N1540 Indicator
NOVUS AUTOMATION
2/5
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). 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.
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
.
USB INTERFACE
The USB interface is used for CONFIGURING or MONITORING the
indicator. The NConfig software must be used for the configuration.
It makes it possible to create, view, save and open configurations
from the equipment or files in your computer. The tool for saving and
opening configurations in files makes it possible to transfer
configurations between pieces of equipment and to make backup
copies. For specific models, the NConfig software also makes it
possible to update the firmware (internal software) of the indicator
through the USB.
For MONITORING purposes you can use any supervisory software
(SCADA) or laboratory software that supports the MODBUS RTU
communication on a serial communications port. When connected to
the USB of a computer, the indicator is recognized as a conventional
serial port (COM x). Use the NConfig software or consult the
DEVICE MANAGER in the Windows CONTROL PANEL to identify
the COM port that was assigned to the indicator. Consult the
mapping of the MODBUS memory in the indicator’s communications
manual and the documentation of your supervisory software to
conduct the MONITORING process.
Follow the procedure below to use the USB communication of the
equipment:
1.
Download the NConfig software from our website and install it on
your computer. The USB drivers necessary for operating the
communication will be installed together with the software.
2.
Connect the USB cable between the equipment and the
computer. The indicator does not have to be connected to a
power supply. The USB will provide enough power to operate the
communication (other equipment functions cannot operate).
3.
Open the NConfig software, configure the communication and
start recognition of the device.
4.
Consult the NConfig help desk for detailed instructions about
how to use it and solve problems.
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.
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.
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 01.
Figure 01 – Inputs connections and power supply
Figure 02 – Thermocouple, Pt100 and 50 mV signal connection