Measurement Computing USB-1408FS-Plus-OEM, User Manual, Page: 18 / 26

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Page: 18 / 26

Measurement Computing USB-1408FS-Plus-OEM User Manual Download Page 18

USB-1408FS-Plus-OEM User's Guide

Functional Details

18

Power

Connecting the device to a computer 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 output current that is available at the +VO power output terminal is
100 mA.

With all outputs at their maximum output current, the USB-1408FS-Plus-OEM in a fully-loaded configuration
may be above that allowed by the computer. In this case, determine the per-pin loading in the application to
ensure that the maximum loading criteria is met. The per-pin loading is calculated by di5V by the load
impedance of the pin in question.

Mechanical drawings

Figure 13. Circuit board dimensions

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Summary of Contents for USB-1408FS-Plus-OEM

Page 1: ...USB 1408FS Plus OEM Analog and Digital I O Document Revision 2A January 2015 Copyright 2015 User s Guide...

Page 2: ...d 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 Corporati...

Page 3: ...Chapter 3 Functional Details 8 Analog 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...

Page 4: ...USB 1408FS Plus OEM User s Guide 4 Memory 23 Microcontroller 23 Power 23 General 24 Environmental 24 Mechanical 24 Header connector 24 Differential mode 25 Single ended mode 25...

Page 5: ...e names of 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...

Page 6: ...ns The USB 1408FS 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...

Page 7: ...ble USB port on the 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 th...

Page 8: ...408FS 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 13: ...Element Channel Range Gain 0 CH0 BIP10V 2 1 CH1 BIP20V 1 2 CH3 BIP4V 5 When a scan begins with the gain queue enabled the device reads the first element sets the appropriate channel number range and...

Page 14: ...device housing to access the jumper on the circuit board Complete the following steps to set the jumper for pull up or pull down 1 Unplug the device from the computer 2 Turn the device over and rest t...

Page 15: ...ersions on a second device and acquire data from 16 channels using one clock For more information about synchronized operations see page 17 Power output The VO connection draws power from the USB conn...

Page 16: ...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 error Offset error affects all codes equally by shifting the entire tran...

Page 17: ...e standpoint than are values near mid scale which see little or no voltage error Combining these two error sources in Figure 12 we have a plot of the error band for the 10 V range This is a graphical...

Page 18: ...mum output current that is available at the VO power output terminal is 100 mA With all outputs at their maximum output current the USB 1408FS Plus OEM in a fully loaded configuration may be above tha...

Page 19: ...typ PC dependent Continuous scan 0 014 S s to 48 kS s Channel gain queue Software selectable 8 elements in SE mode 4 elements in DIFF mode One gain element per channel Elements must be unique and lis...

Page 20: ...st significant bitroot mean square LSBrms 20 V 8 1 21 10 V 8 1 21 5 V 9 1 36 4 V 10 1 51 2 5 V 12 1 81 2 V 14 2 12 1 25 V 18 2 72 1 V 22 3 33 Table 5 Noise performance single ended mode Range Typical...

Page 21: ...ed at code 0x040 Digital input output Table 9 Digital I O specifications Parameter Specification Digital type CMOS Number of I O 16 Port A0 through A7 Port B0 through B7 Configuration 2 banks of 8 Por...

Page 22: ...nded min External clock input output Table 11 External clock I O specifications Parameter Condition Specification Terminal name SYNC Terminal type Bidirectional Direction software selectable Output Ou...

Page 23: ...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 13 Memory specifications Parameter Specificat...

Page 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 18 Mechanical specifications Parameter Specification Di...

Page 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 Table 21 8 channel single ended mode Pin Sig...

Page 26: ...ion 10 Commerce Way Norton Massachusetts 02766 508 946 5100 Fax 508 946 9500 E mail info mccdaq com www mccdaq com NI Hungary Kft H 4031 Debrecen H tar t 1 A Hungary Phone 36 52 515400 Fax 36 52 51541...

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