EQUINOX SYSTEMS, INC. MEGAPLEX/2 MCC/2 24X4, MEGAPLEX/RS MCC/RS 24X4 Card Type Cluster controller Chip Set Unidentified I/O Options Cluster ports (4) Data Bus MCA [Image] CONNECTIONS Function Label Function Label Cluster port 1 CN1 Cluster port 3 CN3 Cluster port 2 CN2 Cluster port 4 CN4 DIAGNOSTIC LED(S) The function of the LEDs is unidentified.