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Freedom Sequence Operational Concepts
Freedom Sequence Interaction with Other Xanbus Devices
Battery Voltage Measurement
The Freedom Sequence power manager measures the battery voltage from
the DC power terminals of the auxiliary connector port. If Xantrex devices
exist on the Xanbus network, the power manager will use the battery
voltage reported by these devices in a preferential order by source as:
Battery monitor >> charge controller >> inverter/charger
Generator Run Detection B+ Signal
Freedom Sequence detects the B+ signal via the presence of a Xanbus AGS
on the Xanbus network or through the presence of +12V on B+ signal wired
to the auxiliary connector port. If the B+ signal from either source is
detected to be high, the Freedom Sequence assumes the generator is On.
Freedom SW Interactive Charger De-rating (ICD)
The use of Freedom Sequence on an RV along with Freedom SW 3012 or
Freedom SW 2012 inverter/charger can further optimize the usage of
available power. An inverter/charger draws current from the AC source
only when it is in a non-inverting mode (that is, bypass only or charging
with bypass mode). The inverter/charger is usually connected directly to a
distribution panel and therefore Freedom Sequence cannot have any direct
control over the current drawn by charger or bypass loads. However, if the
inverter/charger is a Xanbus-enabled device and is programmed to support
Freedom Sequence, then the current draw by the charger can be regulated to
assist in optimizing the use of available power.
For example, in a typical operating case, Freedom Sequence continually
monitors the current usage of the AC source. The difference between
current clamp settings and current draw from the AC source is defined as
the headroom current or “available capacity”. Freedom Sequence
continually broadcasts this information on the Xanbus network. It is
possible to reduce the AC current used for charging batteries to a level that
allows other loads with intermittent current needs to operate. As the charger
continuously listens to the available capacity reported by Freedom
Sequence and controls its current draw for charging, the available capacity
remains minimum but never negative. The charger will discard derating
charger current if the battery is in a state of equalizing.
Freedom SW AC Disqualify On Request (ACDR)
ACDR is a feature that allows Freedom Sequence to send a message to the
inverter/charger to stop drawing current in bypass and charger mode. And if
the inverter mode is enabled, then the loads connected to the inverter will be
powered from the inverter/charger’s connected battery. The purpose of
ACDR is to reduce current draw from the input AC source and instead use
stored energy from the battery.
FSequence IPM Owners Guide.book Page 39 Thursday, October 6, 2011 3:33 PM