Novus N1500 User manual

NOVUS AUTOMATION 1/8
Digital Panel Meter
N1500
DIGITAL PANEL METER
– USER MANUAL – V2.3x P
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:
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.
PRESENTATION
N1500 is a digital panel meter which accepts a large variety of input
signals and sensors. A six-digit LED display shows measured value
and all programming parameters.
Instrument configuration is achieved from the keypad, without any
hardware change. Thus, the selection of input type and alarms
modes, besides other special functions, are accessed and defined
from the frontal keypad.
The user should read this manual thoroughly before using the
instrument. It must be handled with care and should be used
accordingly for best results.
Some of the features are:
•Universal input: Pt100, thermocouples, 0-50 mV, 0-5 V, 0-10 V, 0-
20 mA and 4-20 mA.
•Customized indications.
•24 Vdc power supply for remote transmitter excitation.
•Memory for maximum and minimum values.
•Hold and Peak Hold functions.
•Digital input.
•Increasing or decreasing display.
•Process Variable (PV) retransmission in 0-20 mA or 4-20 mA
(optional).
•RS485 MODBUS RTU serial communication (optional).
•3rd and 4th alarm relays (optional).
PROCESS VARIABLE INPUT (PV)
The process variable (PV) input type is configured through the frontal
keypad according to the codes shown in Table 1 (refer to INPUT
TYPE parameter (in.typ) in CONFIGURATION LEVEL).
All input types are factory calibrated and no additional calibration is
required. The user does not need to make any adjustments.
TYPE CODE MEASURING RANGE
J
Tc j
Range: -130 to 940 °C (-202 to 1724 °F)
K
Tc h
Range: -200 to 1370 °C (-328 to 2498 °F)
T
Tc t
Range: -200 to 400 °C (-328 to 752 °F)
E
Tc e
Range: -100 to 720 °C (-148 to 1328 °F)
N
Tc m
Range: -200 to 1300 °C (-328 to 2372 °F)
R
Tc r
Range: 0 to 1760 °C (32 to 3200 °F)
S
Tc s
Range: 0 to 1760 °C (32 to 3200 °F)
B
Tc b
Range: 500 to 1800 °C (932 to 3272 °F)
Pt100
Pt100
Range: -200.0 to 850.0 °C (-328.0 to 1562.0 °F)
0 – 50 mV
Linear
0-50
Linear. Programmable indication.
0 – 5 V
Linear
0-5
Linear. Programmable indication.
0-10 V
Linear
0-10
Linear. Programmable indication.
0 – 50 mV
No Linear
c.0-50
Custom linearization, user configurable.
0 – 5 V
No Linear
c.0-5
Custom linearization, user configurable.
0-10 V
No Linear
c.0-10
Custom linearization, user configurable.
4-20 mA
NO
LINEAR
Lin J
T/C type J linearization. Range: -130 to 940 °C
Lin h
T/C type K linearization. Range: -200 to 1370 °C
Lin t
T/C type T linearization. Range: -200 to 400 °C
Lin e
T/C type E linearization. Range: -100 to 720 °C
Lin m
T/C type N linearization. Range: -200 to 1300 °C
Lin r
T/C type R linearization. Range: 0 to 1760 °C
Lin s
T/C type S linearization. Range: 0 to 1760 °C
Lin b
T/C type B linearization. Range: 500 to 1800 °C
Linpt
Pt100 linearization. Range:-200.0 to 850.0 °C
0-20 mA
Linear
0-20A
Linear. Programmable indication.
4-20 mA
Linear
4-20A
Linear. Programmable indication.
0-20 mA
No Linear
c.0-20
Custom Linearization, user configurable.
4-20 mA
No Linear
c.4-20
Custom Linearization, user configurable.
Table 1 –Input types

N1500 Digital Panel Meter
NOVUS AUTOMATION 2/8
ALARMS
The digital panel meter has 2 alarm outputs in the basic version and
up to 4 alarms outputs optionally.
Each alarm has a corresponding LED message in the front panel to
show alarm status.
ALARM FUNCTIONS
The alarms can be set to operate in seven different modes. These
modes are shown in Table 2 and described below. The alarm can
also be set as ‘disabled’.
