Omega Products CN8541-MA-DC1 User Manual

Universal Temperature/Process
Controllers 1⁄8 and 1⁄4 DIN Sizes

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All models shown smaller
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CN8541TC-R1, $314.

CN8500 Series

Starts at

$

314

 NEMA 4X (IP65)

Front Panel Standard

 Universal Power Supply
 User-Selectable

Ramp to Setpoint

 Smooth Auto/Manual

Operation

 Optional RS232 or

RS485 Communications

 Autotuning Heat or Cool

 Thermocouple, RTD,

Voltage, or Current Input

 Plug-In Outputs Modules

(Field Installable)

 Dual Outputs and Alarms
 Optional Heater Break

Alarm, Remote Setpoint,
Transducer Power Supply,
and Recorder Output

The CN8500 Series temperature
controller is versatile and
user-friendly. The operator needs to
review only those parameters
relevant to the particular application.
A dual digital display offers optimal
process information at a glance.
The dedicated upper display shows
the process temperature, while the
lower display displays setpoint and
setup parameters. Individual LEDs

CN8561TC-R1, $404.

CN8551TC-R1, $317.

identify the status outputs, alarms,
digital communications, and special
options. The CN8500 Series
features a NEMA 4X front panel and
a universal power supply that
accepts 103 to 253 Vac and
103 to 330 Vdc.

Control algorithms available are P,
PI, PD, PID, and on/off. The
autotune feature automatically sets
proportional band, rate, and reset
before the process reaches
setpoint. These parameters provide
quick stabilization of both the
heating and cooling process without
overshoot, hunting, or cycling. The
standard dual control outputs can
be configured in a variety of control
and alarm applications such as
heat, heat/cool, heat/alarm, cool, or
cool/alarm. The ramp-to-setpoint
feature allows the user to define the
rate of rise to reach the setpoint,
thus minimizing thermal shock to
the load during start-up.

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Specifications

erformance

P

Accuracy: ±0.2% FS, ±1 digit
Setpoint Resolution:

1 count/0.1 count

Repeatability: ±1.0 count

emperature Stability: 5 µV/°C max;

T

3 µV/°C typical

Thermocouple Cold-Junction
Tracking: 0.05°C/°C ambient

Common Mode Rejection: >100 dBA
Series Mode Rejection: >70 dBA

rocess Sampling: 10 Hz (100 ms)

P

Inputs

Thermocouple Lead Resistance:

100 Ω max for rated accuracy

Response Time: 0.1, 1.0 or 10 s
Decimal Position: Selectable

Outputs

Output #1: Reverse acting (heating)
Output #2: Direct acting (cooling)
Mechanical Relay:

Rated 5 A @ 120 Vac,
3 A @ 240 Vac

Current: 4 to 20 mA, 500 Ω max
Voltage: 20 Vdc pulse, 1 kΩ min load
Triac: Solid state relay, 120/240 Vac,

zero voltage switched rated 1 A
continuous, 10 A surge @ 25°C (77°F)

Alarms: Optically isolated triac rated
1 A, 120/240 Vac @ 25°C (77°F)

Control Characteristics

etpoint Limits: Limited to configured

S

range for thermocouple and RTD;
limited to scaled range

Alarms: Adjustable for high/low,
process or deviation

Rate: 0 to 900 s
Reset: 0 to 3600 s
Cycle Time: 0.2 to 120 s
Gain: 0 to 400
Gain Ratio:

0 to 2.0 (in 0.1 increments)

On/Off Deadband: 1 to 100 counts
Spread (Output 2):

0 to 100 counts (above setpoint)
Damping: Adjustable (low, normal

or high)

Ramp to Setpoint: 1 to 100 minutes
Autotune: Operator-initiated from

front panel
Manual Control: Operator-initiated

from front panel

General

Power: 115 to 230 Vac ±10%,

50/60 Hz; 115 to 300 Vdc ±10%
(auto-polarity)
Display: Dual LED, 4-digit process

display, green menu/parameter display;

9.2 mm (0.37") high for

1

⁄8 DIN models; 14 mm (0.55") process

display for
Power Consumption: Less than

6 VA (instrument) @ 120 Vac

1

⁄4 DIN units

Input Types and Ranges

Input

Code Type Range Resolution

-18 to 760°C 1°C

Iron-constantan 0 to 1400°F 1°F

-18 to 1349°C 1°C
0 to 2460°F 1°F

CHROMEGA®-ALOMEGA

®

-129 to 316°C 1°C

TC Copper-constantan -200 to 600°F 1°F

-18 to 1299°C 1°C
0 to 2370°F 1°F

OMEGALLOY

®

-18 to 1299°C 1°C

Pt/13% Rh-Pt 0 to 3200°F 1°F

-18 to 1299°C 1°C

Pt/10% Rh-Pt 0 to 3200°F 1°F

-200 to 850°C 1°C

RTD 3-wire, 100 Ω Pt -328 to 1562°F 1°F

-128.8 to 232.2°C 0.1°C

3-wire, 100 Ω Pt -199.0 to 450.0°F 0.1°F

V5 1 to 5 V Scalable (-1999 to 9999) Selectable

0 to 5 V Scalable (-1999 to 9999) Selectable

V10 2 to 10 V Scalable (-1999 to 9999) Selectable

0 to 10 V Scalable (-1999 to 9999) Selectable

MV 10 to 50 mV Scalable (-1999 to 9999) Selectable

0 to 50 mV Scalable (-1999 to 9999) Selectable

MA 4 to 29 mA Scalable (-1999 to 9999) Selectable

0 to 20 mA Scalable (-1999 to 9999) Selectable

For CN8200,
CN8240 and
CN8260 Series
Controllers

 Software Can Support

Up to 254 CN8200,
CN8240 or CN8260
Controllers

Sample of screen displaying status

of multiple controllers.

Sample of screen displaying

controller parameters.

The CN8-SW software is designed
to interface with the CN8200,
CN8240 and CN8260 Series
controllers with optional
communication hardware.
Designed for use on laptops or
PC’s, this development provides
the user with:

• Time saving benefit and
convenience of remotely
configuring and adjusting units.

• Saving and retrieving settings to
and from files.

• Cloning settings to other instruments.

• Highly flexible logging and
“real time” charting capability
for providing hard copy QA
records for ISO-9000 and other
management purposes.

The CN8-SW software is a powerful
process development tool for the
OEM customer or process engineer.
With compatible modems and PC
computers, remote site supervisory
control and data acquisition can
take place to facilitate periodic or
continuous monitoring and
troubleshooting.

Data is stored to file in a tamper
resistant format to ensure the
integrity of reports for quality
monitoring requirements.

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