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figure 12. Side View of Proper RJ Cable
New 8A Control Board Additional Features
Manzanita Micro improved the original charger control interface board and began
integration into production models in mid 2010. If your charger is equipped with the
new control board it will be evident by the new front faceplate which has an extra 4
pin RJ port in between the ‘POWER’ and ‘WARN’ indicators.
Behind the blue face plate panel there are now 3 additional potentiometers which
can be adjusted to allow for two extra peak voltage settings and one extra amperage
setting. Old chargers only had the one “VOLTS TRIM” potentiometer which adjusts
the main default peak charging voltage channel “A”. The new functions attached to
the new 4 pin RJ connection can be controlled as follows:
1. Pin 1
is for voltage channel “B”. If +12 volts is applied to pin 1 using pin 4 as the
ground, then the charger will accept the peak voltage setting of the RV7 pot.
2. Pin 2
is for voltage channel “C”. If +12 volts is applied to pin 2 using pin 4 as the
ground, then the charger will accept the peak voltage setting of the RV8 pot.
3. Pin 3
is for the optional amperage channel. If +12 volts is applied to pin 3 using
pin 4 as the ground, then the charger’s main “AMPS” knob will be overridden and
amperage setting of the RV9 pot will be substituted.
4. Pin 4
is the ground return line and is the leftmost pin when viewing the front of the
charger head-on. For more details, refer to figure 13 and the table below it.