NOVUS N1540 Universal Input Panel Meter Instruction Manual

N1540 Process Indicator
UNIVERSAL INDICATOR – INSTRUCTIONS MANUAL – V2.1x E 

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. Configuration can be performed either directly on the indicator or via the USB interface once QuickTune software has been installed on the computer to be used. Once connected to USB, the device will be recognized as a serial communication (COM) port operating with 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.

4-20 mA
NON
LINEAR| | Non Linear Analog Signal Indication range according to the associated sensor.

Table 01 – Inputs Types

ALARMS
The indicator has two alarms. Each alarm is associated with an output with the same name: AM1 and ALM2. The alarms can assume the functions described on Table 02.

Table 02 – Alarm Functions

Note: The figures are also valid for Alarm 2 (SPA2).
Important note: Alarms configured with the and functions also trigger their associated output when a sensor fault is identified and signaled by the indicator. A relay output, for example, configured to act as a High Alarm , will operate when the SPAL value is exceeded and also when the sensor connected to the indicator input is broken.

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 (Sensor Break).

OFFSET
Allows fine adjustments to the PV indication, correcting measurement errors that appear, for example, after the replacement of the temperature sensor.

MAXIMUM AND MINIMUM

The indicator memorizes the measured maximum and minimum values (peak and valley). The operator can observe these extreme values at any time. These two values are shown when pressing the F1 (maximum) and F2 (minimum) keys. Pressing both keys simultaneously will clear the memory for a new peak and valley detection.
To clear the stored values and begin a new cycle of monitoring endpoints, just press the F1 and F2 keys simultaneously. When turn off the indicator this information is not saved.

CUSTOM LINEARIZATION

This feature allows accurate measurement of the input signals with nonlinear characteristics.
Linearization consists in dividing the calibration curve of the input signal into segments of variable gain. Each segment consists of a start and an end. For each input value a respective output indication is defined.
The input signal must present an always-crescent.
Applied to 0-20 mA, 4-20 mA, 0-50 mV, 0-5 V and 0-10 V input types.

24 VDC AUXILIARY VOLTAGE SOURCE
The standard version of the N1540 provides an auxiliary power supply for exciting field transmitters (terminals 11 and 13 on the rear panel).

SERIAL COMMUNICATION
Follows a description of the usual communication registers. For full documentation download the Registers Table N1540 for Serial Communication on our web site – www.novusautomation.com.

RS485 INTERFACE: ELECTRICAL CONNECTION
The RS485 signals are:

Terminal 19

GND

USB INTERFACE

The USB interface is used to CONFIGURE, MONITOR or UPDATE the controller FIRMWARE. The user should use QuickTune software, which offers features to create, view, save and open settings from the device or files on the computer. The tool for saving and opening configurations in files allows the user to transfer settings between devices and perform backup copies.
For specific models, QuickTune allows to update the firmware (internal software) of the controller via the USB interface.
For MONITORING purposes, the user can use any supervisory software (SCADA) or laboratory software that supports the MODBUS RTU communication over a serial communication port. When connected to a computer’s USB, the controller is recognized as a conventional serial port (COM x).
The user must use QuickTune software or consult the DEVICE MANAGER on the Windows Control Panel to identify the COM port assigned to the controller.
The user should consult the mapping of the MODBUS memory in the controller’s communication manual and the documentation of the supervision software to start the MONITORING process.
Follow the procedure below to use the USB communication of the device:

1. Download QuickTune software from our website and install it on the computer. The USB drivers necessary for operating the communication will be installed with the software.
2. Connect the USB cable between the device and the computer. The controller does not have to be connected to a power supply. The USB will provide enough power to operate the communication (other device functions may not operate).
3. Run the QuickTune software, configure the communication and start the device recognition.

The USB interface IS NOT SEPARATE from the signal input (PV) or the indicator’s digital inputs and outputs. It is intended for temporary use during CONFIGURATION and MONITORING periods. For the safety of people and equipment, it must only be used when the piece of equipment is completely disconnected from the input/output signals. Using the USB in any other type of connection is possible but requires a careful analysis by the person responsible for installing it. When MONITORING for long periods of time and with connected inputs and outputs, we recommend using the RS485 interface, which is available or optional in most of our products.

RETRANSMISSION OF PV

The indicator may include an analog output which performs the retransmission of the measured process variable (PV) values. The analog retransmission can be scaled, i.e., there are minimum and maximum limits to establish the retransmission range, defined in the parameters “ ” and “ ”.
The indicator allows a ratio between indication range and output current with inversely proportional behavior ( ).
The analog output is available on terminals 18 (+) and 19 (-) for models N1540-RT and N1540-RT-24V.
The user sets the relay signal between 0 to 20 mA and 4 to 20 mA.
In order to obtain retransmission at an electrical voltage of 0 to 10 V, the user shall install a shunt resistor (500 Ω max.) across the analog output terminals and select the 0 to 20 mA signal as the electrical relay signal.
The analog retransmission output is electrically isolated the other indicator circuits.

