Miniture Slip Ring The PSR-Ms slip ring miniature capsule is a standard,off-the-shelf series product with Miniature size, that uses gold contacts at the rotary interface. Color-coded lead wires are used on both the stator and rotorfor simplified electrical connections.. Using a 90o V-groove ring design for each ring, the PSR-Ms provides smoother running, lower torque low contact wear rates than competitive slip ring. PSR-Ms include PSR-M6, PSR-M8, PSR-M12 slip ring model, provides 6, 8, 12 circuit configurations.