Novus N322T User Manual download pdf (Page 1)

TEMPERATURE CONTROLLER

N322T

OPERATING MANUAL - V1.8x

Man 5001237

The N322T is a 2-output digital electronic controller for heating and cooling applications. It is available

with NTC thermistor input sensor, Pt100, Pt1000 or J/K/T type thermocouple. Sensor offset correction

is provided. The 2 independent outputs can be used as control or alarm.

Displays the Compressor Protection Function by Supply Voltage Monitoring, important in the

protection of compressors for refrigeration systems.

SPECIFICATIONS

INPUT SENSOR: The input sensor type can be chosen form the options below (specified when

placing the order):

 NTC Thermistor, 10 k @ 25 °C; range: –50 to 120 °C (-58 to 248 °F);

Accuracy: 0.6 °C (1.1 °F), with original sensor;

Sensor interchangeability: 0.75 °C (1.35 °F). This error can be compensated by the offset

parameter in the controller.

 Pt100 (= 0.00385); Range: –50 to 300 °C (-58 to 572 °F);

Accuracy: 0.7 °C (1.3 °F); IEC-751.

 Pt1000 (= 0.00385); Range: –200 to 530 °C (-328 to 986 °F);

Accuracy: 0.7 °C (1.3° F);

 J, K or T thermocouple (IEC-584):

 Type J: Range: 0 to 600 ºC (32 to 1112 ºF); Accuracy: 3 ºC (5.4 ºF);

 Type K: Range: -50 to 1000 ºC (-58 to 1832 ºF); Accuracy: 3 ºC (5.4 ºF);

 Type T: Range: -50 to 400 ºC (-58 to 752 ºF); Accuracy: 3 ºC (5.4 ºF);

Note: In the controller with NTC input, a 3 m-sensor cable is bundled with the instrument. The

cable can be extended up to 200 m.

WARM-UP: .......................................................................................................................... 15 minutes

MEASUREMENT RESOLUTION:

From –19.9 to 199.9 º with NTC, Pt100 and Pt1000: ........................................................................... 0.1

Elsewhere: ....................................................................................................................................... 1

OUTPUT1: ......................................... Relay SPDT; 1 HP 250 Vac / 1/3 HP 125 Vac (16 A Resistive)

................................................................................................... Optionally: Pulse, 5 Vdc, 25 mA max.

OUTPUT2: .......................................................................................... Relay: 3 A / 250 Vac, SPST-NA

POWER SUPPLY: ........................................ 100~240 Vac/dc (± 10 %) or 24 Vdc/ac (12~30 Vdc/ac)

...................................................................... Mains frequency: 50~60 Hz. Power consumption: 5 VA

Caution: check the power supply specification before energizing the controller.

DIMENSIONS: .................................................................... Width x Height x Depth: 75 x 33 x 75 mm

............................................................................................ Panel cut-out: 70 x 29 mm; Weight: 100 g

ENVIRONMENT: .................................................... Operating temperature: 0 to 40 °C (32 to 122 °F)

.................................................................................. Storage temperature: -20 to 60 °C -4 to 140 °F)

.....................................................................................Relative humidity: 20 to 85 % non-condensing

CASE: ..........................................Polycarbonate UL94 V-2; Protection: Front panel: IP65, Box: IP42

.............................................................................................................. Suitable wiring: Up to 4.0 mm²

RS-485 digital communication; RTU MODBUS protocol (optional)

Serial interface not isolated from input circuitry.

Serial interface isolated from input circuitry, except in 24 V powered model.

ELECTRICAL WIRING

Fig. 1 below shows the controller connections to sensor, mains and outputs.

Fig. 1 - N322T terminals

Pt100 with 3 conductors: Terminals 11, 12 and 13 must have the same wire resistance for proper

cable length compensation. For 2 wire Pt100, short circuit terminals 11 and 13.

Recommendations for the installation

 Temperature sensor drivers must go through the plant separate system for drivers of control

output and power supply if possible electroducts terrified.

 The controller's power should come preferably a campus network for instrumentation or

different from that used by phase control output.

 Installing RC filters (47 R and 100 nF, series combination) is strongly recommended at

contactor coils or any other inductors.

OPERATION

The controller requires the internal parameters to be configured according to the intended use for

the instrument. The parameters are organized in 4 groups or levels:

Level

Function

Temperature measurement

Setpoint adjustment / Voltage indication

Configuration

Calibration

Upon power-up, the N322T display shows for 1 second its firmware version. This information is

useful when consulting the factory.

Then, the temperature measured by the sensor is shown on the display. This is the parameter level

0 (temperature measurement level).

To access level 1, press for 1 second until the “SP” message shows up. To go back to level 0,

press once more.

