NOVUS N323 User Manual

N323

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TEMPERATURE CONTROLLER

N323

OPERATING MANUAL - V1.8x A

MAN001279

SAFETY SUMMARY

The symbols below are used on the equipment and throughout this document to draw the
user’s attention to important operational and safety information.

CAUTION or WARNING:

Read complete instructions prior to

installation and operation of the unit.

CAUTION or WARNING:

Electrical Shock Hazard

All safety related instructions that appear in the manual must be observed to ensure personal
safety and to prevent damage to either the instrument or the system. If the instrument is used
in a manner not specified by the manufacturer, the protection provided by the equipment may
be impaired.

SPECIFICATIONS

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

NTC Thermistor, 10 k

Ω

@ 25 °C; range: –50 to 120 °C (-58 to 248 °F); Accuracy: 1,0 °C

(1,1 °F), with original sensor;
Sensor interchangeability: 1 °C (1.35 °F). This error can be compensated by the offset
parameter in the controller.

Pt100 (

αα

= 385); Range: –50 to 300 °C (-58 to 572 °F); Accuracy: 0,7 °C (1.3 °F); IEC-751.

Pt1000 (

αα

= 385); 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 °C (32 to 1112 °F); Accuracy: 3 °C (5.4 °F);

Type K: Range: -50 to 1000 °C (-58 to 1832 °F); Accuracy: 3 °C (5.4 °F);

Type T: Range: -50 to 400 °C (-58 to 752 °F); Accuracy: 3 °C (5.4 °F);

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 199.9º With NTC, Pt100 and Pt1000:................................................................. 0.1
elsewhere:.............................................................................................................................1

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

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

OUTPUT3:.......................................................................................Relay: 3A / 250 Vac, SPST

POWER SUPPLY: ................................. 100~240 Vac (± 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: 74 x 32 x 75 mm

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

ENVIRONMENTAL CONDITIONS:............................................................................5 to 50 °C
Maximum RH: 80 % up to 31 %, decreasing linearly to 50 % at 40 °C. Installation category II.
Pollution degree 2. Altitude < 2000 m.

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.

The N323 is a 3-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 3 independent outputs can be used as control or
alarm. The features of a particular model (input sensor type, sensor range, mains supply, etc)
are identified by the label placed on the controller body.

ELECTRICAL WIRING

It is important to follow the recommendations below:

•

Signal wires should be installed in grounded conduits and away from power or contactor

wires.

•

The instrument should have its own power supply wires that should not be shared with

electrical motors, coils, contactors, etc.

•

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

contactor coils or any other inductors.

•

The use of protection devices.

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

Figure 1 – N323 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.

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

Configuration

Calibration

Upon power-up, the N323 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 “SP1

SP1

SP1” message shows up. Pressing

again, the “SP2

SP2

SP2” parameter is presented. Pressing

again, the “SP2

SP2

SP2” parameter is

presented. To go back to level 0, press

once more.

To access level 2 of paramenters, press

for 2 seconds until the “uNT

uNT

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.

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

SP1

SP1 and SP2

SP2

SP2) parameters are available, alternating the

names with their respective values. Adjust the desired temperature for each setpoint clicking

on the

and

keys.

SP1

Sp2

Sp3

SetPoint 1, 2 and 3. Temperature adjustment for control OUTPUT. SP

SP value

is limited to the values programmed in SPL

SPL

SPL and SPk

SPk

SPk in the programming

level (Parameter configuration, level 2).

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

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

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

SP1

SP1 and SP2

SP2

SP2. SPL

SPL

SPL must be

programmed with a lower value than spK

spK

spK.

spK

SP High Limit - Upper range for SP1

SP1

SP1 and SP2

SP2

SP2. SPx

SPx

SPx must be greater than

spl

spl.

Ac1

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.

Ac2

Ac3

Action 2 - Control OUTPUT 2 and OUTPUT3 action or Alarm funtions:

Reverse control action (heating).

Direct control action (cooling).

Low (minimum) temperature alarm.

High (maximum) temperature alarm.

Alarm for temperature inside the range

Alarm for temperature outside the range.

Low temperature alarm with initial blocking.

High temperature alarm with initial blocking.

Inside range alarm with initial blocking.

Outside range alarm with initial blocking.

The section Working with the Controller describes how these functions
work.

(nt

Control - Associates Setpoints and Outputs.

Setpoint 1 is assigned to OUTPUT1 and Setpoint 2 to OUTPUT2
(factory setting).

Setpoint 1 is assigned to OUTPUT2 where as Setpoint 2 is directed to
OUTPUT1.

ky1

ky2

Ky3

Hysteresis

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.

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