NOVUS DigiRail-4C User Manual

DigiRail-4C

Digital Counter Input Module

INSTRUCTION MANUAL

INTRODUCTION

The Modbus Module for Digital Inputs - DigiRail-4C is an electronic unit with four digital counter inputs An RS485 serial
interface allows reading and configuration of these inputs, through communication network. It's 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 serial interface and supply. There is no electrical insulation between the inputs 1 and 2 (common negative
terminal), as well as between the inputs 3 and 4.

Configuration of the DigiRail-4C is performed through the RS485 interface by using Modbus RTU commands. The
DigiConfig software allows the configuration of all features of the DigiRail as well as its diagnostics. The DigiConfig
offers features for detecting the devices present in the Modbus network and for configuring the communication
parameters of the DigiRail-4C.

This manual provides the instructions for installation and connection of the module. The installer for DigiConfig and the
documentation regarding Modbus communication for the DigiRail-4C (Communication Manual of the DigiRail-4C) are
included in the CD-ROM which accompanies the product. They are also available for download at

www.novusautomation.com.

SPECIFICATIONS

Inputs: 4 Digital Inputs: Logical level 0 = 0 to 1 Vdc; Logical level 1 = 4 to 35 Vdc
Internal current limitation at the inputs: approximately 5 mA
Maximum count frequency: 1000 Hz for signals with square wave and working cycle of 50%. Input 1 can be configured

for counting signals of up to 100 kHz.

Counting capacity (per input): 32 bits (0 to 4.294.967.295)
Special countings: Capable of counting pulses in given time intervals (pulse rate) and retaining peak countings in given

time intervals (peak rate). Independent time intervals for both functions.

Power: 10 to 35 Vdc / 50 mA maximum. Internal protection against polarity inversion.
Electrical insulation between inputs and supply/serial port: 1000 Vdc for 1 minute
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, 1 stop bit), 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.
Software configurator in Windows environment: DigiConfig
Electromagnetic compatibility: EN 61326:2000
Operating temperature: 0 to 70 °C
Operational relative humidity: 0 to 90% RH
Assembly: DIN 35 mm rail
Dimensions: Figure 1 shows the dimensions of the module.

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DigiRail 4C

Figure 1 – Dimensions

ELECTRICAL INSTALLATION

RECOMMENDATIONS FOR INSTALLATION

•

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 network for instrumentation.

•

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 (47R and 100nF, series) in parallel with contactor and solenoid coils which

are close or connected to DigiRail.

ELECTRICAL CONNECTIONS
Figure 2 shows 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 conductors' 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 2 – Electrical Connections

Additional information regarding the connection and use of the communication network can be found in the
Communication Manual of DigiRail-4C, included in the CD-ROM which accompanies the product.

CONFIGURATION

The application DigiConfig is a program for Windows® used for configuration of the modules DigiRail. For its
installation, run the DigiConfigSetup.exe file from the CD-ROM of the product and follow the instructions as shown.

DigiConfig is provided with a complete help file, giving all the information necessary for its full use. For using the help
feature, start the application and chose the "Help" menu or press the F1 key.

If you do not have the CD-ROM which comes together with the product, go to www.novusautomation.com in order to
obtain the installer for DigiConfig and the additional product manuals.

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