Novus N2020 User manual

NOVUS AUTOMATION 1/7
N2020
Controller
TEMPERATURE CONTROLLER
– INSTRUCIONS MANUAL – V1.0x D
SAFETY ALERTS
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:
Read the manual thoroughly
before installing and
operating the equipment.
CAUTION OR DANGER:
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.
INSTALLATION / CONNECTIONS
The controller must be fastened on a panel, following the sequence
of steps described below:
•Prepare a panel cut-out of 45 x 93 mm;
•Remove the mounting clamps from the controller;
•Insert the controller into the panel cut-out;
•Slide the mounting clamp from the rear to a firm grip at the panel.
ELECTRICAL CONNECTIONS
The controller complete set of features is drawn in Fig. 01:
Fig. 01 - Input connections, outputs and power supply
RECOMMENDATIONS FOR THE INSTALLATION
•Leads of input signals may travel the plant, separately of output
and feeding leads, if is possible in grounded conduits.
•All electronic instruments must be powered by a clean mains
supply, proper for instrumentation.
•It is strongly recommended to apply RC'S FILTERS (noise
suppressor) to contactor coils, solenoids, etc.
FEATURES
INPUT TYPE SELECTION
The input type to be used by the controller is defined in the
equipment settings. Table 01 shows the input options available for
the user, one of them must be selected during the controller setting.
TYPE CODE RANGE OF MEASUREMENT
Thermocouple J
Tc j
Range: -110 to 950 °C (-166 to 1742 °F)
Thermocouple K
Tc k
Range: -150 to 1370 °C (-238 to 2498 °F)
Thermocouple T
Tc t
Range: -160 to 400 °C (-256 to 752 °F)
Pt100
Pt
Range: -200 to 850 °C (-328 to 1562 °F)
Table 01 – Inputs types
Fig. 02 - Connection of
thermocouple
Fig. 03 - Connection of 3-wires
Pt100
Notes:
1- The specification of controller accuracy does not consider the
error showed by the temperature sensor used.
2- Suitable extension cables must be used with thermocouples.
3- In order to use 2-wire Pt100 thread, connect 23 and 24 terminals.
The sensor must be connected between 22 and 23 terminals. If
the sensor is 4-wired, keep one of the wires disconnected close to
the controller. The wires used must always have the same section
(same gauge).
OUTPUTS
The controller offers two, three or four output channels, depending on
the loaded optional features. Those channels are configured by the
user to act as control outputs, alarm outputs, LBD Function or PV or
SP retransmission.
OUT1 - Logical pulse, 5 Vdc / 25 mA
Available at terminals 19 and 20 of controller
OUT2 - Relay SPST-NA
Available at terminals 17 and 18 of controller
OUT3 - Relay SPST-NA
Available at terminals 15 and 16 of controller

N2020 Controller
NOVUS AUTOMATION 2/7
OUT4- Analog output:
Electrical current, 0-20 mA or 4-20 mA
Electrical voltage pulse, 10 Vdc / 20 mA
Available at 29 and 30 terminals of controller
CONTROL OUTPUT
It is the output channel which effectively actuates on the process.
Main exit.
ALARM OUTPUT
Output channels which actuates on the protection and signalization
of process condition.
RUN FUNCTION
RUN parameter (
rvn
) works as a main key of output channels of
controller. It enables channels defined as control output and channels
defined as alarm output. With YES in this parameter, the control and
alarm outputs are able to operate, turning on / off, according to the
controller’s determinations. With NO, all outputs remain off, regardless
of the process requirements. In this condition, the controller’s display
starts to show the STOP message, alternately with the measured
temperature value (PV).
This function can also be obtained by the Fkey when configured to
operate in such mode.
AUTOMATIC CONTROL MODE
The controller may act in two different modes of operation: Automatic
mode or Manual mode.
In automatic mode, the controller determines the control output
behavior in order to lead the process up to the defined value in SP. It
determines the duration the control output remains on and off,
balancing the energy quantity applied to the process. In a technical
language: it determines the MV value (Manipulated Variable). This is
the normal mode of the controller operation.
The parameter “
(trl
” defines the control mode to be adopted:
Avto
for automatic control.
Man
for manual control.
This exchange functionality between automatic and manual mode
can also be obtained by the key, when configured to operate in
such mode.
