Set Point

Figure 1.2
Establishing the Set Point

Section 1–Quick Setup

The Controller is now operational with factory settings. For more
precise control, set up of the alarm, etc., see Section 4 – Adjusting Set

Point and Configuration.

1

Figure 1.3
Adjusting the Set Point

CN 2110

Omega

Section 2—Introduction

Description

The CN 2110 Temperature controller offers simple setup, flexibility and
control features in an attractive, compact design. The CN 2110 is housed
in a rugged, plastic 1/4 DIN package that only requires four inches
behind the mounting surface. Straightforward operation and easy-to-use
control features are major strengths of the CN 2110 controller.

Easy Three-Step Setup: The CN 2110 delivers exceptional process

temperature control. Your process is up and running after three easy setup
steps: 1) Select the sensor and control type, 2) Hook up the system and

3) Select the desired temperature.

NEMA 4X Front Panel

Construction for
hosedown applications

Output LEDs

Indicates control load
ON and alarm status

Temp and Set Point LEDs

Indicates actual or set point
temperature is displayed

Set Point Button

• In Operation Mode,
adjusts Set Point

• In Configuration Mode
with the
serves as “Menu” button

or button,

Display
(4 Green, 7-Segment LEDs)

Actual process temperature displayed

®

Chromalox

Load

Alarm

Set

Point

Temp

Set Point

2110

°F

°C

Green LEDs

Indicates °F or °C selected
for temperature display

• In Operation Mode,
pushbuttons adjust Set Point.

• In Setup Mode, pushbuttons
increase/decrease MENU
values.

CN 2110

Inspection and

Unpacking

Figure 2.1
Front Panel Identification

Your CN 2110 controller should arrive in good condition. Upon arrival,
inspect the packaging for any visible damage.

Unpack the controller and carefully inspect for product damage that may
have occurred during shipment. If the package or contents have been
damaged in shipping, you must file a claim with the delivery service.
The delivery service will not accept a claim from the shipper.

If not immediately installing the controller, store in a cool, dry environ­ment in its original protective packaging. Temperature extremes and
excessive moisture can damage the instrument.

2

Section 2–Introduction

CN 2110 Temperature Controller

Typical Application

Model Identification

Figure 2.2 shows the CN 2110 in a typical application.

Chromalox

Alarm

Figure 2.2
Typical Application

®

Load

Temp

Set

Point

Set Point

2110

°F

°C

Output

Alarm
Output

Input

Heater

Sensor

Process

Before installation, please identify your controller model number. The
model number appears on a label on the side of the housing.

Section 2–Introduction

3

CN 2110

Omega

Section 3—Installation and Wiring

Sensor and Control

Type Selection

Switches

Set the CN 2110 controller’s configuration via mechanical dip switches,
located on the bottom of the unit. Factory settings are J, TC, °F, and PI
Control. Switches are easier to set before mounting.

To change the switch settings, first disconnect all wiring and power
from the unit. Adjust switch settings as follows:

Setting Factory

Switch Function Options Setting

A Thermocouple J or K J
B Input Type TC or RTD TC
C Temperature Units °F or °C °F
D Control Type ON-OFF or PI PI

If input type is thermocouple, switch A selects either thermocouple type
J or K.

Switch B selects input type thermocouple or RTD (resistance tempera­ture detector). Note: If RTD is selected, switch A is ignored.

Switch C selects temperature units

°F or °C.

Switch D selects either PI (Proportional-Integral) or ON-OFF control.

CN 2110

J

RTD

˚C

ONOF

K
TC
˚F
PI

Figure 3.1
Default Dip Switch Settings

4

K

J

TC

RTD

˚F

˚C

PI

ONOF

Section 3–Installation and Wiring

CN 2110 Temperature Controller

Mounting

Two mounting collars securely hold the CN 2110 controller in the
mounting hole. Remove these mounting collars before installation.

Removing Mounting Collars

1. To remove the rear collar, press the sides of the collar. This releases
holding tabs on the top and bottom of the collar.

2. Slide the collar off the back of the unit.

3. Slide the front collar off the back of the unit

Press In

Front Collar

Rear Collar

Press In

Holding
Tabs

Section 3–Installation and Wiring

Figure 3.2
Removing Mounting Collars

5

continued

CN 2110

Omega

Mounting

continued

Mount the CN 2110

1. Cut out a 1/4 DIN, 3.6-inch (92mm) square hole in the mounting
panel.

2. Insert the unit into the mounting hole as shown in Figure 3.4.

3. Slide the front mounting collar onto the back of the controller.

4. Slide the rear mounting collar onto the back of the controller until the
holding tabs securely engage with the holding tab slots in the control­ler housing (see Figure 3.4).

