National Instruments SCB-68 manual

DAQ SCB-68 68-Pin Shielded Connector Block User Manual SCB-68 Shielded Connector Block User Manual December 2002 Edition Part Number 3207 45B-01[...]

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Important Information Warranty The SCB-68 is warranted against defects in materials and wo rkmanship for a peri od of one year from the da te of shipment, as evi denced by receipts or other documentation. National Instruments will, at its opt ion, repair or replace equipment that proves to be defect ive during the warranty period. This warranty inc[...]

Compliance FFCC/Canada Radio Frequency Interference Compliance Determining FCC Class The Federal Communications Commission (FCC) has rules to protect wireless communications from interference. The FCC places digital electronics into two classes. These classes are known as Class A (for use in industrial-comme rcial locations onl y) or Class B (for u[...]

Canadian Departmen t of Communications This Class B digital apparatus meets all requirements of the Cana dian Interference-Causing Equipment Regulations. Cet appareil num é rique de la classe B respecte toutes les e xigences du R è gleme nt sur le mat é riel brouilleur du Canada. Compliance to EU Directives Readers in the European Union (EU) mus[...]

© National Instruments Corporation vii SCB-68 Shielded Connector Block User Manual Contents About This Manual Conventions ............ ........... .............. ............ .............. ........... ........... .............. ............ .... x i NI Documentation....................... .............. ........... ........... .............. ....[...]

Contents SCB-68 Shielded Connector Block User Manual viii ni.com Single-Ended Connection Considerations ........... .............. ............... ........... ... 3-8 Single-Ended Connections for Fl oating Signal Sources (RSE Input Mode) .............. ............ ........... .............. ........... ............ 3-9 Single-Ended Connections for[...]

Contents © National Instruments Corporation ix SCB-68 Shielded Connector Block User Manual Selecting a Resistor .............. ........... .............. ............ .............. ........... ............. 5-17 Adding Components ................... ........... .............. ........... ............... ........... ....... 5-18 Single-Ended Input[...]

© National Instruments Corporation xi SCB-68 Shielded Connector Block User Manual About This Manual This manual describes the SCB-68 and explains ho w to use the connector block with National In struments dat a acquisition (D A Q) devices. Conventions The follo wing con ventions appear in this manual: < > Angle brackets that contain numbers [...]

About This Manual SCB-68 Shielded Connector Block User Manual xii ni.com NI Documentation For more information about using the SCB -68 with D A Q de vices, refer to the following resources: • D A Q device user manuals, at ni.com/manuals • NI De veloper Zone, at ni.com/zone[...]

© National Instruments Corporation 1-1 SCB-68 Shielded Connector Block User Manual 1 Introduction The SCB-68 is a shielded I/O connector block w ith 68 screw terminals for easy signal connection to a National In struments 68- or 100-pin DAQ device. The SCB-68 features a general breadboard area for cu stom circuitry and sockets for interchanging el[...]

Chapter 1 Introduction SCB-68 Shielded Connector Block User Manual 1-2 ni.com ❑ The following items, if you are adding components (optional): – Soldering iron and solder – Resistors – Capacitors Quick Reference Label A quick reference label for E Series devices is included in this kit. Quick reference labels for some other devices ship wi t[...]

Chapter 1 Introduction © National Instruments Corporation 1-3 SCB-68 Shielded Connector Block User Manual NI 6024E for PCMC IA (D A QCard -6024E), NI 6036E for PCMC IA (D A QCard -6036E), NI 6062E for PCMC IA (D A QCard -6062E) SCH68-68-EP , RC68-68 Direct feedthrough only Thermocouple measurements Open thermocouple detection Current input Filteri[...]

Chapter 1 Introduction SCB-68 Shielded Connector Block User Manual 1-4 ni.com S Series Devices NI 6110/6111 for PCI SH68-68-EP SH68-68R1 -EP , R6868 Direct feedthrough only NI 6115/6120 for PCI/PXI/CompactPCI SH68-68-EP SH68-68R1 -EP , R6868 Direct feedthrough only Timing I/O (TIO) Devices NI 6601/6602 for PCI/PXI/CompactPCI SH68-68-D1 , R6868 Dire[...]

Chapter 1 Introduction © National Instruments Corporation 1-5 SCB-68 Shielded Connector Block User Manual Figure 1-1. SCB-68 Parts Locator Diagram Installing Cables The following sections describe how to cable one or more SCB-68 connector blocks to a DAQ device using 6 8-pin or 100-pin cabl es. Note For the I/O connector pinout of the D A Q device[...]

