Omega Products CN3101 User Manual

1

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PPROVED

⁄4 DIN High-/Low-Limit Controller

CN3101

$

510

⻬ 1 High-/Low-Limit

Control Output

⻬ 1 Independent Alarm
⻬ Universal Sensor Inputs
⻬ Transmitter

Power Supply

⻬ Switching Power Supply

100 to 240 Vac

Optional

⻬ RS232, RS422/RS485

Digital Communications
with Second Alarm

⻬ Analog Output

The CN3101 are compact, fully
programmable high- or low-limit
controllers that is UL listed. With
user programmable inputs, outputs
and high-/low-limit features, it is
adaptable to almost any limit control
application, and can be reconfigured
easily as needed. Sophisticated limit
control features include a total time
over/under setpoint display and
peak (maximum or minimum) process
variable display. These valuable
CN3101 features allow you to
determine if process damage has
occurred, and they can help in
analyzing the cause if shutdown
occurs.

The CN3200-SOFT communications
package allows the CN3101
controllers to be programmed,
configured and have their operations
monitored remotely using a
computer. Multiple controllers may
be connected, or “multi-dropped,”
on the same communications line
by using the RS485 standard for
multi-point communications, or by
using an RS232C through modems.
The CN3251 Series controllers with
16 interval ramp/soak and fuzzy
logic are also available in this section.

Specifications

Limit Output:

Automatic: Normally-energized

latching relay; relay de-energizes at
limit setpoint; Form “C” contacts,
5 A @120/230 Vac

Limit Control Adjustments:

High/Low Limit Setpoint:

Sensor range

Setpoint Limits: Sensor range
Deadband: -17 to 38°C (1 to 100°F)
Display Offset: -73 to 38°C

(-100 to 100°F)

Alarm Adjustments:

Setpoints: High and low settings for

each alarm output
Alarm Types: Absolute—high, low

and high/low
Tracking: +Deviation, -deviation,

and ±deviation

Relay Action: Latching or non-latching,
energized or de-energized

Alarm Deadband: Adjustable,

-17 to 38°C (1 to 100°F)
Alarm Inhibit: On power-up,

enabled or disabled

Alarm Outputs:

Relay: Form “C” contacts, 5.0 A

at 120/230 Vac (resistive load)

Sensor Input: Field selectable
Thermocouple, RTD, current or voltage

Input Update Rate: 2 samples
per second

Readout Stability

J, K, E Thermocouple: ±1°F/10°F

change in ambient temperature
T Thermocouple: ±2°F/10°F change

in ambient temperature for sensor
temperature >-80°C (-112°F); ±5°F/10°F
change in ambient temperature
for sensor temperature <-80°C (-112°F)

R, S, B Thermocouple: ±2°F/10°F
change in ambient temperature

RTD: ±5°F/10°F change in ambient
temperature

4 to 20 mA, 1 to 5 Vdc: ±2°F/10°F
change in ambient temperature

Digital Input: Accepts dry-contact closure
Transmitter Power: 24 Vdc

±20% @ 50 mA maximum

Analog Output (Optional):
Retransmit Function: Process variable
Output Signal: 4 to 20 mA into

0 to 800 Ω load, 1 to 5 Vdc into 100 KΩ,
selectable via DIP switch

Range: Programmable over selected
sensor span for retransmission of

Process Variables

Accuracy: ±0.2% of programmed

span, ±1 LSD

Digital Communications (Optional):

RS232: Single-drop, isolated
RS422/485: Multi-drop, isolated,

field-selectable by switch

Baud Rates: 1200, 2400, 4800,
9600, 19.2 K

Protocols: ASCII line

Computer Interface

Instrument Power:100 to 240 Vac,

+10%, -15%; 50 to 60 Hz; 15 VA 12 to
24 Vac/Vdc, ±20%,15 VA (optional)

Operating Environment:0 to 65°C
(32 to 150°F) ambient temperature,
relative humidity less than 95%,
non-condensing

Dimensions:

Overall: 96 L x 96 W x 121 mm D

(3.78 x 3.78 x 4.75")

Depth Behind Panel: 102 mm (4")
Case Material: High-impact, black

ABS plastic

Influence of Line Voltage

Variation: ±0.1% of sensor span/10%

change in nominal line voltage

Noise Rejection:
Common Mode Noise: 140 dB at 60 Hz
Series Mode Noise: ±0.1% of sensor

span with 300 mV peak to peak, 50 or
60 Hz series mode noise

RFI: Typically <0.5% of sensor span at
a distance of 1 m (3.1') from transmitter
(4 W, 464 MHz)

CN3101, $510.