5. Tighten the four rear collar mounting screws until the unit is held
firmly in the panel.

CAUTION: Do not overtighten.

The controller will now be held firmly in place.

Panel

Cutout

3.6

(92)

®

4.0

(101.6)

Chromalox

Load

Alarm

Set

Point

Temp

(101.6)

4.0

Set Point

2110

°F

°C

Figure 3.3
Mounting Dimensions

0.4

(10)

3.6

(92)

4.0

(102)

0.5

(12.7)

3.55
(90)

3.6

(92)

CN 2110

Figure 3.4
Mounting the 2110

6

Holding
Tabs Slots

Holding
Tabs

Front Collar

Rear Collar

Rear Collar
Mounting
Screw

Section 3–Installation and Wiring

CN 2110 Temperature Controller

Good Wiring

Practices

!

Separate wire into bundles—When planning the system wiring,

separate wiring into functionally similar bundles, e.g.

• Power leads

• Sensor leads (if power leads must cross sensor leads, they should

cross at a 90° angle)

• Output signal lines

Separate sources of electrical noise—Locate all sources of electrical

noise in your system, and separate these sources from the control
system, e.g.

• Motors

• Contacts

• Solenoids
Electrical noise can affect the function of any control system. When

driving a contactor coil or other inductive load, an appropriate rated AC
snubber circuit is recommended (Omega Part No. CNQUENCHARC).

Connect before power is applied—Make all electrical wiring connec-

tions to the back of the controller before power is applied to the unit.

Comply with regulations—WARNING: All wiring practices must
comply with local regulations. Failure to do so could result in damage
to controller and/or personal injury or death from electrical shock.

This instrument is intended for panel mounting and the terminals must
be enclosed within a panel. Use National Electric Code (NEC) Class 1
wiring for all terminals except the sensor terminals.

Section 3–Installation and Wiring

Check wiring decal—Check the wiring decal on the side of the unit to

verify the model number. The wiring decal shows the wiring termina­tions. All wiring will be connected to the terminals on the back of the
instrument case. Specific wiring instructions for different input and
output types are given in this section. See also Figure 3.5.

Additional information—For sensor wiring practices, see “Sensor

Input Wiring”. For additional information on good wiring practice,
request IEEE Standard No. 518-1982 from IEEE, 345 East 47

th

St., New

York, NY 10017 or www.ieee.org.

Sensor Input
Wiring

Output
Wiring
(T5, T10)

Figure 3.5
Wiring Terminal Identification

7

NO

COM

NC

Output Wiring
(R1, R20, DC, or T1)

Alarm Wiring

Instrument
Power Wiring

CN 2110

Omega

Sensor Input Wiring

Sensor Wiring Notes

For safety and best controller performance,

Sensor leads (thermocouple and RTD) should not be run in the same

•

conduit as power wiring.

Twisted pair, shielded wire is recommended for sensor connections.

•

False temperature readings can occur if the sensor wire is exposed

•

to electrical noise.

Ungrounded thermocouples are recommended.

•

Thermocouple extension wire, if required, must be the same type

•

as the thermocouple (i.e. if a Type K thermocouple is used, then Type
K extension wire must be used.)

• Shielded thermocouple wire, if used, must have the shield

grounded at one end only, preferably at the shield ground terminal on
the controller as shown in Figure 3.6.

Three-wire RTDs are recommended for greatest accuracy.

•

Standard shielded copper wire

•

is recommended for RTD extensions.

Thermocouple Inputs

It is important to observe polarity (+,-) when connecting thermocouple
leadwires. ANSI color coding for the thermocouples used with this
instrument are

Thermocouple

Type Material Polarity (+) Polarity (-)

J iron/constantan white red
K chromel/alumel yellow red

Make thermocouple wiring connections to terminals as shown in Figure

3.6.

TC +
TC -

NO

COM

NC

Shield Ground

Figure 3.6
Thermocouple Connections with Shield

CN 2110

8

Section 3–Installation and Wiring

CN 2110 Temperature Controller

Sensor Input Wiring

continued

Three-Wire RTD Inputs

IMPORTANT: When making the three-wire RTD input connection,
make the resistance of all three extension leadwires equal by using the
same gauge and same length of wire for optimum accuracy. A three-wire
RTD will generally have two wires of the same color. Connect the same
colored wires to the RTDL connections. Connect the alternate colored
wire to the RTDH connection.

Make three-wire RTD connections to terminals as shown in Figure 3.7.

