Novus N322 Operator's Manual

The N322 is a 2-output digital electronic thermostat 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. The features of a particular model (input
sensor type, sensor range, mains supply, etc) are identified by the label placed on
the thermostat body.
SPECIFICATIONS
INPUT SENSOR: The input sensor type can be chosen form the options below
(specified when placing the order):
NTC Thermistor, 10 kΩ Ω Ω 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 thermostat.
Pt100 (α α α α = 385); Range: –50 to 300 °C (-58 to 572 °F);
Accuracy: 0,7 °C (1.3 °F); IEC-751.
Pt1000 (α α α α = 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 thermostat 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 (10 A Resistive)
OUTPUT2:................................................................... 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 thermostat.
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 °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)
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.
Figure 1 below shows the thermostat connections to sensor, mains and outputs.
Figure 1 – N322 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 thermostat 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
2 Configuration
3 Calibration
Upon power-up, the N322 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
Pressing again, the "SP2 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
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 thermostat 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
thermostat is de-energized.
2 If no keyboard activity is detected for over 20 seconds, the thermostat
saves the current parameter value and returns to the measurement
level.
Level 1 –Setpoint Adjustment
SP1 and SP2 SP2) parameters are available,
In this level only the Setpoint (SP1 SP1 SP1 SP2 SP2
alternating the names with their respective values. Adjust the desired temperature
for each setpoint clicking on the and keys.
SP1 SP1 SP1 SP1 Temperature adjustment for control OUTPUT 1. SP1
limited to the values programmed in SPL SPL and SPk
SPL
Set Point 1
programming level (Parameter configuration, level 2).
SP2 SP2 Temperature adjustment for control OUTPUT 1. SP2
SP2 SP2
limited to the values programmed in SPL SPL and SPk SPL SPL
Set Point 2
Level 2 – Configuration - Parameters configuration Level
Contains the configuration parameters to be defined by the user, according to the
system's requirements. Use
alternates the parameter name and respective value.
Temperature Unit - Selects display indication for degrees
Unt Unt Unt Unt
Celsius or Fahrenheit.
Input Type - Selects the input sensor type to be connected to the
typ typ
typ typ
controller. Available only for thermocouple models, allowing
selection of types J, K and T.
Sensor Offset - Offset value to be added to the measured
ofs ofs ofs ofs
temperature to compensate sensor error.
SP Low Limit - Lower range for SP1
spl spl spl spl
programmed with a lower value than spK
SP High Limit - Upper range for SP1
spK spK spK spK
greater than spl
OUTPUT 1 Hysteresis: defines the differential range between
ky1 ky1
ky1 ky1
the temperature value at which the OUTPUT 1 is turned on and
the value at which it is turned off. In degrees.
OUTPUT 2 Hysteresis: defines the differential range between
ky2 ky2 ky2 ky2
the temperature value at which the OUTPUT 2 is turned on and
the value at which it is turned off. In degrees.
SP1 SP1" message shows up. SP1
Control action for OUTPUT 1 :
Ac1 Ac1 Ac1 Ac1
uNT uNT uNT"
and keys
Action 2 - Control OUTPUT 2 action or Alarm funtions:
Ac2 Ac2 Ac2 Ac2
key is pressed to
The section Working with the Thermostat describes how these
functions work.
(nt (nt (nt (nt Control - Associates Setpoints and Outputs.
SP1 SP1 SP1 value is
SPk in the Control
SPL SPk SPk
1 1 1 1
SP2 SP2 SP2 value is
SPk SPk SPk
ELECTRONIC THERMOSTAT
N322
OPERATING MANUAL - V1.7x
and keys to set the value. The display
0 0 0 0 - Temperatura em graus Celsius
1 1 1 1 - Temperatura em graus Fahrenheit
0 0 0 0 - Thermocouple type J
1 1 1 1 - Thermocouple type K
2 2 2 2 - Thermocouple type T
SP1 and SP2 SP1 SP1 SP2 SP2. SPL SP2 SPL must be SPL SPL
spK spK. spK
SP1 and SP2 SP2. SPx SPx must be
SP1 SP1 SP2 SP2 SPx SPx
spl. spl spl
0 0 0 0 Reverse: For heating applications. Outputs turn on when
temperature is lower than SP.
1 1 1 1 Direct: For cooling applications. Output turns on when
temperature is above SP.
0 0 0 0 Reverse control action (heating).
1 1 1 1
Direct control action (cooling).
2 2 2 2 Low (minimum) temperature alarm.
3 3 3 3
High (maximum) temperature alarm.
4 4 4 4 Alarm for temperature inside the range
5 5 5 5
Alarm for temperature outside the range.
6 6 6 6 Low temperature alarm with initial blocking.
7 7 7 7 High temperature alarm with initial blocking.
8 8 8 8 Inside range alarm with initial blocking.
9 9 9 9 Outside range alarm with initial blocking.
0 0 0 0 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.