P-105

nput Types and Ranges

Extended Warranty

P

rogram

SM

I

Accuracy @ 25°C/77°F Ambient

Input Type Range (All ±% of Sensor Span)

Iron– -100 to 1400°F 0.2%
Constantan -73 to 650°C

HROMEGA

C

LOMEGA

A

®

–

®

-300 to 2400°F 0.2%
184 to 1316°C

-

Copper– -350 to 750°F 0.2% for PV > -112°F/-80°C
Constantan -212 to 399°C 0.4% for PV < -112°F/-80°C

CHROMEGA®– -100 to 1100°F 0.2%
Constantan -73 to 593°C

Pt-13%Rh/Pt

Pt-10%Rh/Pt

0 to 3200°F 0.4%

-18 to 1760°C

0 to 3200°F 0.4%

-18 to 1760°C

Pt-30%Rh/ 50 to 3300°F 0.4% for PV > 1000°F
Pt-6%Rh 10 to 1816°C 538°C

-200 to 1000°F

Pt, 385 -128 to 538°C
100 Ω -99.9 to 899.9°F

0.2%

-73.3 to 482.2°C

Current 4 to 20 mA Scalable (-500 to 5000) 0.2%

Voltage

0 to 5 Vdc Scalable (-500 to 5000) 0.2%
1 to 5 Vdc Scalable (-500 to 5000) 0.2%

OMEGACARESMextended
warranty program is available for
models shown on this page. Ask

your sales representative for full

details when placing an order.
OMEGACARE

labor and equivalent loaners.

Companion Controller:
CN3251 series ramp and
soak, fuzzy logic controller,
see page P-71.

SM

covers parts,

KTSS-316G-12, molded
transition joint thermocouple
probe, $19. See page A-78.

AVAILABLE FOR FAST DELIVERY!

To Order (Specify Model Number)

Model No. Price Description
CN3101 $510 High-/low-limit controller with single output mechanical relay and 1 alarm

Output, Communications and Low Voltage Power Options

Ordering Suffix Price Description

-PV $80 Recorder output, 4 to 20 mA/1 to 5 Vdc

†

-S2

†

-S4

†

Only 1 communications option can be purchased per unit.

Accessories

Model No. Price Description
3250X-S2 $105 RS232 digital communications board
3250X-S4 105 RS485/422 digital communications board
CN3200-SOFT-WIN2 400 Software for communications options, Windows version
3250X-CASE-COMM** 100 Housing for CN3251 and CN3101 with digital communications
3250X-CASE 90 Housing for CN3251 and CN3101 without digital communications
3250X-SBKT 40 Side mounting bracket for CN3251 and CN3101 models
CNQUENCHARC 8 Noise suppression RC snubber (2 leads), 110 to 230 Vac

Comes complete with operator’s manual.

Ordering Examples: CN3101, single output limit controller, 1⁄4 DIN bezel, programmable input, one alarm, $510.
OCW-2, OMEGACARESMextends standard 3-year warranty to a total of 5 years ($91), $510 + 91 = $601.
CN3101-PV-S4, single output limit controller, 1⁄4 DIN bezel, programmable input, 2 alarms, recorder output, and RS485 communications,

$510 + 80 + 105 = $695.
OCW-2, OMEGACARESMextends standard 3-year warranty to a total of 5 years ($125), $695 + 125 = $820.

Note: In order to add communications to a CN3101, the housing must be replaced with the 3250X-CASE-COMM so that either the 3250X-S2 or

3250X-S4 communications board can be installed.

105 RS232 digital communications with second alarm relay
105 RS422/485 digital communications with second alarm relay

P

Recommended Reference Book: Systems and Control,PE-1412, $135.

See Section Y For Additional Books

P-106

One Omega Drive | Stamford, CT 06907 | 1-888-TC-OMEGA (1-888-826-6342) | [e-mail]

EPG05

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