Description The User Switch 481 has 3 programmable buttons that allow users to easily change the operating scene or allow users to enable / disable tN4 setpoint controls on a tN4 system. Multiple User Switches are required if more than 3 scenes or setpoint enable / disables are desired. The 481 has 3 output relay contacts that allow for connection to alarm systems or paging systems to alert service personnel. The output relay contacts can also be used to indicate the scene of the tN4 system to an automation system.