•Break alarm - Ierr
The break alarm is triggered whenever the input sensor breaks or is
badly connected.
•Low alarm - Lo
The alarm relay is triggered whenever the measured value is below
the alarm set point.
•High alarm - Ki
The alarm relay is triggered whenever the measured value is above
the alarm set point.
•Differential low – Dif.lo
Deviation alarm. Alarm relay is triggered whenever the difference
(deviation) between the Process Variable and the reference value
(AlrEF) is lower than the values defined in SP.AL. For this function,
the triggering point is defined as:
(ALrEF – SP.AL)
•Differential High – Dif.ki
Deviation alarm. Alarm relay is triggered when the difference
(deviation) between the Process Variable value and the reference
value (AlrEF) is greater than the value defined in SPAL. For this
function, the triggering point is defined as:
(ALrEF + SP.AL)
•Differential (or Band) out of range – Dif.ov
Deviation alarm. Alarm relay is triggered when the difference
(deviation) between the Process Variable value and the reference
value (AlrEF) has its modulus greater than the value configured in
SPAL. For this function, the triggering point is defined as:
(ALrEF – SP.AL) and (ALrEF + SP.AL)
•Differential (or Band) within range – Dif.In
Deviation alarm. Alarm relay is triggered when the difference
(deviation) between the Process Variable value and the reference
value (AlrEF) has its modulus lower than the value defined in
SPAL. For this function, the triggering points are defined as:
(ALrEF – SP.AL) and (ALrEF + SP.AL)
TYPE PROMPT ACTION
Disabled
Off
Alarm is inactive
Break Alarm
(input Error)
Ierr
Alarm will go ON if sensor breaks
Low Alarm
(Low)
Lo
Alarm SP
PV
High Alarm
(High)
Ki
Alarm SP
PV
Differential Low
(differential Low)
Dif.lo
PV
AL SP + Deviation
AL SP
Differential High
(differential High)
Dif.ki
PV
AL SP + Deviation
AL SP
TYPE PROMPT ACTION
Differential out of
range
(differential out)
Dif.ov
PV
AL SP + Deviation
Positive Deviation
AL SP
AL SP - Deviation
Differential within
range
(differential
Within)
Dif.In
PV
AL SP + Deviation
Negative Deviation
AL SP
AL SP - Deviat.
Table 2 –Alarm functions
ALARM TIMER
The alarms can be configured to perform timing functions. The
configuration allows the alarm output to be delayed, or to deliver a
single pulse or a train of pulses. The delay, the pulse width and the
period are defined by the user.
Table 3 shows these advanced functions. Times T1 and T2 can be
programmed from 0 to 6500 seconds and are define during
configuration (see ALARM LEVEL section). Programming 0 (zero) in
the timer parameters T1 and T2 disables the timer function.
The leds associated with the alarm always light up when the alarm
condition occurs, regardless of the current state of the output relay,
which may be de-energized momentarily due to a time delay.
ADVANCED
FUNCTION T1 T2 ACTION
Normal
Operation 0 0
Alarm Event
Alarm
Output
Delayed 0 1 s to
6500 s
Alarm Event
Alarm
Output
T2
Pulse 1 s to
6500 s 0
Alarm Event
Alarm
Output
T1
Oscillator 1 s to
6500 s
1 s to
6500 s
Alarm Event
Alarm
Output
T1
T2
T1
Table 3 –Timer alarm functions
ALARM INITIAL BLOCKING
The Initial Blocking option inhibits the alarm from being recognized
if an alarm condition is present when the controller is first energized.
The alarm will be triggered only after the occurrence of a non alarm
condition followed by a new occurrence for the alarm.
The Initial Blocking is disabled for the Break Alarm function.

N1500 Digital Panel Meter
NOVUS AUTOMATION 3/8
SPECIAL FUNCTIONS
MAXIMUM AND MINIMUM
The digital panel meter memorizes the measured maximum and
minimum values (peak and valley). These two values are shown
when pressing the MAX or MIN keys.
Pressing both keys simultaneously will clear the memory for a new
peak and valley detection.