RTDH
RTDL

RTDL

NO

COM

NC

Shield Ground

Figure 3.7
Three-Wire RTD Connections with Shield

Two-Wire RTD Inputs

If using a two-wire RTD input, use heavier gauge leadwires to reduce
leadwire resistance. Any leadwire resistance adds directly to sensor
resistance, thus adding error to the process temperature measurement. It
is also necessary to jumper the two RTDL terminals on the instrument to
complete a two-wire hookup.

RTDH
RTDL

RTDL

NO

COM

NC

Figure 3.8
Two-Wire RTD Connections

Section 3–Installation and Wiring

9

CN 2110

Omega

Control Output

Wiring

The following figures show the proper control output wiring for the
various CN 2110 configurations.

R1 (1 Amp Relay) and T1 (1 Amp, Solid State Relay)
Output Wiring

When driving a contactor coil or other inductive load, an appropriately
rated AC snubber circuit is recommended (Omega Part. No.
CNQUENCHARC), as shown in Figure 3.9.

120/240

Neutral

VAC

Fuse

Load

Snubber

Figure 3.9
Control Output Wiring–R1 and T1

NCNOCOM

R20 (20 Amp Relay) Output Wiring

1/4” fast-on tabs are provided with the R20 output.

NO

COM

NCNOCOM

120/240

VAC

Neutral

Fuse

Load

NCNO

COM

Figure 3.10
Control Output Wiring–R20

DC (Solid State Relay Drive, 24Vdc, 40mA) Output Wiring

-

+

120/240VAC

AC Neutral

Fuse

Load

Figure 3.11
Control Output Wiring–DC

SSR
4115

+

-

NCNOCOM

CN 2110

10

Section 3–Installation and Wiring

CN 2110 Temperature Controller

Control Output

Wiring

continued

Instrument Power

Wiring

T5 (Solid State Relay, 5 Amps) and
T10 (Solid State Relay, 10 Amps) Output Wiring

Note: CN 2110 model T10 has a fan. CN 2110 model T5 does not have

a fan.

Fan

NCNOCOM

Fuse

Load

120/240
VAC

Neutral

Figure 3.12
Control Output Wiring–T5 and T10

Make 120 or 240 VAC instrument power connections to terminals as
shown in Figure 3.13.

120/240VAC

Neutral
Ground

NCNOCOM

Alarm Wiring

Section 3–Installation and Wiring

Figure 3.13
90-260 VAC Instrument Power Connections

The Form C Relay Output is connected as shown in Figure 3.14.

Alarm Out

CNO

COM

Figure 3.14
Alarm Connections

11

NC

NCNOCOM

NO

NC

CN 2110

Omega

Load

Alarm

°F

°C

Temp

Set

Point

Set Point

Chromalox

®

2110

Section 4—Adjusting Set Point and Configuration

Adjusting the

Set Point

1. Set selection switches (see Figure 3.1).

2. Apply power to the unit.

3. To adjust the set point on the CN 2110 Temperature Controller, press
and hold the Set Point button (see Figure 4.1). The Set Point light is
illuminated and the set point value is displayed.

4. While still pressing the

Set P

oint button, press either the or button

to adjust the set point to the desired value (see Figure 4.2).

5. Release the

Chromalox

Load

Alarm

Figure 4.1
Establishing the Set Point

Point

Set P

oint button.

®

Temp

Set

2110

°F

°C

Set Point

Figure 4.2
Adjusting the Set Point

CN 2110

Configuration

While the CN 2110 default settings make it a simple setup controller for
most applications, additional programmable menus can be configured
through three front-panel pushbuttons.

To access the user configuration menus,

1. Press and hold the

and buttons. After three seconds the display

will begin to toggle between the current security code and LocH
(LOCK). The Temp and Set Point LEDs will turn on. See Figure 4.3.

2. Press the

or button to adjust the value to the appropriate security
number (see Security Codes and Levels). Only the value is displayed
during adjustment. See Figure 4.4.

3. Press and hold the Set Point ( ) button and press the or
buttons to scroll the configuration menus. The display will show the
name of the menu and then begin to toggle between the name and the
current value. See Figures 4.5 and 4.6.

12

Section 4–Adjusting Set Point and Configuration

CN 2110 Temperature Controller

Configuration

continued

4. Press the or buttons to adjust the value (only the value is dis­played during adjustment). See Figure 4.7. The new value is set when
the

or button is released.

5. Press and hold the Set Point (

) button and press the button to

advance to the next menu. See Figure 4.8. (Holding the Set Point
( ) button and pressing the button moves through menus in the

opposite direction.)

Repeat steps 4 and 5 through the configuration menus.