Note: RS485 Communication and PV Retransmission features are mutually exclusive.

INSTALLATION / CONNECTIONS

The indicator is meant for panel mounting. The sequence of steps is:

• Prepare a cut-out of 93.0 by 45.5 mm on the panel;
• Remove the mounting clamp from the indicator;
• Insert the indicator into the cut-out from the front side of the panel;
• Place the clamp on the indicator again, pressing until firm grip to the panel.

SAFETY ALERTS
The symbols below are used on the equipment and throughout this manual in order to draw the user´s attention to important information related to the equipment safety and operation.

**|
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CAUTION:
Read the manual thoroughly before installing and operating the instrument| 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.

ELECTRICAL CONNECTIONS
The terminals configurations are shown in Figure 03:

It is necessary to observe the existence of polarity in the connection of power supply line in models 24 V: Terminal 18 = (+) and terminal 19 = (-).

This indicator offers an auxiliary 24 Vdc power supply which is typically applied to power up two wire 4-20 mA field transmitters. The Figure 06 presents the wiring for this application:

RECOMMENDATIONS FOR THE INSTALLATION

• To minimize the pick-up of electrical noise, the low voltage DC connections and the sensor input wiring should be routed away from high-current power conductors. If this is impractical, use shielded cables. In general, keep cable lengths to a minimum.
• The input signals conductors shall be positioned throughout the factory separate from the output and the power supply conductors, in grounded conduits if possible.
• The power supply of the electronic instruments shall come from a proper source for the instrumentation network.
• It is recommended to use RC FILTERS (0,1 uF in series with 100 ohms) to suppress the noise generated by contactors coils, solenoids, etc.

OPERATION

The indicator front panel, together with its elements, can be seen on Figure 08:

Display: Shows the process variable PV, the configuration parameters prompts and their respective values/conditions.
Indicators A1 and A2 : signalize the occurrence of an alarm condition.

Key P: used to walk through the parameters in the menu cycles.
F1 / key and F2 / key: Used to change parameter values.
Key : go back to the previous displayed parameter.

START UP
When the indicator is powered up, the indicator displays the number of the software version present in the first 3 seconds, then the value of the measured process variable (PV) is shown in the display. This is the Indication Screen.
To be used, the indicator must be previously configured. The configuration consists of the definition of each of the various parameters displayed. The user must understand the importance of each parameter and determine a valid condition or a valid value for each one of them.
The configuration parameters are grouped in levels according to their
affinity. The 5 parameters levels are:
– Operation
– Alarms
– Input
– Linearization
– Calibration
The P key provides the access to the levels and to the parameters of these levels.
Keeping the P key pressed, at every 2 seconds, the indicator jumps from one level to another, presenting the first parameter of each level:

To enter into 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 parameters, use the Key.
After the last parameter of the cycle, the indicator always returns to the PV Indication screen.
The display alternates the presentation of the parameter prompt and its value. The parameter value is displayed with a light blinking to differentiate it from the parameter prompt.
Depending on the level of parameter protection adopted, the parameter precedes the first parameter in the level where the protection is active. See section CONFIGURATION PROTECTION.

DESCRIPTION OF THE PARAMETERS

OPERATION CYCLE

PV| Indication Display of PV. The value of the measured variable (PV) is shown on the upper display (red).
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Setpoint Alarm
| Alarm SP: Value that defines the alarm activation point.
For the alarms set up with the functions of the type Differential, these parameters define the maximum
differences accepted between PV and a reference value defined in the parameter . For the alarm function , this parameter is not used. Parameters shown in this level only when enabled in the parameters and .

ALARMS CYCLE

| Alarm Functions. It defines the functions of the alarms among the options in Table 02.
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Alarm Reference
| Reference value used for the alarms with differential function, minimum differential or maximum differential.

Setpoint Alarm| Alarm SP: Value that defines the point of activation of the alarm outputs. For the alarms programmed with the functions of the type Differential , these parameters represent the deviations.
| For the alarm function, this parameter has no meaning.
| It allows the parameters SPA1 and SPA2 to be displays also in the indicator operation cycle.
SP Enable| Shows the parameters SPA1/SPA2 in the operation cycle.
Does not show the parameters SPA1/SPA2 in the operation cycle.
Blocking Alarm| Alarms Initial Blocking.
Enables the initial blocking.
Inhibits the initial blocking.
Hysteresis of
Alarm
| Alarm Hysteresis. It defines the difference between the value of PV at which the alarm is triggered and the
value at which it is turned off.
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Flash
| It allows signalization of an alarm conditions occurrence by flashing the indication of PV on the indication
display.
Enables alarm signalization by flashing PV.
Disables the flashing PV.

