Omega Products CN8241-DC1 User Manual

1

Extended Warranty

Program

SM

⁄8 DIN Vertical and 1⁄4 DIN
Universal Input Temperature/
Process Controllers

CN8240/CN8260

Starts at

$

339

Standard Features
⻬ Field-Configurable

Universal Temperature
and Process Inputs

⻬ Autotuning, Direct-

or Reverse-Acting
for Both Outputs

⻬ 8 Ramp and 8 Soak

Segments

⻬ User-Selectable

Ramp to Setpoint

⻬ Dual Output/Dual Alarm

Capabilities

⻬ Decimal Display in 0.1°

for Measured
Temperatures
Under 1000°C or °F

⻬ NEMA 4X Front Panel

Optional Features

⻬ Single or Dual Alarms
⻬ RS232 or 485 Digital

Communications

⻬ Remote Analog Setpoint

or Process Output

⻬ Contact/Digital Input
⻬ Transducer Excitation
⻬ PV or SV Retransmission
⻬ Low Voltage Power:

24 Vac/Vdc

OMEGACARESMextended warranty program is

available for models shown on this page. Ask
your sales representative for full details when

placing an order. OMEGACARESMcovers parts,

labor and equivalent loaners.

CN8241-R1, $339, shown
smaller than actual size.

The CN8240/CN8260 1⁄8 DIN vertical
and 1⁄4 DIN temperature/process
controllers are extremely versatile
and user-friendly. The user needs to
review only those parameters
relevant to the particular application
during setup. A dual digital display
offers optimal process information at
a glance. The dedicated upper
display shows the process value,
while the lower display shows setpoint
and setup parameters. Individual
LEDs identify the status of outputs,
alarms, digital communications, and
special options.

The CN8240/CN8260 features a
NEMA 4X front panel and a
universal power supply that accepts
100 to 250 Vac and 120 to 250 Vdc.
A 24 Vac/24 Vdc power supply
option is also available. Calibrations
for most thermocouples and RTDs
are available, as well as for millivolt
linear, volt linear, and current linear
inputs. Unlike the CN8200 1⁄16 DIN
models, these controllers have
plug-in output modules that can be
changed in the field. In addition, a
single-output model can be

P-60

P

a

n

e

l

p

u

n

a

v

a

o

m

p

a

n

CN8261-R1, $401, shown
smaller than actual size.

converted to a dual-output version
in the field.

Available control algorithms are
P, PI, PD, PID, or on/off. The
autotune feature automatically sets
proportional band, derivative, and
integral before the process reaches
setpoint. These parameters provide
quick stabilization of processes with
minimum overshoot, hunting, or
cycling. Eight-level ramp/soak
control is standard, and includes
decimal display on thermocouple
ranges, digital display and signal
filtering, and a percentage of power
limit setting.

The dual control outputs can be
configured for a variety of control
applications, and an additional
2 dedicated alarm outputs are also
available. The CN8240/CN8260
offers a wide range of options,
including RS232 and RS485 digital
communications, a variety of remote
setpoint options, 3 contact/digital
input modes, 4 transducer
excitation voltages, and 4 auxiliary
output ranges.

c

i

l

a

b

l

e

,

v

e

g

a

.

c

o

e

l

p

u

n

c

h

h

e

s

i

s

i

t

m

/

e

s

P

Specifications

erformance

P

Accuracy: ±0.2% FS, ±1 digit

etpoint Resolution:

S

1 count/0.1 count

Repeatability: ±1 count
Temperature Stability:

5µV/°C (maximum)

T/C Cold-Junction Tracking:

0.05°C/°C ambient

ommon-Mode Rejection: 100 dB

C
Series Mode Rejection: >70 dB
Process Sampling: 10 Hz (100 ms)
Inputs
Input Type: See Input Ranges
Digital Input: For remote setpoint,

remote standby or ramp/soak run
and hold

Thermocouple Lead Resistance:

100 Ω max for rated accuracy

Decimal Position: Selectable

Outputs

Output #1: Reverse- or direct-acting,

configured from menu
Output #2: Reverse- or direct-acting,
configured from menu
Mechanical Relay: Rated 5 A @120
Vac, 3 A @ 240 Vac, NO, (output 1);
rated 5 A @ 120 Vac,
3 A @ 240 Vac, NO (output 2)
Current: 4 to 20 mA, 500 Ω max (F1,
F2); 4 to 20 mA, 1000 Ω max
(FH1, FH2)