Chapter 1 Introduction SCB-68 Shielded Connector Block User Manual 1-6 ni.com Figure 1-2 sho ws ho w to use a 68-pin cable to connect the SCB-68 to a 68-pin D A Q device. Figure 1-2. Connecting a 68-Pin DAQ De vice to an SCB-68 Using 100-Pin Cables You can use the SH1006868 cable assembl y to connect two SCB-68 connector blocks to a 100-p in DAQ de[...]

Chapter 1 Introduction © National Instruments Corporation 1-7 SCB-68 Shielded Connector Block User Manual Figure 1-3. Connecting a 100-Pin DAQ Device to T wo SCB-68 Connector Blocks When you attach two SCB-68 devices to the SH1006868 cable, one of the SCB-68 connector blocks has a full 68-pin I/O connector pinout, and the other SCB-68 connector bl[...]

Chapter 1 Introduction SCB-68 Shielded Connector Block User Manual 1-8 ni.com Figure 1-4. SCB-68 E Series I/O Connector Pinout (Full) FREQ_OUT GPCTR0_OUT PFI9/GPCTR0_GATE DGND PFI6/WFTRIG PFI5/UPDATE* DGND +5V DGND PFI1/TRIG2 PFI0/TRIG1 DGND DGND +5V DGND DIO6 DIO1 DGND DIO4 EXTREF 3 DAC1OUT 1 DAC0OUT 1 ACH15 AIGND ACH6 ACH13 AIGND ACH4 AIGND ACH3 [...]

Chapter 1 Introduction © National Instruments Corporation 1-9 SCB-68 Shielded Connector Block User Manual Figure 1-5 shows the pin assignments for the extended AI connector . This pinout shows the other 68-pin connector w hen you use the SH1 006868 cable assembly with an NI 6031E, NI 6033E, or NI 6071 E. Figure 1-5. SCB-68 E Series I/O Connector P[...]

Chapter 1 Introduction SCB-68 Shielded Connector Block User Manual 1-10 ni.com Figure 1-6 shows the pin assignments for the extended digital connector. This pinout shows the other 68-pin connector when you use the SH1006868 cable assembly with an NI 6025E or the NI 6021E (A T - MIO-16DE-10) for ISA. Figure 1-6. SCB-68 E Series I/O Connector Pinout [...]

Chapter 1 Introduction © National Instruments Corporation 1-11 SCB-68 Shielded Connector Block User Manual Configuring the SCB-68 For instruction s about using Measurement & Autom ation Explorer (MAX) to configure the SCB-68 as an accessory for a DAQ device, complete the following steps: 1. Navigate to MAX b y selecting Start » Programs » Na[...]

Chapter 1 Introduction SCB-68 Shielded Connector Block User Manual 1-12 ni.com • Pollution Degree 3 means that conductive pollution occurs, or dry , nonconductiv e pollution occurs that becomes conductive due to condensation. Clean the SCB-68 with a soft nonmetallic brush. Make sure that the SCB-68 is completely dry and free from contaminants bef[...]

Chapter 1 Introduction © National Instruments Corporation 1-13 SCB-68 Shielded Connector Block User Manual installation, and equipment for industrial use, such as stationary motors with a permanent connect ion to the building/fixed installation. • Installation Category IV is for measurements performed at the source of the low-v oltage (<1,000[...]

© National Instruments Corporation 2-1 SCB-68 Shielded Connector Block User Manual 2 Parts Locator and Wiring Guide This chapter explains how to connect signals to the SCB-68. The following cautions contain important safety information concerning hazardous voltages and terminal blocks. Cautions K eep aw ay from li ve circuits. Do not remo ve equip[...]

Chapter 2 Parts Locator and Wiring Guide SCB-68 Shielded Connector Block User Manual 2-2 ni.com Figure 2-1. SCB-68 Printed Circuit Diagram 1 Pads R20 and R21 2 Switches S3, S4, and S5 3 68-Pin I/O Connector 4 Fuse (0.8 A) 5 Switches S1 and S2 6 Assembly Number and Revision Letter 7 Screw Terminals 8 Serial Number 9 RC Filters and Attenuators for DA[...]

Chapter 2 Parts Locator and Wiring Guide © National Instruments Corporation 2-3 SCB-68 Shielded Connector Block User Manual T o connect signals to the SCB-68, complete the follo wing steps while referring to Figure 1-1, SCB-68 Parts Locator Di agram , and to Figure 2-1. 1. Disconnect the 68-pin cable from the SCB-68, if it is connected. 2. Remov e[...]

Chapter 2 Parts Locator and Wiring Guide SCB-68 Shielded Connector Block User Manual 2-4 ni.com Table 2-1. Swit ch Configurations and Affected Signals Switch Setting Applicable Signals Direct feedthrough, with temperature sensor disabled and accessory po wer disabled Analog input, analog outpu t, digital I/O, an d timing I/O T emperature sensor dis[...]