Figure 4.3

Chromalox

Load

Alarm

Set

Point

Chromalox

Load

Alarm

Set

Point

¤

2110

¡F

Temp

¡C

Set Point

Figure 4.4

¤

2110

¡F

Temp

¡C

Set Point

Chromalox

Load

Alarm

Temp

Set

Point

Chromalox

Load

Alarm

Set

Point

¤

2110

¡F

¡C

Set Point

Adjust lock
to 458

¤

2110

¡F

¡C

Set Point

Temp

¤

Set Point

Continue
until SP is
displayed

2110

¡F

¡C

Continue
through the
configuration
menus

Figure 4.5

Figure 4.7

®

Chromalox

Load

Alarm

Temp

Set

Point

Adjust the
set point
value

Move to
next menu

2110

°F

°C

Set Point

Figure 4.6

Figure 4.8

Chromalox

Load

Alarm

Set

Point

Temp

Exit Configuration

To exit configuration mode, press and hold both the

and buttons for

three seconds to return to the operation mode.

Note: If no buttons are pressed for three minutes while in user configu-

ration mode, then the controller will exit user configuration and return to
the operation mode.

Section 4–Adjusting Set Point and Configuration

13

CN 2110

Omega

Security Codes and

Levels

Configuration

Menus

To limit access to the user configuration interface, security codes are
assigned to different menu levels. Make security codes available to
operators, maintenance crew, supervisors, etc. according to what func­tion level you want for each group. Security Level C is not recom-
mended for most users. Gain access to configuration menus using the
following codes.

Security Level Security Code Function

A All Values Allows adjustment of

the Set Point
B 458 Basic menus
C 736 Calibration menus

The following configuration menus can be accessed through the user
interface (see Configuration, page 12).

Menu Adjustable Factory Security
Code Function Range Default Level

Security Lock

Process Variable Display

Displays the actual process
temperature.

0-999 458

Read Only

N/A

°F or °C

A

A

Process Set Point Adjust

Adjusts the target process
temperature.

Proportional Band

Temperature range above/below
set point where proportional
control is active. Most
applications require a band
between 10 to 200°F. This menu
is active only when the dip switch
is set to “PI”

Automatic Reset

Control feature that
automatically corrects for small
temperature offsets that occur in
proportional control. The higher
the setting, the faster the
correction occurs. A high setting
could cause overshoot during
start-up. A low setting will not
allow process temperature to
reach to set point quickly
enough. A setting of “0” turns off
automatic reset. This menu is
active only when the dip switch
is set to “PI”.

Sensor Range
°F or °C

1 to Sensor
Span Maximum
°F or °C

0.0 to 100.0
Repeats/Min.

0°F

25

0.1

A

B

B

CN 2110

14

Section 4–Adjusting Set Point and Configuration

CN 2110 Temperature Controller

Configuration

Menus

continued

Menu Adjustable Factory Security
Code Function Range Default Level

Cycle Time

The time for the output to
complete ON to OFF to ON
cycle. Used only with
proportional control. A fast
cycle time provides better
control, but can cause
premature wear to contactor or
other power switching devices.
Magnetic contactors should not
be switched at less than a 30
second cycle time. This menu is
active when the dip switch is
set to “PI”.

On/Off Dead Band

The range above/below set point
in which no control action takes
place. Determines at what
temperature the output switches
ON and OFF. For a 5°F dead
band, 2.5°F is above and below
the set point. This menu is active
when the dip switch is set to
“ONOF”.

Alarm Type

Select high or low alarm.

.1 to 60.0 Sec. Output R1,

R20 = 30
sec.

T1, T5, T10
DC = 1 sec.

1 to 100 °F or °C5 Foc

Off, Hi or Lo OFF

B

B

B

Alarm Set Point

Temperature level that will
actuate the alarm.

Alarm Dead Band

Difference of temperature from
alarm set point before an active
alarm resets.

Set Point Lower Limit

Lower limit to which set point
may be set without security
code access.

Set Point Upper Limit

Upper limit to which set point
may be set without security
code access. This prevents an
operator from setting the set
point temperature to a level
which would damage
equipment or process.

Output Limit

Limits the percentage of output
that can be applied in
proportional control.

Sensor Range

Span High

°F or °C

0 to 100 °F or °C5

Sensor Range

Span Low

°F or °C

Sensor Range

Span High

°F or °C

0 to 100% 100

B

B

B

B

B

For calibration menus (CoFF, dFLt, & CALS), see Section 7–Calibration

Section 4–Adjusting Set Point and Configuration

15

CN 2110

Omega

Section 5—Control and Alarm Operation

Control Operation

The CN 2110 is shipped from the factory with PI (proportional/integral)
control. Proportional control actually determines the percent of heat
needed to control the process. The factory setting for the Proportional
Band is 25°F and the Automatic Reset (Integral) is set at 0.1 repeats/
minute. These settings will control many processes without any changes
to the controller.
Band and Automatic Reset can be changed in the menu configuration.

