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NOVUS N1540 Process Indicator User Manual

N1540 process indicator, Features

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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).