Omega Products CN6221-R User Manual

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APPROVED

1

⁄16 DIN Limit Controller

CN6221 Series

Starts at

$

205

⻬ Dual Display
⻬ Universal Input
⻬ High or Low Limit
⻬ Digital Input for

Remote Reset

⻬ RS485 Communications

(Optional)

⻬ Alarms (Optional)
⻬ Retransmission Output

(Optional)

The CN6221 Series is an FM
approved limit controller that can be
configured either as a high limit or
as a low limit controller. The CN6221
features universal input, 2 alarm
outputs, retransmission output, a
timer to count the total time the
setpoint is exceeded, and a register
to retain the maximum. The RS485
communication interface is available
as an option.

Specifications

Power Supply

Voltage: 100 to 240 Vac (±10%),
Frequency: 50 or 60 Hz
Maximum Power Consumption:

8 Va max (4 W max)

Memory: Non-volatile memory
Withstanding Voltage (Between Primary

and Secondary Terminals): 1500 Vac

for 1 min (see Note 1)

Insulation Resistance (Between
Primary and Secondary Terminals):

20 MΩ or more at 500 Vdc (see Note 1)

Note 1: The primary terminals are the power
supply terminals and relay output terminals.
The secondary terminals are the analog input
and output terminals, the voltage pulse
output terminals, and the contact input
terminals.

Contact Input

Function: Resetting “exceeded status”
Input: 1 point

Type: Non-voltage contact

or transistor contact

Contact Capacity: At least 12V/10 mA
On/Off Judgment: On state for 1 kΩ or

less; off state for 20 kΩ or greater

Measured Value (PV)

Input: 1 point

Type: Universal; selectable by software
Accuracy (At 23 ±2°C Ambient

Temperature):
Thermocouple: ±2°C ±1digit

At -200 to -100°C: ±4°C
At -100 to 0°C: ±3°C
Types R and S: ±5°C [±9°C for

0 to 500°C (32 to 932°F)]
Type B: ±9°C (accuracy is not

guaranteed for 0 to 400°C)

RTD: ±1°C ±1digit
Voltage (mV, V): ±0.3% ±1digit

Sampling Period for Measured Value
Input: 500 ms

Burn-Out Detection: Functions for

thermocouple or RTD input (burn-out
upscale only; cannot be switched off)

Input Resistance: 1 MΩ or greater for
thermocouple or DC mV inputs; approx
1 MΩ for DC V input

Maximum Allowable Signal Source
Resistance: 250 Ω for thermocouple or

DC mV input; 2 kΩ for DC V input

Maximum Allowable Wiring
Resistance for RTD Input: 10 Ω/wire

(resistance values of 3 wires must be
the same)

Allowable Input Voltage: ±10 Vdc for
thermocouple or DC mV input; ±20 Vdc
for DC V input

Input Table

Input Type Range (°C) Range (°F)

-270 to 1370 -300 to 2500

-199.9 to 200 -300 to 400

-199.9 to 999.9 -300 to 2100

-199.9 to 400 -300 to 750

-199.9 to 999.9 -300 to 1800

-200 to 1300 -300 to 2400

-199.9 to 900 -300 to 1600

-199.9 to 400 -300 to 750

Platinel 2 0 to 1390 32 to 2500

-199.9 to 850 -199.9 to 999.9

RTD Thermocouple

DC

Voltage

Pt100

JPt100 -199.9 to 500

0 to 100 mV 0 to 100

0 to 5V 0 to 5
1 to 5V 1 to 5

0 to 10V 0 to 10

P-111

-199.9 to 200 -300 to 400

-19.9 to 99.9 -199.9 to 999.9

Panel Punches

Available Visit

omega.com/

panelpunches

CN6221-R, $205,
shown smaller
than actual size.

Noise Rejection Ratio:

Normal Mode Noise: Minimum

40 dB (50/60 Hz)
Common Mode Noise: Minimum
120 dB (90 dB for DC V input)

Reference Juction Error
Compensation: ±1.5°C (at 15 to 35°C),

±2.0°C (at 0 to 50°C)

Note: The reference junction compensation
cannot be switched off

Applicable Standards: RTD,
Thermocouple, JIS/IEC/DIN (ITS90)

0 to 600 32 to 999.9
0 to 400 32 to 750

0 to 1700 32 to 3100
0 to 1700 32 to 3100
0 to 1800 32 to 3200

0 to 400 32 to 750

Control Output

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Output: 1 point

Type: Relay contact

Contact Capacity: 3 A @ 240 Vac or

3 A @ 30 Vdc (with resistance load)

Note: The control output relay cannot be
replaced by users.