Tuning PI Control

Adjust Proportional Band

ment is to find the proportional band setting at which the process tempera­ture stabilizes and does not oscillate. If the temperature display is oscillat­ing, increase the Proportional Band (doubling the value) until the tempera­ture display has stopped oscillating. To establish a quick response to control
upsets, adjust for the smallest band that provides stable control (does not
oscillate). Note: The temperature at this point may not be at set point, but
will be stable.

Adjust Automatic Reset (Integral) The Automatic Reset (Integral)

automatically removes the offset between process temperature and set
point. If the process is too sluggish in approaching set point, double the
automatic reset. Too much automatic reset will make a process unstable.

Cycle Time

to the heater. For example, if the cycle time is 1 second and the CN 2110
needs a 75% output, the output will be on for 3/4 of a second and off 1/4
of a second. Units with relay control outputs (R1 or R20) are shipped with
a 30-second cycle time. Units with solid state relays or solid state relay
drives (T1, T5, T10, or DC) are shipped with a 1-second cycle time.

If the process is unstable or too sluggish, the Proportional

The objective of the proportional band adjust-

Cycle time setting determines how often to switch the output

Alarm Operation

(optional)

CN 2110

An alarm relay output is optional on the CN 2110. An alarm can help
protect the process when a too high or too low temperature occurs.

High Alarm:

process temperature is equal to or greater than the alarm set point. For
example, if the high alarm set point is 500°F, the alarm will always actuate
when the process temperature reaches 500°F.

Low Alarm:

is equal to or less than the alarm set point. The low alarm features a power­up inhibit to prevent undesirable alarms during process start up. After the
unit reaches control set point, the low alarm will respond.

Alarm Dead Band:

perature crosses out of the alarm dead band. For example, if the high alarm
is set to 500°F and the alarm dead band is 5°F, the alarm condition will not
reset until the process temperature reaches 495°F.

To enable the alarm relay, select either high or low alarm type and set the
alarm set point. An alarm condition is indicated when the Alarm light to
the left of the display illuminates. Alarm type, set point, and dead band are
selectable through the user configuration interface.

This alarm is a high absolute alarm that actuates when the

The low absolute alarm actuates when the process temperature

The alarm relay de-energizes (resets) when the tem-

16

Section 5–Control and Alarm Operation

CN 2110 Temperature Controller

Section 6—Replacing Output Modules

The CN 2110 Temperature Controller was shipped with the output
modules installed as ordered. The 10A Solid State Relay and 20A
Mechanical Relay output cards control small cartridge heater or strip
heater loads directly, eliminating the need for a remote contactor or solid
state relay. If a larger load is required, the CN 2110 can be configured
with a 1A Pilot Duty Relay or Solid State Relay Drive.

The CN 2110 may be optionally configured with a 5A/120V Alarm
Relay. Alternate modules, configured with or without alarm, can be
installed as needs change.

Control and alarm outputs can be changed in the field.

Module Option

Descriptions

Output Module options are as follows

Factory

Load/Sourcing Default Part No Part No.

Description Specification Cycle Time w/o Alarm w/ Alarm

R1 Relay

R20 Relay

DC SSR Drive

T1 TRIAC

T5 Solid State
Power
Controller

T10 Solid State
Power
Controller

Form A contact, SPST,
N.O. 1.0 Amp at 120/240
VAC resistive load

Form A contact, SPST,
N.O. 20 Amp at 240 VAC,
28 VDC resistive load

24 VDC nominal at 40
mA

1 amp continuous, 10
Amp in-rush 120/240 VAC

120/240 VAC, 5 Amp @
40°C ambient

120/240 VAC, 10 Amp @
40°C ambient with built-
in cooling fan mounted
on rear of housing

30 sec.

30 sec.

1 sec.

1 sec.

1 sec.

1 sec.

2110X-R1

2110X-R20

2110X-DC

2110X-T1

2110X-T5

2110X-T10
(Fan Kit)

2110X-R1-AL

2110X-R20-AL

2110X-DC-AL

2110X-T1-AL

2110X-T5-AL

2110X-T10-AL
(Fan Kit)

Module Installation

!

Section 6–Replacing Output Modules

WARNING: Remove power from the controller before changing
the output module. Failure to do so could cause damage to
controller and/or personal injury or death from electrical shock.

When handling output modules, be careful to guard the module against
static discharge. Follow the steps below to remove an existing output
module and replace it with a new module.

