61 WJ-SX550A/B/C Matrix Switcher Control Connections(1) Connect the MONITOR OUT connectors on the rear of the WJ-SX550A/B/C to the VIDEO IN connectors 1 to 4 on therear of the WJ-NT104.(2) Connect the RS-232C ports (of WJ-SX550A/B/C and WJ-NT104) with a RS-232C cable. You can also connect theCONTROL DATA port on the rear of the WJ-SX550A/B/C to the RS-485 connectors on the rear of the WJ-NT104.• Random Input Selection ModeFor VIDEO INPUT SELECTION MODE under OPERATION MODE SELECT, mark RANDOM INPUT SELECTION MODE.Unless a user changes channels, the last selected channel is used to continue transmission.The image transfer speed is higher than in Multi Input Selection Mode.O P E R A T EMatrix Switcher WJ-SX 550550LINK RCV XMTOPERATENetwork Interface Unit WJ-NT1041111PCPCPCPCWJ-NT104WJ-SX550A/B/CMON1 MON2MON1 MON2MON1 MON2MON1 MON2MonitorOut 1MonitorOut 2MonitorOut 3MonitorOut 4• Multi Input Selection ModeFor VIDEO INPUT SELECTION MODE under OPERATION MODE SELECT, mark MULTI INPUT SELECTION MODE.This mode switches periodically between multiple channels at high speed so that transmission to two or more usersrequesting different channels is possible.The image transfer speed is lower than in Random Input Selection Mode.O P E R A T EMatrix Switcher WJ-SX 550550LINK RCV XMTOPERATENetwork Interface Unit WJ-NT1041234PCPCPCPCWJ-NT104WJ-SX550A/B/C MonitorOut 1MonitorOut 2MonitorOut 3MonitorOut 4MON1MON2MON3MON4RS-232CDB25 DB98 ...................... 13 ...................... 22 ...................... 320 .................... 47 ...................... 56 ...................... 64 ...................... 75 ...................... 822 .................... 9Data Port (WJ-SX550A/B/C)Pin No. Designation1 Ground2 R(B)3 R(A)4 T(B)5 T(A)6 GroundRS-485R(B) ............ T(B)R(A) ............ T(A)T(B) ............ R(B)T(A) ............ R(A)