Chapter 2 Parts Locator and Wiring Guide © National Instruments Corporation 2-5 SCB-68 Shielded Connector Block User Manual Single-ended temperature sensor , with accessory power e nabled 2 Single-ended analog in put 3 Dif ferential temperature sensor , with accessory power enabled 2 Dif ferential analog input 1 When accessory power is enabled, I/[...]

© National Instruments Corporation 3-1 SCB-68 Shielded Connector Block User Manual 3 Connecting Signals This chapter describes the types of signal sources that you use when configuring the channels and mak ing signal connections to the SCB-68, describes input modes, and discusses noise considerations to hel p you acquire accurate signals. Connecti[...]

Chapter 3 Connecting Signals SCB-68 Shielded Connector Block User Manual 3-2 ni.com Figure 3-1. Summary of AI Connections + – + – + – V 1 ACH AISENSE AIGND + – + – V 1 ACH AIGND + – + – V 1 ACH(+) ACH(–) AIGND + – + – V 1 ACH(+) ACH(–) AIGND R Refer to the Using Bias Resistors section for inf or mation on bias resistors. Signa[...]

Chapter 3 Connecting Signals © National Instruments Corporation 3-3 SCB-68 Shielded Connector Block User Manual Nonreferenced or Floating Signal Sources A floating signal source is a signal source that is not connected in any way to the building ground system, but has an isolated ground-reference point. Instruments o r devices with isolated output[...]

Chapter 3 Connecting Signals SCB-68 Shielded Connector Block User Manual 3-4 ni.com Ground-Referenced Signal Sources A grounded signal source is co nnected in some way to the building system ground; therefore, the signal source i s already connected to a common ground point with respect to the DAQ device (assum ing that the host computer is plugged[...]

Chapter 3 Connecting Signals © National Instruments Corporation 3-5 SCB-68 Shielded Connector Block User Manual Ana l og I n put C h annel Co n f i guration D i agram f o r ACH< i > a n d AC H < i+8 > ). A n y signal c o ndi t i o n ing c i rcu i try requ i ri n g a gro u nd reference should be built in the custom breadboard area using[...]

Chapter 3 Connecting Signals SCB-68 Shielded Connector Block User Manual 3-6 ni.com Differential Connections for Ground-Referenced Signal Sources Figure 3-2 shows how to connect a ground-referenced signal source to a channel on the DAQ device configured in DIFF input mode. Figure 3-2. Differential Input Connections for Ground-Referenced Signals W i[...]

Chapter 3 Connecting Signals © National Instruments Corporation 3-7 SCB-68 Shielded Connector Block User Manual Differential Connections for Nonreferenced or Floating Signal Sources Figure 3-3 shows how to connect a floating signal source to a channel on the DAQ device configured in DIFF input mode. Figure 3-3. Differential Input Connections for N[...]

Chapter 3 Connecting Signals SCB-68 Shielded Connector Block User Manual 3-8 ni.com Common-mode rejection migh t be improv ed by using another bias resistor between A CH+ or ACH< i >, and AIGND. This connection creates a slight measurement error caused by the v oltage divider formed with the output impedance of the floating so urce, but it al[...]

Chapter 3 Connecting Signals © National Instruments Corporation 3-9 SCB-68 Shielded Connector Block User Manual Single-Ended Connections for Floating Signal Sources (RSE Input Mode) Figure 3-4 shows how to connect a floating signal source to a channel on the DAQ device configured for RSE input mode. Figure 3-4. Single-Ended Input Connections for N[...]

Chapter 3 Connecting Signals SCB-68 Shielded Connector Block User Manual 3-10 ni.com Figure 3-5 shows ho w to connect a grounded signal source to a chann el on the DAQ device configured for NRSE input mode. Figure 3-5. Single-Ended Input Connections for Ground-Referenced Signals Connecting Analog Output Signals When using the SCB-68 with a 68 -pin [...]

Chapter 3 Connecting Signals © National Instruments Corporation 3-11 SCB-68 Shielded Connector Block User Manual Figure 3-6 shows ho w to make A O connections and the external reference connection to the SCB-68 and the D A Q device. Figure 3-6. Connecting AO Signals Connecting Digital Signals When using the SCB-68 with a 68 -pin or 100-pin DAQ dev[...]

Chapter 3 Connecting Signals SCB-68 Shielded Connector Block User Manual 3-12 ni.com Figure 3-7. Digita l I/O Connections Connecting T iming Signals If you are using a 68-pin or 10 0-pin DAQ device, all external control over device timing is routed through th e programmable function input (PFI) lines <0..9>. These PFI lines are bidirectional;[...]