SPECIAL FUNCTION KEY AND DIGITAL INPUT
The key (special function key) in the frontal panel and the
optional digital input can execute special functions according to the
user selection. Figure 8 shows how to activate the digital input. The
special functions for the key and for the digital input are
explained as it follows.
•Kold – Freeze measured value
The Hold function freezes the measured value showed in the
display. This function is toggled each time the key is pressed, or
the digital input is selected.
Whenever the digital panel meter is in the Hold mode a koLd
message is briefly displayed to show the operator that the displayed
value is the frozen value and not the current input reading.
•Pkold – Maximum value
The Peak Hold function shows the maximum value measured since
the last time the key was pressed, or the digital input activated.
Each activation of the key or digital input triggers a new Peak
Hold level and the display resets with a new peak value.
•rSt– Clears maximum and minimum
This function works the same way as the MAX and MIN keys
pressed simultaneously, as explained in the MAXIMUM AND
MINIMUM section.
If this rStfunction is programmed, every touch of the key or
activation of the digital input will clear the memory and a new level of
maximum and minimum values memorization will start.
PROCESS VARIABLE RETRANSMISSION
As an option, the digital panel meter can be supplied with an isolated
0-20 mA or 4-20 mA analog output for Process Variable (PV)
retransmission. Available at the back panel terminals 29 and 30.
When this option is available, retransmission will be always active, so
that the user will not be required to turn it on or off.
The PV values that define the scale of the 0 mA / 4 mA to 20 mA
retransmission can be programmed by the user in the high and low
output limits (0v.lol and 0v.kil), at configuration level. High and
low limits can be freely programmed, even with a low limit higher
than high limit, resulting in a reversed retransmission signal
(decreasing signal when PV increases).
For a voltage output signal, an external shunt (calibrated resistor)
should be installed at the analog output terminals.
AUXILIARY 24 VDC POWER SUPPLY – AUXILIARY P.S.
The digital panel meter provides a voltage power supply of 24 Vdc to
excite field transmitters with 25 mA current maximum capacity.
Available at the back panel terminals 16 and 17.
CUSTOMIZED LINEARIZATION
Three types of signals can be user-customized to fit a linearization
profile. This means that the operator can configure the instrument to
read non-standard crescent non-linear signals with high accuracy.
INSTALLATION
The digital panel meter is designed to be panel mounted. Remove the
two plastic fixing clamps from the instrument, insert the unit into the
panel cut-out and slide firmly the fixing clamps from the rear against the
panel.
INSTALLATION RECOMMENDATIONS
•Input signal wires should be laid out away from power lines and
preferably inside grounded conduits.
•Instrument mains (line) supply should be suitable for this purpose
and should not be shared.
•In controlling and monitoring applications, consequences of any
system failure must be considered in advance. The internal alarm
relay does not warrant total protection.
•Use of RC filters (47 R and 100 nF, serial) are highly
recommended when driving solenoids, contactor coils or other
inductive loads.
ELECTRICAL CONNECTIONS
The internal electronics can be removed from the front panel without
any cable disassembly. The input signals and power connections are
shown in Figure 1.
Figure 1 –Back panel terminals
POWER CONNECTION
Figure 2 –Power Connection

N1500 Digital Panel Meter
NOVUS AUTOMATION 4/8
SENSOR AND INPUT SIGNAL CONNECTIONS
These connections should be properly done, and terminals must be
well tightened. Thermocouples must be installed with proper
extension or compensation cables.
Pt100 RTDs must be 3-wire connected and the wires connected to
terminals 22 and 23 should have the same electrical resistance
(same wire gauge) for correct cable length compensation. Four-wire
RTDs can be connected by disconnecting the fourth wire. Two-wire
RTDs can be connected by shortening terminals 22 and 23 and
connecting the Pt100 to terminals 23 and 24.
The figures below show the connections relative to each type of input.
Figure 3 –Thermocouple
input
Figure 4 –3-wire Pt100
input
Figure 5 –Voltage input Figure 6 –Current input
Figure 7 –Connection for
0-5 V or 0-10 V Figure 8 –Digital Input
Figure 9 shows the connections for a 4-20 mA transmitter powered
by the 24 V power supply of the digital panel meter.
