Novus N323 User manual

TEMPERATURE CONTROLLER
N323
OPERATING MANUAL - V1.8x G
Man 5001279
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 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 k
Ω
@ 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 (33.35 °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 –19.9 to 199.9º 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)
OUTPUT2:......................................................................................Relay: 3 A / 250 Vac, SPST
OUTPUT3:......................................................................................Relay: 3 A / 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:.....................................................0 to 40 °C (32 to 104 °F)
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 / Ttype 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.
Fig. 1 below shows the controller connections to sensor, mains and outputs.
Fig. 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
0
Temperature measurement
1
Setpoint Adjustment
2
Configuration
3
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
” message shows up. Pressing
again, the “
SP2
” parameter is presented. Pressing again, the “
SP2
” parameter is
presented. To go back to level 0, press once more.
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 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.
2If 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
and
SP2
) parameters are available, alternating the
names with their respective values. Adjust the desired temperature for each setpoint clicking
on the and keys.
SP1
SetPoint 1, 2 and 3. Temperature adjustment for control OUTPUT.
SP
value
is limited to the values programmed in
SPL
and
SPk in the programming
level (Parameter configuration, level 2).
Sp2
Sp3
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– 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
- 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
and
SP2
.
SPL must be
programmed with a lower value than
spK
.
spK
SP High Limit
- Upper range for
SP1
and
SP2
.
SPx
must be greater than
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
Action 2 - Control OUTPUT 2 and OUTPUT3 action or Alarm functions:
0
Reverse control action (heating).
1
Direct control action (cooling).
2
Low (minimum) temperature alarm.
3
High (maximum) temperature alarm.
4
Alarm for temperature inside the range
5
Alarm for temperature outside the range.
6
Low temperature alarm with initial blocking.
7
High temperature alarm with initial blocking.
8
Inside range alarm with initial blocking.
9
Outside range alarm with initial blocking.
The section Working with the Controller describes how these functions work.
Ac3
(nt
Control - Associates Setpoints and Outputs.
0
Setpoint 1 is assigned to OUTPUT1 and Setpoint
2 to OUTPUT2
(factory setting).
1
Setpoint 1 is assigned to OUTPUT2 where as Setpoint 2 is directed to
OUTPUT1.
ky1
ky2
Ky3
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.

dl1
Dl2
Dl3
Delay 1, 2 and 3 - Delay time to start control. Upon power-on, control OUTPUT
1 is kept off until the time programmed in
dl1
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.
of1
Of2
Of3
Off time 1, 2 and 3 - Defines the minimum off time for control OUTPUT.
Once OUTPUT 1 is turned off, it remains so for at least the time programmed
in
of1. 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
of1
to zero. Value in seconds, 0
to 999 s.
On1
On2
On3
On time 1, 2 and 3 - Defines the minimum on time for control OUTPUT 1.
Once turned on, OUTPUT 1 remains so for at least the time programmed in
on1. 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
on1
to zero. Value in seconds,
0 to 999 s.
2t1
3t1
Timer T1
Time interval T1 for alarm temporization. Defines the temporization mode
and interval, as shown in Table 4. Adjustable from 0 to 1
999 seconds.
Available only when outputs 2 or 3 are configured as alarms.
2t2
3t2
Timer T2
Time interval T2 for alarm temporization. Defines the temporization mode
and interval, as shown in Table 4. Adjustable from 0 to 1999 seconds.
Available only when outputs 2 or 3 are configured as alarms.
Add
Address - Controllers with the optional RS485 Modbus RTU communication
interface have the
Add
parameter at the Configuration
level. Set a unique
Modbus address for each equipment connected to the network. Address range
is from 1 to 247.
Level 3 – Calibration Level
The controller is factory calibrated. The following parameters should be accessed only by
experienced personnel. To enter this cycle, the key must be kept pressed for 4 seconds.
Don’t press the and keys if you are not sure of the calibration procedures.
Just press the key a few times until the temperature measurement level is reached
again.
pas
Password - Enter the correct password to unlock write operations for the
parameters in the following levels.
[Al
Calibration low
- Offset value of the input. It adjusts the lower
measurement range of the sensor.
[Ak
Calibration High- Gain calibration. It adjusts the upper measurement
range of the sensor.
[JL
Cold Junction Offset calibration
- This parameter is available only for
thermocouple.
FA(
Factory Calibration - Restores factory calibration parameters. Change from
0to 1to restore the calibration parameters with factory values.
Prt
Protection
- Defines
the levels of parameters that will be password
protected. See "Configuration Protection" for details.
Pa(
Password Change - Allows changing the current password to a new one.
Values from 1 to 999 are allowed.
Sn2
Serial number - First part of the controller electronic serial number.
sn1
Serial number - Second part of the controller electronic serial number.
sn0
Serial number
- Third part of the controller electronic serial number.
WORKING WITH THE CONTROLLER
Multiple output controllers are suited for controlling multiple stage systems.
Other applications require OUTPUT 1 to be the control output and OUTPUT 2 to be the alarm.
