Measurement Computing USB-1408FS User Manual Download Page 1 | Manualshive

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Summary of Contents for USB-1408FS

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Page 2: ...USB 1408FS USB based Analog and Digital I O Module User s Guide Document Revision 5 March 2008 Copyright 2008 Measurement Computing Corporation...

Page 3: ...ed with same or similar device or refunded at MCC s discretion For specific information please refer to the terms and conditions of sale Harsh Environment Warranty Program Any Measurement Computing pr...

Page 4: ...from its use No license is granted by implication or otherwise under any patent or copyrights of Measurement Computing Corporation All rights reserved No part of this publication may be reproduced sto...

Page 5: ...ter 3 Functional Details 14 Theory of operation analog input acquisition modes 14 Software paced mode 14 Continuous scan mode 14 External components 14 USB connector 15 LED 15 Screw terminal wiring 15...

Page 6: ...ide 6 Non volatile memory 30 Microcontroller 30 Power 30 General 30 Environmental 31 Mechanical 31 Main connector and pin out 31 4 channel differential mode 31 8 channel single ended mode 32 Declarati...

Page 7: ...or the names of manuals and help topic titles and to emphasize a word or phrase For example The InstaCal installation procedure is explained in the Quick Start Guide Never touch the exposed pins or ci...

Page 8: ...32 bit external event counter The analog inputs are software configurable for either eight 13 bit single ended inputs or four 14 bit differential inputs The 16 digital I O lines are independently sele...

Page 9: ...N Port A Port B 1 Analog Input 8 single ended 13 bit channels or 4 differential 14 bit channels 8 Analog Output 2 12 bit channels 2 Figure 2 USB 1408FS functional block diagram Software features For i...

Page 10: ...DIP switches to set or interrupts to configure You can connect the USB 1408FS before or after you install the software and without powering down your computer first When you connect an HID to your sy...

Page 11: ...gth Additional documentation In addition to this hardware user s guide you should also receive the Quick Start Guide available in PDF at www mccdaq com PDFmanuals DAQ Software Quick Start pdf This boo...

Page 12: ...om PDFmanuals DAQ Software Quick Start pdf Installing the hardware Be sure you are using the latest system software Before you install your USB 1408FS run Windows Update to update your operating syste...

Page 13: ...y to communicate with the USB 1408FS If the LED turns off If the LED is illuminated but then turns off the computer has lost communication with the USB 1408FS To restore communication disconnect the U...

Page 14: ...can acquire data from up to eight channels The analog data is continuously acquired and converted to digital values until you stop the scan Data is transferred in blocks of 31 samples from the USB 140...

Page 15: ...ter or external USB hub Blinks continuously Data is being transferred Screw terminal wiring The USB 1408FS has two rows of screw terminals one row on the top edge of the housing and one row on the bot...

Page 16: ...ort A7 28 Port B7 39 Port B6 38 Port B5 37 Port B4 36 Port B3 35 Port B2 34 Port B1 33 Port B0 32 Port A6 27 Port A5 26 Port A4 25 Port A3 24 Port A2 23 Port A1 22 Port A0 21 4 channel differential mo...

Page 17: ...N LO or CH3 IN LO The third wire connects to GND A low noise precision programmable gain amplifier PGA is available on differential channels to provide gains of up to 20 and a dynamic range of up to 1...

Page 18: ...ial stays at 8 V However the solution now violates the input range condition of 10 V to 20 V The voltage on each analog input now swings from 3V to 11V Voltages between 10 V and 3 V are resolved but t...

Page 19: ...p to 10 000 updates per second Both channels can be paced simultaneously using the same time base at 5000 updates per channel The 0 4 096 V output range provides a convenient 1 mV per LSB when setting...

Page 20: ...the USB based on the application and the allowed current draw 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...

Page 21: ...the Main connector and pin out diagrams on page 16 for the location of these pins Accuracy The overall accuracy of any instrument is limited by the error components within the system Quite often reso...

Page 22: ...des equally by shifting the entire transfer function up or down along the input voltage axis The accuracy plots in Figure 12 are drawn for clarity and are not drawn to scale 10V 10V Input Voltage 0 16...

Page 23: ...ement would be within 2 mV of the actual value Note that gain error is expressed as a ratio Values near FS are more affected from an absolute voltage standpoint than are values near mid scale which se...

Page 24: ...scale reading It can also introduce a long recovery time from saturation which can affect the next measurement in the queue Synchronizing multiple units You can connect the SYNC pin of two USB 1408FS...

Page 25: ...that use the EXTCLOCK option An example of a master slave configuration is shown here Slave PMD 1608FS Master USB 1408FS Slave USB 1408FS SYNC pin pin 19 For the slave USB 1408FS Set the Universal Lib...

Page 26: ...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 Software selectable Throughput Note 2 Software paced 250 samples per second S s typ PC dependent Continuous scan 48 kilosamples pe...

Page 27: ...e USB 1408FS intermediate input ranges Table 2 Accuracy differential mode Range Absolute Accuracy 25 C mV Absolute Accuracy 0 to 50 C mV 20 V 10 98 49 08 10 V 7 32 33 42 5 V 3 66 20 76 4 V 2 92 19 02...

Page 28: ...nalog output accuracy components Range of FSR Gain Error at FS mV Offset mV Note 6 Accuracy at FS mV 0 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 6 Zero scale of...

Page 29: ...ck from external source Input clock rate 48 KHz maximum Clock pulse width Input mode 1 s min Output mode 5 s min Input leakage current Input mode 1 0 A Input high voltage 4 0 V min 5 5 V absolute max...

Page 30: ...urrent requirement for the USB 1408FS which includes up to 10 mA for the status LED Note 11 Self powered hub refers to a USB hub with an external power supply Self powered hubs allow a connected USB d...

Page 31: ...and pin out Table 19 Main connector specifications Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG 4 channel differential mode Pin Signal Name Pin Signal Name 1 CH0 IN HI 21 Port A0 2...

Page 32: ...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 Port B0 13 D A OUT 0 33 P...

Page 33: ...ompatibility EN 61326 1997 Amendment 1 1998 Emissions Group 1 Class A EN 55011 1990 CISPR 11 Radiated and Conducted emissions Immunity EN61326 Annex A IEC 61000 4 2 1995 Electrostatic Discharge immuni...

Page 34: ...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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