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DI-500/510 Series and DI-750/760 Series Hardware Manual

Getting Started

9

Signal Cable and the Differential Amplifier

A quick rule-of-thumb: Any application requiring a differential amplifier also defines a need for quality signal cable. 
Four elements combine to ensure adequate quality signal cable: a twisted signal pair with low resistance stranded 
copper conductors; surrounded by a multiple-folded foil shield; with a copper stranded drain wire; all contained 
within an insulated outer jacket.

In applications where such signal cable is used, a dramatic decrease in noise pickup will be experienced.  The drain 
wire should be considered as the shield and should be connected as described in the section titled “Connecting a Dif-
ferential Amplifier” on page 7.
 Signal cable meeting all four criteria for quality is Belden No. 8641.

Labeling Analog Input Channels 

Depending on the number of analog input channels your instrument has, it may be necessary to label them. For exam-
ple, say you are using a DI-510-64 or a DI-760-64 to record 64 analog input channels and you want to record the sig-
nal connected to channel 28. Looking at the instrument, there are two groups, or “banks,” of 32 inputs. Each bank 
consists of channels 1 through 32 (64 total inputs). Since there are two channels labeled 28, how will you know which 
one will be recorded? A small box is provided on the instrument panel to label banks of channels and avoid this prob-
lem. In order for you and the software (either W

IN

D

AQ

 or the ActiveX Control Library) to tell these inputs apart, label 

each bank of 32 inputs with a letter according to the following table (an ordinary pencil is sufficient):

If you are using this instrument by itself (not multiplexed 
with other instruments):

…then write this letter in the box on the overlay:

DI-750-16

DI-500-16

not required

DI-750-32

DI-500-32

“A”

DI-760-32

DI-510-32

“A”

DI-760-48

DI-510-48

not required

DI-760-64

DI-510-64

“A” top 32 channels, “B” bottom 32 channels

,QVXODWHG2XWHU-DFNHW

)RLO6KLHOG

'UDLQ:LUH

7ZLVWHG6LJQDO3DLU

6WUDQGHG&RSSHU&RQGXFWRUV

Free Datasheet http://www.datasheet4u.com/

Содержание DI-500 Series

Страница 1: ...optical chemical manual or otherwise without expressed written authorization from the com pany The distribution of this material outside the company may occur only as authorized by the company in wri...

Страница 2: ...Free Datasheet http www datasheet4u com...

Страница 3: ...een repaired or altered by persons other than DATAQ Instru ments employees or products that have been subjected to misuse neglect improper installation or accident DATAQ Instruments shall have no liab...

Страница 4: ...Free Datasheet http www datasheet4u com...

Страница 5: ...Ground referenced Signal Sources 7 Signal Cable and the Differential Amplifier 9 Labeling Analog Input Channels 9 Increasing the Total Analog Input Channel Capacity 10 The DI 500 Series Instrument 12...

Страница 6: ...IPTION 28 Ordering Information 28 DI 5B35 Linearized 4 Wire RTD Input Modules 30 DESCRIPTION 30 Ordering Information 31 DI 5B36 Potentiometer Input Modules 32 DESCRIPTION 32 Ordering Information 32 DI...

Страница 7: ...o the DI 500 16 DI 500 32 DI 510 32 DI 510 48 DI 510 64 or any of the channel expansion instruments DI 750 Series applying to the DI 750 16 and DI 750 32 and DI 760 Series applying to the DI 760 32 DI...

Страница 8: ...Free Datasheet http www datasheet4u com...

Страница 9: ...I 760 48 16 signal conditioned channels and 32 high level channels DI 510 64 DI 760 64 64 high level channels Note all instruments are expandable to 240 channels All Analog Inputs Analog resolution 14...

Страница 10: ...h 64k samples Post trigger length 64k samples Trigger channel Any channel Trigger level hysteresis 8 bit 256 counts Power Requirements DI 500 and DI 750 Series instruments 700mA 12VDC typical excludin...