In a multiple stage application,
SP1,
SP2
and
SP3
are configured to operate at different
temperatures, creating a progressive sequence for turning on the outputs (compressors) in
response to a system demand.
The output delays for turning on the compressors (
dL1
,
dl2
and
dL3
) cause the
compressors to be turned on one by one, minimizing energy demand.
Another usage for multiple output controllers is in systems that require automatic selection
between cool and heat action. In these applications, one output is configured as reverse
action (heating) and the other as direct action (refrigeration).
Alarm Functions
There are eight distinct alarm functions implemented in OUTPUT 2 and 3, selected by the
parameter
Ac2
and
ac3
, described below:
2
- Low temperature alarm – OUTPUT is turned on when the measured temperature falls
below the respective set point value.
3
- High temperature alarm – OUTPUT is turned on when the measured temperature
exceeds the respective set point value.
4
- Inside range alarm – OUTPUT 2 is turned on when the measured temperature is within
the range defined by:
(
SP1
–
SP2
) and (
SP1
+
SP2
) or (
SP1
–
SP3
) and (
SP1
+
SP3
)
5
- Outside range alarm: OUTPUT 2 is turned on when the temperature falls outside the
range defined by:
(
SP1
–
SP2
) and (
SP1
+
SP2
) or (
SP1
–
SP3
) and (
SP1
+
SP3
)
Functions
6
,
7
,
8
e
9
are identical to the above ones except that they incorporate the Initial
Blocking feature, which inhibits the output if an alarm condition is present at start-up. The
alarm will be unblocked after the process reaches a non-alarm condition for the first time.
Alarm Timer
Alarms can be configured for timed operation. Three operation modes can be programmed:
alarm delay, alarm timed pulse or alarm oscillator. Alarm temporization is available only for
outputs 2 and 3 and is configured through parameters: “
2t1
”, “
3t1
”, “
2t2
” and “
3t2
”.
Table 4 shows these advanced functions. Times T1 and T2 can be programmed from 0 to
1999 seconds. Programming 0 (zero) in the timer parameters T1 and T2 disables the timer
function.
The output status led P2 and P3 in the controller panel, signals when the control output is on.
Advanced
Function
T1 T2 ACTION
Normal Operation
0 0
Alarm Event
Alarm
Output
Delayed 0 1 to 1999 s
Alarm Event
Alarm
Output
T2
Pulse 1 to 1999 s 0
Alarm Event
Alarm
Output
T1
Oscillator 1 to 1999 s 1 to 1999 s
Alarm Event
Alarm
Output
T1
T2
T1
Table 4 – Timer Alarm Functions 1 and 2
CONFIGURATION PROTECTION
A protection system to avoid unwanted changes to the controller parameters is implemented.
The level of protection can be selected from partial to full. The following parameters are part
of the protection system:
Pas
When this parameter is presented, the correct password should be entered to allow
changes of parameters in the following levels.
Prt
Defines the level of parameters that will be password protected:
1 - Only calibration level is protected (factory configuration);
2 - Calibration and Configuration levels are protected;
3 - All levels are protected - calibration, Configuration and setpoints.
PA(
Parameter for definition of a new password. Since it is located in the calibration level,
can only be changed by a user that knows the current password. Valid passwords are
in the range 1 to 999.
CONFIGURATION PROTECTION USAGE
PAS
parameter is displayed before entering a protected level. If the correct password is
entered, parameters in all following levels can be changed. If wrong or no password is
entered, parameters in the following levels will be read only.
Important notes:
1- After five consecutive attempts to enter a wrong password, new tentative will be blocked
for the next 10 minutes. If the current valid password is unknown, the master password
can be used only to define a new password for the controller.
2 - The password for a brand new device is 111.
ERROR MESSAGES
Sensor measurement errors force the controller outputs to be turned off. The cause for these
errors may have origin in a bad connection, sensor defect (cable or element) or system
temperature outside the sensor working range. The display signs related to measurement
errors are shown below:
Measured temperature exceeded maximum allowed ran
ge for the
sensor. Broken Pt100, Pt1000 or T/C. Short circuited NTC sensor.
Measured temperature is below minimum measurement range of the
sensor. Short circuited Pt100, Pt1000 or T/C. Broken NTC.
PRODUCT IDENTIFICATION
The label attached to the controller case identifies the model and the optional present in the
product, as described below:
MODEL: N323 - A - B - C, where:
A: Input Sensor: NTC or Pt100 or Pt1000 or J/K/T (Thermocouples)
B: Digital communication: blank or 485 (RS485, Modbus protocol)
C. Voltage rating: blank (100-240 Vac/dc) or 24V (24 Vac/dc);
TECHNICAL ASSISTANCE
If you encounter a problem with your controller, review the configuration with regard to inputs,
outputs, alarms, etc. If the problem persists, contact your supplier or Novus at
[e-mail].
WARRANTY
Warranty conditions are available on our website www.novusautomation.com/warranty.