HART USB Interface with Galvanic Decoupling

article number14300-0102
interfaceUSB
controllerCY7C68014A
modem chipDS8500
connector2-pole current terminal
length USB cableabout 1.5 m
length HART cableabout 1.5 m
operationup to 16 interface modules in parallel mode
power supplyvia USB
galvanic decouplingyes
transmission rate1200 Bit/s (600 Bit/s optionally)
driver softwareWindows XP, Vista, 7, 8, 10
RoHs2-conformyes
delivery contenthardware, driver, HART Starter pack, documentation German and English on USB stick
compatible withHFC OPC Server (HART Communication Foundation), Simatic PDM (all versions), FDT frame applications
available softwareisH@RT Device DTM, isHRT CommDTM (FDT 1.2.1)

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The interface isHRT USB is designed to provide a communication link between a desktop computer or PC notebook and the HART field device. The PC can be taken into the field and connected with the HART network within seconds thanks to the USB plug & play features. Mobile data acquisition, as well as parameterization and diagnosis, are preferred operational areas. The isHRT USB is connected to the HART line by 2 clamps which are the polarity insensitive and provide galvanic decoupling between HART line and PC.

The interface contains a HART master stack, that is completely executed on the microcontroller inside the interface. This microcontroller carries all tasks related to HART communication like telegram retries in case of communication errors or compliance with timing requirements of the HART protocol. This gives an advantage when using a primary and a secondary HART masters simultaneously or when using a HART slave running in Burst mode. The HART master stack can run as primary master as well as the secondary master.

Additionally, the interface can work like a serial modem under Windows XP, 7 and 8. Therefore it offers a serial COM-port so that already existing applications can be used without any changes. So the isHRT USB is compatible with existing HART software e.g. the HCF OPC server of the HART Communication Foundation.

The driver software also contains the isHRT CommDTM, a Communication DTM for use of the interface in FDT frame applications. Furthermore for integration into customer applications header files and examples in C/C++ source code are available.

Installation Notes with a 24V Power Source

  • connect the HART transmitter to a 24V power source
  • put a 240 Ohm resistor in series
  • install the HART driver software from the CD of the isHRT USB delivery package
  • attach the isHRT USB to the PC
  • connect the clamps of the isHRT USB to the HART loop
  • in the settings of your HART application software set the HART master mode to primary master

Installation Notes with a PLC (Siemens, ABB, GE)

  • connect the HART transmitter to the PLC (eg. Siemens-S7, ABB…)
  • install the HART driver software from the CD of the isHRT USB delivery package
  • attach the isHRT USB to the PC
  • connect the clamps of the isHRT USB to the HART loop
  • in the settings of your HART application software set the HART master mode to secondary master