G4 Multi Channel Weighing Instrument. PM/DT/HE Technical Manual

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Technical ManualPRECAUTIONSREAD this manual BEFORE operating or servicing this instrument.FOLLOW these instructions carefully.SAVE this manual for future reference.!WARNINGOnly permit qualified personnel to install and service this instrument.Exercise care when making checks, tests and adjustmentsthat must be made with power on.Failing to observe these precautions can result in bodily harm.DO NOT allow untrained personnel to operate,clean, inspect, maintain, service, or tamper withthis instrument.
G4 Multi Channel Weighing Instrument1. IntroductionGeneralThe G4 Instrument is a high performance multi channel weight indicator intended forindustrial systems.Its basic function is to convert the signals from strain gauge transducers to usefulweight information. Transducer excitation is included as well as parameter controlledsignal processing, indication of output levels, error supervision and operation ofoptional external equipment. The instrument can be equipped with up to 8synchronized weighing channels.The instrument is modular and can be equipped with different types of I/O units tomatch the demands in the specific applications. There are strain gauge transducerinterface modules, a digital input/output module, and analog output modules.Internal solid-state outputs in the instrument can be used for output functions from levelsupervision, setpoints, etc. or ‘In process’ indication, reporting the operating status ofthe G4 Instrument.The CPU unit in the instrument has several communication interfaces. It has two serialcommunication ports, an Ethernet port, an USB port and a fieldbus slot.Several G4 Instruments can be controlled from a master computer or PLC.Serial communication interfaces are RS-485 and RS-232 using Modbus RTU protocol.The Ethernet interface is using Modbus TCP and the optional fieldbus interface usesProfibus or DeviceNet.It is possible to load new software into the instrument using the USB port.All functions in the G4 Instrument are controlled by set-up parameters. Setting ofparameter values can be performed with keys and/or graphical touch display on thefront panel.24 V DC or 110/230 V AC powers the G4 Instrument. All input and output signalsare galvanically isolated from the power supply by operational insulation.Enclosure & mounting accessoriesOperator panelGraphic colordisplay withtouch interfaceKeypadunitBackplaneCPUunitI/Ounit1I/Ounit2I/Ounit3I/Ounit4I/Ounit5I/Ounit6PowersupplyunitBlock structure of a G4 Instrument1-1
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Publication 600 852 R2© Vishay Nob
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