NOVUS AUTOMATION
1/5
N1540 Process Indicator
UNIVERSAL INDICATOR – INSTRUCTIONS MANUAL – V1.1x A
PRESENTATION
N1540 is a quite versatile process indicator. With a wide list of input
types - thermocouples, thermo-resistance, voltage and current – the
N1540 is capable of measuring the majority of the variables and
sensors encountered in industrial processes.
It contains two alarms (six functions), sensor offset, configuration of
parameters protected by password, serial communication, indication in
degrees Celsius (°C) or Fahrenheit (°F), among others.
The configuration can be performed directly on the indicator or through
the USB interface. The NConfig software (free) is the configuration
management tool. Connected to the USB of a Windows computer, the
indicator is recognized as a serial communications port (COM) running
with a Modbus RTU protocol.
Through the USB interface, even if disconnected from the power
supply, the configuration performed in a piece of equipment can be can
be saved in a file and repeated in other pieces of equipment that
require the same configuration.
FEATURES
SIGNAL INPUT (TYPE)
The input type to be used by the indicator is defined in the equipment
configuration. Table 01 presents the input options available for the user.
TYPE
CODE
RANGE OF MEASUREMENT
J
Tc j
Range: -110 to 950 ºC (-166 to 1742 ºF)
K
Tc k
Range: -150 to 1370 ºC (-238 to 2498 ºF)
T
Tc t
Range: -160 to 400 ºC (-256 to 752 ºF)
N
Tc n
Range: -270 to 1300 ºC (-454 to 2372 ºF)
R
Tc r
Range: -50 to 1760 ºC (-58 to 3200 ºF)
S
Tc s
Range: -50 to 1760 ºC (-58 to 3200 ºF)
B
Tc b
Range: 400 to 1800 ºC (752 to 3272 ºF)
E
Tc e
Range: -90 to 730 ºC (-130 to 1346 ºF)
Pt100
Pt
Range: -200 to 850 ºC (-328 to 1562 ºF)
0-20 mA
L0.20
Analog Linear Signal
Indication programmable from -1999 to
9999.
4-20 mA
L4.20
0–50 mV
L0.50
0-5 V DC
L0.5
0-10 V DC
L0.10
4-20 mA
NON
LINEAR
Lnj
Non Linear Analog Signal
Indication range according to the
associated sensor.
Ln k
ln t
ln n
ln r
ln s
ln b
ln E
Ln.Pt
Table 01 – Inputs Types
ALARMS
The instrument has two alarm outputs: Alarm-1 and Alarm-2.
The alarms can assume the functions described on Table 02.
off
Alarm off.
lo
Alarm of the Absolute Minimum
Value. It triggers when the value of
the PV is below the value defined
by the alarm Setpoint (SPA1 or
SPA2).
SPA1
PV
ki
Alarm of the Absolute Maximum
Value. It triggers when the value of
the PV is above the value defined
by the alarm Setpoint.
SPA1
PV
dif
Alarm of the Differential Value. In this function the parameters
“
SPA1
” and “
SPA2
” represent errors (difference) between the PV
and one reference value
ALrF
.
ALrF
PV
ALrF+SPA1
ALrF–SPA1
ALrF
PV
ALrF – SPA1
ALrF + SPA1
SPA1 positive
SPA1 negative
difl
Alarm of the Minimum Differential Value. It triggers when the
value of the PV is below the point defined by:
ALrF-SPA1 (using alarm 1 as an example).
ALrF
PV
ALrF – SPA1
ALrF
PV
ALrF – SPA1
SPA1 positive
SPA1 negative
difk
Alarm of the Maximum Differential Value. It triggers when the
value of the PV is above the point defined by:
ALrF+SPA1 (using alarm 1 as an example).
ALrF
PV
ALrF + SPA1
ALrF
PV
ALrF + SPA1
SPA1 positive
SPA1 negative
ierr
Alarms of the Sensor Break (Sensor Break Alarm). It is activated
when the Input presents problems such as interrupted sensor, bad
connection, etc.
Table 02 – Alarm Functions
Note: The figures are also valid for Alarm 2 (SPA2).
BLOCKING INITIAL OF THE ALARM
The initial blocking option inhibits the alarm from being recognized
if an alarm condition is present in the process when the indicator is
first energized. The alarm will be enabled only after the occurrence of
no alarm condition.
The initial blocking is useful, for example, when one of the alarms is
set up as a minimum value alarm, which may cause the activation of
the alarm soon upon the process start-up; an occurrence that may
undesirable in many cases.
The initial blocking is not valid for the function
ierr
(Sensor Break).