The period (PWM cycle period) is defined in Cycle time parameter
(
(t
). In it, a time interval (seconds), is defined and considered as a
reference for the determination of MV.
For instance: For a 10 seconds interval ((t = 10), 20 % MV means
output on for 2 seconds and off for 8 seconds, balancing the energy
quantity applied to the process.
MANUAL CONTROL MODE
In the manual mode, is the user who determines the control output
behavior. It defines the MV value, this value will not be interfered by
the controller.
By exchanging the automatic mode to manual mode, the value
adopted for MV will be the last value defined automatically by the
controller. It is known as “bumpless transfer”.
ON-OFF CONTROL / PID CONTROL
In the automatic mode, it acts with ON-OFF adjustable hysteresis
control and also with the PID control with the automatic tuning
resource.
ALARM OUTPUT
The controller has two alarms which may be directed for any of the
output channels. These alarms can be configured to operate the
different functions described on Table 02.
off
Alarms turned off.
lo
Alarm of Absolute Minimum
Value. Triggers when the
value of measured PV is
below the value defined for
alarm Setpoint (SPA1 or
SPA2).
SPA1
PV
ki
Alarm of Valor Absolute
Maximum Value. Triggers
when the value of measured
PV is above
the value
defined for alarm Setpoint.
SPA1
PV
dif
Alarm of Differential Value. In this function the
parameters
SPA1
and
SPA2
represent the deviation of
PV in relation to the SP of CONTROL.
SP
PV
SP + SPA1
SP – SPA1
SP
PV
SV – SPA1
SV + SPA1
SPA1 positive SPA1 negative
difl
Alarm of Minimum Differential Value. It triggers when
the value of PV is below the defined point by (using
the Alarm 1 as example):
SP
PV
SP – SPA1
SP
PV
SP –SPA1
SPA1 positive SPA1 negative
difk
Alarm of Valor Maximum Differential Value. Triggers
when the value of PV is above the defined point by
(using Alarm 1 as example):
SP
PV
SP + SPA1
SP
PV
SP + SPA1
SPA1 positive SPA1 negative
ierr
Sensor Break Alarm. Activated when the input signal of
PV is interrupted, out of the range limits or Pt100 in short-
circuit.
Rs
Program Segment Alarms. It acts when a certain
segment of the ramps and soaks programs is
reached. The respective segment is defined on the
creation of ramps and soaks programs.
Table 02 – Alarme functions
Note: Alarm functions on Table 02 are also valid for Alarm 2 (SPA2).
INITIAL BLOCKING OF ALARM
The initial blocking option inhibits the alarm from being recognized
if an alarm condition is present when the controller is first energized
(or after a transition from run YES or NO). The alarm will be enabled
only after the occurrence of a non-alarm condition followed by a new
occurrence for the alarm.
The initial blocking is useful, for instance, when one of the alarms is
configured as a minimum value alarm, causing the activation of the
alarm soon upon the process start-up, an occurrence that may be
undesirable.
The first lock out is not valid for
ierr
function (Open Sensor).
PV AND SP ANALOGICAL RETRANSMISSION
The analogical output, OUT4, when available, may perform the
retransmission of PV or SP values, with 0-20 mA or 4-20 mA signs.
The analogical retransmission is scalable, i.e., it has minimum and
maximum limits, which define the output range, defined in
rtLL
and
rtkL
parameters.
To obtain a retransmission in voltage, the user should install one
shunt resistor (500 Ωmax.) on the analogical output terminals. The
value of this resistor depends on the voltage tension desired.

N2020 Controller
NOVUS AUTOMATION 3/7
LBD – LOOP BREAK DETECTION
The parameter defines a time interval, in minutes, within which the
PV is expect to react to a control output signal. If the PV does not
react properly within the time interval configured in
lbd.t
, the
controller interprets this as a control loop break and signals this
occurrence in the display.
A LBD event may be sent to any output channel. Simply configure
the LBD function to the desired output channel (OUT1 or OUT2): the
selected output will be activated when a LBD condition is detected.
When the
Lbd.t
parameter is programmed with 0 (zero), the LBD
function is disabled.
The LBD is useful in detecting system failures, such us defective
sensors or actuators, loads and power supply, among others.