Removal

1. Remove power from the controller.

2. Remove all terminal connections.

17

continued

CN 2110

Omega

Module Installation

continued

!

3. Remove the back cover by lifting four housing clips on the controller.
This releases the back cover. Then pull cover straight off the controller.

4. Gently pry around the sides to loosen and remove the module. Pull
module straight out to avoid bending pin connections.

WARNING: Do not remove module by the handling components
on the module board. This could damage the module.

When removing an T10 output module (SSR with fan), a cable
connects the fan to the far right center of the T10 board. Gently
disconnect the cable from the connector on the output board. Do not

remove the fan from the back cover. This is a single assembly.

For the T10 output module, reconnect the fan cable to the connector
on the far right center of the module. Tuck the cable around the
heatsink.

Replacement

1. Line up pins on the controller with pin connections on either side of
the module and push the new module into place.

2. Reinstall the back cover.

Controller

Pin

Module

CN 2110

Housing Clip

Back Cover

Figure 6.1
Replacing Output Module

Auto Cycle Time

The Control Output Modules have a default cycle time of 1 second (fast
switching) or 30 seconds (slow switching) (See table on page 17). After
replacing a control output, the CN 2110 verifies at power up if a slow or
fast cycle time output has been installed. If an output with a different
default cycle time is installed, the CN 2110 will change the cycle time to
the new device’s default. If the user has changed the cycle time in configu­ration, the CN 2110 retains this value unless an output with a different
default cycle time has been installed.

18

Section 6–Replacing Output Modules

CN 2110 Temperature Controller

Section 7—Calibration

Calibration Offset

Factory Default

Recovery

Calibration offset offsets the displayed value. Usually, this option is
used to match displays of two different instruments that are measuring
the same temperature, but are displaying different temperatures due to
different thermocouple accuracy or placement of the thermocouples.
Caution is advised when adding an offset to the display, since the actual
sensed temperature will not be displayed.

Calibration offset (coFF) is available in the configuration mode, but
only displays if the security lock (LocH) is set to 736.

This option allow you to return the controller’s configuration parameters
back to the factory default values (except for the LocH menu). This
parameter could be used when moving a unit from one application to
another to give the operator an easy place to begin setup of the unit.

Factory Default Recovery is performed in the Configuration Mode,
menu dFLt. The security lock (LocH) must be set to 736 to perform a
factory default recovery.

To reestablish the factory default values:

1. Disconnect load power.

2. In the Configuration Mode, set security level (LocH) to 736.

3. Go to menu dFLt and press
reset the values. When the display cycles from rEdy to donE, the
recovery is complete.

. The controller will automatically

Section 7–Calibration

Calibration

The CN 2110 Temperature Controller is factory calibrated before
shipment. Recalibration is not needed when you receive and install the
product. Periodic calibration checks or adjustments should not be
necessary under normal operating conditions. Omega recommends you
recalibrate the controller if all instruments in your facility are periodi­cally calibrated to a known standard.

The CN 2110 always retains the original factory calibration values for
the J, K, and RTD inputs. In an application, only one of these sensor
inputs will be used. The CN 2110 only can retain manual calibration for
a single sensor.

continued

19

CN 2110

Omega

Calibration

continued

Calibration Notes:

When calibrating the CN 2110

1. You must have a sensor simulator to calibrate the CN 2110 controller.
Substitute a precision sensor simulator (Thermocouple simulator or
resistance simulator box) for sensor inputs.

2. Disconnect load power to prevent damage to the process or load.

3. Calibrate RTD inputs using copper (Cu) wire. Calibrate thermo­couple inputs using thermocouple extension wire of the same type as
the thermocouple you are calibrating.

4. Allow the controller to warm up with the appropriate sensor simula­tor connected for at least one hour prior to calibration.

5

. To access the calibration menu, you need level C (736) security.

Sensor Calibration:

1. Set the CN 2110 selection switch to RTD or TC. If TC is selected,
then set the selection switch to J or K.

2. Connect the sensor simulator to the sensor input terminals.

3. Set the simulator to the low value of the sensor selected J TC
(-100°F), K TC (-100°F), RTD (-200°F or 48.46Ω).

4. Go to the CALS parameter on the CN 2110. The display will toggle
between CALS and inLo.

5. Wait 30 seconds for the electronics to fully stabilize. Press
will appear in the display while the controller calibrates the low end
of span.

6. When the controller prompts inHi in the display, adjust the sensor
simulator to the high end of the selected sensor span.
J TC (1400°F), K TC (2400°F), RTD (1000°F or 293.49Ω).

7. Wait 30 seconds for the electronics to fully stabilize. Press
will appear in the display while the controller calibrates the high end
of span. When finished, the controller will display donE.

