This document explains the procedure for adding an existing module inside an open frame rack. Mechanical assembly is addressed at first (e.g. for placing the required sensors on the heatsink); second, the reprogramming of the CPLD of each module is also required in order to enable the thermal protection features enabled by the sideboard controller.

The following steps are valid for PEB8032 or PEB4046 power modules. For other modules, please contact

Please make sure that all modules are powered off and DC capacitors have been discharged before processing through this guide.

  File Modified
File powertrench.pof CPLD file Jun 16, 2020 by Gabriel Fernandez

Mechanical assembly

Before inserting the PEB module in the open rack, connect a wire with a ring terminal on the AC power terminal of each PEB. Those power terminals being difficult to access when the PEB module is already in the rack, it is recommended to wire these terminals at first.

Place the PEB module in the rack, and connect the flat ribbon cable to the board-to-board connector of each PEB as well as on the sideboard controller, as shown in the following picture.

The fan extension cables can be connected to the fan of each power module. The temperature sensor must be placed between two fins of the heat sink, as shown in the picture below. You can use a screwdriver to slightly bend one fin in order to block the NTC inside the heat sink, or, ideally a bit of glue.


Once the assembly is done, the CPLD of each PEB must be reprogrammed.

  1. First of all, Quartus II 12.1 Programmer must be downloaded and installed from Intel’s website:

  2. When the installation is finished, open Quartus Programmer, click on “file” and then on “Open…”. Select the “powertrench.pof” file attached to this note.

  3. Check the options “Program/Configure” and “Verify”.

  4. Connect the USB cable of the programmer to the computer.

  5. Click on “Hardware Setup” and select “USB Blaster”.

  6. Turn on the open-rack.

  7. Connect the flat cable to the JTAG connector of the PEB power module.

  8. Finally, click on “Start”. A message appears when the programming is done.

Repeat steps 7 and 8 for each power module.

After flashing and assembly, always validate the proper functioning of the PEB module under low voltage and current ratings.

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