Users Manual & Installation Guide

PV- 5127: Power supply module with UPS

00h: SOFT_OFF (first half of 2-second delay)

FEh: SOFT_ON

FFh: SOFT_OFF (second half of 2-second delay), or SOFT_TEMPBAD

Other values: SOFT_DELAY, delayed shutdown in progress. value = remaining seconds until

SOFT_OFF

Software normally won’t read the values 00h and FFh since the 5V+12V is off at this time. Writing 00h will turn off power immediately, and it will stay off for at least two seconds. You shouldn’t write FFh since this will turn power off for only one second, and this might not be enough for a CPU to reboot cleanly. Writing FEh will cancel a delayed shutdown in progress. Writing other values will initiate (or modify) a delayed shutdown, with the value being the number of seconds until SOFT_OFF.

Software compatibility

Windows NT 4.0: The PV-5127 RS232 interface is directly compatible with the Windows NT 4.0 UPS service, using the CDB-9F cable. It can monitor the three statuses (Normal, Mains alarm, Critical alarm), and use the RS232 Shutdown signal to power off.

Windows 2000 and XP: The UPS service in these operating systems can monitor the three statuses (Normal, Mains alarm, Critical alarm) through RS232, but it cannot power off the PV-5127 with the Shutdown signal. This is because the UPS service is terminated during shutdown, so it cannot activate the Shutdown signal when shutdown is complete.

To power off the PV-5127 after a shutdown under Windows 2000 and XP, you must use either the PS_ON signal with an ATX compatible CPU, or the PC/104 interface. Using the PS_ON signal ensures that power is turned off exactly when the operating system has finished shutting down. The PC/104 interface is used by the PV-5127 UPS minidriver available at http://www.micro- technic.com/pv5127/. This method does not use an RS232 port or cable.

Linux: Several UPS monitoring daemons exist which use the “simple” or “dumb” signalling protocol on a serial port. Examples are:

•apcupsd (http://www2.apcupsd.com): When using the CDB-9F cable, you should specify UPSCABLE 940-0020B.

•Network UPS Tools (http://www.networkupstools.org): When using the CDB-9F cable, you should specify genericups upstype=2.

•Other daemons: Make sure that you use the right handshake signals since no single standard exists for which handshake are used for which function, and adapt either the software configuration or the cable accordingly.

With some UPS hardware, you can experience a “deadlock” problem if mains power comes back after the UPS monitoring software has decided to shut down the operating system. This happens if the UPS monitoring software is unable to turn off power after the operating system has finished shutting down, because mains power has come back. This cannot happen with the PV-5127 because it always turns off power for at least two seconds after a power-off command through RS232 or PC/104, even if mains power is present.

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Micro Technic PV-5127A user manual Softoff, Software compatibility
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PV-5127A, PV-5127 specifications

The Micro Technic PV-5127 and PV-5127A models represent a significant achievement in the field of precision measurement instruments, specifically designed to enhance efficiency and accuracy in various industrial and scientific applications. These devices are characterized by their robust construction, user-friendly interface, and advanced technological features that cater to the needs of professionals.

One of the standout features of both the PV-5127 and PV-5127A is their high-resolution digital display, which provides clear readouts of measurements, ensuring that users can easily interpret data in real time. The devices boast a wide measurement range, allowing them to perform accurate readings across various parameters, including voltage, current, and resistance. This versatility makes them ideal for use in labs, research facilities, and fieldwork.

The PV-5127 and PV-5127A incorporate advanced microprocessor technology, ensuring precise measurements and quick response times. This technology enhances the instrument's ability to perform complex calculations, making it suitable for various applications, including electronics testing, industrial maintenance, and educational purposes.

Both models feature intuitive controls, enabling users to navigate functions effortlessly. The user interface is designed for simplicity, minimizing the learning curve for new users while empowering seasoned professionals to utilize the instruments to their full potential. Additionally, the PV-5127A includes enhanced features such as data logging and connectivity options, allowing users to transfer data to computers or other devices for further analysis.

Durability is another notable characteristic of these models. Constructed to withstand harsh working conditions, the PV-5127 and PV-5127A are built with high-quality materials that protect against impacts and environmental factors, ensuring longevity and reliability.

Power efficiency is also a critical aspect, as both models offer low power consumption without compromising performance. This feature is particularly important for users who rely on portable devices for extended periods.

In summary, the Micro Technic PV-5127 and PV-5127A models are sophisticated measurement instruments that combine advanced technology with user-friendly design. Their versatility, durability, and efficiency make them valuable tools for professionals across various fields, enhancing productivity and accuracy in measurement tasks. Whether in a laboratory setting or an industrial environment, these devices stand out as reliable companions for precise measurements.
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