Page 12 AXIS Q7900 Installation GuidePin assignments for the I/O Connector of the AXIS Q7900 RackNote: For I/O unit connector information for video encoders, refer to their respective Installation Guide for I/Oconnector information.Replacing a power supply1. Turn off the power supply that needs to be replaced.2. Loosen the screw located on the left side of the power supply and remove the power supplyusing the handle.3. Insert a new power supply and retighten the screw.4. Turn on the new power supply to begin using it.Pin AXIS Q7406 AXIS 243Q AXIS 241Q/S, AXIS 240Q12 Channel 6, Configurable I/O 2 NC NC11 Channel 5, Configurable I/O 2 NC NC10 Channel 4, Configurable I/O 2 NC NC9 Channel 3, Configurable I/O 2 NC NC8 Channel 2, Configurable I/O 2 Channel 4, Output1 Output47 Channel 1, Configurable I/O 2 Channel 3, Output1 Output36 Channel 6, Configurable I/O 1 Channel 2, Output1 Output25 Channel 5, Configurable I/O 1 Channel 1, Output1 Output14 Channel 4, Configurable I/O 1 Channel 4, Input 1 Input43 Channel 3, Configurable I/O 1 Channel 3, Input 1 Input32 Channel 2, Configurable I/O 1 Channel 2, Input 1 Input21 Channel 1, Configurable I/O 1 Channel 1, Input 1 Input1Screw Handle