Omega Products CN700 User Manual

Bulletin E-90-CN700

2.95 [75]

1.34 [34]

2.72 [69]

1.10 [28]

Probe*

Input

POWER

SUPPY

OUTPUT

COM

Series CN700 Thermocouple Limit Control

Specifications - Installation and Operating Instructions

The Series CN700 Thermocouple FM Approved Limit Control

provides audible alarm status along with a robust 16 amp relay output. Unit allows the user to easily select automatic or manual reset along with 11 other parameters. The CN700 series has a built in reset button on the front panel or can accept an external reset.

INSTALLATION NOTE: Unit must be mounted away from vibration, impacts, water and

corrosive gases.

Cut hole in panel 2.80 x 1.14 inches (71 X 29 mm).

Apply silicone (or rubber gasket) around the perimeter of the hole to prevent leakage.

Insert unit into the hole of panel.

Wiring Diagram:

*Use underground thermocouples only with 12 VAC/VDC and 24 VAC/VDC models.

SPECIFICATIONS Probe Range: 0 to 700°C (32 to 999°F) for thermocouple J type. 0 to

999°C (32 to 999°F) for thermocouples K or S type.

Input: J, K, or S type thermocouple. Output: 16 A SPDT relay @ 250 VAC resistive. Horsepower Rating (HP): 1 HP. Control Type: ON/OFF; manual/automatic reset. Power Requirements: 110 VAC, 230 VAC, 12 VAC/VDC or 24

VAC/VDC (depending on model).

Power Consumption: 4 VA. Accuracy: ±1% FS. Display: 3-digit, red, 1/2˝ (12.7 mm) digits, plus sign. Resolution: 1°. Memory Backup: Nonvolatile memory. Ambient Operating Temperature: 14 to 131°F (-10 to 55°C). Storage Temperature: -4 to 176°F (-20 to 80°C). Weight: 2.3 oz (65 g). Front Panel Rating: IP64. Agency Approvals: CE, FM, UL.

List of Parameters

Description

Set Point

Differential or Hysteresis

Lower Value for SP

Higher Value for SP

Reset of Control

High or low limit temperature

Minimum stopping time

Output status with probe

Energize on limit condition

Ambient Probe Adjustment

Ambient Probe Type

Access code to parameters

Units

Degrees Degrees Degrees Degrees Option Option Seconds Range Range Degrees Range Numeric

Range

r1 to r2 1 to 99 0 to r2 r1 to 999 Aut/hoL/PuP Hi/Lo 0 to 999 Off/On Yes/No

-30 yp 30 tcJ, tch, tcS 0 to 255

OMEGA ENGINEERING, INC.

1 - 888 - TC - OMEGA USA & Canada 1 - 203 - 359 - 1660 INTERNATIONAL

Parameter Descriptions: SP = Set Point. Temperature that activates relay output. r0 = Differential or hysteresis. r1 = Lower value for SP. r2 = Higher value for SP. r3 = Reset of control: Automatic, Hold, or Reset on Power Up. d0 = High or low temperature control.

Where TS is the ambient temperature of the probe. If d0 = Hi, r3 = Aut, c3 = No:

If TS ≥ SP relay output OFF, buzzer ON, AL displayed. If TS ≤ SP-r0 relay output ON, buzzer OFF, TS displayed.

If d0 = Hi, r3 = hoL, c3 = No:

If TS ≥ SP relay output OFF, buzzer ON, AL displayed. If TS ≤ SP-r0 it waits for reset to turn relay output ON, buzzer OFF, TS displayed.

If d0 = Hi, r3 = PuP, c3 = No:

When the device is powered up relay output OFF, buzzer ON, AL displayed. If TS ≤ SP relay output OFF, buzzer ON, AL displayed. If TS ≥ SP-r0 it waits for reset to turn relay output ON, buzzer OFF, TS displayed.

Access to all code protected parameters:

Press SET for 8 seconds. The access code value 0 is shown on the display (unit comes with code set at 0 from the factory).

With the UP and DOWN arrows, select proper access code.

Press SET to enter the code. If the code is correct, the first parameter label is shown on the display (SP).

Move the desired parameter with the UP and DOWN arrows.

Press SET to view the value of the parameter on the display.

The value can be modified with the UP and DOWN arrows.

Press SET to enter the value and exit.

Repeat until all necessary parameters are modified.

Press SET and DOWN at the same time to quit programming or wait one minute and the display will automatically exit programming mode.

If d0 = Lo, r3 = Aut, c3 = No:

If TS ≤ SP relay output OFF, buzzer ON, AL displayed. If TS ≥ SP+r0 relay output ON, buzzer OFF, TS displayed.

If d0 = Lo, r3 = hoL, c3 = No:

If TS ≤ SP relay output OFF, buzzer ON, AL displayed. If TS ≥ SP+r0 it waits for reset to turn relay output ON, buzzer OFF, TS displayed.

If d0 = Lo, r3 = PuP, c3 = No:

When the device is powered up relay output OFF, buzzer ON, AL displayed. If TS ≤ SP relay output OFF, buzzer ON, AL displayed. If TS ≥ SP+r0 it waits for reset to turn relay output ON, buzzer OFF, TS displayed.

c0 = Minimum stopping time of the load. c2 = Output status with probe error. c3 = Relay energized or not energized in limit condition. P1 = Ambient probe adjustment. P5 = Ambient probe type. P5 = tcJ (J Type), P5 = tch (K Type), P5 = tcS (S Type). H5 = Access code to parameters (it is set to 0 from factory).

PARAMETER PROGRAMMING

Set Point (SP) is the only parameter the user can access with code protection.

Press SET. SP text will appear on the display.

Press SET again. The real value is shown on the display.

*The keyboard can be reset to ZERO by turning off the controller and turning it on again while keeping the SET key depressed.

Reset an alarm:

When the parameter r3 = hoL, once the relay output and alarm are activated (because of temperature ambient TS), these remain activated until a reset is received (by pressing the reset key or by closing contact in rear labelled input). When d0 = Hi the reset is accepted if temperature ambient is below TS ≤ SP - r0. When d0 = Lo the reset is accepted if temperature ambient TS is over TS ≥ SP + r0.

LED indication, buzzer and display messages:

The LED Alarm indicates if the relay output is connected or not. When the relay output is connected the message AL is displayed alternated with the temperature ambient of the probe.

In normal operation the probe temperature will be shown on the display. In case of alarm or error, the following messages can be shown:

Erl = memory error

ooo = open probe error

--- = ambient temperature out to range

In case of alarm or error the internal buzzer is activated. The buzzer can be silenced by pressing the SET and DOWN arrows at the same time (when a new alarm or error occurs the buzzer will sound again).

The value can be modified with the UP and DOWN arrows.

Press SET to enter any new values.

Press SET and DOWN at the same time to quit programming or wait one minute and the display will automatically exit the programming mode.

M-4628/0208 FR# R7-443532-01 Rev. 2

MAINTENANCE

Upon final installation of the Series CN700 Thermocouple Limit Control, no routine maintenance is required. A periodic check of the system calibration is recommended. The Series CN700 is not field serviceable and should be returned if repair is needed (field repair should not be attempted and may void warranty). Be sure to include a brief description of the problem plus any relevant application notes. Contact customer service to receive a return goods authorization number before shipping.

Cleaning and Repair:

Clean the surface of the display controller with a soft damp cloth. Never use abrasive detergents, petrol, alcohol or solvents.

OMEGA ENGINEERING, INC.

1 - 888 - TC - OMEGA USA & Canada 1 - 203 - 359 - 1660 INTERNATIONAL