SCB-68 Connector Block

Analog output circuitry national instruments

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Unformatted text preview: E Soldering and Desoldering on the SCB-68 1. 2. 3. 4. 5. 6. Disconnect the 68-pin cable from the SCB-68 if it is connected. Remove the shielding screws on either side of the top cover with a Phillips-head number 1 screwdriver. You can now open the box. Loosen the strain-relief screws with a Phillips-head number 2 screwdriver. Remove the signal wires from screw terminals. Remove the device-mount screws and the 68-pin connector screws. Tilt the SCB-68 up and pull it out. To reinstall the SCB-68, reverse the order of the steps. The SCB-68 ships with wire jumpers in the F and G positions, as Figure 2-1, SCB-68 Printed Circuit Diagram, shows. You must remove the wire jumpers to use the positions. Use a low-wattage soldering iron (20 to 30 W) when soldering to the SCB-68. To desolder on the SCB-68, vacuum-type tools work best. Be careful to avoid damaging the component pads when desoldering. Use only rosin-core electronic-grade solder, because acid-core solder damages the printed-circuit device and components. SCB-68 Shielded Connector Block User Manual E-2 Technical Support and Professional Services F Visit the following sections of the National Instruments Web site at for technical support and professional services: Support--Online technical support resources include the following: Self-Help Resources--For immediate answers and solutions, visit our extensive library of technical support resources available in English, Japanese, and Spanish at These resources are available for most products at no cost to registered users and include software drivers and updates, a KnowledgeBase, product manuals, step-by-step troubleshooting wizards, hardware schematics and conformity documentation, example code, tutorials and application notes, instrument drivers, discussion forums, a measurement glossary, and so on. Assisted Support Options--Contact NI engineers and other measurement and automation professionals by visiting Our online system helps you define your question and connects you to the experts by phone, discussion forum, or email. Training--Visit for self-paced tutorials, videos, and interactive CDs. You also can register for instructor-led, hands-on courses at locations around the world. System Integration--If you have time constraints, limited in-house technical resources, or other project challenges, NI Alliance Program members can help. To learn more, call your local NI office or visit Declaration of Conformity (DoC)--A DoC is our claim of compliance with the Council of the European Communities using the manufacturer's declaration of conformity. This system affords the user protection for electronic compatibility (EMC) and product safety. You can obtain the DoC for your product by visiting National Instruments Corporation F-1 SCB-68 Shielded Connector Block User Manual Chapter F Technical Support and Professional Services Calibration Certificate--If your product supports calibration, you can obtain the calibration certificate for your product at If you searched and could not find the answers you need, contact your local office or NI corporate headquarters. Phone numbers for our worldwide offices are listed at the front of this manual. You also can visit the Worldwide Offices section of to access the branch office Web sites, which provide up-to-date contact information, support phone numbers, email addresses, and current events. SCB-68 Shielded Connector Block User Manual F-2 Glossary Prefix pnmkMGMeanings pico nanomicromillikilomegagigaValue 10 12 10 9 10 6 10 3 10 3 10 6 10 9 Numbers/Symbols > < / % + degrees greater than less than or equal to greater than or equal to less than negative of, or minus ohms per percent plus or minus positive of, or plus National Instruments Corporation G-1 SCB-68 Shielded Connector Block User Manual Glossary square root of +5V +5 VDC source signal A A A/D AC ACH ADC AI AIGND AISENSE AO AOGND ASIC amperes analog-to-digital alternating current analog input channel signal analog-to-digital converter--an electronic device, often an integrated circuit, that converts an analog voltage to a digital number analog input analog input ground signal analog input sense signal analog output analog output ground signal Application-Specific Integrated Circuit--a proprietary semiconductor component designed and manufactured to perform a set of specific functions to decrease the amplitude of a signal American wire gauge attenuate AWG C C CH Celsius channel--pin or wire lead to which you apply or from which you read the analog or digital signal. Analog signals can be single-ended or differential. For digital signals, you group channels to form ports. Ports usually consist of either four or eight digital channels SCB-68 Shielded Connector Block User Manual G-2 Glossary cm cold-junction compensation CompactPCI CONVERT* counter/timer CTR centimeter CJC--an artificial reference level that compensates for ambient temperature variations in thermocouple measurement circuits refers to the core specification defined by the PCI Industrial Computer Manufacturer's Group (PICMG) convert signal a circuit that counts external pulses or clock pulses (timing) counter D DAC digital-to-analog converter--an electronic device, often an integrated circuit, that converts a digital number into a corresponding analog voltage or current analog channel 0 outpu...
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This note was uploaded on 05/19/2012 for the course ELEN 3030 taught by Professor Joshi during the Spring '12 term at Marquette.

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