Figure 9 –2-wire transmitter with internal power supply
DIGITAL INPUT (DIG IN)
The digital input is activated by connecting a switch (or equivalent) to
its terminals, as shown in Fig. 8 above.
ANALOG OUTPUT
The N1500 can deliver either 0-20 mA or 4-20 mA analog output,
depending on how the instrument is configured. The output is
available at terminals 29 and 30.
OPERATION
The front panel is shown below:
Figure 10 –Front panel identification
Status Display: Shows the process variable (PV) and the
programming prompts.
Indicators A1, A2, A3, and A4: Show active alarms.
Indicators Rx and Tx: Indicate RS485 communication line is active.
PROGRAM key: This key is used to access different
displays with the programmable parameters of the device.
BACK key: This key is used to go back to the previous
parameter displayed in the menu level.
UP / MAX and DOWN / MIN key: These keys are used
to increase and decrease parameters values. These keys
are also used to display maximum and minimum values
stored in memory.
FUNCTION key:This special function key is used for pre-
programmed functions as explained in the special function key
section of this manual.
The digital panel meter requires that the internal parameters be
properly configured such as to fit the application need. These
parameters are the input type (T/C, Pt100, 4-20 mA, etc), alarms
triggering points, alarm functions, etc.
These parameters are divided in five levels (or groups) of parameters
which we will refer to as LEVELS.
LEVEL ACCESS
1 −Work
Free access
2 −Alarms
Reserved access
3 −Functions
4 −Configuration
5 −Customized Linearization
6 −Calibration
Table 4 –Parameters levels
The work level has free access. All other levels require a certain
combination of keystrokes to be accessed. The combination is:
and keys pressed simultaneously
Once within a level, just press to move to the subsequent
parameters of this level. At the end of each level the display will go
back to the work level.
Note: To access the calibration level, however, it is required to press
the keys and simultaneously for 10 seconds. The first
parameter in this level is presented (In.LoC) indicating that the
calibration level is enabled.
After reaching the intended prompt just press the or keys to
change this parameter accordingly. All changes are recorded in non-
volatile memory as we move to next prompt. After 25 seconds with no
key pressed the digital panel meter will return to the measuring level
(work level).

N1500 Digital Panel Meter
NOVUS AUTOMATION 5/8
CONFIGURATION PROTECTION
As safety measure, parameter changes can be prevented by a
combination of keys, valid for each level. The protected parameters
can be inspected but not modified.
To protect a level, press the and keys simultaneously for 3
seconds while in the level. To unlock the level, press and
for 3 seconds.
The display will briefly flash confirming that the level was
successfully locked or unlocked.
For further protection, the keypad unlock operation can be disabled
by changing the position of an internal strap inside the digital panel
meter:
When PROT is OFF, the user is allowed to lock and unlock the levels
using the keypad as explained above. If PROT is ON, the levels
lock/unlock operation is disabled.
Note: It is recommended to disable/suspend the control whenever it
is necessary to change the device settings.
PROGRAMMING THE DIGITAL PANEL METER
WORK LEVEL
This is the first level. At power up the digital panel meter will display
the Process Variable (PV). The alarm triggering points are also
displayed at this level (alarm Setpoints).
To advance in this level simply press .
SCREEN PROMPT PARAMETER DESCRIPTION
8.8.8.8.8.
PV measurement
. Shows the measured variable.
For Pt100 or thermocouples the display will show the
absolute temperature value.
For 0-50 mV, 0-5 V, 0-10 V, 0-20 mA and 4-20 mA
inputs the display shows the values defined in the
in.LoL
and
in.kiL
parameters.
With the hold function programmed the display
shows the frozen variable and alternates with the
message
koLd
.
Likewise, with Peak Hold function programmed the
high limit is displayed with the
P.koLd
prompt
alternately.
Should any fault situation occur the digital panel
meter will display an error message which can be
identified at the PROBLEMS WITH THE DIGITAL
PANEL METER section of this manual.
Al.ref
Differential Alarm Reference Value.This prompt is
shown only when there is an alarm programmed with
differential function. T
his value is used as a
reference for differential alarms triggering.