SAFE OUTPUT VALUE WITH SENSOR FAILURE
This function defines an output value (user defined) to be assigned to
the control output in the event of a sensor failure.
When the input sensor is identified as broken, the controller switches
the control mode to MANUAL while forcing MV to assume the user
configured value in the
1E.ov
parameter. This function requires that
one of the alarms be configured as
1Err
and the
1E.ov
parameter
(control output percentage) programmed with a value other then 0
(zero).
Once this function is triggered, the controller remains in SAFE mode
(MANUAL control output) even after the sensor failure appears to be
fixed. The operator intervention is required for switching back to
AUTO mode.
1E.ov
values are only 0 and 100 % when in ON/OFF control mode.
For PID control mode any value in the range from 0 to 100 % is
accepted.
OFFSET
Allows fine adjustments to the PV reading for compensation of
sensor error.
SOFT START
The soft-start feature avoids abrupt variations in the power delivered
to the load regardless of the system power demand.
This is accomplished by defining a limiting ramp for the control
output. The output is allowed to reach maximum value (100 %) only
after the time programmed (in seconds) in the soft-start parameter
has elapsed.
The Soft-start function is generally used in processes that require
slow start-up, where the instantaneous application of 100 % of the
available power to the load may cause damages to parts of the
system.
In order to disable this function, the soft-start parameter must be
configured with 0 (zero).
Note:
1- This feature is available only with PID (Proportional Band greater
than zero).
2- This feature is disabed if the parameter is set to 0 (zero).
PROGRAMS OF RAMP AND SOAK
The controller allows the creation of one ramps and temperature
soaks program. This program is created from the values definition of
SP and time intervals, defining up to nine (9) program segments.
The figure below shows a program model with 9 segments:
Fig. 04 - Example of ramps and soaks program
The program created is storage permanently on the controller’s ram.
It may be always changed, executed and repeated whenever
necessary.
For the program’s execution:
1- Turn off the outputs (
rvn
=
NO
);
2- Enable the parameter execution
E.Pr
=
yes
;
3- Start-up the outputs: (
rvn
=
yes
).
Once the program execution is started, the controller starts to create
automatically the SP values defined for each program segment. The
SP adjustment on the indication screen is blocked.
Program Toleration Function -
PtoL
The program toleration function “
PtoL
” defines the maximum error
limit between PV and SP values during the program execution. If this
limit is exceeded, the time counting of the segment (Pt1...Pt9) is
stopped until the error is within the established tolerance. With a
value >0 the user indicates in its program that priority must be given
to PV in relation to the indeterminate value times.
If 0 is programmed in the tolerance (
Ptol
= 0), the controller
executes the program defined without considering eventual errors
between PV and SP. Thus, the user defines that the priority has to be
given for the execution time of the program.
Programs with few Segments
For the execution of programs with few segments, it is enough to
program 0 (zero) for the time interval of the segment, which
succeeds the last segment of the desired program.
SP
Time
T1
T2
T3
SP0
SP1
SP2
SP3
T4=0
Fig. 05 - Program example with three segments
Successive Repetitions of a Program
The program created may be repeated for several times, always
restarting immediately after the end of each execution.
The parameter
rPt.p
(rePeat Program) in the Programs cycle
configures the number of times the program must be REPEATED. It
determines the number of executions besides the first execution.
With 0, the program is executed once. It won’t repeat.
Important: After the last execution of the program, all controller
outputs will be turned off and the RUN parameter is OFF.
OPERATION
The controller’s front panel, with its parts, can be seen in the Fig. 06:
Fig. 06 - Identification of the parts referring to the front panel
Display: It shows the variable measured, configuration parameters
symbols and its respective values/conditions.
TUNE indicator: Stays ON while the controller is in tuning process.

N2020 Controller
NOVUS AUTOMATION 4/7
OUT indicator: It shows the instantaneous state of the controller
output(s).
A1 and A2 indicator: signalize the occurrence of alarm situation.
P key: Key used to forward the successive parameters and
parameters cycles.
Increment key and
Decrement key: allow altering the
values / conditions of the parameters.
Back key: allow altering the values of the parameters.
START-UP
Upon the energizing, the controller shows the number of its software
version in the first 3 seconds. Then, it shows the process variable
value (PV) measured (temperature) on the upper display. The SP
value is showed on the lower display. This is the Indication Screen.
