Number labeling of pins in these connectors is performed in two different ways. Most encoders have a built-in 12-pin base and are labeled anti-clockwise. The TSX TAP S15 has a 12-pin female base labeled anti-clockwise. All user cables must be equipped with connecting plugs labeled clockwise, so that the pin numbers correspond to one another when wired.

Shielding should be continuous along the connections which should be linked to the mechanical ground connection on both sides.