User guide
RM312 User Guide  ii  19" Rackmount Chassis 
Contents 
YOUR RACKMOUNT CHASSIS........................................................................1 
FEATURES.......................................................................................................1 
SPECIFICATIONS ...............................................................................................2 
LAYOUT..........................................................................................................3 
INSTALLATION..............................................................................................5 
FOR YOUR SAFETY .............................................................................................5 
PARTS LIST.....................................................................................................6 
 INSTALLING HARD DISK DRIVES (HDD).............................................................8 
 INSTALLING AN INTERNAL HDD.......................................................................8 
 INSTALLING A FDD......................................................................................9 
 INSTALLING A SLIM CD/DVD-ROM..................................................................9 
 CHANGING THE 80MM SYSTEM FANS ...............................................................10 
 INSTALLING THE BACKPLANE (OPTIONAL ITEM) ...................................................11 
 INSTALLING A MOTHERBOARD (OPTIONAL PART)..................................................13 
 INSTALLING THE POWER SUPPLY UNIT (OPTIONAL DEVICE).....................................13 
 INSTALLING THE GENERAL RACK RAIL KIT (OPTIONAL PART)...................................14 
 INSTALLING THE BEZEL ...............................................................................15 
BACKPLANE BOARD.....................................................................................16 
RAID BACKPLANE SUPPORTS:..............................................................................16 
BACKPLANE LAYOUT .........................................................................................17 
PIN ASSIGNMENTS...........................................................................................18 
LED BOARD..................................................................................................20 
FEATURES.....................................................................................................20 
LED BOARD LAYOUT........................................................................................21 
PIN ASSIGNMENTS...........................................................................................22 
APPENDIX A................................................................................................24 
OPTIONAL CABLES...........................................................................................24 
APPENDIX B................................................................................................25 
POWER CORD PLUG OPTIONS..............................................................................25 
NOTICES......................................................................................................26 
CONTACT INFORMATION............................................................................27 
HEADQUARTERS ..............................................................................................27 