To operate in a process, the controller is required to be configured
previously. The configuration consists of a definition of each one of
the several parameters showed. The user must understand about the
importance of each parameter and, for each one, determine one valid
condition or a valid value.
The configuration parameters are together in affinity groups, known
as parameters cycles. The 6 levels of parameters are:
Operation / Tuning / Program / Alarms / Input / Calibration
The Pkey is used for accessing the parameters within a level:
Keeping the Pkey pressed, at every 2 seconds the controller jumps
to the next level of parameters, showing the first parameter of each
level:
PV >
atvn
>
ptol
>
fva1
>
type
>
pass
> PV …
To enter a particular level, simply release the “P” key when the first
parameter in that level is displayed. To walk through the parameters
in a level, press the “P” key with short strokes. To go back to the
previous parameter in a cycle, press
.
Each parameter is displayed with its prompt in the upper display and
value/condition in the lower display. Depending on the level of
parameter protection adopted, the parameter PASS precedes the
first parameter in the level where the protection becomes active. See
section CONFIGURATION PROTECTION.
DESCRIPTION OF THE PARAMETERS
OPERATION CYCLE
PV + SP PV indication. The measured temperature value (PV)
is shown on the upper display (red). Control Setpoint
(SP) value is shown on the lower display (green).
(trl
Control Mode:
avto
- in automatic mode.
Man
- in manual mode.
PV + MV MV Value -
The upper display shows PV value and
the lower display shows the percentage
of MV
applied to the control output.
In automatic control mode, the MV value is showed
visually only. In manual control mode, the MV value
may be changed by the user. To differ this screen
from SP screen, the MV value blinks constantly.
E pr
Enable Program
Selects the ramp and soak profile
program to be executed.
no
- the program is not executed
yes
- the program is executed
With enabled outputs (
RvN
=
YES
), the program
starts right after the program is selected.
rvn
RUN Function. Enables control outputs and alarms.
YES
- Outputs enables.
NO
- Outputs not enabled.
TUNING CYCLE
Atvn
Auto-Tune: Enables the auto-tuning function for the
PID parameters (
pb
,
ir
,
dt
).
Refer PID Parameters
Determination chapter in this manual and on website
www.novusautomation.com for further details.
0ff
- Turned off. (no PID tuning)
Fast
- Execute the tuning in fast mode.
full
- Execute the tuning in accurate mode.
PB
Proportional Band -
Value of the term P of the
control mode PID, in percentage of the maximum span
of the input type. Adjust of between 0 and 500.0 %.
When set to zero (0), control action is ON/OFF.
ir
Integral Rate - Value of the term Iof the PID
algorithm, in repetitions per minute (Reset).
Adjustable between 0 and 99.99. Displayed only if
proportional band ≠0.
dt
Derivative Time
- Value of the term
D
of the control
mode PID, in seconds. Adjustable between 0 and 300.0
seconds. Displayed only if proportional band ≠0.
(t
Cycle Time
-
Value in seconds in the PWM cycle
period of PID control. Adjustable between 0.5 and
100.0 seconds. Displayed only if proportional band ≠0.
kyst
Control Hysteresis
-
Is the hysteresis for ON/OFF
control (set in temperature units). This parameter is
only used when the controller is in ON/OFF mode
(Pb=0).
A(t
Action Control:
re
Control with Reverse Action
. Appropriate for
heating. Turns
control output on when PV is
below SP.
dir
Control with Direct Action
. Appropriate for
cooling. Turns
control output on when PV
is above SP.
sfst
SoftStart Function
–
Time interval, in seconds, in
which the control limits the speed of increase of the
control output (MV). From 0 to 9999 s.
Zero value ( 0 ) disables the SoftStart function.
Displayed only if proportional band ≠0.
0vt1
0vt2
0vt3
Assign functions to the
output channels OUT1, OUT2
and OUT3:
Off
Not used.
(trl
Control output.
A1
Alarm 1 output.
A2
Alarm 2 output.
Lbd
Loop Break Detect Alarm.
0vt4
Operation mode of OUT4 output channel:
Off
Not used.