Sp.al1
Sp.al2
Sp.al3
Sp.al4
Alarms Setpoints 1, 2, 3 and 4.
Defines the
operation point of each alarm programmed with
Lo
or
ki
functions.
When an alarm is programmed with a differential
function, the alarm setpoint value represents the
deviation value of the alarm relative to the reference
Al.ref
.
ALARM LEVEL
fV.al1
fV.al2
fV.al3
fV.al4
Alarm Function - Defines functions for the alarms 1,
2, 3 and 4, configured in ALARM FUNCTIONS
section.
oFF
Alarm off
iErr
Broken or Shorted Sensor
Lo
Low value
ki
High value
DiF.Lo
Differential low
DiF.Hi
Differential high
DiF.ov
Differential outside the range
DiF.in
Differential within range.
Ky.al1
Ky.al2
Ky.al3
ky.al4
Alarm Hysteresis. This is the difference from the
measured value to the point where the alarm is
turned ON and OFF.
Bl.al1
Bl.al2
Bl.al3
bl.al4
Alarm Blocking. Should any alarm condition occur,
the alarms can be ind
ividually disabled when
energizing the digital panel meter.
Al1t1
Al1t2
Al2t1
Al2t2
Al3t1
Al3t2
Al4t1
Al4t2
Alarm Timer. The user can set delayed, momentary,
or sequential alarms by configuring times T1 and T2
according to Table 3.
To disable this function just set zero for T1 and T2.
FUNCTION LEVEL
f.fvnc
KEY FUNCTION.
Defines functions for the
key. The available options are:
oFF
Key not used.
kold
Hold PV.
RSt
Resets Peak and Valley (MAX and values).
P.koL
Peak Hold.
These functions are described in
detail in the
SPECIAL FUNCTION KEY AND DIGITAL INPUT
section.
Dig.in
Digital Input Function.Defines the function for the
digital input. The available functions are the same as
for key:
oFF
-
kold
-
rSt
-
PkoLd
These functions are described in detail in the
SPECIAL FUNCTION KEY AND DIGITAL INPUT
section.
filtr
Input Digital Filter.Adjustable from 0 to 60, this is
used to reduce instability of the measured value.
0 means the filter is off and 60 means maximum
filtering. The higher the filter value, the slower the
response.
ofset
Display Offset. This a value which is added to the
PV to offset any measurement deviation or sensor
error. The offset is shown in the programmed
engineering unit. For °F measurements the null
reference is at 32 °F.
bavd
Baud Rate.Serial digital communication speed in
kbps. Programmable:
1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 115.2 (no parity).
1.2P, 2.4P, 4.8P, 9.6P, 19.2P, 38.4P, 57.6P and
115.2P (with EVEN parity).
Adres
Communication Address. A number that identifies
the instrument in a multidrop network.

N1500 Digital Panel Meter
NOVUS AUTOMATION 6/8
CONFIGURATION LEVEL
In.typ
Input type. Selects the input signal or sensor type to
be connected to the PV terminals. Refer to Table 1 for
options.
Changing the input type causes all other parameters
related to PV and alarms to be changed as well,
therefore, this parameter shall be the first to be set.
Dp.pos
Decimal point position. Defines the decimal point
position in the displayed value.
It is displayed when linear input types 0-50 mV, 0-5
V, 0-10 V, 0-20 mA or 4-20 mA are selected at the
in.tYP
prompt.
UnIt
Temperature unit.Selects °C or °F indication.
This prompt is not shown for input types 0-50 mV, 0-5
V, 0-10 V, 0-20 mA or 4-20 mA are selected at the
in.tYP
prompt.
s.root
Square root. This prompt is only shown when input
types 0-50 mV, 0-5 V, 0-10 V, 0-20 mA or 4-20 mA
are selected at the
in.tYP
prompt.
Set
YES
and the square root will be applied to the
measure
d value within the limits programmed in
in.LoL
and
in.kiL
.
The display will show the low limit (
in.LoL
) value
should the input signal be below 1 % of the range.
Scale
Scale. Defines the indication range for linear inputs
(0-50 mV, 0-5 V, 0-10 V, 0-20 mA and 4-20 mA).