Voltage: 20 Vdc pulse
Triac: SSR, 120/240 Vac,

zero voltage switched, rated 1 A
continuous, 10 A surge @ 25°C (77°F)
Alarms: Mechanical relay rated 5 A @
120 Vac, 3 A @ 240 Vac, NO

Control Characteristics
Setpoint Limits: Limited to

configured range for thermocouple and
RTD; limited to scaled range
Alarms: Adjustable for Hi/Lo; selectable
process or deviation

Rate (Derivative): 0 to 2400 seconds
Reset (Integral): 0 to 9600 seconds
Cycle Time: 0.2 to 120 seconds
Proportional Band:

1 to span of sensor
Deadband: Negative span to positive
span of sensor

Hysteresis: 1 to span of sensor
Autotune Damping: Adjustable (low,

normal or high)

Ramp to Setpoint: 1 to 9999 minutes
Autotune:

Operator-initiated from front panel

Manual Control:

Operator-initiated from front panel

General

Power: 100 to 250 V, 50/60 Hz

(single-phase); 120 to 250 Vdc,
24 Vac/24 Vdc (optional)
Power Consumption: Less than
6 VA (instrument) @ 120 Vac

Front-Panel Rating: NEMA 4X

1

⁄16 DIN versions are also available.
Refer to the CN8201 and CN8202
Series on page P-45 through P-47.

Input Ranges

Input Type Range

Iron-Constantan -200 to 760°C (-328 to 1400°F)

CHROMEGA®-ALOMEGA

opper-Constantan -270 to 400°C (-454 to 752°F)

C

OMEGALLOY

®

®

-270 to 1354°C (-454 to 2469°F)

-268 to 1300°C (-450 to 2372°F)

Pt/13%Rh - Pt -50 to 1768°C (-58 to 3214°F)

Pt/10%Rh - Pt -50 to 1768°C (-58 to 3214°F)

Pt/30%Rh - Pt/6%Rh 0 to 1820°C (32 to 3308°F)

W/5%Re - W/26%Re 0 to 2315°C (32 to 4199°F)

CHROMEGA®-Constantan -150 to 1000°C (-238 to 1832°F)

NNM (nickel-18% molybdenum, 0 to 1410°C (32 to 2570°F)
vs. nickel -0.8% cobalt)

Platinel II -100 to 1232°C (-148 to 2250°F)

3-wire, 100 Ω PT -200 to 850°C (-328 to 1562°F)

3-wire, 100 Ω PT -199.9 to 375.0°C (-199.9 to 707.0°F)

0 to 1V Scalable (-1999 to 9999) selectable

1 to 5V Scalable (-1999 to 9999) selectable

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

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

10 to 50 mV Scalable (-1999 to 9999) selectable

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

0 to 10 mV Scalable (-1999 to 9999) selectable

0 to 100 mV Scalable (-1999 to 9999) selectable

4 to 20 mA Scalable (-1999 to 9999) selectable

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

Operating Ambient Range:

0 to 55°C (32 to 131°F) @ 90% RH
max, non-condensing

Memory Protection:

Solid state non-volatile memory

Connections: Screw terminals
Contacts: Twin bifurcated

1

⁄8 DIN CN8240 Specifications

Display: Dual LED, 4-digit, 9.2 mm

(0.36"), orange-process display and
green-menu/parameter display

Panel Cutout:

92 x 46 mm (3.60 x 1.8")

Dimensions:

100.33 H x 53.3 W x 18.2 mm D bezel
(3.95 x 2.10 x 0.72")

Depth Behind Panel:

100 mm (3.937")

CN8240 Series Weight:

340 g (12 oz)

1

⁄4 DIN CN8260 Specifications

Display: Dual LED, 4-digit orange

process display, 14 mm (0.55"),
green-menu/parameter display,

9.2 mm (0.36")

Panel Cutout: 92 mm (3.60") square
Dimensions:

100.33 H x 100.33 W x 18.2 mm D bezel
(3.95" x 3.95" x 0.72")

Depth Behind Panel:

100 mm (3.937")

CN8260 Series Weight:

425 g (15 oz)

P-61