Alarm Functions (Optional)

Alarm Types: 22 types (waiting action

can be set by software): PV high-limit,
PV low-limit, deviation high-limit,
deviation low-limit, de-energized on
deviation highdlimit, deenergized on
deviation low-limit, deviation high- and
low-limits, high- and low-limits within
deviation, de-energized on PV high-limit,
de-energized on PV low-limit, fault
diagnosis output, fail output

Alarm Output: 2 relay contacts
Relay Contact Capacity: 1 A @ 240 Vac

or 1 A @ 30 Vdc (with resistance load)

Note: The alarm output relays cannot be
replaced by users.

Retransmission Output
(Optional)

The retransmission output is provided
only when the “/RET” option is specified.

Output Signal: Measured value in
4 to 20 mAdc

Maximum Load Resistance: 600 Ω
Output Accuracy: ±0.3% of span

(at 23 ±2°C ambient temperature)

Communication Interface

Applicable Standards: Complies with

EIA RS485

Number of Controllers: Up to 31
Maximum Communication Distance:

1200 m (3937')
Communication Method: 2-wire

half-duplex, start-stop synchronization,
non-procedural

Construction, Mounting, and
Wiring Construction:

and drip-proof front panel conforming to
IP65; for side-by-side close installation,
controller loses its dust-proof and drip­proof protection

Casing: ABS resin and polycarbonate
Case Color: Black
Mounting: Flush panel mounting

Environmental Conditions

Normal Operating Conditions

Warm-Up Time: At least 30 minutes
Ambient Temperature: 0 to 50°C

(0 to 40°C when mounted side-by-side)

Rate of Change of Temperature:

10°C/h or less
Ambient Humidity: 20 to 90% RH

(no condensation allowed)

Magnetic Field: 400 A/m or less
Continuous Vibrations of 5 to 14 Hz:

Amplitude of 1.2 mm or less

Continuous Vibrations of 14 to 150 Hz:

4.9 m/s

2

(0.5 G) or less

Dust-proof

Short-Period Vibrations: 14.7 m/s
(1.5 G) for 15 seconds or less

Shock: 98 m/s
Mounting Angle: Upward incline of

up to 30 degrees; no downward incline

Altitude: ≤2000 m above sea level
Maximum Effects from Operating
Conditions

Temperature Effects

Thermocouple, mVdc and Vdc
Inputs: ±2 µV/°C or ±0.02% of

FS/°C, whichever is the larger

Resistance Temperature
Detector: ±0.05°C/°C

Analog Output: ±0.05% of FS/°C

Effect from Fluctuation of Power

Supply Voltage (Within Rated

Voltage Range)

Analog Input: ±0.2 µV/V or ±0.002%

of FS/V, whichever is larger
Analog Output: ±0.05% of FS/V

2

(10 G) for 11 ms or less

2

Transportation and Storage
Conditions

Temperature: -25 to 70°C (-13 to 158°F)
Humidity: 5 to 95% RH

(no condensation allowed)
Shock: Package drop height 90 cm (35")

(when packed in the dedicated package)

Dimensions: mm (in)

AVAILABLE FOR FAST DELIVERY!

To Order (Specify Model Number)

Model No. Price Description
CN6221-R $205 Limit controller, single relay output

Options

Ordering Suffix Add’l Price Description

-AL $20 Dual alarms

-PV 40 4 to 20 mA retransmission output

-C4* 95 RS485 communications

-DI * 20 Digital input switching

Only one option can be ordered.

*

Accessories (Field Installable)

Model No. Price Description
CNQUENCHARC $8 Noise suppression kit, 110 to 230 Vac
DPP-4 475

Comes complete with operator’s manual.
Ordering Example: CN6221-R-C4, single output limit controller, mechanical relay, RS485

communications, $205 + 95 = $300.

Recommended Reference Book: Grounding and Shielding Techniques,

EE-1319, $95, See Section Y For Additional Books

P-112

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16 DIN panel punch

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