Novus N321 Operating Manual

TEMPERATURE CONTROLLER
N321
OPERATING MANUAL - V1.8x I
The N321 is a temperature 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 output 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.

SPECIFICATIONS

INPUT SENSOR: The sensor is chosen by the user at the time of purchase and is
presented on the upper side of the equipment box. The options are:
• Thermistor NTC, 10 kΩ @ 25 °C; Range: –50 to 120 °C (–58 to 248 °F);
Accuracy: 0.6 °C (1.1°F);
Maximum error in the interchangeability of original NTC sensors: 0.75 °C
(1.35 °F). This error can be eliminated through the offset parameter of the
equipment.
Note: For the NTC thermistor option, the sensor comes with the equipment.
Its operating range is limited to –30 to +105 °C (–222 to +221 °F). It has cable
of 3 m in length, 2 x 0.5 mm², and can be extended up to 200 meters.
• Pt100; Range: –50 to 300 °C (–58 to 572 °F); α= 0,00385; 3 wires;
Accuracy: 0.7 °C (1.3 °F); according to IEC-751 standards;
• Pt1000; Range: –200 to 530 °C (–328 to 986 ºF); α= 0,00385; 3 wires;
Accuracy: 0.7 °C (1.3 °F);
• Thermocouple type J; Range: 0 to 600 °C (32 to 1112 °F); Accuracy: 3 °C
(5.4 °F);
• Thermocouple type K; Range –50 to 120 °C (–58 to 248 °F); Accuracy: 3 °C
(5.4 °F);
• Thermocouple type T; Range: –50 to 120 °C (–58 to 248 °F); Accuracy: 3 °C
(5.4 °F);
Thermocouples according to IEC-584 standards.
WARM-UP: ............................................................................................ 15 minutes
MEASUREMENT RESOLUTION:
From –19.9º to 199.9º display units with NTC, Pt100 and Pt1000: .................... 0.1
Elsewhere: ......................................................................................................... 1
Note: The equipment keeps its precision all over the range, despite the lack of
display resolution in a part of the range does not allow its visualization.
OUTPUT1: ........... Relay SPDT; 1 HP 250 Vac / 1/3 HP 125 Vac (16 A Resistive)
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
ENVIRONMENT: ....................... Operating temperature: 0 to 40 ºC (32 to 104 ºF)
.................................................... Storage temperature: -20 to 60 ºC (-4 to 140 ºF)
....................................................... 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.
Fig. 1 below shows the controller connections to sensor, mains and outputs.
Man 5001222
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
0
1
2
3
Upon power-up, the N321 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
Pressing again to go back to level 0.
To access level 2 of parameters, press
message is shown. Release the
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
to alter a parameter value.
Notes: 1 A parameter configuration is saved when the
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 (SP) parameter is available, alternating the name
with its respective value. Adjust the desired temperature for setpoint by clicking on
the and keys.
Fig. 1 – N321 terminals
Function
Temperature measurement
Setpoint Adjustment
Configuration
Calibration
for 1 second until the "SP1" message shows up.
for 2 seconds until the "uNT"
key to remain in this level. Each new
and keys
key is pressed to
Temperature adjustment for control OUTPUT 1. SP value is limited
SP
to the values programmed in SPL and SPk in the programming
Set Point
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.
Temperature Unit - Selects display indication for degrees Celsius
Unt
or Fahrenheit.
0 - Temperature in degrees Celsius
1 - Temperature in degrees Fahrenheit
Input Type - Selects the input sensor type to be connected to the
typ
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
Sensor Offset - Offset value to be added to the measured
ofs
temperature to compensate sensor error.
SP Low Limit - Lower range for SP. SPL must be programmed
spl
with a lower value than spK.
SP High Limit - Upper range for SP. SPx must be greater than
spK
spl.
OUTPUT 1 Hysteresis: defines the differential range between the
Ky5
temperature value at which the OUTPUT 1 is turned on and the
value at which it is turned off. In degrees.
Control action for OUTPUT 1 :
Act
Reverse: For heating applications. Outputs turn on when
0
temperature is lower than SP.
Direct: For cooling applications. Output turns on when
1
temperature is above SP.
Off time - Defines the minimum off time for control OUTPUT 1.
oft
Once OUTPUT 1 is turned off, it remains so for at least the time
Off 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.
On time - Defines the minimum on time for control OUTPUT 1.
ont
Once turned on, OUTPUT 1 remains so for at least the time
on 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.
Delay time to start control. Upon power-on, control OUTPUT 1 is kept
dly
off until the time programmed in dly is elapsed. Its usage is
Delay1
intended to prevent multiple compressors to start simultaneouly
after the turn-on of a system with several controllers. Value in
seconds, 0 to 250 s.