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DigiRail MODBUS Remote Terminal Units


Description

 

For a more capable range of Modbus RTU's >>

 

The DigiRail line of smart transmitters with Modbus RTU comunication interface provide a simple way for integrating analogue or digital signals to supervisory SCADA systems. There are three models in the range, a 2-channel universal analogue input unit, a 2-channel relay output units and a 4-channel digital input/counter unit.

The input signals are isolated from power thus protecting the electrical instruments by eliminating ground loop effects. This reduces substantially the undesirable interferences and instabilities in sensor measurements

DigiRail can be easily configured and calibrated via the digital interface by using the Windows based Digiconfig software.

 

Models

 
DIGIRAIL-2A

2-Channel Universal Analogue Input


 

 

 

  • 2 Analogue inputs: programmable for thermocouples (J, K, T, E, N, R, S, B), Pt100, mV, V, mA.

  • Cold junction compensation for thermocouples and compensation for Pt100 3-wire cables.
  • Open loop detection for thermocouples, Pt100 and mV.
  • Sampling rate for 1 analogue input: 10Hz for mV, V and mA. 5Hz for t thermocouples and Pt100.
  • Analogue input resolution: 17 bits.
  • User defined linearization for the analogue inputs.
  • Power: 10 to 35Vdc, 50mA maximum current.
  • 2-wire RS485 communication with Modbus RTU protocol. Configurable address and baud rate (1,200 to 115,200bps).
  • LED indicators for communication and status.
  • Accuracy (at 25°C): Pt100, mV, V and mA: ±0.15% of full scale. Thermocouples: ±0.25% of full scale.
  • Temperature effect: 0.003% of full scale/°C.
  • Cold junction compensation for thermocouples: 1°C at 25°C. ±0.05°C/°C.
  • Isolation: 1000Vac from inputs (analogue or digital) and power or communication.
  • Windows based configurator software.
  • Dimentions: 72 x 78 x 19mm.
  • Mounting: 35mm DIN rail.
  • Working temperature: 0 to 70°C.

User Manual >>

DIGIRAIL-2R

2-Channel Relay Output

 

 

  • 2 Relay outputs: 3A / 250Vac SPDT relay, resistive load.

  • Power: 10 to 35Vdc, 50mA maximum current.
  • 2-wire RS485 communication with Modbus RTU protocol. Configurable address and baud rate (1,200 to 115,200bps).
  • LED indicators for communication and status.
  • Key for resetting communication parameters to original factory default.
  • Isolation: 1000Vac from inputs (analog or digital) and power or communication.
  • Windows based configurator software.
  • Dimentions: 72 x 78 x 19mm.
  • Mounting: 35mm DIN rail.
  • Working temperature: 0 to 70°C

User Manual >>

 

DIGIRAIL-4C

4-Channel Digital Input/Counter

 

 

  • Digital inputs: in voltage, 4 to 35V to activate. Internally limited current to 5mA.

  • 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 4294967295)
  • Power: 10 to 35Vdc, 50mA maximum current.
  • 2-wire RS485 communication with Modbus RTU protocol. Configurable address and baud rate (1,200 to 115,200bps).
  • LED indicators for communication and status.
  • Key for resetting communication parameters to original factory default.
  • Isolation: 1000Vac from inputs (analog or digital) and power or communication.
  • Windows based configurator software.
  • Dimentions: 72 x 78 x 19mm.
  • Mounting: 35mm DIN rail.
  • Working temperature: 0 to 70°C.

User Manual >>

Configuration

 

 

 

DigiRail Configuration is done via the RS485 interface by using Modbus RTU commands.

The DigiConfig software supplied FREE allows for configuration of all DigiRail features as well as complete calibration and diagnosis.

It automatically detects active devices in the Modbus network and permits configuration of all parameters.

Converter Models

 
USB-i485

User Manual >>

 

 

 

The USB-i485 module is a cost-effective way to convert RS485 or RS422 industrial buses to a USB interface. When connected to a PC USB port the USB-i485 module is automatically detected and is installed as a native COM port which is compatible with any existing serial communication application.

Muliple modules can be installed when using USB hubs thus allowing a hassle-free configuration of a multi serial system without any IRQ or DMA configuration.

1500 Vdc isolation between the USB port and RS485/RS422 protects the PC from spykes or possible misconnections in the communication bus

Software

 
SuperView

Superview is a Supervisory Control and Data Acquisition (SCADA) software package for use with DigiRailnetworked devices. Ideally suited for smaller scale SCADA applications, where ease-of-use and speed of development are important factors. The user can create windows with images of the process and freely insert dynamic objects such as text, buttons, chart displays, etc. Additional features include data logging with historic data recall, event logs, alarm monitoring and e-mail sending. Supplied with ready-to-run templates for DigiRail and FieldLogger I/O. More Information >>

 

 

DAQFactory

Control and monitoring software DAQFactory can now be used with DigiRail with version that have the connectivity pack. DAQFactory can be used to create an opertor interface, with plant mimics, chart recorders, provide automatic control, PID loops, alarms and datalogging and reporting functions.

 

Phone +44(0)115 925 8412 | Fax +44(0)115 925 9757