8. Calibration is complete.

. Dashes

. Dashes

Factory Calibration

Recovery

CN 2110

This procedure allows you to return the controller to its factory calibra­tion settings in the event it is severely out of calibration due to poor
technique or unauthorized calibration.

1. Disconnect load power.

2. Cycle the sensor selection switch twice from its original position (TC
or RTD) to the opposite position (RTD or TC) and back to its original
position. This brings back the factory calibration and deletes the
manual calibration settings.

20

Section 7–Calibration

CN 2110 Temperature Controller

Section 8—Specifications

Control Modes..................................... ON/OFF; PI—Proportional with integral

Control Adjustments

Proportional Band.......................... 1 to sensor span maximum

Automatic Reset ............................ 0.0 to 100.0 repeats/minute

Cycle Time .................................... 0.1 to 60.0 seconds

On/Off Deadband .......................... 1° to 100°F or °C

Set Point Upper Limit.................... sensor range °F or °C

Set Point Lower Limit ................... sensor range °F or °C

Output Limit .................................. 0 to 100%

Alarm Adjustments

Type ............................................... Absolute High or Low

Set Point ........................................ Sensor range °F or °C

Alarm Dead Band .......................... 0° to 100°F or °C

Control/Alarm Outputs

Relay (R1) ..................................... 1 Amp Form A, 120/240VAC

Relay (R20) ................................... Form A, 120/240VAC resistive loads at 30 sec. cycle time

Solid State Relay Drive (DC) ........ 24VDC at 40mA

Solid State Relay (T1) ................... 1A Triac, up to 240VAC

Solid State Relay (T5) ................... 5A, up to 240VAC at 40°C

Solid State Relay (T10) ................. 10A, up to 240VAC at 40°C

Alarm ............................................. Form C, Relay 5 Amps at 120VAC,

Sensor Input ........................................ Switch selectable; J,K Thermocouple; RTD

Input Update Rate .............................. Four samples per second

Input Specifications ........................... Range °F Range °C Accuracy at 77°F ambient

J TC ...............................................

K TC ..............................................

100Ω Pt RTD (a=.00385) ..............

Readout Stability

J and K TC ..................................... +/-1°F per 10°F change in ambient temperature

RTD ............................................... +/-0.5°F per 10°F change in ambient temperature

Open Sensor and

Out-of-Range Conditions.................. Displays “SEnS”, Control output 0%

Instrument Power ............................... 90 to 260VAC Less than 10 VA

Operating Environment...................... 0° to 65°C (32° to 150°F)

Dimensions

Overall ........................................... 4.0 x 4.0 x 4.0 inches (102 mm)

Depth Behind Display ................... 3.6 inches (92 mm)

Front Panel Projection ................... 0.4 inches (10 mm)

Panel Cutout .................................. 3.6 x 3.6 inches (92 mm x 92 mm)

Enclosure Material ............................. High temp ABS plastic rated for 0° to 175°F

Front Panel NEMA 4X construction, requires surface finish not rougher

Influence of Line Voltage Variation

Noise Rejection

Common Mode Noise ................... Less than 2°F with 240 VAC, 60 Hz applied from sensor

Series Mode Noise ......................... Less than 2°F with 100mV, peak to peak series mode noise

RFI ................................................. Typically less than 0.5% of sensor span at distance

Sensor Leadwire Effect

J Thermocouple ............................. +1°F for 1000 feet of 18 AWG

K Thermocouple ............................ +2°F for 1000 feet of 18 AWG

RTD

20 Amps, 500,000 Operations
15 Amps, 1 Million Operations
10 Amps, 5 Million Operations
5 Amps, 5 Million Operations

2.5A at 240VAC

-100 to 1400°F -73 to 760°C 0.2% Span +/-1 least significant digit

-100 to 2400°F -73 to 1316°C 0.2% Span +/-1 least significant digit

-200 to 1000°F -128 to 538°C 0.2% Span +/-1 least significant digit

than 0.000032 inch

.... +/-0.1% of sensor span per 10% change in

nominal line voltage

input to earth ground

of 1 meter (3.1 feet) from a transmitter of 4W at 464MHz

+/-0.1% of sensor span per 20Ω balanced leadwire resistance
(20Ω is the total loop resistance)

thermocouple extension wire
thermocouple extension wire

Section 8–Specifications

21

CN 2110

Omega

Section 9—Troubleshooting

The following Troubleshooting Guide offers simple solutions to com­mon problems and explains the CN 2110’s Error Messages. Review this
section for a possible solution to your problem before contacting
Omega.

Note: For each symptom, perform correction steps in the order listed.

