Manuale d’uso / di manutenzione del prodotto SCB-68 del fabbricante National Instruments
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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.
Support Worldwide Technical Support and Product Info rmation ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide Of.
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.
Compliance FFCC/Canada Radio Frequency Interference Compliance Determining FCC Class The Federal Communications Commission (FCC) has rules to protect wireless communications from interference.
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.
© 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) .............
Contents © National Instruments Corporation ix SCB-68 Shielded Connector Block User Manual Selecting a Resistor .............. ........... .............. ............ .............. ........... ............. 5-17 Adding Components ...................
© 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.
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.
© 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.
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.
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 fo.
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/Co.
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.
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.
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 t.
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*.
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.
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.
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.
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.
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.
© 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.
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.
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.
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 feedthro.
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-en.
© 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.
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.
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.
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; t.
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 > ).
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.
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.
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.
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.
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.
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.
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.
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.
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.
© 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.
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.
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.
© 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.
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.
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.
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.
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.
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.
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.
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 .
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.
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 Filt.
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 .
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.
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.
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.
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 Considerati.
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.
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.
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.
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.
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 .
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.
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.
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.
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.
© 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 .
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) .
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.
© 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.
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 .
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 .
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 .
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.
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 65.
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.
© 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.
© 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.
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.
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 5.
© 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.
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 .
© 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.
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 .
© 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.
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 a.
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 ambie.
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 sign.
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, o.
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 g.
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 ica.
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 th.
© 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 .
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 s.
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 ana.
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 configuratio.
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.
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).
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.
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.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il National Instruments SCB-68 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del National Instruments SCB-68 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso National Instruments SCB-68 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul National Instruments SCB-68 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il National Instruments SCB-68, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del National Instruments SCB-68.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il National Instruments SCB-68. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo National Instruments SCB-68 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
