Novus DIGIRAIL-2A User manual

NOVUS AUTOMATION 1/2
DIGIRAIL
-2A
UNIVERSAL ANALOG INPUT MODULES
INSTRUCTION MANUAL
−V1.0x F
INTRODUCTION
The universal analog input Modbus module DigiRail-2A is a remote
measuring unit with two configurable analog inputs. An RS485 serial
interface allows reading and configuring these inputs through the
communication network. It is appropriate for mounting on DIN 35
mm rails.
The inputs are electrically insulated from the serial interface and the
module supply. There is no electrical insulation between inputs.
There is also no electrical insulation between serial interface and
supply.
DigiRail-2A configuration is performed through the RS485 interface
by using Modbus RTU commands. The DigiConfig software allows
configuring all DigiRail features as well as performing its diagnostic.
DigiConfig offers features for detecting the devices present in the
Modbus network and for configuring the DigiRail-2A communication
parameters.
This manual provides instructions to install and connect the module.
The DigiConfig installer and the documentation regarding Modbus
communication for DigiRail-2A (DigiRail-2A Communication
Manual) are available at www.novusautomation.com.
ELECTRICAL INSTALLATION
INSTALLATION RECOMMENDATIONS
•Input and communication signal conductors must pass through
the system plant separated from the electrical network
conductors. If possible, in grounded conduits.
•The supply for the instruments must be provided from a proper
instrumentation network.
•In control and monitoring applications, it is essential considering
what may occur if any of the system parts should fail.
•We recommend the use of RC FILTERS (47Ω and 100nF,
series) in parallel with contactor and solenoid coils which are
close or connected to DigiRail.
ELECTRICAL CONNECTIONS
Figure 1shows the necessary electrical connections. The terminals
1, 2, 3, 7, 8 and 9 are intended for the input connections, 5 and 6 for
the module supply and 10, 11 and 12 for the digital communication.
For obtaining a better electrical contact with the connectors, we
recommend the use of pin terminals at the conductor end. For direct
wire connection, the minimum gage recommended is 0.14 mm², not
exceeding 4.00 mm².
Be careful when connecting the supply terminals to
the DigiRail. If the positive conductor of the supply
source is connected, even momentarily, to one of the
communication
connection terminals, the module
may be damaged.
Figure 1 –Electrical connections
Table 1shows how to connect the connectors to the RS485
communication interface:
Bidirectional data line. Terminal 10
Inverted bidirectional data
line. Terminal 11
Optional connection which
improves the communication
performance.
Terminal 12
Table 1 –RS485 Connections
CONNECTIONS – INPUT 0-5 VDC / 0-10 VDC
For using the 0-5 Vdc and 0-10 Vdc input types, it is necessary to
switch the position of the inner module jumpers. To this end, the
module must be opened and jumpers J1 and J2 (input 1 and input 2,
respectively) must be changed due to the following options:
•For 0-5 Vdc and 0-10 Vdc input types, positions 1 and 2 must
be strapped.
•For all other input types, positions 2 and 3 must be strapped
(factory position).
Figure 2 –Jumper for 0-5 Vdc and 0-10 Vdc input

DigiRail-2A
NOVUS AUTOMATION 2/2
CONFIGURATION
The user will receive the module perfectly calibrated. No adjustment
will be required. The original configuration features the following
features:
Sensor thermocouple type J, Indication °C, Filter = 0
Address = 247, Baud Rate = 1200, Parity = Even,
1 Stop Bit
The application DigiConfig is a program for Windows used to
configure the DigiRail modules. For its installation, run the
DigiConfigSetup.exe file, available on our website and follow the
instructions as shown.
DigiConfig is provided with a help file. For using it, start the
application and select the "Help" menu or press the F1 key.
Go to www.novusautomation.com to obtain the DigiConfig installer
and the additional product manuals.
SPECIFICATIONS
Inputs: 2 universal analog inputs.
Input signals: Configurable. Refer to Table 2.
Thermocouples: Types J, K, T, R, S, B, N and E, according to
NBR 12771. Impedance >> 1MΩ
Pt100: 3-wires type, α= .00385, NBR 13773, Excitation: 700 µA.
For using Pt100 2-wires, interconnect terminals 2 and 3.
When gauging the module using the calibrator for
Pt100, be sure that the minimum current required for
it is compatible with the specified excitation current:
700 µA.
Other Signals:
•0 to 20 mV, -10 to 20 mV, 0 to 50 mV.
Impedance >> 1 MΩ
•0 to 5 Vdc, 0 to 10 Vdc. Impedance >> 1 MΩ
•0 to 20 mA, 4 to 20 mA.
Impedance = 100 Ω(+ 1.7 Vdc)
Overall accuracy (at 25°C): Thermocouples: 0.25 % of the
maximum range, ±1°C; Pt100, voltage and current: 0.15 % of the
maximum range.
In the standard model, the 0-5 Vdc and 0-10 Vdc
inputs are not factory calibrated and have an
accuracy of about 5 %.
When properly calibrated, they can have an accuracy
of up to 0.15 %.
INPUT SIGNAL MAXIMUM MEASURING RANGE
Thermocouple J -130 to 940 °C (-202 to 1724 °F)
Thermocouple K -200 to 1370 °C (-328 to 2498 °F)
Thermocouple T -200 to 400 °C (-328 to 752 °F)
Thermocouple E -100 to 720 °C (-148 to 1328 °F)
Thermocouple N -200 to 1300 °C (-328 to 2372 °F)
Thermocouple R 0 to 1760 °C (-32 to 3200 °F)
Thermocouple S 0 to 1760 °C (-32 to 3200 °F)
Thermocouple B 500 to 1800 °C (932 to 3272 °F)
Pt100 -200 to 650°C (-328 to 1202 °F)
INPUT SIGNAL MAXIMUM MEASURING RANGE
0 to 20 mV
-10 to 20 mV
0 to 50 mV
*0 to 5 Vdc Adjustable between -31000 and +31000
*
0 to 10 Vdc
0 to 20 mA
4 to 20 mA
Table 2 –Sensors and signals accepted by the module
Sampling rate: from 2.5 to 10 samples per second
Internal compensation of Cold Junction for thermocouples.
Power: 10 to 35 Vdc. Typical consumption: 50 mA @ 24 V. Internal
protection against polarity inversion.
Electrical insulation between inputs and supply/serial port:
1000 Vac.
Serial communication: RS485 at two wires, Modbus RTU protocol.
Configurable parameters: Communication speed: From 1200 to
115200 bps; Parity: Even, odd or none
Key for restoring communication parameters: The RCom key, at
the front panel, will set the device in diagnostics mode (Address =
246; Baud rate = 1200; Parity = Even, Stop Bit = 1), able to be
detected and configured by the DigiConfig software.
Frontal light indicators for communication and status:
TX: Signalizes that the device is sending data on the RS485
line.
RX: Signalizes that the device is receiving data on the RS485
line.
Status: When the light is permanently on, this means that the
device is in normal operation. When the light is flashing in a
second interval (approximately), this means that the device is in
diagnostics mode. When the light is flashing fast, this means
that there is an internal error.
Operating temperature: 0 to 70 °C
Operational relative humidity: 0 to 90 % RH
Envelope of the terminals: Polyamide
Assembly:DIN 35 mm rail
Certification: CE
Dimensions: Refer to Figure 3.
Figure 3 –Dimensions
WARRANTY
Warranty conditions are available on our website
www.novusautomation.com/warranty.