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Switch & Sense 8/8

USB-based Isolated Input and Relay Output

User's Guide

May 2021. Rev 8
© Measurement Computing Corporation

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Summary of Contents for Switch & Sense 8/8

Page 1: ...Switch Sense 8 8 USB based Isolated Input and Relay Output User s Guide May 2021 Rev 8 Measurement Computing Corporation...

Page 2: ...ed in any form by any means electronic mechanical by photocopying recording or otherwise without the prior written permission of Measurement Computing Corporation Notice Measurement Computing Corporat...

Page 3: ...Installing the hardware 7 Chapter 3 Functional Details 8 External components 8 Direct current dc power connector and 9 V power supply 8 External power LED 9 Status LED 9 USB connector 9 Internal compo...

Page 4: ...f objects on a screen such as buttons text boxes and check boxes italic text Italic text is used for the names of manuals and help topic titles and to emphasize a word or phrase Where to find more inf...

Page 5: ...1 ports and was tested for full compatibility with both USB 1 1 and USB 2 0 ports The Switch Sense 8 8 is supported under popular Microsoft Windows operating systems The Switch Sense 8 8 offers eight...

Page 6: ...tions are illustrated in the block diagram shown here Figure 1 Switch Sense 8 8 functional block diagram USB Controller Control Registers Control Bus FORM C Relay Outputs Control Relays 0 to 7 Differe...

Page 7: ...XTERNAL POWER LED illuminates green when 9 V power is supplied to the Switch Sense 8 8 If the voltage supply is less than 7 5 V or more than 20 V the LED does not light Installing the hardware Install...

Page 8: ...ble Figure 2 Switch Sense 8 8 external components rear view Direct current dc power connector and 9 V power supply The Switch Sense 8 8 requires between 7 5 V and 20 V of external power Your computer...

Page 9: ...ub Blinks continuously Data is being transferred Blinks three times Initial communication is established between the Switch Sense 8 8 and the computer USB connector The USB connector on the back of th...

Page 10: ...ct 4 C Relay 4 Common contact 0 NC Relay 0 Normally Closed contact 4 NC Relay 4 Normally Closed contact 1 NO Relay 1 Normally Open contact 5 NO Relay 5 Normally Open contact 1 C Relay 1 Common contact...

Page 11: ...losed NC contacts for relays 0 through 7 Form C relay output A schematic for Form C relay contacts is shown here The Form C relay has a C NO and NC contact Figure 4 Form C SPDT relay When a 0 is writt...

Page 12: ...olated digital input terminals IP0A to IP7B Connect up to eight isolated digital input signals using the following screw terminal pairs IP0A and IP0B IP4A and IP4B IP1A and IP1B IP5A and IP5B IP2A and...

Page 13: ...erminals When the relay is energized the relay 4 NO terminal connects the battery voltage to the input 4 terminal IP4B Figure 7 Simple battery to relay connection The figure below shows the schematic...

Page 14: ...e 9 shows the external resistor Rext The equation Rext 100 Vin 30 calculates the resistor value for a given Vin Make sure the external resistor is capable of handling the power generated by the input...

Page 15: ...120 volts AC VAC or 28 volts DC VDC resistive Contact resistance 100 milliohms m max Operate time 10 milliseconds ms max Release time 5 ms max Vibration 10 to 55 hertz Hz Dual amplitude 1 5 millimete...

Page 16: ...ut 1 terminal B IP5B Input 5 terminal B IP2A Input 2 terminal A IP6A Input 6 terminal A IP2B Input 2 terminal B IP6B Input 6 terminal B IP3A Input 3 terminal A IP7A Input 7 terminal A IP3B Input 3 ter...

Page 17: ...Computing Corporation NI Hungary Kft 10 Commerce Way H 4031 Debrecen H tar t 1 A Hungary Norton Massachusetts 02766 Phone 36 52 515400 508 946 5100 Fax 36 52 515414 Fax 508 946 9500 http hungary ni c...

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