AO Option
Operation
The AO Option is designed for use with the VST Series of inverter power systems. The option will
bypass one 0 to 10 volt local dimmer switch as well as allow user-programmable setting of
emergency output lighting levels. Two load terminals as well as two dip-switch sets for
independent output settings are provided to allow 25%, 50%, 75% or 100% of nominal illumination
output during power outages. This outstanding level of control allows for fewer VST power
systems to be required in typical applications.
Option Connectivity
The AO option’s emergency output circuits may be used to power dimmable LED lighting loads up to
the maximum output capacity of the SPS system. Additionally, the override circuits allow the user to
select the power level the connected load will be operated at in emergency mode. Each override
circuit is controlled by DIP switches which determine the emergency output power level. Emergency
output can be set for 25%, 50%, 75%or 100% of maximum fixture illumination, independent of the
local dimmer switch position. This level of flexibility provides a highly efficient use of the system
output.
The outstanding features of the SPS Series systems provide additional connectivity and flexibility
features to the AO options. The system’s universal output allows for the powering of 120VAC and/or
277VAC loads and because the system’s output is a clean, sinusoidal waveform, load compatibility
issues are never a problem. Additionally, provisions are provided so that emergency loads can be
configured for normally-on, normally-off, combination or switched operation.
AO OPTION WIRING
