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Features & specifications Features : Optically isolated from computer. 16 optically isolated digital connections. 9 analogue outputs, of which one is high precision and 4 analogue inputs. A simple way of controlling using Turbo Pascal, Turbo C, Qbasic, Visual Basic. Printer bypass connector on board.
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Assembly hints 1. Assembly (Skipping this can lead to troubles ! ) Ok, so we have your attention. These hints will help you to make this project successful. Read them carefully. 1.1 Make sure you have the right tools: • A good quality soldering iron (25-40W) with a small tip.
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Assembly hints ⇒ Use the check-boxes to mark your progress. ⇒ Please read the included information on safety and customer service * Typographical inaccuracies excluded. Always look for possible last minute manual updates, indicated as ‘NOTE’ on a separate leaflet. 1.3 Soldering Hints : 1- Mount the component against the PCB sur- face and carefully solder the leads...
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Construction Mount the components in the order indicated in the separate part list. The parts marked with (!) require special attention in the assembly instructions. IMPORTANT : Read the disk file READ.ME before commencing assembly. This file will report any updated changes. ATTENTION :If the card is to built as an expansion card (Slave) to one already connected tot the computer (Master), the components marked with S should not be mounted.
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Construction 19. Transformers 220V TRANSFORMER TRANSFO 1 : 1 X 15V (2X7,5V) TRANSFO 2 : 1 X 6V (S) 20. IC’s. check the position ! IC1 : 4N33 ! IC9 : 4N33 ! IC2 : 4N33 ! IC10 : 4N33 ! IC3 : 4N33 ! IC11 : 4N33 ! IC4 : 4N33 !
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Information 21. Information If desired, a voltage divider or filter can be fitted on each analogue input. The voltage divider can be useful if a higher input voltage than normal is to be monitored. Normally only a maximum of 5V can be accepted by the input. The filter can be useful for eliminat- ing (mains) hum from the signal for example.
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Connection numbering Conversion of current to voltage. In order to avoid interruptions, it is possible for a variable current to be measured as the reference input value which is used for current to voltage conversion. Here a variable current from 4 to 20 mA is converted to a voltage of 0.8 to 4V.
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Test & connection 23. Test and Connection TEST Prior to testing the card by computer a number of "passive" tests can be done. Connect the connectors, MAINS N and L to the supply voltage. Normally no LEDs should light up. Measure the voltage on testpin +5V to see if the 5V supply voltage is present.
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