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900-0093-12-00 Rev C
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Programming the Auxiliary Relay
The FLEXnet DC provides an auxiliary (Aඝච) relay to activate a DC accessory like a ventilation fan or light.
The Aඝච relay is a "dry contact" that does not supply power. The contacts are rated at 5 amps @ 30 Vdc.
The relay requires appropriate sized wiring and overcurrent protection. Note that damage due to unprotected
relay devices is not covered by the warranty.
Confi guring and monitoring is done with the MATE3s system display (or OPTICS RE). See page 6 of this
document for specifi c steps to access the relay settings in the MATE3s.
FLEXnet Relay Mode
This menu allows the user to turn the Aඝච relay on or off ,
either manually or using automatic criteria.
○ Status — The Relay output status is controlled by the
<Off>,<Auto>, and <On> soft keys.
● <Off> deactivates the relay and prevents any of the FLEXnet Relay Set Points options from working.
Note that even if the relay output is set to <Off>, it may still be activated by an external option
such as AGS.
● <On> activates the relay immediately. Its contacts will remain continuously closed until <Off> is selected.
● <Auto> activates the relay based on user-selected battery voltage, percentage of SOC, delay times, and
invert logic settings. In the FLEXnet Relay Set Points menu, six user adjustable set points govern the
control logic of Auto mode:
◘ Voltage: High — 0 to 99.9 Vdc
◘ (Voltage) Low — 0 to 99.9 Vdc
◘ SOC: High — 0 to 100%
◘ (SOC) Low — 0 to 100%
◘ Delay: High — 0 to 240 minutes
◘ (Delay) Low — 0 to 240 minutes
○ Invert Logic — N (no) or Y (yes).
This switches the relay‘s function from N.O. (a normally open state) to N.C. (a normally closed state). Since
the default condition is N.O., the N selection means it remains in this state. Selecting Y inverts the logic to
N.C. The relay will close with an audible click when this occurs.
Operation Operation
FLEXnet Relay Set Points
This menu allows the user to adjust the criteria used by the
Auto selection in the FLEXnet Relay Mode menu.
○ Voltage: High — The relay will close upon reaching a specified high voltage level following the
appropriate delay.
○ (Voltage) Low — After the relay was closed according to the High voltage set point, it will open again
upon reaching a specified Low voltage level (following the appropriate delay; see below).
○ SOC: High — If voltage conditions are not met, the relay will close when the battery state of charge
(SOC) increases to a specified percentage following the appropriate delay.
○ (SOC) Low — After the relay was closed according to the High SOC set point, it will open again upon
reaching a specified low SOC level following the appropriate delay.
○ Delay: High — Sets the delay time before the relay closes due to a High set point. This applies to either
the SOC or voltage settings.
○ (Delay) Low — Sets the delay time before the relay opens due to a Low set point. This applies to either
the SOC or voltage settings.
Wiring Block
Vent Fan
Battery
NOTES
If the Voltage set points are not met, then the SOC set points are evaluated.
If SOC set points are not met, then no action is taken.
If either Voltage or SOC set points are met, then the Delay timer runs.
When the set points have been satisfied for a Delay time (either Delay: High for the Voltage: High
or SOC: High set points), or (Delay) Low for the Low set points) the relay is energized.
To defeat the Voltage set points and skip directly to using SOC, change Voltage: High to a very high
setting (higher than the operating range of the battery). Change Low to a similarly low setting.
NOTES
The following set points assume N.O. logic as described on the previous page. If N.C. logic is
used, all uses of the words “close” or “open” are reversed.
See the previous page for available setting ranges.
When the MA
TE3s Advanced Generator Start (AGS) function is active and set to control the
FN-DC Aඝච relay, it will override the set points shown here. For generator control, OutBack
Power strongly recommends using the AGS function rather than the FN-DC set points, as
described in the MATE3s literature.
Fuse
(5 A,
30 Vdc)
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