(trl
Digital control output (0 or 20 mA)
A1
Alarm output 1.(0 or 20 mA)
A2
Alarm output 2.(0 or 20 mA)
Lbd
Acts as the output for LB function
(.020
Analogical Control Output 0-20 mA
(.420
Analogical Control Output 4-20 mA
p.020
PV Retransmission 0-20 mA
p.420
PV Retransmission 4-20 mA
s.020
SP Retransmission 0-20 mA
s.420
PV Retransmission 4-20 mA

N2020 Controller
NOVUS AUTOMATION 5/7
PROGRAMS CYCLE
Ptol
Program Tolerance - Maximum admitted deviation of
PV with respect to SP. If exceeded, the program
execution is suspended (the internal timer freezes) until
the deviation be returns back within the defined
tolerance.
The value 0 (zero) disables the function.
Psp0
Psp9
Program SP’s, 0 to 9: Group of 10 values of SP that
define the Ramp and Soak profile segments.
Pt1
Pt9
Program Time - Time intervals of program
segments. Defines the time of duration, in minutes,
of each 9 program segments. Configurable between 0
and 9999 minutes.
Pe1
Pe9
Program event - Program Segment Alarm.
Parameters that define which alarms are to be
activated during the execution of a certain program
segment:
OFF Do not start the alarm in this segment.
A1
Start alarm 1 when the program reaches
this segment.
A2
Start alarm 2 when the program reaches
this segment.
A1A2 Start alarm 1 and 2 when the program
reaches this segment.
The alarms chosen must have its function configured
as “
rS
”.
rPt.P
Repeat Program -
Determines the number of times
which one program must be REPEATED besides the
first execution. Configurable between 0and 9999
times. After the last execution, all controller outputs
are turned off ((RUN=OFF).
ALARMS CYCLE
Fva1
Fva2
Function Alarm. Defines the functions for the alarms
among the options of the Table 02.
Sp.a1
Sp.a2
Alarm SP
: Value that defines the alarms actuation
point. For alarms programmed with functions of
Differential type, these parameters define deviations.
bla1
bla2
Blocking Alarm.
YES
Enables initial blocking.
NO
Inhibits initial blocking.
xya1
xya2
Alarm Hysteresis
. Defines the difference between the
value of PV at which the alarm is triggered and the
value at which it is turned off (in engineering units).
Flsh
Flash. Allows visual signalization of an alarm
occurrence by flashing the indication of PV in the
operation level.
YES
Enables the alarm signalization blinking PV.
NO
Disable the alarm signalization blinking PV.
INPUT CYCLE
Type
Input Type
. Selects the input signal type to be
connected to the process variable input. Refer to
Table 01.
fltr
Digital Input Filter. Used to improve the stability of
the measured signal (PV). Adjustable between 0 and
20. In 0 (zero) it means filter turned off and 20 means
maximum filter. The higher the filter value, the slower
is the response of the measured value.
Dp.po
Decimal Point. Determines the presentation of the
decimal point.
vnit
Unit. Defines the temperature unit to be used:
(
Indication in Celsius.
f
Indication in Fahrenheit.
0ffs
Offset. Parameter that allows the user to correct the
PV value indicated.
Spll
SP Low Limit. Defines the SP lower limit. To 0-50
mV input type sets the lower range for SP and PV
indication.
Spxl
SP High Limit. Defines the SP upper limit.
1e.ov
Percentage value to be applied to the output when a
failure in the sensor connected to the controller input
occurs.
Lbd.t
Time interval for the LBD function. Defines the
maximum interval of time for the PV to react to a
control command. In minutes.
f.en
F Enable. Enables the utilization of F key to execute
the RUN function.
YES
Enables F key to execute the RUN function.
NO
Disables it.
m.en
M Enable. Enables the utilization of key to change
the control mode to Automatic or Manual.
YES
key enabled.
NO
key disable.
CALIBRATION CYCLE
All types of input are calibrated in the factory. If a new
calibration is required, it should be performed by a skilled
professional. If this cycle is accessed accidentally, do not
change its parameters.
pass
Password
.
This parameter is presented before the
protected cycles. See item Protection of Configuration.
(alib
Calibration. It enables the calibration possibility of
the controller. When are disabled, the related
parameters calibration are hidden.
inL(
Input Low Calibration
.
Enter the value
corresponding to the low scale signal applied to the
analog input.
ink(
Input High Calibration
.
Enter the value
corresponding to the full scale signal applied to the
analog input.