To access level 2 of parameters, press for 2 seconds until the “uNT” message is shown.

Release the key to remain in this level. Each new pressing on the key will advance to the

next parameter in the level. At the end of the level, the controller returns to the first level (0).

Use the and keys to alter a parameter value.

Notes: 1 A parameter configuration is saved when the

key is pressed to advance to the

next parameter in the cycle. The configuration is stored in a non-volatile memory,

retaining its value when the controller is de-energized.

2 If no keyboard activity is detected for over 20 seconds, the controller saves the

current parameter value and returns to the measurement level.

Level 1 – Setpoint Adjustment

In this level only the Setpoint (SP1 and SP2) parameters are available, alternating the names with

their respective values. Adjust the desired temperature for each setpoint clicking on the and

keys.

Voltage - The screen voltage measurement. For values lower than 150 Vac and

higher than 254 Vac presents the message 0.

Function available for model N322T-NTC-LVD.

Set Point - Temperature adjustment for control. SP value is limited to the values

programmed in SPL and SPk in the programming level.

Level 2 – Configuration - Parameters configuration Level

Contains the configuration parameters to be defined by the user, according to the system’s

requirements. Use and keys to set the value. The display alternates the parameter name

and respective value.

Unt

Temperature Unit - Selects display indication for degrees Celsius or Fahrenheit.

0 - Temperature in degrees Celsius

1 - Temperature in degrees Fahrenheit

typ

Input Type - Selects the input sensor type to be connected to the controller.

Available only for thermocouple models, allowing selection of types J, K and T.

0 - Thermocouple type J

1 - Thermocouple type K

2 - Thermocouple type T

ofs

Sensor Offset - Offset value to be added to the measured temperature to

compensate sensor error.

spl

SP Low Limit - Lower range for SP1 and SP2. SPL must be programmed

with a lower value than spK.

spK

SP High Limit - Upper range for SP1 and SP2. SPx must be greater than spl.

kys

OUTPUT Hysteresis: defines the differential range between the temperature

value at which the OUTPUT is turned on and the value at which it is turned off.

In degrees.

ale

Alarm Enable:

0 Alarm disabled;

1 Buzzer alarm and output 2 pulsed (1 second);

2 Buzzer alarm and output 2 pulsed;

3 Output 2 pulsed (1 second);

4 Output 2 pulsed.

Function available for models N322T-NTC and N322TB-NTC.

For N322T-NTC model 1 and 2 parameter work as 3 and 4 parameters

respectively.

Alarm function works only for fot = 2 parameter.

Alt

Alarm Time - Sets the time for which the alarm will be triggered.

1 to 255 seconds

To turn the alarm off before the programmed time, just press for 1 second.

Function available for models N322T-NTC and N322TB-NTC.

Alarm function works only for fot = 2 parameter.

Act

Control action for OUTPUT 1:

0 Reverse: For heating applications. Outputs turn on when temperature is

lower than SP.

1 Direct: For cooling applications. Output turns on when temperature is

above SP.

(nt

Control - Associates Setpoints and Outputs.

0 Setpoint is assigned to OUTPUT1 and Setpoint to OUTPUT2 (factory

setting).

1 Setpoint is assigned to OUTPUT2 where as Setpoint is directed to

OUTPUT1.

oft

Off time - Defines the minimum off time for control OUTPUT. Once OUTPUT is

turned off, it remains so for at least the time programmed in oft. For

thermocouple inputs this parameter is not available. This parameter is intended

for refrigeration systems where longer compressor life is desired. For heating

systems, program oft to zero. Value in seconds, 0 to 999 s.

Ont

On time - Defines the minimum on time for control OUTPUT. Once turned on,

OUTPUT remains so for at least the time programmed in ont. For

thermocouple inputs this parameter is not available. This parameter is intended

for refrigeration systems where increased compressor life is desired. For

heating systems, program ont to zero. Value in seconds, 0 to 999 s.

dly

Delay - Delay time to start control. Upon power-on, control OUTPUT 1 is kept

off until the time programmed in dly is elapsed. Its usage is intended to

prevent multiple compressors to start simultaneously after the turn-on of a

system with several controllers. Value in seconds, 0 to 250 s.

1 2

Fig. 1 - N322T terminals 1

Summary of Contents

Page 1 - Fig. 1 - N322T terminals

TEMPERATURE CONTROLLER N322T OPERATING MANUAL - V1.8x Man 5001237 The N322T is a 2-output digital electronic controller for heating and cooling app

Page 2

Tib T1 Base - Time base for t1: 0 Seconds 1 Minutes 2 Hours t2b T2 Base - Time base for t2: 0 Seconds 1 Minutes 2 Hours t1 Time 1 - Ad

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