Страница 11: ...ide you through the appropri ate steps for replacing missing or damaged items Save the original packing material in the unlikely event that your unit must for any reason be sent back to DATAQ Instrume...

Страница 12: ...be used refer to the following pin out diagram for power requirements 3 Turn the POWER SWITCH to ON Connecting Your Signals On portable DI 500 510 Series instruments all analog input signal connection...

Страница 13: ...ltage between the high and low inputs Differential amplifiers have the advantage of reducing common mode voltages i e those appearing simultaneously and in phase on both inputs This capability may be...

Страница 14: ...causes current to flow through the shield and induces noise on the signal to be measured This problem is eliminated by ensuring that only one ground exists on the signal circuit 6LJQDO 6RXUFH LIIHUHQW...

Страница 15: ...necessary to label them For exam ple say you are using a DI 510 64 or a DI 760 64 to record 64 analog input channels and you want to record the sig nal connected to channel 28 Looking at the instrume...

Страница 16: ...struments are connected together one instrument becomes the master instrument and all others become slave instruments The master is always defined as the instrument connected directly to the PC A slav...

Страница 17: ...ill be recorded A small box is provided on the instrument panel to label banks of channels and avoid this problem In order for you and the software either WINDAQ or the ActiveX Control Library to tell...

Страница 18: ...ur input signal i e the output from a thermocouple strain gage LVDT etc so it becomes suitable for A D conversion by the DI 500 510 or DI 750 760 Series instrument When a DI 5B module is installed the...

Страница 19: ...alog input functions The expansion instruments in the DI 500 510 and DI 750 760 Series only have the POWER status lamp POWER SWITCH Controls power to the DI 500 510 and DI 750 760 Series instrument Re...

Страница 20: ...lly when you install any version of WINDAQ software and comes with its own built in documentation For non programmers or for those who want convenience DATAQ Instruments Inc provides WINDAQ software W...

Страница 21: ...or will blink in the Channels field on the status bar The currently active list of enabled channels are displayed in this field immediately to the left of the cursor initially only channel 1 is enable...

Страница 22: ...channel is enabled for differential operation for operation defined by the 5B module if used or for differential operation between a pair of channels automatically defined by the grid Since there are...

Страница 23: ...nnel from 1 through 8 but the second or negative channel is automatically selected by the software Clicking the left mouse button on the plus sign removes both plus and minus signs and thus disables t...

Страница 24: ...in the grid that represents the desired channel and click the left mouse button to enable the channel as a differential input when not using 5B modules or as an input defined by the 5B module when use...

Страница 25: ...in the grid that represents the desired channel and click the left mouse button to enable the channel as a differential input when not using 5B modules or as an input defined by the 5B module when use...

Страница 26: ...channel box indicating one differential chan nel and a minus sign is automatically displayed eight channels away i e channels 1 and 9 2 and 10 5 and 13 etc indicating the other differential channel Yo...

Страница 27: ...e an A in one box to des ignate channels A1 through A32 and a B in the other box to designate channels B1 through B32 Do the same for any slave instruments in your configuration but use C D etc Point...

Страница 28: ...box in the grid that represents the desired channel and click the left mouse button to enable the channel as a differential input when not using 5B modules or as an input defined by the 5B module when...

Страница 29: ...en not using 5B modules or as an input defined by the 5B module when used A check mark is displayed in the desired channel box indicating that a differential input when not using 5B modules or an inpu...

Страница 30: ...ouse button to enable the channel as a differential input when not using 5B modules or as an input defined by the 5B module when used A check mark is displayed in the desired channel box indicating th...

Страница 31: ...jection at 60Hz and 90dB at 50Hz Two poles of this filter are on the field side of the isolation barrier and the other four are on the com puter side After the initial field side filtering the input s...

Страница 32: ...2 module see block diagram for installation details Signal filtering is accomplished with a six pole filter which provides 95dB of normal mode rejection at 60Hz and 90dB at 50Hz Two poles of this filt...

Страница 33: ...amplifier and RMS converter on the field side of the isolation barrier The converted dc signal is then chopped by a proprietary chopper circuit and transferred across the transformer isolation barrie...

