The PS27 is the main DC adapter for Rolls it outputs 12Vdc @ 200ma. has a 6 foot cord with a DC connector on the end, tip negative barrel positive.

The Rolls PS27s is a 15 volt/ 200 milliamp power supply that was designed to provide clean, reliable power for Rolls devices, many of which are rated at 12 volt / 200 milliamp draw. The reason Rolls uses a 15 volt power supply is to provide ample power reserves for their devices and not stress the power supply. The devices have no problem connecting to a 15 volt power supply because they will only draw the power they need to operate.

MPN: PS27s
UPC: 675889002706

• Output 12Vdc 200ma.
  
• Input 120VAC 12VA
  
• Weight 6oz. 0.17Kg
  
• 2" X 2.5" X 1.5"
  
  
• 12VDC 200ma output
  
• 2.1 X 5.5mm tip -(neg) DC plug connector
  
• 6 foot cord from wall adapter