PC/104 Specifications Version 2.5
Most of the products on CubeSatShop are PC/104 “Bus Compatible”: some specifications may differ slightly from the PC/104 standard specification (such as position of the connector etc.), but a male or female PC/104 bus connector that meets both the mechanical and electrical specifications related to bus connector is provided. Moreover, there is no real “standard” in terms of the allocation of the pins used. Some differences may occur between different manufacturers and CubeSat products.
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CubeSat Kit Bus connector and electrical interface
|Connector name||Image||Intended Use||Height from PCB mount [mm]||Height below mounting interface [mm]|
|SSQ-126-21-G-D||Stack End Mount on bottom||8.5||2.4|
|SSQ-126-23-G-D||Stack Mount middle||8.5||9.6|
|ESQ-126-38-G-D||Stack Mount middle||11.05||7.3|
|ESQ-126-39-G-D||Stack Mount middle||11.05||12.2|
|TSW-126-07-G-D||Stack End Mount on top||3||5.8|
For payload power interfacing the main choices needs to be considered are the supply voltages required for the design and if the design and if the power should be supplied from an always-on line or a line with a serial power switch on the EPS. In this case the payload or subsystem may be powered on or off by sending the corresponding commands to the EPS.
The current rating per pin on the connectors is 3A.