Chapter 3 Connecting Signals © National Instruments Corporation 3-13 SCB-68 Shielded Connector Block User Manual All digital timing connection s are referenced to DGND. Figure 3-8 demonstrates how to connect two external timing signals to the PFI pins of a D A Q device. Figure 3-8. Timing I/O Connections Noise Considerations Environmental noise ca[...]

Chapter 3 Connecting Signals SCB-68 Shielded Connector Block User Manual 3-14 ni.com ACH+ and ACH – inputs are twi sted toge ther and th en covere d with a shield. You th en connect this sh ield at only one point to the sign al source ground. This ki nd of connection is requ ired for signals traveling th rough areas with large magnetic fi elds or[...]

© National Instruments Corporation 4-1 SCB-68 Shielded Connector Block User Manual 4 Using Thermocouples This chapter describes how to take ther mocouple measurements using the SCB-68. A thermocouple is created when two dissimilar metals touch, and the contact produces a small voltage that changes as a function of temperature. By measuring the vol[...]

Chapter 4 Using The rmocouples SCB-68 Shielded Connector Block User Manual 4-2 ni.com The maximum voltage lev el thermocouples genera te is typically only a fe w milliv olts. Therefore, you should use a DA Q device with high gain fo r best resolution. Y ou can measure thermocouples in either differential or single-ended configuration. The dif feren[...]

Chapter 4 Using Thermocouples © National Instruments Corporation 4-3 SCB-68 Shielded Connector Block User Manual Figure 4-1. Single-Ended Switch Configuration For dif ferential operation, connect differential analog channel 0 to the temperature sensor by switching S5 and S4 to the up pos ition, as sho wn in Figure 4-2. Figure 4-2. Differential Swi[...]

© National Instruments Corporation 5-1 SCB-68 Shielded Connector Block User Manual 5 Adding Components for Special Functions This chapter describes how to condition sign als by adding componen ts to the open component locations of t he SCB-68. To add components to these locations, the DAQ device must support switch configuration s 2, 3, or 4 in Ta[...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-2 ni.com Y ou can create virtual channels in MAX to map your voltage ranges to the type of transducer that you are using or to create a custom scale. Channel Pad Configurations When you use the SCB-68 with a 68-pi n or 100-pin DAQ device, you can use the[...]

Chapter 5 Adding Components for Spe cial Functions © National Instruments Corporation 5-3 SCB-68 Shielded Connector Block User Manual Conditioning Analog Output Channels Figure 5-2 illustrates the generic AO channel pad configuration, and Table 5-2 describes the AO component locatio ns and labels. Figure 5-3 shows the AO channel configuration for [...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-4 ni.com Figure 5-3. Analog Output Channel Configuration Diagram for DAC0OUT Conditioning PFI0/TRIG1 Figure 5-4 illustrates the digital input channel con figuration, and Figure 5-5 shows the digital inp ut channel configuration for PF I0/TRIG1. Figure 5-[...]

Chapter 5 Adding Components for Spe cial Functions © National Instruments Corporation 5-5 SCB-68 Shielded Connector Block User Manual Accuracy and Resolution Considerations When you measure voltage to subsequently measure current, take the following steps to maximize measurement accuracy: 1. Refer to the accuracy tables in Appendix A, Specificatio[...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-6 ni.com Differential Open Thermocouple Detection Use position A to conn ect a high-value resistor between the positive i nput and +5V. Leave the jumpers in place (positions F and G) for each channel used. Single-Ended Open Thermocouple Detection Use pos[...]

Chapter 5 Adding Components for Spe cial Functions © National Instruments Corporation 5-7 SCB-68 Shielded Connector Block User Manual Thermocouple wire error is the result of inconsistencies in the thermocouple manufacturing process. These inconsistencies, or nonhomogeneities, are the result of defects or im purities in the thermocouple wire. The [...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-8 ni.com Figure 5-6. T ransfer Function Attenuation for an Ideal Filter Figure 5-7. T ransfer Function Attenuation for a Real Filter The cut-of f frequency , f c , is defined as the frequency beyond which the gain drops 3 dB . Figure 5-6 shows ho w an id[...]

Chapter 5 Adding Components for Spe cial Functions © National Instruments Corporation 5-9 SCB-68 Shielded Connector Block User Manual ringing in the signal as the higher frequenc y components of the signal are delayed. Figure 5-8. Square Wave Input Signal Figures 5-9 and 5-10 show the difference in response to a square w av e between an ideal and [...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-10 ni.com Figure 5-10. Response of a Real Filter to a Square W ave Input Signal One-Pole Lowpass RC Filter Figure 5-11 shows the transfer function of a simple series circuit consisting of a resistor ( R ) and capacitor ( C ) when the voltage across R is [...]