INPUT CYCLE

| Input Type. Selection of the input type, used by the indicator. Refer to Table 01.
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| Digital Input Filter — Used to improve the stability of the measured signal (PV). Adjustable between 0 and 20. At 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.

Decimal Point| It determines the position of the decimal point on the display.

Unit| It defines the temperature unit to be used:
Indication in Celsius.
Indication in Fahrenheit.

Offset| Parameter that allows the user to make fine
adjustments to the indicated PV value.

Input Low
Limit| It defines the lower value of the indication range when
the input types of 0-20 mA, 4-20 mA, 0-50 mV, 0-5 V and 0-10 V are used.

Input High
Limit| It defines the upper value of the indication range when
the input types of 0-20 mA, 4-20 mA, 0-50 mV, 0-5 V and 0-10 V are used.

Retrans-
mission| It allows the definition of the mode of retransmission of PV.
Determines retransmission in 0-20 mA.
Determines retransmission in 4-20 mA.
Parameter showed when there is retransmission of PV available on the indicator.

Retrans-  mission Low Lima| It defines the lower limit of the retransmission range of
PV. Parameter shown there is retransmission of PV available on the indicator.

Retrans-
mission High
Limit| It defines the upper limit of the retransmission range of
PV. Parameter shown there is retransmission of PV available on the indicator.

Baud Rate| Baud Rate of the serial communication. In kbps.
1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6 and 115.2

Parity| Parity of the serial communication.
 Without parity
Even parity
Odd parity

Address| Communication Address. A number that identifies the indicator in the serial communication network, between 1 and 247.

CUSTOM LINEARIZATION CYCLE

| Enables custom linearization. When you enable this parameter, the display shall meet the requirements set points defined in the parameters below.
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| Defines the extreme points of the ten possible segments for custom linearization. Values in inputsignal unit: mA, mV or V.
| Defines the indications corresponding to the extreme points of the ten segments of the custom
linearization defined in the parameter ( ) above. Values displayed in the desired display unit.

CALIBRATION CYCLE
All types of input are calibrated in the factory. In case a recalibration is required; it shall be carried out by a specialized professional. In case this cycle is accidentally accessed, do not perform alteration in its parameters. The factory calibration can be restored in the parameter .

| Password. Entering the Access password. This
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parameter is presented before the protected cycles. See item Protection of Configuration.
| Calibration. Enables the possibility for calibration of
the indicator. When the calibration is not enabled, the related parameters are hidden.
| Input Low Calibration. Indication of the low scale
calibration signal applied to the input.
| Input High Calibration. Indication of the full scale
calibration signal applied to the input.
| Restore. It restores the factory calibrations of the
input, disregarding any modifications carried out by the user.
| Cold Junction. Temperature of the indicator cold
junction.
| Password Change. It allows the definition of a new
access password, always different from zero.
| Protection. Sets up the Level of Protection. See Table
03.
| Frequency. Frequency of the local electrical network.
| First part of the indicator serial number.
| Second part of the indicator serial number.

CONFIGURATION PROTECTION

The indicator provides means for protecting the parameters configurations, not allowing modifications to the parameters values, avoiding tampering or improper manipulation. The parameter Protection ( ) in the Calibration level determines the protection strategy, limiting the access to particular levels, as shown in the table below.

Table 03 – Levels of Protection of the Configuration

ACCESS 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 OF THE ACCESS PASSWORD
The protection system built into the indicator blocks for 10 minutes  the access to protected parameters after 5 consecutive frustrated attempts of guessing the correct password.

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 ( ). 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 indicator added to the number 9000. As an example, for the equipment with serial number 07154321, the master password is 9 3 2 1. The indicator serial number can be obtained by pressing  for 5 seconds.

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:

1. Configure the input type to be calibrated.
2. Configure the lower and upper indication limits for the maximum span of the selected input type.
3. Connect to the input terminals a signal corresponding to a known indication value a little above the lower display limit.
4. Access the parameter . With the keys and adjust the display reading to match the applied signal. Then press the P key to store.
5. Inject a signal that corresponds to a value a little lower than the upper limit of indication.
6. Access the parameter . With the keys and  adjust  the display reading to match the applied signal. Then press the P key to store.
7. Validate the calibration.

Note: When checking the indicator calibration with a Pt100 simulator, pay attention to the simulator minimum excitation current requirement, which may not be compatible with the 0.170 mA excitation current provided by the indicator.

