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USB-1208FS-Plus-OEM

Analog and Digital I/O

Trademark and Copyright Information

User's Guide

January 2019. Rev 3
© Measurement Computing Corporation

Содержание USB-1208FS-Plus-OEM

Страница 1: ...USB 1208FS Plus OEM Analog and Digital I O Trademark and Copyright Information User s Guide January 2019 Rev 3 Measurement Computing Corporation...

Страница 2: ...y any means electronic mechanical by photocopying recording or otherwise without the prior written permission of Measurement Computing Corporation Notice Measurement Computing Corporation does not aut...

Страница 3: ...input acquisition modes 8 Software paced 8 Hardware paced 8 Board components 9 USB connector 9 LED 9 Header connectors 9 Differential mode pinout 10 Single ended mode pinout 10 Signal connections 11 A...

Страница 4: ...USB 1208FS Plus OEM User s Guide 4 Microcontroller 23 Power 23 General 24 Environmental 24 Mechanical 24 Signal connector 24 Differential mode signals 25 Single ended mode signals 25...

Страница 5: ...creen 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 information Additio...

Страница 6: ...ns The USB 1208FS Plus OEM device is compatible with both USB 1 1 and USB 2 0 ports The speed of the device may be limited when using a USB 1 1 port due to the difference in transfer rates on the USB...

Страница 7: ...he computer running Windows connect the USB cable to an available USB port on the computer or to an external USB hub connected to the computer Connect the other end of the cable to the USB connector o...

Страница 8: ...Plus OEM can acquire data from up to eight channels using hardware paced mode The analog data is acquired and converted to digital values until you stop the scan Data is transferred in blocks of 32 s...

Страница 9: ...LED LED state Indication Steady green The device is connected to a computer or external USB hub Blinks continuously Data is being transferred Header connectors The header connectors provide the follo...

Страница 10: ...Trigger input 38 Port B6 Port B bit 6 19 SYNC Synchronization I O 39 Port B7 Port B bit 7 20 CTR Counter input 40 GND Ground USB connector Single ended mode pinout Eight channel single ended mode pino...

Страница 11: ...or differential input mode the input signal is measured with respect to the low input and delivered through three wires Connect the wire carrying the signal to be measured to CH IN HI Connect the wire...

Страница 12: ...tisfy the 10 V to 20 V input requirement see Figure 4 Figure 4 Differential voltage example common mode voltage of 11 V If you decrease the common mode voltage to 7 V the differential stays at 8 V How...

Страница 13: ...sample is acquired This sequence continues until all elements in the gain queue have been selected When the end of the channel list is detected the sequence returns to the first element in the list T...

Страница 14: ...tion The discharge of static electricity can damage some electronic components Before removing the USB 1208FS Plus OEM from its housing ground yourself using a wrist strap or touch the computer chassi...

Страница 15: ...lock For more information about synchronized operations see page 18 Power output The VO connection draws power from the USB connector on the computer Caution The VO terminal is an output Do not connec...

Страница 16: ...measured at mid scale Ideally a zero volt input should produce an output code of 2048 Any deviation from this is an offset error Figure 10 shows an example of a transfer function with a 9 77 mV offset...

Страница 17: ...10 V range this would yield 10 V 0 002 20 mV This means that at full scale and neglecting the effect of offset the measurement would be within 20 mV of the actual value Note that gain error is express...

Страница 18: ...uter draws 100 mA of current from the USB 5V supply When running applications the current that can be drawn from all device connections analog digital SYNC and VO output loading is 500 mA The maximum...

Страница 19: ...0 V G 20 Software selectable Throughput Note 2 Software paced 250 S s typ PC dependent Continuous scan 0 014 S s to 50 kS s Channel gain queue Software selectable 8 elements in SE mode 4 elements in D...

Страница 20: ...9 766 10 V 0 2 20 9 766 29 766 5 V 0 2 10 9 766 19 766 4 V 0 2 8 9 766 17 766 2 5 V 0 2 5 9 766 14 766 2 V 0 2 4 9 766 13 766 1 25 V 0 2 2 5 9 766 12 266 1 V 0 2 2 9 766 11 766 Table 5 Accuracy compon...

Страница 21: ...e error producing a dead band digital input code region In this case changes in digital input code at values less than 0x040 may not produce a corresponding change in the output voltage The offset err...

Страница 22: ...ute min 0 V recommended min External clock input output Table 13 External clock I O specifications Parameter Condition Specification Terminal name SYNC Terminal type Bidirectional Direction software s...

Страница 23: ...Input high voltage limit 5 5 V absolute max Input low voltage threshold 1 42 V typ 1 0 V min 2 0 V max Input low voltage limit 0 5 V absolute min 0 V recommended min Memory Table 15 Memory specificati...

Страница 24: ...er Specification Operating temperature range 0 C to 70 C Storage temperature range 40 C to 70 C Humidity 0 to 90 non condensing Mechanical Table 20 Mechanical specifications Parameter Specification Di...

Страница 25: ...5 18 TRIG_IN Trigger input 38 Port B6 Port B bit 6 19 SYNC Synchronization I O 39 Port B7 Port B bit 7 20 CTR Counter input 40 GND Ground Single ended mode signals Table 23 8 channel single ended mode...

Страница 26: ...ion 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 com debrecen E mail...