Chapter 5 Adding Components for Spe cial Functions © National Instruments Corporation 5-11 SCB-68 Shielded Connector Block User Manual Use Equation 5-3 to design a lowpass filter for a simple resistor and capacitor circuit, where the v alues of the resistor and capacitor alone determine f c . In this equation, G is the DC gain and s represents the[...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-12 ni.com For an y ty pe of lowpass f ilter, use Equation 5-5 to determine the cut-off frequency ( f c ). (5-5) Single-Ended Lowpass Filter To build a single-ended lowpass filter, refer to Figu re 5-12. Add the resistor to position B or D, depending on t[...]

Chapter 5 Adding Components for Spe cial Functions © National Instruments Corporation 5-13 SCB-68 Shielded Connector Block User Manual Lowpass Filtering Applications Noise filtering and antialiasing are two applications that use lowpass filters. Noise Filtering You can use a lowpass filter to highly attenuate the noise frequency on a measured sign[...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-14 ni.com T o prev ent al iasing, remove all signal components with frequencies greater than the Nyquist frequency from input signals before those signals are sampled. Once a data sample is aliased, it is impossible to accurately reconstruct the original[...]

Chapter 5 Adding Components for Spe cial Functions © National Instruments Corporation 5-15 SCB-68 Shielded Connector Block User Manual Figure 5-15. Lowpass Filtering of AO Signals Special Consideration for Digital T rigger Input Signals Lowpass filters can function as deb ouncing filters to sm ooth noise on digital trigger input signals, thu s ena[...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-16 ni.com Apply a lo wpass f ilter to the signal to remo ve the high-frequency component for a cleaner digital signal, as Figure 5-17 s how s. Figure 5-17. Lowpass Filtering of Digital T rigger Input Signals Note Due to the filter order , the digital tri[...]

Chapter 5 Adding Components for Spe cial Functions © National Instruments Corporation 5-17 SCB-68 Shielded Connector Block User Manual Figure 5-18. Current-to-Voltage Electrical Cir cuit The application software must linearly con vert voltage back to current. Equation 5-8 demonstrates this con version, where the resistor is the denominator and V i[...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-18 ni.com Adding Components Caution Do not exceed ±10 V at the analog inputs. NI is not liable for any de vi ce damage or personal injury resulting from improper connections. Y ou can build a one-resistor circuit for measuring current at the single-ende[...]

Chapter 5 Adding Components for Spe cial Functions © National Instruments Corporation 5-19 SCB-68 Shielded Connector Block User Manual Figure 5-19. Attenuating V oltage with a Voltage Divider Theor y of Operation The voltage divider splits the input voltage ( V in ) between two resistors ( R 1 and R 2 ), causing the voltage on each resistor to be [...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-20 ni.com Selecting Components To set up the resistors, complete the following steps: 1. Select the v alue for R 2 (10 k Ω is recommended). 2. Use Equation 5-12 to calculate the value for R 1 . Base the R 1 calculation on the following v a lues: • Ma[...]

Chapter 5 Adding Components for Spe cial Functions © National Instruments Corporation 5-21 SCB-68 Shielded Connector Block User Manual Figure 5-20. SCB-68 Cir cuit Diagram for SE Input Attenuation Install resistors in po sitions B and F , or positions D and G, dependi ng on the channel you are u sing on the SCB-68. Use Equ ations 5-14 or 5-1 5 to [...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-22 ni.com Analog Output and Digital Input Attenuators To build a two-resistor circuit for attenuating vol tages at the DAC0OUT, DAC1OUT, and TRIG1 pins on the SCB-68, refer to the pad position s in Figure 5-22. Figure 5-22. SCB-68 Circuit Diagram for Dig[...]

Chapter 5 Adding Components for Spe cial Functions © National Instruments Corporation 5-23 SCB-68 Shielded Connector Block User Manual Figure 5-23. Input Impedance Electrical Cir cuit Z in is the ne w inp ut impedance. Refer to Appendix A, Specifications , in the device user manuals at ni.com/manuals for the input impedance. Equation 5-20 shows th[...]

Chapter 5 Adding Components for Special Functions SCB-68 Shielded Connector Block User Manual 5-24 ni.com Special Considerations for Digital Inputs If you use the V in voltage of Figure 5-20 to feed TTL signals, you must calculate V in so that the voltage drop on R 2 does not exceed 5 V. Caution A voltage drop exceeding 5 V on R 2 can damage the in[...]

