Auto-Parallel Programming. Program only the output current of the first ("master") supply in the series; the "slave" supplies automatically track the master's output. Program the output current of the slave supplies to zero. However, the voltage and OVP settings of the slave supplies must be set higher than the operating voltage of the master supply. This ensures that the slave supplies will operate in CC mode. Functions such as status, voltage readback, and current readback can still be read back individually for each supply.

If a "slave" supply experiences a desired shutdown condition (such as overtemperature or overcurrent), it will not automatically shut down all other supplies. You must first enable remote inhibit (RI) and discrete fault indicator (DFI) operation. See "Fault/Inhibit Operation" in "Appendix D - Digital Port Functions" for wiring information and "Questionable Status Group" in Chapter 4 of the "Programming Guide" for programming information.

Connecting Supplies in Series

Floating voltages must not exceed 240 Vdc. No output terminal may be more than 240 V from chassis ground.

Figure 4-4f shows how power supplies can be connected in series for higher voltage output. Series connections are straightforward in this case.

Program each power supply independently. If two supplies are used in the series configuration, program each supply for 50% of the total output voltage. Set the current limit of each supply to the maximum that the load can handle without damage.

Each power supply has a reverse voltage protection diode across its output. If a reverse voltage is applied, the supply cannot control the current conducted through this diode. To avoid damaging the supply, never connect it in such a way that a reverse voltage can force it to conduct current in excess of the supply's maximum reverse diode current (see Table 1-2b).

Load ConnectionAnalog ConnectorLoad

Program each supply for full load current and 1/2 the load voltage

A Connect for remote sensing (optional)

WARNING

FLOATING VOLTAGES MUST NOT EXCEED ±240 VDC NO OUTPUT TERMINAL MAY

BE MORE THAN 240 V FROM CHASSIS GROUND.

Figure 4-4f. Series 667xA Series Connection (Remote Sensing Optional)

74 User Connections

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Agilent Technologies 668xA, 665xA, 664xA, 669xA manual 4f. Series 667xA Series Connection Remote Sensing Optional
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668xA, 669xA, 667xA, 664xA, 665xA specifications

Agilent Technologies has long been a pioneer in the production of high-performance electronic test and measurement instruments, particularly in the field of power sources. Among its notable offerings are the Agilent 667xA, 669xA, 665xA, 664xA, and 668xA series of power supplies. These instruments are designed to provide stable, reliable power for a variety of applications, including electronic testing, industrial processes, and research laboratories.

The Agilent 667xA series is characterized by its programmability and advanced measurement functions. These power supplies support a wide range of output voltages and currents, allowing for flexible configurations that cater to different testing needs. The built-in measurement capabilities enable users to monitor the voltage, current, and power with high precision, which is essential for ensuring optimal performance in electronic applications.

The Agilent 669xA series stands out with its high-power outputs, making it suitable for demanding applications. These power supplies deliver high voltage and current levels, making them ideal for testing high-performance devices, such as power amplifiers and motor drives. Additionally, the 669xA series includes features such as overvoltage protection and complex output sequencing to enhance the safety and reliability of the testing process.

The Agilent 665xA and 664xA series focus on delivering high accuracy and excellent regulation. These models are particularly known for their low noise operation, which is critical for sensitive applications where precision is paramount. The integrated programming capabilities allow users to automate testing sequences, thus improving efficiency in research and development settings.

The 668xA series features advanced digital signal processing that enhances the precision and stability of the output. Users benefit from features like remote sensing and monitoring, allowing feedback adjustments that maintain output accuracy despite cable losses. Furthermore, the 668xA models can integrate seamlessly with various test environments thanks to their LAN, GPIB, and USB connectivity options.

Overall, the Agilent 667xA, 669xA, 665xA, 664xA, and 668xA power supplies provide a comprehensive range of solutions for diverse electronic testing needs. With their advanced features, superb measurement capabilities, and robust performance, these instruments empower engineers and researchers to conduct their work with confidence, precision, and efficiency.
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