Mini-DIN 4-pin connectors with flanged, panel mounting. Dimensionally, mounting is the same as the Neutricon RP8, with a flange 27.0(h) x 20.0(w)mm, panel hole 17.4mm, mounting centres 20.0 x 13.0mm. Termination is via 4-way screw terminal block (jewellers screwdriver required).