© National Instruments Corporation A-1 SCB-68 Shielded Connector Block User Manual A Specifications This appendix lists the SCB-68 specif ications. These ratings are typical at 25 ° C unless otherwise stated. Analog Input Number of channels 68-pin DAQ devices ................ ....... Eight differential, 16 single-ended 100-pin DAQ devices .......[...]

Chapter A Specificat ions SCB-68 Shielded Connector Block User Manual A-2 ni.com Voltage rating ......... .............. ............ ......250 V Nominal resistance ............. .............. ......0.195 Ω Physical Box dimensions (including box feet) ......19 .5 by 15.2 by 4.5 cm (7.7 by 6 .0 by 1 .8 in.) I/O connectors ............... ........[...]

Chapter A Specifications © National Instruments Corporation A-3 SCB-68 Shielded Connector Block User Manual Safety The SCB-68 meets the requirements of the follo wing standards for safety and electrical equipment for measurement, control, and laboratory us e: • IEC 61010-1, EN 61010-1 • UL 3111-1 • CAN/CSA C22.2 No. 1010.1 Note For UL and ot[...]

© National Instruments Corporation B-1 SCB-68 Shielded Connector Block User Manual B Quick Reference Labels This appendix shows the pinouts that appear on t he quick reference labels for the D A Q devices that are compatible with the SCB-68.[...]

Chapter B Quic k Reference Labels SCB-68 Shielded Connector Block User Manual B-2 ni.com Figure B-1. E Series Devices D AC1 OUT D AC0 OUT SCANCLK EXTREF AOGND AOGND AIGND DIO5 51 ACH4 S4 * 68 GENERIC TERMINALS ACCESSOR Y POWER OFF) (TEMP . SENSOR AND S4 * ACCESSOR Y POWER ON ON DIFFERENTIAL CH. 0 * TEMP . SENSOR ENABLED S5 S5 ACH7 ACH15 23 57 22 56[...]

Chapte r B Quick Refer ence Labe ls © National Instruments Corporation B-3 SCB-68 Shielded Connector Block User Manual Figure B-2. NI 670 X Devices S4 * 68 GENERIC TERMINALS ACCESSOR Y POWER OFF) (TEMP . SENSOR AND S5 23 57 S3 S2 S1 58 24 25 59 27 60 26 61 28 VCH1 66 ICH17* 62 29 30 63 64 31 32 65 AGND0/A GND16 ICH16* AGND1/A GND17 VCH0 VCH3 ICH19[...]

Chapter B Quic k Reference Labels SCB-68 Shielded Connector Block User Manual B-4 ni.com Figure B-3. NI 671 X /673 X Devices D AC1 OUT D AC0 OUT NCC EXTREF AOGND AOGND AIGND DIO5 51 S4 * 68 GENERIC TERMINALS ACCESSOR Y POWER OFF) (TEMP . SENSOR AND S5 23 57 22 56 S3 S2 S1 58 24 25 59 27 60 26 61 28 21 55 54 20 DIO0 52 53 19 DGND DIO4 18 DGND S4 F A[...]

Chapte r B Quick Refer ence Labe ls © National Instruments Corporation B-5 SCB-68 Shielded Connector Block User Manual Figure B-4. S Series Devices D AC1OUT D AC0OUT NC SCANCLK AOGND AOGND DIO5 51 S4 * 68 GENERIC TERMINALS ACCESSOR Y POWER OFF) (TEMP . SENSOR AND S4 * ACCESSOR Y POWER ON ON DIFFERENTIAL CH. 0 * TEMP . SENSOR ENABLED S5 S5 23 57 22[...]

Chapter B Quic k Reference Labels SCB-68 Shielded Connector Block User Manual B-6 ni.com Figure B-5. NI 660 X Devices S1 S2 S3 S4 SET SWITCHES AS FOLLOWS FOR NI 660 X DEVICES. If using an NI 660 X device with an optional SCB - 68 shielded connector bloc k accessory , affix this label to the inside of the SCB - 68 and set the switches as shown below[...]

Chapte r B Quick Refer ence Labe ls © National Instruments Corporation B-7 SCB-68 Shielded Connector Block User Manual Figure B-6. NI 653 X Devices S1 S2 S3 S4 * SET SWITCHES AS FOLLOWS FOR THE NI 653 X If using an NI 653 X with an optional SCB - 68 shielded connector bloc k accessory , affix this label to the inside of the SCB - 68 and set the sw[...]

