Electrical connector

A method of establishing an electrical connection comprising:

• providing an electrical connector and a mating connector, the electrical connector including a body, a plurality of contact pins received in the body, a tab, and a collar for moving the tab, the mating connector including a plurality of pin receptacles and at least one key
• advancing the mating connector toward the electrical connector until the plurality of pin receptacles receives a respective one of the plurality of contact pins;
• and
• rotating the collar from a first position to a second position to move the tab radially relative to the body to block a path of the key.

An electrical connector comprising:

• a body, the body including retaining walls that define a body track, the body further including a keyway;
• a tab received in the body track;
• a collar disposed radially outward of the body and being rotatable relative to the body between a first position and a second position;
• and
• a cam mechanism for moving the tab radially inward and outward, the cam mechanism including pins that extend from the tab into cams slots provided on the collar, wherein the cam slots engage the pins to move the tab radially inward into the path of the keyway when the collar is rotated from the first position to the second position, and wherein the cam slots engage the pins to move the tab radially outward out of the path of the keyway when the collar is rotated from the second position to the first position.