0
Configurable indication from –
31000 to +
31000.
1
Configurable indication from 0 to + 60000.
2
Configurable indication from 0 to +120000. Only
even values will be displayed (resolution is not
improved).
The selected scale affects value
s of PV, alarm
setpoints and Offset.
In.lol
Input low limit. Sets the low limit for input type 0-50
mV, 0-5 V, 0-10 V, 0-20 mA or 4-20 mA.
The range created may have increasing or
decreasing behavior in relation to the input signal
behavior.
In.kil
Input high limit. Sets the high limit for input type 0-
50 mV, 0-5 V, 0-10 V, 0-20 mA or 4-20 mA.
The range created
may have increasing or
decreasing behavior in relation to the input signal
behavior.
0vt.ty
Analog output type. Selects the analog output type
to either 0-20 mA or 4-20 mA.
0v.lol
Low limit for analog retransmission. Defines the PV
value that results in a 4 mA (or 0 mA) analog output
current.
0v.kIl
High limit for analog retransmission. Defines the
PV value that results in a 20-mA analog output
current.
Ovt.er
4-20 mA output behavior in case of failures
.
Defines the output as 4-20 mA when there is an error
in the indication.
Do
Applies a value < 4 mA.
UP
Applies a value > 20 mA
CUSTOMIZED LINEARIZATION LEVEL
Inp.01
Inp.30
Defines the initial and end analog input values for
each custom segment line. The values
must be
entered in the input signal unit:
0-50 mV, 0-5 V, 0-10 V, 0-20 mA or 4-20 mA. For 0-
10 V, select 0-5 V.
Ovt.01
ovt.30
Defines the corresponding indication that each
custom segment is to show.
Values are expressed in the desired indication unit
(within the Indication Lower and Upper Limits).
Table 5 shows the sequence of levels and parameters presented in the display. There are parameters that must be defined for each alarm
available.
WORK LEVEL ALARM LEVEL FUNCTION LEVEL CONFIGURATION LEVEL CUSTOMIZED LINEARIZATION LEVEL CALIBRATION LEVEL
8.8.8.8.8.
*Fv.al1
f.fvn(
In.typ
Inp.01 -inp.30
In.lo(
Al.ref
*Df.al1
Dig.in
Dp.pos
OVt.01 - ovt.30
In.ki(
*
Sp.al1
*
Ky.al1
Filtr
UnIt
Ov.lo(
*Bl.al1
Ofset
Sroot
Ov.ki(
*Al.1t1
Bavd
Scale
(j lo
*Al.1t2
adres
In.lol
k.type
In.kil
0vt.ty
0v.lol
0v.kil
OVT.er
Table 5 –Sequence of levels and parameters displayed by the digital panel meter
*Parameters that require definition for each available alarm.

N1500 Digital Panel Meter
NOVUS AUTOMATION 7/8
CALIBRATION LEVEL
All input and output types are factory calibrated. This level
should only be accessed by experienced personnel. If this level
is accidentally accessed do not touch the or keys, just
press the key a few times to go back to the Work Level.
In.lo(
Input low calibration.Sets the Process Variable
low calibration (offset).
Several keystrokes at or
might be
necessary to increment one digit.
In.ki(
Input high calibration.Sets the Process Variable
span calibration (gain).
Ov.lo(
Analog output low calibration. Sets the analog
current output low calibration (offset).
Ov.Ki(
Analog output span calibration. Sets the analog
current output high calibration (span) of the analog
output (20 mA).
(J lo
Cold Junction calibration
.
Allows the user to
calibrate the cold junction temperature (at the input
terminals) directly in degrees.
k.type
Hardware type. This parameter adapts the firmware
to the actual hardware (optional features) and should
not be changed by the user.
2 Alarms .................................................3
2 Alarms and 4-20 mA .........................19
2 Alarms and RS485 ............................35
2 Alarms, 4-20 mA, and RS485 ...........51
4 Alarms ...............................................15
4 Alarms and 4-20 mA .........................31
4 Alarms and RS485 ............................47
4 Alarms, 4-20 mA, and RS485........... 63
CONFIGURATOR SOFTWARE
Available for free download from the NOVUS website, QuickTune
software is the ideal tool to configure the N1500. It also has
diagnostic tools.
