Modbus communication card

November 2001 System Integration & Control Systems Design

Combining Modbus communication with the PAX series of panel meters enables a panel meter to display values, setpoints and reset values stored within the PAX meter which can now be accessed via RS485 Modbus protocol. This capability, along with the wide range of inputs and features offered by the PAX series, provides a powerful solution for industrial panel meter networking applications.

The RS485 Modbus card is capable of transmitting in either the RTU or ASCII modes. Communications set-up is easy with two banks of DIP switches located on the plug-in board, which allows programming of the address, data format and baud rates up to 38,4 K.

The PAX series offers input for both analog and digital applications. The analog inputs include voltage, current, process, resistance, temperature and strain gauge, while the digital inputs cover count and rate applications. Now, with the new Modbus card, any of these parameters can not only be monitored at the machine, but the information can now be transmitted for higher level monitoring and process control.

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