Introducing the Alkly Designs Breakout Board for HP Common Slot Server Power Supplies!

Our innovative Breakout Boards are specifically designed to enable the easy and reliable use of these high-quality power sources, providing unique solutions to control and monitor the connected power supply. 

Key Features:

• Always-on Standby outputs simplify accessory powering and reduce clutter
• GPIO input connector provides remote control of the main power output
• Large screw terminals support large wires and high power output 
• Convenient plug-in terminal blocks for Standby power and GPIO connections
• I2C interface for sensor data access (from PSU and onboard ADS1115)

Convenience and Flexibility: Always-On Power Outputs

Our breakout board features two always-on Standby outputs (5V and 12V) to power various accessories without the need for additional components. The "Standby" outputs are completely independent of the main 12v output and remain powered as long as the connected power supply has AC wall power. This feature streamlines your setup process and reduces the clutter of multiple power supplies or external voltage regulators.

Control Your Way: Push-Button or GPIO Input

The board includes a latching push-button that allows easy cycling of the main 12v power output with the touch of a finger. For remote control, there is a voltage sensing GPIO connector as well as a 3.3v output for relays or external switches - giving you unparalleled flexibility in your project design!
It is no longer necessary to use smart outlets or relays to control your power supplies on the AC side, increasing safety by utilizing lower voltage DC instead.

Unparalleled Power Handling: Heavy-Duty Construction

Our Breakout Board boasts thick copper traces and heavy-duty screw-terminals capable of handling massive current flows up to 100 amps, divided among the six fused outputs. This means no more worrying about power limitations holding back your project!

Unlock Your Project's Potential with I2C Interface Access

Data like never before! Our Breakout Board provides a convenient I2C interface that enables communication and data retrieval from internal sensors within the HP Server Power Supply (PSU) and an onboard ADS1115 ADC. This feature opens up new possibilities for monitoring, logging, or even custom automation in your project.

Two Different Styles to Fit All Use Cases

Choose from the standard Horizontal board to maintain a low profile, or go with the Vertical board to save on overall length. Either way, our Breakout Board will help make your project come to life!

Specifications:

Dimensions:

• Horizontal: ~128.75mm x ~59.25mm (about 5" x 2.3")
  -Installed on PSU: ~128.75mm x ~292mm (about 5" x 11.5")
• Vertical: ~119mm x ~78mm (about 4.7" x 3")
  -Installed on PSU: ~119mm x ~247.65 (about 4.7" x 9.75")

12v-Main Output:

• Rated to handle 100 amps TOTAL across all terminals
• Rated 20A Max per fuse
• Large screw terminals can securely hold heavy power wires with ease (Tested to securely hold two 12AWG wires under each screw!)

Standby Outputs:

• 5v: Poly-fused, 3 amps continuous (Custom onboard switch-mode buck-converter circuit with very fast rise time)
• 12v: Poly-fused, 1.1 amp continuous (Provided by the attached PSU)
• 3.5mm pluggable terminal blocks for easy wiring

GPIO Input:

Recommended voltage of 2v to 12v. The board will tolerate higher voltages, (ie 24v), but long-term use at higher voltages may cause damage and is discouraged.

• NOTE: GPIO Input voltage must be positive and referenced to GND on the Breakout Board!

3.3v Output:

Internal, current-limited (~10mA) output for use with a physical relay, or external switch, looped to the GPIO Input.

I2C Interface:

(PH2.0, 4-pin) Provides poly-fused 5v output (1A continuous), ground, and SDA/SCL connections for power supply and ADS1115 communication in a single plug.

• NOTE: The SDA and SCL pins are 3.3v ONLY. Connecting 5v I2C will cause damage to the Breakout Board and/or connected Power Supply. Use a level-shifter if your application does not have 3.3v I2C communication (ie Arduino/ATMEGA)

ADS1115:

(I2C address, 0x48)

• Ain0: Directly measures main 12v current via the PSU's internal current shunt (26.25mV per amp on the main 12v output)
• Ain1: Directly measures 12v main voltage (Voltage divided, 3.75:1)
• Ain2: Directly measures 12v standby voltage (Voltage divided, 3.75:1)
• Ain3: Directly measures 5v standby voltage (Voltage divided, 1.667:1)

Push Button:

Basic explanation: Conveniently cycle the 12v main output by simply pressing the onboard push button. The button is a latching switch, it will never reset on it's own due to power loss. 

Advanced explanation: Internally, the push button "inverts" the breakout board logic of the GPIO connector.

Typically, the Breakout Board defaults with the 12v main output Off, requiring voltage to be applied to the GPIO connector to turn it On.

However, by cycling the Push Button, the logic is inverted: the Breakout Board now defaults the 12v main output to On, requiring voltage to be applied to the GPIO connector to turn it Off.

This design allows for flexibility when using Microcontrollers (Arduino, ESP8266/ESP32, etc.) or Single Board Computers (BeagleBone, Raspberry Pi, etc.) that might boot with certain GPIO pins in a specific state (ie HIGH).

Compatibility: 

Expected compatibility with most HP Common-Slot Server Power Supplies: 
Blue text indicates a model that Alkly Designs has directly confirmed compatible.
Black text indicates a model that we have not directly tested, but should still be compatible.

• 460 watt:
  DPS-460EB A
  DPS-460MB A
  HSTNS-PD14
  HSTNS-PL14
  HSTNS-PL23B
  HSTNS-PL28
  HSTNS-PR28-AD
  HSTNS-PL28-AD

• 750 watt:
  DPS-750RB-A
  DPS-750AB-3 A
  DPS-750AB-4 A
  DPS-750UB B
  DPS-750UB B
  HSTNS-PL12
  HSTNS-PD18
  HSTNS-PD22B
  HSTNS-PD29
  HSTNS-PL29
  HSTNS-PL29-AD
  HSTNS-PD31
  HSTNS-PL34

• 1200 watt:
  DPS-1200LB C
  DPS-1200FB A
  DPS-1200FB-1 A
  DPS-1200SB A
  HSTNS-PD11
  HSTNS-PD19
  HSTNS-PD30
  HSTNS-PL30
  HSTNS-PL33

This is not an exhaustive list of power supply models. There is no guarantee that a model we haven't directly tested will work with the Breakout Board.

WARNING:

Server power supplies can deliver huge amounts of power. NEVER place the breakout board on anything conductive (Including Anti-Static bags) when attached to a power supply.

Match the fuses to the appropriate power capabilities of the wiring used to prevent fires.

Use of a Breakout Board is At-Your-Own-Risk:  Alkly Designs holds zero liability for harm or damage as a result of using this product.