To configure the device, simply follow the procedure below:
1. Download and install the software on the computer to be used.
2. Run QuickTune, set up communication and start device
recognition.
PROBLEMS WITH THE DIGITAL PANEL METER
Connection errors or improper configuration will result in
malfunctioning of the digital panel meter. Carefully revise all cable
connections and programming parameters before operating the unit.
Some error messages will help the user identify potential problems.
MESSAGE POSSIBLE PROBLEM
VVVVV
Measured value is above the value allowed for the
selected sensor or above the configured input
signal limit.
nnnnn
Measured value is below the value allowed for the
selected sensor or below the configured input
signal limit.
-----
Open input. No sensor is connected,
or the
sensor is broken.
Err 1
Pt100 cable resistance is too high, or the sensor
is badly connected.
Figure 11 –Error messages
Different messages other than the ones above should be reported to
the manufacturer. Please inform the serial number if this should
occur. The serial number can be viewed at the display by pressing
the key for about 3 seconds.
The software version of the instrument can be viewed at the time the
unit is powered.
When not properly configured, the instrument may show false error
messages, particularly those related to the type of input selected.
SPECIAL RECOMMENDATIONS
Should the digital panel meter be repaired, some special handling care
should be taken. The device must be withdrawn from the case and
immediately placed in an anti-static wrap; protected from heat and
humidity.
INPUT CALIBRATION
All inputs are factory calibrated and recalibration should only be done
by qualified personnel. If you are not familiar with these procedures
do not attempt to calibrate this instrument.
The calibration steps are:
a) Select the input type to be calibrated.
b) Set the desired upper and lower display limits.
c) At the input terminals inject an electrical signal corresponding to
a known indication value a little higher than the lower display
limit.
d) Select the inLC prompt. Through the and keys adjust
PV so that it matches the injected signal.
e) Inject a signal that corresponds to a value a little lower than the
upper limit of the display.
f) Select the inkC prompt. Through the and keys adjust
PV so that it matches the injected signal.
g) Repeat steps c) to f) until no further adjustment is necessary.
Note: When verifications are proceeded, note if the Pt100
excitation/activation current the calibrator requires is compliant to the
Pt100 excitation current used in this instrument: 0.750 mA.
SERIAL COMMUNICATION
The digital panel meter can be supplied with an asynchronous
RS485 digital communication interface for master-slave connection
to a host computer (master).
The digital panel meter works as a slave only and all commands are
started by the computer which sends a request to the slave address.
The addressed unit processes the command and sends back the
answer.
Broadcast commands (addressed to all units in a multidrop network)
are accepted but no response is generated.
FEATURES
•RS485 compatibility with two-wire bus from the host to up to 31
slaves in a multidrop network topology.
•Up to 247 units can be addressed by the MODBUS RTU protocol.
•Maximum network distance: 1000 m.
•Disconnection time: Maximum of 2 ms after the delivery of the last
byte.
•Communication signals electrically isolated from the rest of the
instrument.
•Baud rate: 1200, 2400, 4800, 9600, 19200, 38400 or 57600 bps.
•Number of data bits: 8, without parity.
•Number of stop bits: 1
•Time to start response transmission: 100 ms maximum delay
after acknowledging the command.
•Protocol: MODBUS (RTU)
Two parameters must be configured to use the serial communication
interface: Communications Baud Rate (bavd) and the
Communication Address (adres).

N1500 Digital Panel Meter
NOVUS AUTOMATION 8/8
RS485 INTERFACE: ELECTRICAL CONNECTION
The RS485 signals are:
D1
D
D +
B Bidirectional data line Terminal 25
D0
D -
A Inverted bidirectional data line Terminal 26
C
Optional connection. Improves
communication performance for
long cable runs.
Terminal 27
REDUCED REGISTERS TABLE FOR SERIAL
COMMUNICATION
COMMUNICATION PROTOCOL
The MOSBUS RTU slave is implemented. All configurable
parameters can be accessed for reading or writing through the
communication port. Broadcast commands are supported as well
(address 0).
