Pluggable module

A power supply system, comprising:

• a power busbar;
• and
• a pluggable module comprising
• a power control unit,
• an interface unit,
• a monitoring unit, and
• a signal linkage unit comprising a bracket, a pull ring, having an open section and plurality of gear structures, a signal switch and a damping mechanism, wherein the power control unit is connected to the interface unit, and the pluggable module is inserted into an external device by using the interface unit, one end of the pull ring is rotatably connected to the bracket, the other end is configured to trigger the signal switch, and
• when the pull ring is in an ON state, the signal switch is triggered to send a first switch signal, or
• when the pull ring is in an OFF state, the signal switch sends a second switch signal;
• and the monitoring unit is connected to the power control unit and the signal linkage unit, and is configured to control, upon receiving the first switch signal, the power control unit to be powered on, or control, upon receiving the second switch signal, the power control unit to be powered off;
• wherein the pluggable module is pluggable to the power busbar.