Webserver WS10 Module
The WebServer WS10 is a device for data acquisition, logging and transmission. It is capable of integrating instruments and sensors to the Internet, ethernet and wireless. The inputs for data acquisition can be either the built-in analog and digital inputs or any inputs from the external equipments connected to the WS10 through the RS485 interface (Modbus protocol). Data transfer can be accomplished through the ethernet interface or modem (mobile or conventional) using ordinary Internet resources, such as the internet browser, e-mail and TCP connection.

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Features of the Webserver WS10
Features include-

• Internal memory for off-line data logging (16 bit CPU, with 512KB RAM)




• 2 Serial Interfaces (RS232, RS485 or Modem)




• Ethernet 10BaseT Interface. It suports TCP/IP, PPP (client and server), HTTP, FTP, SMTP, DHCP, Modbus TCP, Modbus RTU protocols




• Mobile wireless networks (GSM GPRS or CDMA 1XRTT)
  email in case of alarm




• Four inputs, configurable as:
  o Digital inputs for counting voltage pulses or dry contacts, with totalizer for flow measurements.
  o 0- 5V , 0-20mA or 4-20mA analogue inputs




• Resolution: 1024 levels(10 bits) for 0-5V and 0-20mA




• Analogue/Digital Expansion via External Units. Connect any Modbus compatiable I/O unit such as our Digirail units
  

• 800 levels for 4-20mA.




• Accuracy: better than 0,3% of input full scale range.




• Input impedance: >1M Ohms for 0-5V, 230 Ohms for current.




• Pull-up resistor for digital inputs: 10KOhms / +5V.




• Possible input types combination:
  o 4 digital inputs
  o 1 analogue and 3 digital inputs
  o 2 analogue and 2 digital inputs
  o 4 analogue inputs




• 2 Relays Output




• Ambient conditions: 0 a 55°C, 35% to 85% Relative Humidity, non condensing




• ABS Housing for DIN Rail 35mm.




• Dimension: 105x90x60mm




• SMPS 85 to 264Vca / 50-60Hz / 4VA max.



 

Data Acquisition with the WS10
The WS10 gets data from the system or process through:

• 4 built-in signal inputs
• RS232 or RS485 serial communication interface

Data acquisition over the RS485 communication interface uses the Modbus RTU protocol. The WS10 acts as a master, polling the Modbus network nodes to get the specified data to its memory. All the data acquired from its local inputs and from external Modbus devices are stored on the WS10 memory. The user can assign identifiers for each memory position. On the configurations of the data access functions, all registers are referenced by their names.


    
Data Logging
The WS10 can be configures to periodically log the values of a group of registers on its Flash memory. This historical logging can be sent out by e-mail or directly to a computer. This function allows the WS10 to act as a Data Logger for the variables read from the equipments in the Modbus network or from its built-in signal inputs. On a remote supervision system, this function enables the WS10 to monitor the process and send the acquired data periodically or when the communication link is established.

Remote Data Access
The instantaneous and historical values acquired from the system or process can be accessed by different physical ways:
• Ethernet interface;
• RS232, RS485 serial interface or Modem (conventional or mobile).
The WS10 offers five basic applications for remote data access of its registers.
• WebServer;
• Modbus TCP or Modbus RTU;
• Alarm conditions supervision;
• E-mail transmission;
• Periodical data transmission.
The WS10´s multi-task operating system allows for the simultaneous utilization of all these applications
 

Web Browser
The user can view data acquired by the WS10 in dynamic user-created HTML pages. These pages can be viewes by any computer using a Internet browser (Netscape, Internet Explorer, FireFox etc).
The WS10, connected to the company’s intranet by its Ethernet interface, shares the information (application data) to any computer connected to the intranet, allowing both readings and writings of data, with or without password authorization. In a remote application, a WS10 connected to a conventional or mobile modem can answer a "dial-up" call connection and present a supervision page to the internet browser of the computer that originated the call, allowing the supervision of remote units.
Have a look at a WS10 monitoring the weather in Brazil
  

Local Operation
Connected to a local network, WS10 can bridge a ModbusRTU network to existing SCADA using Ethernet, expanding data accessibility to virtually all networked computers using internet browser. WS10 can also log historical data, monitor alarm conditions and send e-mail messages in periodical or exception basis. WS10 is an alternative to SCADA in small applications. When the network connection to the internet is properly configured, WS10 data can be accessed from external locations, both by SCADA systems and browsers. The following figure shows WS10 in local application.

Remote Operation
Installed on a remote site, WS10 can connect through a modem to a modem or cellular phone line. Using this connection, WS10 can access internet and send e-mail messages on abnormal conditions or periodically. WS10 can also transfer historical data to a networked computer. Its ability to answer data calls allows dial-up access using SCADA or browser. Remotely installed, WS10 allows additions functionalities when compared to conventional remote units that can only transfer data periodically. The following figure shows WS10 in a remote application.

Purchasing
All prices are in Australian Dollars. Prices do not include GST (Goods and Services Tax). 10% GST applies to goods delivered in Australia. Australian GST is not paid on shipments despatched to an international destination. You can check the exchange rate by going to http://www.x-rates.com