Chapter B Quic k Reference Labels SCB-68 Shielded Connector Block User Manual B-8 ni.com Figure B-7. NI 7811R/7831R Devices S1 NC = No Connect 1 THE MIO COLUMN CORRESPONDS TO THE MIO CONNECTOR ON THE NI 7831R, AND THE DIO COLUMN CORRESPONDS TO THE DIO CONNECTORS ON THE NI 7811R / 7831R. S2 S3 S4 SET SWITCHES IN THIS CONFIGURA TION T O USE THE SCB-6[...]

© National Instruments Corporation C-1 SCB-68 Shielded Connector Block User Manual C Fuse and Power One of the +5 V lines from the D A Q de vice (pin 8) is protected b y an 800 mA fuse. Pin 14 is also +5 V , but it is not fuse-protected on the SCB-68. Shorting pin 14 to ground blows the fuse, which is usually socketed. If the SBC-68 does not work [...]

© National Instruments Corporation D-1 SCB-68 Shielded Connector Block User Manual D SCB-68 Circuit Diagrams This appendix contains illustratio ns of circuit diagrams for the SCB-68. Figure D-1. +5 V Power Supply +5V (I/O Pin 8) +5V Screw Terminal ACC Not Powered (NC) C2 (10 µ F) XF1 (Clip) 800 mA 5x20 mm S1 ACC Powered C1 (0.1 µ F) R20 (Optiona[...]

Chapter D SCB-68 Circuit Diagrams SCB-68 Shielded Connector Block User Manual D-2 ni.com Figure D-2. Cold-Junction Compensation Cir cuitry Figure D-3. Digital T rigger Circuitry ACH0 (I/O Pin 68) S5 CJC Not Used CJC Used R38 Q1 +5V C3 (0.1 µ F) C5 (1 µ F) R23 +5V R5 ACH8 Screw Terminal S4 ACH8 (I/O Pin 34) RSE CJC or Non-MIO DIFF CJC AI AI AI AIG[...]

Chapter D SCB-68 Circuit Diagrams © National Instruments Corporation D-3 SCB-68 Shielded Connector Block User Manual Figure D-4. Analog Output Cir cuitr y RC3 DAC0OUT (I/O Pin 22) R3 AOGND (I/O Pin 55) RC2 DAC1OUT (I/O Pin 21) R2 DAC1OUT Screw Terminal AOGND (I/O Pin 54) AOGND Screw Terminal AOGND Screw Terminal DAC0OUT Screw Terminal[...]

© National Instruments Corporation E-1 SCB-68 Shielded Connector Block User Manual E Soldering and Desoldering on the SCB-68 Some applications discussed here require you to make modifications to the SCB-68, usually in the form of adding comp onents to the printed circuit device. T o solder and desolder components on the SCB-68, refer to Figure 2 -[...]

Chapter E Soldering and Desoldering on the SCB-68 SCB-68 Shielded Connector Block User Manual E-2 ni.com 1. Disconnect the 68-pin cable from the SCB-68 if it is connected. 2. Remov e the shielding scr e ws on either sid e of the top cover with a Phillips-head number 1 screwdri ver . Y ou can no w open the box. 3. Loosen the strain-relief screws wit[...]

© National Instruments Corporation F-1 SCB-68 Shielded Connector Block User Manual F T echnical Support and Professional Ser vices Visit the following sections of the National Instruments Web site at ni.com for technical support and professional services: • Support — Online technical support resources include the following: – Self-Help Resou[...]

Chapter F T echnical Support and Profe ssional Services SCB-68 Shielded Connector Block User Manual F-2 ni.com • Calibration Certificate — If your product supports calibration, you can obtain the calibration certificate for your product at ni.com/calibration . If you searched ni.com and could not find the answers you need, contact your local of[...]

© National Instruments Corporation G-1 SCB-68 Shielded Connector Block User Manual Glossar y Pref ix Meanings V alue p- pico 10 – 12 n- nano- 10 – 9 µ -m i c r o - 1 0 – 6 m- milli- 10 – 3 k- kilo- 10 3 M- mega- 10 6 G- giga- 10 9 Numbers/Symbols ° degrees > greater than ≤ less than or equal to ≥ greater than or equal to < less[...]

Glossary SCB-68 Shielded Connector Block User Manual G-2 ni.com square root of +5V +5 VDC source signal A A amperes A/D analog-to-digital A C alternating current A CH analog input channel signal ADC analog-to-digital con verter — an electronic device, often an inte grated circuit, that con verts an analog v oltage to a digital number AI analog in[...]

Glossary © National Instruments Corporation G-3 SCB-68 Shielded Connector Block User Manual cm centimeter cold-junction compensation CJC — an artificial reference lev el that compensates f or ambient temperature v ariations in thermocouple measurement circuits CompactPCI refers to the core specif ication defined by the PCI Industrial Computer Ma[...]

