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USB-1608FS User's Guide 

If the LED turns off 

If communication is lost between the device and the computer, the device LED turns off. Disconnect the USB 
cable from the computer and then reconnect it. This should restore communication, and the LED should turn on. 

Calibrating the hardware 

You can calibrate the USB-1608FS with InstaCal. Perform calibration whenever the ambient temperature 
changes by more than ±10 °C from the last calibration. 

The Measurement Computing Manufacturing Test department performs the initial factory calibration. Contact 
Measurement Computing if you want to have the factory calibration coefficients restored. 

Содержание USB-1608FS

Страница 1: ...USB 1608FS Analog Input and Digital I O Document Revision 7A January 2014 Copyright 2014 User s Guide...

Страница 2: ...any form by any means electronic mechanical by photocopying recording or otherwise without the prior written permission of Measurement Computing Corporation Notice Measurement Computing Corporation d...

Страница 3: ...hardware 7 Calibrating the hardware 8 Chapter 3 Functional Details 9 Analog input acquisition modes 9 Software paced 9 Hardware paced 9 BURSTIO 9 External components 10 USB connector 10 LED 10 Screw...

Страница 4: ...USB 1608FS User s Guide 4 Microcontroller 22 Power 23 General 23 Environmental 23 Mechanical 23 Screw terminal connector and pinout 23 Declaration of Conformity 25...

Страница 5: ...information to help you avoid injuring yourself and others damaging your hardware or losing your data bold text Bold text is used for the names of objects on a screen such as buttons text boxes and c...

Страница 6: ...digital trigger input Bidirectional external clock for synchronous operations with a second device Screw terminals for field wiring connections The device is powered by the 5V USB supply from the comp...

Страница 7: ...eaching Tech Support Fax 508 946 9500 to the attention of Tech Support Email techsupport mccdaq com For international customers contact your local distributor Refer to the International Distributors s...

Страница 8: ...ore communication and the LED should turn on Calibrating the hardware You can calibrate the USB 1608FS with InstaCal Perform calibration whenever the ambient temperature changes by more than 10 C from...

Страница 9: ...d by the number of channels with a maximum rate of 50 kS s for any channel Using this equation the USB 1608FS can acquire data from one channel at 50 kS s two channels at 50 kS s each four channels at...

Страница 10: ...r external USB hub Blinks once A USB command is received Blinks continuously Data is being transferred Blinks three times Initial communication is established between the USB 1608FS and the computer B...

Страница 11: ...are not using terminal 15 CH7 IN connect this terminal to terminal 16 AGND The analog input channels are configured for single ended input mode Each analog signal is referenced to signal ground AGND a...

Страница 12: ...n Figure 4 Figure 4 Schematic showing switch detection by digital channel DIO0 If you set the switch to the 5 V input DIO0 reads TRUE 1 When set to GND DIO0 reads FALSE 0 Pull up down configuration Bo...

Страница 13: ...to 1 MHz The internal counter increments when the TTL levels transition from low to high Trigger input The TRIG_IN terminal is an external digital trigger input The trigger mode is set for edge sensit...

Страница 14: ...current the total current requirement of the PC 5V terminal is calculated as follows Total current requirement USB 1608FS 150 mA 8 DIO 2 5 mA ea 170 mA The maximum available excess current is the diff...

Страница 15: ...function with an offset error The typical offset error specification for the USB 1608FS on the 10 V range is 1 66 mV Offset error affects all codes equally by shifting the entire transfer function up...

Страница 16: ...n 4 mV of the actual value Note that gain error is expressed as a ratio Values near FS 10 V are more affected from an absolute voltage standpoint than are values near mid scale which see little or no...

Страница 17: ...ock to the SYNC pin of a second device that is configured for A D pacer input Change to SYNC pin setting not implemented until first scan When you change the setting of the SYNC pin to input or to out...

Страница 18: ...USB 1608FS User s Guide 18 Mechanical drawings Figure 11 Circuit board top and enclosure dimensions...

Страница 19: ...0 kS s software selectable Throughput Software paced 500 S s all channels Hardware paced Note 1 100 kS s of channels 50 kS s max for any channel BURSTIO 32 768 total samples uses onboard FIFO 200 kS s...

Страница 20: ...12 Digital I O Table 5 Digital I O specifications Parameter Specification Digital type CMOS Number of I O 8 DIO0 through DIO7 Configuration Independently configured for input or output Pull up pull do...

Страница 21: ...V absolute min 0 V recommended min External clock input output Table 7 External clock I O specifications Parameter Condition Specification Pin name SYNC Pin type Bidirectional Direction software selec...

Страница 22: ...oltage 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 Maximum input frequency 1 MHz High pulse width 500 ns min Low pulse width 500 ns min Memo...

Страница 23: ...ovide 100 mA or 500 mA depending upon the manufacturer A laptop PC that is not connected to an external power adapter is an example of a battery powered root port hub If your laptop PC is constrained...

Страница 24: ...AGND 22 GND 3 CH1 IN 23 DIO1 4 AGND 24 GND 5 CH2 IN 25 DIO2 6 AGND 26 GND 7 CH3 IN 27 DIO3 8 AGND 28 GND 9 CH4 IN 29 DIO4 10 AGND 30 GND 11 CH5 IN 31 DIO5 12 AGND 32 GND 13 CH6 IN 33 DIO6 14 AGND 34...

Страница 25: ...eld immunity To maintain compliance to the standards of this declaration the following conditions must be met The host computer peripheral equipment power sources and expansion hardware must be CE com...

Страница 26: ...Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton Massachusetts 02766 508 946 5100 Fax 508 946 9500 E mail info mccdaq com www mccdaq com...

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