scigiene N321R Operating Manual

TEMPERATURE CONTROLLER
N321R
OPERATING MANUAL V1.8x
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 kΩ @ 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; α= 0,00385; 3-wire;
Accuracy: 0.7 °C; IEC-751;
• Pt1000; Type: Range: –200 to 530 °C; α= 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.
............................................ 100 to 240 Vac/dc ±10 %
POWER SUPPLY:
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
Protection: Box IP42, Frontal panel IP65
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.
* 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
0
1
2
3
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
Case Polycarbonate UL94 V-2
shown on the display. This is the parameter level 0 (temperature measurement level).
To access level 1, press
again to go back to level 0.
Suitable wiring: Up to 4.0 mm²
To access level 2 of parameters, press
Release the
to the next parameter in that level. At the end of the level, the controller returns to the first
level (0).
Use the
Notes:
Fig. 01 - N321R terminals
Function
Temperature measurement
Setpoint Adjustment / Voltage indication
Configuration
Calibration
for 1 second until the "SP" message shows up. Pressing
for 2 seconds until the "uNT" message is shown.
key to remain in this level. Each new pressing on the
and keys to alter a parameter value.
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
keys.
The screen voltage measurement. For values lower than 150 Vac and
U
higher than 254 Vac presents the message 0.
Voltage
Function available only for model N321R-NTC-LVD.
Temperature adjustment for control OUTPUT 1. SP value is limited to the
SP
values programmed in SPL and SPk in the programming level (Parameter
Set Point
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
name and respective value.
Temperature Unit. Selects display indication for degrees Celsius or
Unt
Fahrenheit.
0 Temperature in degrees Celsius. (factory default)
1 Temperature in degrees Fahrenheit.
Sensor Offset - Offset value to be added to the measured temperature to
ofs
compensate sensor error.
SP Low Limit - Lower range for SP. SPL must be programmed with a
spl
lower value than spK.
SP High Limit - Upper range for SP. SPx must be greater than spl.
spK
OUTPUT 1 Hysteresis: Defines the differential range between the OUTPUT
kys
1 temperature value at which it is turned off. In degrees.
Histeresis
Off time - Defines the minimum off time for control OUTPUT 1. Once
oft
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.
On time - Defines the minimum on time for control OUTPUT 1. Once
ont
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.
Delay time to start control. Upon power-on, control OUTPUT 1 is kept off
dly
until the time programmed in dly is elapsed.
Delay
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.
Time base for dfi:
dib
Seconds
Defrost 0
Interval Base
Time base for dft:
dtb
key will advance
Seconds
Defrost Time 0
Base
Interval between defrost cycles. Can be selected 0 to 999 seconds/
dfi
minutes/hours, according the value specified at dib.
Defrost
interval
Defrost duration. Can be 1 to 999 seconds / minutes / hours, according the
Dft
value specified at dtb.
Defrost time
and
keys to set the value. The display alternates the parameter
Minutes Hours
1 2
Minutes Hours
1 2