Measurement-computing PC104-DI48 Manuel d'utilisateur

PC104-DI48User’s ManualRevision 3September, 2000

5.0 DATA REGISTERSEach PC104-DI48 is composed of parallel input chips. Each address has one inputbuffer that senses eight input pins. The ports are

6.0 SPECIFICATIONSPOWER CONSUMPTION+5V Supply 250 mA typical / 325 mA max.+12V Supply None.−12V Supply None.DIGITAL INPUTDigital Type Input: 74LS373C

7.0 ELECTRONICS AND INTERFACINGThis short introduction to the electronics, most often needed by digital I/O boardusers, covers a few key concepts.7.1

7.2 TTL TO SOLID STATE RELAYSMany applications require digital inputs monitor AC and DC voltages. High AC andDC voltages cannot be applied directly b

Digital inputs often require the use of voltage dividers. For example, if you wish tomeasure a digital signal that is at 0 volts when off and 24 volts

EC Declaration of ConformityWe, Measurement Computing Corp., declare under sole responsibility that the product:Digital input boardPC104-DI48Descripti

Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton, Massachusetts 02766 (508) 946-5100 Fax: (508) 946-9500 E-mail: [email protected]

Your new Measurement Computing product comes with a fantastic extra — Management committed to your satisfaction! Thank you for choosing a Measurement

107.4 LOW PASS FILTERS DE-BOUNCE INPUTS ...97.3 VOLTAGE DIVIDERS ...97.2 TTL TO SOLID STATE RELAYS ...

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1.0 INTRODUCTIONThe PC104-DI48 is designed to have the best quality and lowest cost of any digitalinput board.The PC104-DI48 conforms to the connector

3.0 HARDWARE INSTALLATION3.1 BOARD SETUP The PC104-DI48 is setup at the factory with BASE ADDRESS= 300h (768 decimal).Open your PC (after turning of

Table 3-1. I/O AddressesSERIAL PORT3F8-3FFEGA2B0-2BFFLOPPY DISK3F0-3F7PARALLEL PRINTER270-27FSERIAL PORT3E8-3EFALT BUS MOUSE23C-23FCGA3D0-3DFBUS MOUSE

4.0 CABLING 4.1 INTRODUCTIONThe PC104-DI48 connector is a standard 50 pin header connector (Figure 4-2). Acable with mating connectors (C50FF-#) can

Figure 4-2. Base Address Switches and Pin 1 Locations5