0vL(
Output Low Calibration. Analog output calibration.
Introduction of lower value present in the analog
output.
0vk(
Output High Calibration. Analogic output
calibration. Introduction of higher value present in the
analog output.
rstr
Restore. Restores the factory calibration for all inputs
and outputs, disregarding modifications carried out by
the user.
(j
Cold Junction
.
Temperature of controller cold
junction.
Pas.(
Password Change. Allows defining a new access
password, always different from zero.
Prot
Protection. Sets up the Level of Protection. See
Table 03.

N2020 Controller
NOVUS AUTOMATION 6/7
CONFIGURATION PROTECTION
The controller provides means for protecting the parameters
configurations, not allowing modifications to the parameters values,
avoiding tampering or improper manipulation. The parameter
Protection (
PROt
), in the Calibration level, determines the
protection strategy, limiting the access to particular levels, as shown
by the below.
Protection Level Protection Levels
1 Only the Calibration level is protected.
2 Calibration and Input levels are protected.
3
Alarms, Input and Calibration levels are
protected.
4 Program, Alarms, Input and Calibration levels
are protected.
5
Tuning, Program, Alarms, Input and
Calibration levels are protected.
6 All levels are protected, but the SP screen in
the Operation level.
7 All levels are protected, including SP.
Table 03– Levels of Protection for the Configuration
ACESS PASSWORD
The protected levels, when accessed, request the user to provide the
Access Password for granting permission to change the
configuration of the parameters on these levels. The prompt
PASS
precedes the parameters on the protected levels. If no password is
entered, the parameters of the protected levels can only be
visualized.
The Access Password is defined by the user in the parameter
Password Change (
PAS.(
), present in the Calibration Level. The
factory default for the password code is 1111.
PROTECTION ACCESS PASSWORD
The controller foresees a safety system which helps to avoid the
input of many passwords, trying to insert the correct one. Once 5
consecutive invalid passwords are inserted, the controller stops to
accept passwords for 10 minutes.
MASTER PASSWORD
The Master Password is intended for allowing the user to define a
new password in the event of it being forgotten. The Master
Password doesn’t grant access to all parameters, only to the
Password Change parameter (
PAS(
). After defining the new
password, the protected parameters may be accessed (and
modified) using this new password.
The master password is made up by the last three digits of the serial
number of the controller added to the number 9000.
As an example, for the equipment with serial number 07154321, the
master password is 9 3 2 1.
Controller serial number is displayed by pressing
for 5 seconds.
DETERMINATION OF PID PARAMETERS
Automatic tuning allows the controller to obtain P.I.D parameters
(proportional band, full rate, derivative time).
During the process of determining automatically the PID parameters,
the system is controlled in ON/OFF in the programmed Setpoint. The
auto-tuning process may take several minutes to be completed,
depending on the system. The steps for executing the PID auto-
tuning are:
- Turn-off the outputs (RUN= NO).
- Adjust the SP value desired for the process.
- Enable auto-tuning at the parameter (ATUN= FAST or FULL)
- Turn-on the outputs (RUN= YES).
The option
FAST
performs the tuning in the minimum possible time,
while the option
FULL
gives priority to accuracy over the speed.
The sign TUNE remains lit during the whole tuning phase. The user
must wait for the tuning to be completed before using the controller.
During the automatic tuning execution, PV oscillations may be
induced in the process around the setpoint.
If the tuning does not result in a satisfactory control, refer to Table 04
for guidelines on how to correct the behavior of the process.
PARAMETER VERIFIED PROBLEM SOLUTION
Proportional Band Slow answer Decrease
Great oscillation Increase
Rate Integration Slow answer Increase
Great oscillation Decrease
Derivative Time Slow answer or instability Decrease
Great oscillation Increase
Table 04- Guidance for manual adjustment of the PID parameters
For further details on PID tuning, visit our web site:
www.novusautomation.com.
MAINTENANCE
PROBLEMS WITH THE CONTROLLER
Connection errors and inadequate programming are the most
common errors found during the controller operation. A final revision
may avoid loss of time and damages.
The controller displays some messages to help the user identify
problems.
MESSAGE DESCRIPTION OF THE PROBLEM
----
Open input. No sensor or signal.