Страница 34: ...lf heating of the RTD Signal filtering is accomplished with a six pole filter which provides 95dB of normal mode rejection at 60Hz and 90dB at 50Hz Two poles of this filter are on the field side of th...

Страница 35: ...F to 120 C 248 F 10 at 0 C 0 C 32 F to 120 C 248 F 10 at 25 C 0 C 32 F to 160 C 320 F 10 at 0 C 0V to 5V 0V to 5V 0V to 5V 0 23 C 0 23 C 0 32 C 120 Ni 0 00672 DI 5B34N 01 0 C 32 F to 300 C 572 F 0V t...

Страница 36: ...mon pin 19 RTD excitation is provided from the module by a precision current source The excitation current is available on two leads which are separate from the two input signal measuring leads The ex...

Страница 37: ...32 F to 600 C 1112 F 0V to 5V 0V to 5V 0V to 5V 0V to 5V 0 46 C 0 36 C 0 46 C 0 88 C 10 Cu 0 004274 DI 5B35C 01 DI 5B35C 02DI 5B35C 03 0 C 32 F to 120 C 248 F 10 at 0 C 0 C 32 F to 120 C 248 F 10 at...

Страница 38: ...ffects of lead resistances The excitation currents are very small less than 1 0mA which minimizes self heating of the potentiometer Signal filtering is accomplished with a six pole filter which provid...

Страница 39: ...idth allows measurement of high speed processes such as vibration analysis Strain Gage excitation is provided from the module by a very stable 10V or 3 333V source The excitation supply is fully isola...

Страница 40: ...3mV V Sensitivity 5V to 5V DI 5B38 33 or DI 5B38 03 Half Bridge 100 to 10k 3 333V at 3mV V Sensitivity 5V to 5V DI 5B38 34 or DI 5B38 04 Half Bridge 300 to 10k 10 0V at 3mV V Sensitivity 5V to 5V DI...

Страница 41: ...a gain bandwidth product of 5MHz and is bandwidth limited to 10kHz After amplification the input signal is chopped by a proprietary chopper circuit Isolation is provided by transformer coupling again...

Страница 42: ...ternal multiplexers The DI 5B modules are designed with a completely isolated computer side circuit which can be floated to 50V from Power Common pin 16 This complete isolation means that no connectio...

Страница 43: ...e excitation supply is fully iso lated allowing the amplifier inputs to operate over the full range of the excitation voltage This feature offers signifi cant flexibility in real world applications Te...

Страница 44: ...eries Hardware Manual 5B Modules 38 DI 5B43 06 6V 10 0Vdc 40m DI 5B43 07A 7V 10 0Vdc 40m DI 5B43 08A 8V 10 0Vdc 40m DI 5B43 09 9V 10 0Vdc 40m DI 5B43 10 10V 10 0Vdc 40m CSA certification pending Free...

Страница 45: ...ble on pin 1 EXC and the excitation common is pin 3 In The DI 5B modules are designed with a completely isolated computer side circuit which can be floated to 50V from Power Common pin 16 This complet...

Страница 46: ...minals on the mounting hardware Upscale open ther mocouple detect is provided by an internal pull up resistor Downscale indication can be implemented by installing an external 47MW resistor 20 toleran...

Страница 47: ...0 70 C DI 5B47K 04 Type K 0 C to 1000 C 32 F to 1832 F 0 80 C DI 5B47K 05 Type K 0 C to 500 C 32 F to 932 F 0 38 C DI 5B47K 13 Type K 100 C to 1350 C 148 F to 2462 F 1 20 C DI 5B47K 14 Type K 0 C to 1...

Страница 48: ...Free Datasheet http www datasheet4u com...

Страница 49: ...Free Datasheet http www datasheet4u com...

Страница 50: ...Akron Ohio 44333 Telephone 330 668 1444 Fax 330 666 5434 E mail support dataq com Direct Product Links click on text to jump to page Data Acquisition Data Logger Chart Recorder Thermocouple Oscillosco...

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