Glossary SCB-68 Shielded Connector Block User Manual G-4 ni.com E EXTREF external reference signal EXTSTR OBE exter nal strobe signal EXTTRIG ext ernal trig ger signal F FREQ_OUT frequency output signal ft feet G gain the factor by which a signal is amplified , often expressed in dB GA TE gate signal GPCTR general purpose counter GPCTR0_GA TE gener[...]

Glossary © National Instruments Corporation G-5 SCB-68 Shielded Connector Block User Manual I I/O input/output — the transfer of data to/from a computer system in volving communications channels, operator interface de vices, and/or data acquisition and control interfaces I OH current, output high I OL current, output low L lo wpass f ilter a fil[...]

Glossary SCB-68 Shielded Connector Block User Manual G-6 ni.com Nyquist frequency a frequency that is half of the sampling frequency O OUT output pin — a count er output pin where th e counter can generat e various TTL pulse wa veforms P PCI Peripheral Component Interconnect — a high-performance expansion b us architecture originally de veloped[...]

Glossary © National Instruments Corporation G-7 SCB-68 Shielded Connector Block User Manual PXI PCI eXtensions for Instrumentation — an open specification that b uilds off the CompactPCI specif ication by adding instrumentation-specific features R range the maximum and minimum parameters between which a device operates with a specified set of ch[...]

Glossary SCB-68 Shielded Connector Block User Manual G-8 ni.com T thermocouple a temperature sensor created by joining two dissimilar metals; the junction produces a small v oltage as a function of the temperature TRIG trigger signal TTL transistor-transistor logic U unipolar a signal range that is always positi ve (for example, 0 to +10 V) UPD A T[...]

© National Instruments Corporation I-1 SCB-68 Shielded Connector Block User Manual Index Numbers +5 V signal fuse and power considerations, C-1 power supply (figure), D-1 68-pin cables connecting to SCB-68 (fig ure), 1-6 installing, 1-5 to 1-6 quick reference label (table), 1-2 100-pin cables connecting to SCB-68 (fig ure), 1-7 installing, 1-6 to [...]

Index SCB-68 Shielded Connector Block User Manual I-2 ni.com DAC0OUT configuration diagram (figure), 5-4 input attenuators, 5-22, 5-23 lowpass filter considerations, 5-12, 5-14 to 5-15 analog output signal connections description, 3-10 t o 3-11 switch settings (table), 4-4 antialiasing filtering, 5-13 to 5-14 attenuating voltage, 5-18 to 5-24 addin[...]

Index © National Instruments Corporation I-3 SCB-68 Shielded Connector Block User Manual selecting components, 5-20 accuracy considerations, 5-20 special considerations analog input, 5-22 to 5-23 analog out put, 5-23 digital inputs, 5-24 theory of operation, 5-19 channel pad configurations, 5-2 to 5-4 analog input channels, 5-2 to 5-3 analog outpu[...]

Index SCB-68 Shielded Connector Block User Manual I-4 ni.com selecting resistor, 5-17 theory of operation, 5-16 to 5-17 D DAC0OUT signal component location in DIFF input mode (table), 5-3 configuration diagram (figure), 5-4 DAC1OUT signal component location (table), 5-3 Declaration of Conformity (DoC), F-1 desoldering and soldering, E-1 to E-2 diff[...]

Index © National Instruments Corporation I-5 SCB-68 Shielded Connector Block User Manual I input modes. See analog input signal connections installation 68-pin cables, 1-5 to 1-6 connecting to SCB-68 (figure), 1-6 quick reference label (table), 1-2 1 0 0 - p i n c a b l e s , 1 - 6t o1 - 1 0 connecting to SCB-68 (figure), 1-7 pin assignm ents SCB-[...]

Index SCB-68 Shielded Connector Block User Manual I-6 ni.com nonreferenced or floating signal sources bias resistors, 3-7 description, 3-3 description (figure), 3-2 differential connections, 3-3, 3-7 to 3-8 recommended config uration (figure), 3-2 single-ended connection s (RSE input mode), 3-3, 3-9 NRSE (nonreferenced single-ended input). See sing[...]

Index © National Instruments Corporation I-7 SCB-68 Shielded Connector Block User Manual safety informatio n, 1-11 to 1 -13 specifications, A-1 to A-3 SCB-68 E Series I/O Connector pinout extended AI (figure), 1-9 extended digital (fig ure), 1-10 full (figure), 1- 8 signal connections. See connecting sign als single-ended connection s description,[...]

Index SCB-68 Shielded Connector Block User Manual I-8 ni.com special considerations analog input, 5-22 to 5-23 analog out put, 5-23 digital inputs, 5-24 theory of operation, 5-19[...]