Symptom Probable Cause Correction Steps

Power applied, display
does not light, and
controller does not
function

Display alternates
between HI and
SENS, CN 2110
disables control
output

Process does not
heat up

1. No power applied

2. External fuse open

1. Open sensor

2. Out of calibration

1. No power being
applied to the load

2. Load fuse open

1. Check power wiring
and fusing

2. Power down and
repower up

1. Check sensor wiring

2. Check selection
switches

3. To verify that controller
is at fault, remove the
thermocouple and place
a jumper across the
sensor terminals of the
CN 2110. If the display
reads approximately
ambient, then the
sensor is open. Replace
the thermocouple.

4. See Section 7–Calibra-

tion

1. Verify Load LED is ON

2. Verify the heater or fuse
is not open

3. Verify output limit is set
to 100%

4. Verify set point is
greater than process
temperature

5. Verify output wiring

CN 2110

Erratic operation

22

1. Intermittent sensor
connections

2. Controller failure
(internal electronics)

3. External electrical
noise

1. Check sensor wiring or
substitute sensor
simulator

2. Power down and
repower up

3. Contact Omega

Section 9–Troubleshooting

CN 2110 Temperature Controller

Troubleshooting

continued

Symptom Probable Cause Correction Steps

Process not
in control

Instrument continu­ally goes through
power-up reset

Display reads
FAn FAIL, CN
2110 disables
control output

1. Incorrect settings

2. Thermocouple
Wiring

1. Severe electrical
noise

1. Fan for T10 output
has failed

1. Check Proportional
Band setting and
Automatic Reset
setting

2. Check thermocouple
polarity

1. Separate sensor wiring
from other wiring

2. Apply power line filter

3. Contact Omega

1. Check for and clear any
obstruction in fan, then
power unit up and
check display

2. Discontinue operation,
replace fan assembly,
or return to Omega for
replacement

Section 9–Troubleshooting

23

CN 2110

Omega

CN 2110

CN 2110 Temperature Controller

CN 2110

WARRANTY/DISCLAIMER

USA

MADE

IN

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components which wear are not warranted, including but not
limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any
damages that result from the use of its products in accordance with information provided by
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be
as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE,
AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/ DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.

FOR W
following information available BEFORE
contacting OMEGA:

1. Purchase Order number under which the product

2. Model and serial number of the product under

3. Repair instructions and/or specific problems

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2002 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.

ARRANTY RETURNS, please have the

was PURCHASED,

warranty, and

relative to the product.

FOR NON-WARRANTY REPAIRS,

consult OMEGA
for current repair charges. Have the following
information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the COST

of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems

relative to the product.

Omega

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at www.omega.com

TEMPERATURE

䡺⻬

Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies

䡺⻬

Wire: Thermocouple, RTD & Thermistor

䡺⻬

Calibrators & Ice Point References

䡺⻬

Recorders, Controllers & Process Monitors

䡺⻬

Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

䡺⻬

Transducers & Strain Gages

䡺⻬

Load Cells & Pressure Gages

䡺⻬

Displacement Transducers

䡺⻬

Instrumentation & Accessories

FLOW/LEVEL

䡺⻬

Rotameters, Gas Mass Flowmeters & Flow Computers

䡺⻬

Air Velocity Indicators

䡺⻬

Turbine/Paddlewheel Systems

䡺⻬

Totalizers & Batch Controllers

pH/CONDUCTIVITY

䡺⻬

pH Electrodes, Testers & Accessories

䡺⻬

Benchtop/Laboratory Meters

䡺⻬

Controllers, Calibrators, Simulators & Pumps

䡺⻬

Industrial pH & Conductivity Equipment

DATA ACQUISITION

䡺⻬

Data Acquisition & Engineering Software

䡺⻬

Communications-Based Acquisition Systems

䡺⻬

Plug-in Cards for Apple, IBM & Compatibles

䡺⻬

Datalogging Systems

䡺⻬

Recorders, Printers & Plotters

HEATERS

䡺⻬

Heating Cable

䡺⻬

Cartridge & Strip Heaters

䡺⻬

Immersion & Band Heaters

䡺⻬

Flexible Heaters

䡺⻬

Laboratory Heaters

ENVIRONMENTAL
MONITORING AND CONTROL

䡺⻬

Metering & Control Instrumentation

䡺⻬

Refractometers

䡺⻬

Pumps & Tubing

䡺⻬

Air, Soil & Water Monitors

䡺⻬

Industrial Water & Wastewater Treatment

䡺⻬

pH, Conductivity & Dissolved Oxygen Instruments

CN 2110

0037-75429 M-3776/0202