29 pin-out reference, 1 connector arrangement, 2 12v dc power input (2.1mm inlet) – Videoswitch Vi-K3 User Manual
Page 106: 3 monitor output (bnc), 4 rs232 (9-way female d-type, dce), Connector arrangement, 12v dc power input (2.1mm inlet), Monitor output (bnc), Rs232 (9-way female d-type, dce), Vi-k2/vi-k3 universal keyboard

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