Process control instruments with web interface

Paul Boughton
Vishay Intertechnology is enhancing the Vishay Systems family of G4 advanced process control instruments by introducing remote access via a web interface. Setup, maintenance, diagnostic tests, software updates and other activities can be carried out using a standard web browser.
The remote access feature enables plant maintenance engineers (or Vishay engineers, if permitted) to access G4 instruments anywhere. Whether the product or system is a tank or crane, an advanced process control system or level measurement system, it can be accessed anytime from any location with web access. By logging onto the G4 instrument, users can make changes to settings, monitor weighing signals, download software and perform other important tasks. Weighing signals such as mV/V and actual weight can also be monitored. This gives users an easy platform from which to operate, monitor and maintain the instrument. Embedded security tools protect the system from erroneous or malicious access to ensure system and data integrity.
G4 instruments have four base mounting options: DIN rail, panel, desktop and harsh environment. The G4-RM DIN rail-mount model has up to six weighing/force measurement channels per unit. It is sealed to IP20 and operates with a power supply of 24V DC. The G4-PM panel mount, G4-DT desktop and G4-HE harsh environment models have up to eight weighing/force measurement channels per unit. They are IP65-rated and can be configured for either 24V DC or 115/230V AC operation.
All G4 models feature flexible configuration, synchronised sampling of all channels, a fast update rate of up to 800 updates per second, integrated and flexible digital I/O, easy parameter backup and restoration via a USB port or internal memory, and communication via Ethernet, Profibus, Devicenet, Modbus, USB, RS485, RS232 and Modbus/TCP.
Applications include process weighing and control, force measurement, web tension measurement and control, automation, force vector calculations, high-dynamic force measurement and high-speed batching/blending systems.
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