The available Modbus commands are:
01 – Read Coils 05 – Write Single Coil
03 - Read Holding Register 06 - Write Single Register
HOLDING REGISTER TABLE
Follows a description of the usual communication registers.
For full documentation, download the Registers Table for Serial
Communication in the N1500 section of our web site:
www.novusautomation.com.
All registers are 16-bit signed integers.
ADDRESS PARAMETER REGISTER DESCRIPTION
0000 PV Read: Process variable.
Write: Not allowed.
Range: The minimum value is in
inlol
. The maximum value is in
inkil
. The
decimal point position
depends on
dppos
.
0003 PV Read: Normalized Process Variable.
Write: Not allowed.
Maximum range: 0 to 120000.
0004 Display
Value
Read: Current display value.
Write: Current display value.
Maximum range: -31000 to 31000.
The range depends on
the showed
display.
Table 6 –Register table
SPECIFICATIONS
DIMENSIONS:........................................... 48 x 96 x 92 mm (1/8 DIN).
....................................................................Approximate weight: 250 g
PANEL CUT-OUT: ....................................45 x 93 mm (+0.5 -0.0 mm)
POWER: ...................................... 100 to 240 Vac/dc ±10 %, 50/60 Hz
Optional 24 V:................... 12 to 24 Vdc / 24 Vac (-10 % / +20 %)
Max. Consumption:............................................................. 7.5 VA
ENVIRONMENTAL CONDITIONS:
Operating temperature: ................................................ 5 to 50 °C
Maximum RH:..........................................................80 % up to 30 °C
..................... For temperatures above 30 °C, decrease 3 % per °C
....................................... Installation category II, pollution degree 2,
altitude < 2000 m
INPUT....................Keyboard selection of input type (refer to Table 1)
Internal resolution: ................................................ 128000 levels
Display resolution:
Temperature: ........................................................................ 1 / 0.1
Other measures................................ 1 / 0.1 / 0.01 / 0.001 / 0.0001
Input sample rate:.............................5 per second for Pt100 and T/C
.................15 per second to 0-50 mV, 4-20 mA, 0-5 V and 0-10 V
Accuracy: .......Thermocouples J, K, T, N: 0.25 % of span ±1 °C
...........................Thermocouple E, R, S, B: 0.25 % of span ±3 °C
......................................................................Pt100: 0.2 % of span
.............................................................. mA, mV, V: 0.2 % of span
Input impedance:..........................................................................
............................... 0-50 mV, Pt100 and thermocouples: >10 MΩ
.....................................................................0-5 V, 0-10 V: >1 MΩ
.................................0-20 mA, 4-20 mA: 15 Ω(+2 Vdc @ 20 mA)
Pt100 measurement: ............DIN 43760 standard (α= 0.00385)
Excitation current:.................................0.750 mA. 3-wire circuit,
cable resistance compensation
ANALOG OUTPUT: ........................0-20 mA or 4-20 mA, 500 Ωmax.
..............................................................................4000 levels, Isolated
RELAY OUTPUT:..................................................................................
........................ALM1, ALM2: SPDT 3 A / 240 Vac (3 A / 30 Vdc Res.)
............. ALM3, ALM4: SPST-NO: 1.5 A / 250 Vac (3 A / 30 Vdc Res.)
AUXILIARY POWER SUPPLY:....................... 24 Vdc, ±10 %; 25 mA
EMC:............................... 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 OF 6.3
MM.
FRONTAL PANEL:.............................IP65, polycarbonate UL94 V-2.
HOUSING:................................................. IP20, ABS + PC UL94 V-0.
START-UP: 3 seconds after power up.
CERTIFICATIONS:
ORDERING INFORMATION
N1500 - 4R - RT - 485 - 24V
A B C D E
A: Series model: N1500
B: Relays outputs: Blank (2 relays); 4R (4 relays)
C: Analog output: RT –(Retransmission of the input signal) or Blank
D: Digital Communication: 485 –(RS485, ModBus protocol) or
Blank
E: Voltage rating: Blank (100-240 Vac/dc); 24V (12 to 24 Vdc / 24
Vac)
WARRANTY
Warranty conditions are available on our website
www.novusautomation.com/warranty.