The PB24Q I/O mounting rack can accommodate up to six Quad Pak I/Omodules for a total of 24 I/O channels. The PB24Q I/O mounting rack usesa 50-pin card edge connector for interface to computer parallel I/O ports viaa 50-conductor ribbon cable. The mounting rack features a replaceable5-amp fuse for each pair of I/O module positions. Status indicating LEDs aremounted on the Quad Pak I/O modules. All Quad Pak modules are designedto operate on 5 Volt logic. Additional InformationDatasheet