NOVUS N321R - Manual

TEMPERATURE CONTROLLER
N321R
OPERATING MANUAL V1.8x
Man 5001227
The N321R is a controller for cooling applications, with defrost function (forced compressor
shut-down). It accepts NTC, Pt100 and Pt1000 temperature probes, depending on the
product code (the user must observe the measurement range of the selected sensor). The
N321R control output is capable of driving a compressor load of up to 1 HP directly.
The features of a particular model (input sensor type, sensor range, mains supply, etc) are
identified by the label placed on the thermometer body.
SPECIFICATIONS
SENSOR INPUT: The input sensor type can be chosen form the options below (specified
when placing the order):
Thermistor NTC, Type 10 k @ 25 °C; Range: –50 to 120 °C (-58 to 248 ºF);
Accuracy: 0.6 °C;
Sensor interchangeability: 0.75 °C. This error can be compensated by the offset
parameter in the controller.
Pt100; Type: Range: –50 to 300 °C; = 0,00385; 3-wire;
Accuracy: 0.7 °C; IEC-751;
Pt1000; Type: Range: –200 to 530 °C; = 0.00385; 3-wire;
Accuracy: 0.7 °C;
Note: Two 3-meter probe cable are bundled with the instrument. The cable can be extended
up to 200 m.
Measurement Resolution:.............................................................. 0.1 º from –19.9 to 199.9 º
..................................................................................... 1 ºC elsewhere
OUTPUT1: ............................... Relay SPDT; 1 HP 250 Vac / 1/3 HP 125 Vac (16 A Resistive)
........................................................................................ Optionally: Pulse, 5 Vdc, 25 mA max.
POWER SUPPLY:
.............................................100 to 240 Vac/dc 10 %
Optionally: ................................................ 12 to 30 Vdc
Mains frequency: .......................................... 50~60 Hz
Power consumption: ............................................. 5 VA
Dimensions: Width x Height x Depth: ............................................ 75 x 33 x 75 mm
Weight: .......................................................................................100 g
Panel cut-out: .................................................................... 70 x 29 mm
ENVIRONMENT: Operating temperature: ........................ 0 to 40 °C (32 to 122 ºF)
Storage temperature: ........................ -20 to 60 °C (-4 to 140 ºF)
Relative humidity: ................................................. 20 to 85 % RH
Case Polycarbonate UL94 V-2
Protection: Box IP42, Frontal panel IP65
Suitable wiring: Up to 4.0 mm²
Serial interface not isolated from input circuitry.
Serial interface isolated from input circuitry, except in 24 V powered model.
ELECTRICAL WIRING
Fig. 01 below shows the controller connections to sensor, mains and outputs.
Fig. 01 - N321R terminals
* The serial communication interface is optional.
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.
INSTALATION
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 inductor.
Use protection devices like circuit breakers and fuses.
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
0 Temperature measurement
1 Setpoint Adjustment / Voltage indication
2 Configuration
3 Calibration
Upon power-up, the N323R 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. Pressing
again to go back to level 0.
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 that 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 (SP) parameters are available, alternating the names with their
respective values. Adjust the desired temperature for each setpoint clicking on the
and
keys.
U
Voltage
The screen voltage measurement. For values lower than 150 Vac and
higher than 254 Vac presents the message 0.
Function available only for model N321R-NTC-LVD.
SP
Set Point
Temperature adjustment for control OUTPUT 1. SP value is limited to the
values programmed in SPL and 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. (factory default)
1 Temperature in degrees Fahrenheit.
ofs Sensor Offset - Offset value to be added to the measured temperature to
compensate sensor error.
spl SP Low Limit - Lower range for SP. SPL must be programmed with a
lower value than spK.
spK SP High Limit - Upper range for SP. SPx must be greater than spl.
kys
Histeresis
OUTPUT 1 Hysteresis: Defines the differential range between the OUTPUT
1 temperature value at which it is turned off. In degrees.
oft Off time - Defines the minimum off time for control OUTPUT 1. Once
OUTPUT 1 is turned off, it remains so for at least the time programmed in
oft
. This parameter is intended for refrigeration systems where longer
compressor life is desired. Value in seconds, 0 to 999 s.
ont On time - Defines the minimum on time for control OUTPUT 1. Once turned
on, OUTPUT 1 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.
dib
Defrost
Interval Base
Time base for dfi:
0 Seconds 1 Minutes 2 Hours
dtb
Defrost Time
Base
Time base for dft:
0 Seconds 1 Minutes 2 Hours
dfi
Defrost
interval
Interval between defrost cycles. Can be selected 0 to 999 seconds/
minutes/hours, according the value specified at dib.
Dft
Defrost time
Defrost duration. Can be 1 to 999 seconds / minutes / hours, according the
value specified at dtb.
dfh
Defrost hold
Hold the temperature indication throughout the defrost interval or the time
defined by this parameter.
0
Do not hold the indication during the defrost;
1 to 250 Time (seconds / minutes / hours) besides the defrost time the
indication will remain held.