Err1
Err6
Connection and/or configuration problems. Check
the wiring and the configuration.
Other errors messages showed by the controller represent internal
damages which implies necessarily in the submission of the
equipment for maintenance.
CALIBRATION OF THE INPUT
Visit our web site for further information www.novusautomation.com.
IDENTIFICATION
N2020 - PRR Basic version. Three outputs.
OUT1= pulse / OUT2= relay / OUT3= relay
N2020 - PRRA For outputs.
OUT1= pulse / OUT2= relay / OUT3= relay
OUT4= Analogic output 0-20 / 4-20 mA

N2020 Controller
NOVUS AUTOMATION 7/7
SPECIFICATIONS
DIMENSIONS:.................................................48 x 96 x 92 mm (1/8 DIN)
Approximate:......................................................................... 180 g
POWER SUPPLY:.........................100 to 240 Vac (± 10 %), 50/60 Hz
...................................................................48 to 240 Vdc (±10 %)
Maximum consumption:......................................................... 6 VA
ENVIRONMENTAL CONDITIONS:
Operation Temperature: ............................................... 0 to 50 °C
Relative Humidity:................................................... 80 % @ 30 °C
For temperatures above 30 °C, reduce 3 % for each °C
Internal use; Category of installation II, Degree pollution 2;
altitude < 2000 meters
INPUT.......... Thermocouples J; K; Tand Pt100 (according Table 01)
Internal Resolution:...................................... 32767 levels (15 bits)
Resolution of Display:............ 12000 levels (de -1999 up to 9999)
Rate of input reading: .........................................up 20 per second
Accuracy: ..(*) Thermocouples J, K, T: 0.25 % of the span ±1 °C
................................................................Pt100: 0.2 % of the span
Input Impedance:..................Pt100 and thermocouples: > 10 MΩ
Measurement of Pt100: ......................... 3-wire type, (α=0.00385)
With compensation for cable length, excitation current of
0.170 mA.
OUT1: .........................................................Voltage pulse, 5 V / 25 mA
OUT2: .....................Relay SPST; 1.5 A (Resistive) / 240 Vac / 30 Vdc
OUT3: .....................Relay SPST; 1.5 A (Resistive) / 240 Vac / 30 Vdc
OUT4: ............................. 0-20 / 4-20 mA / 500 Ωmax. / 12.000 levels
FRONT PANEL:......................... IP65, Polycarbonate (PC) UL94 V-2
ENCLOSURE: .............................................. IP30, ABS+PC UL94 V-0
ELECTROMAGNETIC COMPATIBILITY:............... EN 61326-1:1997
and EN 61326-1/A1:1998
SAFETY: .......................... EN61010-1:1993 and EN61010-1/A2:1995
SPECIFIC CONNECTIONS FOR TYPE FORK TERMINALS 6.3 MM;
PROGRAMABLE CICLO OF PWM OF 0.5 UP 100 SECONDS;
STARTS UP OPERATION AFTER 3 SECONDS CONNECTED TO
THE POWER SUPPLY.
(*) When a thermocouple is used as a temperature sensor, 15-minutes
minimum time for terminal accommodations shall be observed.
SAFETY INFORMATION
Any control system design should take into account that any part of the
system has the potential to fail. This product is not a protection or
safety device and its alarms are not intended to protect against product
failures. Independent safety devices should be always provided if
personnel or property are at risk.
Product performance and specifications may be affected by its
environment and installation. It’s user’s responsibility to assure
proper grounding, shielding, cable routing and electrical noise
filtering, in accordance with local regulations, EMC standards and
good installation practices.
SUPPORT AND MAINTENANCE
This product contains no serviceable parts inside. Contact our local
distributor in case you need authorized service. For troubleshooting,
visit our FAQ at www.novusautomation.com.
LIMITED WARRANTY AND LIMITATION OF
LIABILITY
NOVUS warrants to the original purchaser that this product is free from
defects in material and workmanship under normal use and service
within one (1) year from the date of shipment from factory or from its
official sales channel to the original purchaser.
NOVUS liability under this warranty shall not in any case exceed the
cost of correcting defects in the product or of supplying replacement
product as herein provided and upon the expiration of the warranty
period all such liability shall terminate.
For complete information on warranty and liability limitations, check
appropriate section in our web site: www.novusautomation.com.