Measurement Computing us-1208fs User Manual Download Page 8 | Manualshive

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Measurement Computing us-1208fs User Manual Download Page 8

USB-1208FS User's Guide

Installing the USB-1208FS

8

If the LED turns off

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

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Summary of Contents for us-1208fs

Page 1: ...USB 1208FS Analog and Digital I O Document Revision 10A July 2014 Copyright 2014 User s Guide...

Page 2: ...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 Corporation...

Page 3: ...ng the hardware 7 Chapter 3 Functional Details 9 Analog input acquisition modes 9 Software paced 9 Hardware paced 9 External components 10 USB connector 10 LED 10 Screw terminals 10 Signal connections...

Page 4: ...USB 1208FS User s Guide 4 Power 25 General 25 Environmental 25 Mechanical 25 Screw terminal connector 26 Differential mode pinout 26 Single ended mode pinout 27 Declaration of Conformity 28...

Page 5: ...ers 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 check boxes italic text Italic text is used for the names...

Page 6: ...dependently selectable as input or output in two 8 bit ports 32 bit event counter input for counting TTL pulses External digital trigger input Bidirectional terminal for external clocking or multi uni...

Page 7: ...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 section on our web site a...

Page 8: ...If the LED turns off If communication is lost between the device and the computer the LED turns off To restore communication disconnect the USB cable from the computer and then reconnect it This shou...

Page 9: ...quire 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 31 samples from the...

Page 10: ...USB 1208FS is connected to a computer or external USB hub Blinks continuously Data is being transferred Screw terminals The screw terminals provide the following connections Eight analog inputs CH0 IN...

Page 11: ...t The differential mode pinout is shown in Figure 4 Figure 4 Differential mode pinout Signal connections Analog input You can connect up to eight single ended analog input connections to CH0 IN throug...

Page 12: ...to CH IN HI Connect the wire carrying the reference signal to CH IN LO Connect the third wire to GND A low noise precision programmable gain amplifier PGA is available on differential channels to pro...

Page 13: ...to ground all ranges except 20V can realize a linear output for any differential signal with zero common mode voltage and full scale signal inputs The 20 V range is the exception You cannot put 20 V o...

Page 14: ...uce a long recovery time due to saturation of the input channel Analog output You can connect up to two analog output connections to D A OUT 0 and D A OUT 1 Each channel can be paced individually at r...

Page 15: ...efully remove the top section of the case to expose the circuit board The user configurable jumpers are labeled DIO A and DIO B Figure 9 shows the location of the each jumper on the circuit board Figu...

Page 16: ...raw of the PC platform 500 mA for desktop PCs and self powered hubs or 100 mA for bus powered hubs and notebook computers With all outputs at their maximum output current you can calculate the total c...

Page 17: ...from this is an offset error Figure 12 shows the USB 1208FS transfer function with an offset error The typical offset error specification on the 10 V range is 9 77 mV Offset error affects all codes eq...

Page 18: ...le which see little or no voltage error Combining these two error sources in Figure 14 we have a plot of the error band of the USB 1208FS for the 10 V range This is a graphical version of the typical...

Page 19: ...USB 1208FS User s Guide Functional Details 19 Mechanical drawings Figure 15 Circuit board top and enclosure dimensions...

Page 20: ...selectable 20 V G 1 10 V G 2 5 V G 4 4 V G 5 2 5 V G 8 2 0 V G 10 1 25 V G 16 1 0 V G 20 Throughput Note 2 Software paced 250 S s typ PC dependent Hardware paced 50 kS s Channel gain queue Up to 16 e...

Page 21: ...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 components sin...

Page 22: ...FS mV 0 V to 4 096 V 0 1 typ 0 9 max 4 0 typ 36 0 max 1 0 typ 9 0 max 4 0 typ 45 0 max Note 5 Negative offsets will result in a fixed zero scale error or dead band At the maximum offset of 9 mV any i...

Page 23: ...mended min External clock input output Table 13 External clock I O specifications Parameter Conditions Specification Pin name SYNC Pin type Bidirectional Direction software selectable Output Outputs i...

Page 24: ...ax Input high voltage threshold 2 43 V typ 1 9 V min 3 1V max 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 absol...

Page 25: ...provide up to 500 mA of current for a USB device Battery powered root port hubs provide 100 mA or 500 mA depending upon the manufacturer A laptop PC that is not connected to an external power adapter...

Page 26: ...mode pinout Pin Signal Name Pin Signal Name 1 CH0 IN HI 21 Port A0 2 CH0 IN LO 22 Port A1 3 AGND 23 Port A2 4 CH1 IN HI 24 Port A3 5 CH1 IN LO 25 Port A4 6 AGND 26 Port A5 7 CH2 IN HI 27 Port A6 8 CH2...

Page 27: ...2 CH1 IN 22 Port A1 3 AGND 23 Port A2 4 CH2 IN 24 Port A3 5 CH3 IN 25 Port A4 6 AGND 26 Port A5 7 CH4 IN 27 Port A6 8 CH5 IN 28 Port A7 9 AGND 29 GND 10 CH6 IN 30 PC 5V 11 CH7 IN 31 GND 12 AGND 32 Por...

Page 28: ...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...

Page 29: ...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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