ANALOG OUTPUT CALIBRATION

1. Configure the retransmission type ( ).
2. Install a milliampere meter at the terminals 18(+) and 19(-).
3. Enter the Calibration Cycle.
4. Select the ( screen.
5. Press the key or the key .
6. Read the current value displayed on the milliampere meter. With the help of the keys and , adjust the value displayed on the indicator to match the value displayed on the milliampere meter.
7. Press the P key to save and access the ( parameter.
8. Press the key or the key .
9. Reread the new current value displayed by the milliamperemeter. With the help of the keys and , adjust the value displayed on the indicator to match the value displayed on themilliampere meter.
10. Read the current displayed in the milliampere meter and indicated in the o screen through the keys and .
11. Exit the Calibration Cycle.
12. Validate the performed calibration.

SPECIFICATIONS

DIMENSIONS: ………………………… 96 x 48 x 35 mm (1/16 DIN)
Panel Cut-out ………………………………… 93.0 x 45.5 mm
Approximate Weight: ……………………………………. 110 g
POWER SUPPLY: ………………… 100 to 240 Vac/dc (±10 %), 50/60 Hz
Optional 24 V: ……………….. 12 to 24 Vdc / 24 Vac (-10 % / +20 %)
Maximum consumption: ………………………….. 6 VA
ENVIRONMENTAL CONDITIONS:
Operation Temperature: ……………………………………….. 0 to 50 ºC
Relative Humidity: ……………………………………………. 80 % @ 30 ºC
For temperatures above 30 ºC, reduce 3 % per ºC. Indoor use;
Installation Category II, Pollution Degree 2; altitude < 2000 m.
INPUT ………………………………………………………. According to Table 01
Internal Resolution: ……………………………….. 32767 levels (15 bits)
Display Resolution: ……………. 32000 levels (from -2000 to 30000)
Temperature Resolution: …………………………………. 0.1 / 1 °F / °C
Input reading rate: ……………………………………up to 55 per second
Accuracy: … Thermocouples J, K, T, E: 0.25 % of the span ±1 ºC
………………. Thermocouples N, R, S, B: 0.25 % of the span ±3 ºC
………………………………………………………. Pt100: 0.2 % of the span
………………… 4-20 mA, 0-50 mV, 0-5 V, 0-10 V: 0.2 % of the span
Input impedance: …….. Pt100, thermocouples, 0-50 mV: > 10 MΩ
……………………………………………………….. 0-5 V, 0-10 V: > 500 kΩ
…………………………………………………………………… 4-20 mA: 100 Ω
Measuring of the Pt100: ……………………. 3 wire type, (α=0.00385)
With compensation of the cable length, max 50 meters, excitation current of 0.170 mA.
OUTPUT ALARM1: ……………… Relay SPST; 240 Vac / 30 Vdc / 1.5 A
OUTPUT ALARM2: ……………… Relay SPST; 240 Vac / 30 Vdc / 1.5 A
RETRANSMISSION (mA RT – OUTPUT): ………….0-20 mA / 4-20 Ma
Accuracy ……………………………………………………………… 0.15 % FS
Maximum impedance ………………………………… 500 Ω (10 V max.)
Thermal coefficient ………………………………………….. 0.004 mA / °C
Resolution ………………………………………………………….. < 0.005 mA
AUXILIARY VOLTAGE SOURCE: ……. 24 Vdc (±10 %) / 20 mA max.
CASE: …………………………………………… Polycarbonate (PC) UL94 V-2
BACK PANEL: ……………………………………………… ABS+PC UL94 V-0
CONNECTIONS (WIRING): …….. Plug-in block terminals, 5 mm pitch
USB INTERFACE: 2.0, CDC class (virtual communications port), MODBUS RTU protocol.
STARTS OPERATION: After 3 seconds connected to the power supply.
CERTIFICATIONS:

IDENTIFICATION

Note:

1. Communication signals are electrically isolated from the other of the indicator circuits.
2. The analog output circuit is electrically isolated from the other indicator circuits.
3. RS485 Communication and PV Retransmission features are mutually exclusive.

MAINTENANCE

PROBLEMS WITH THE INDICATOR
Connection errors and inadequate programming are the most common problems encountered during the indicator operation. A final revision can avoid loss of time and damages. The indicator displays some messages to help the user identify the problems.

configuration.

Other error messages may indicate hardware problems requiring maintenance service.

WARRANTY

Warranty conditions are available on our website
www.novusautomation.com/warranty.

References

• NOVUS Automation Inc. - Controllers, Thermostats, Data Loggers, Solid State Relays, Sensors, Transmitters, SCADA, Data Acquisition and Temperature Controllers

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