Do not locate the C40 in a sealed compartment with the batteries. Batteries can generate
hydrogen sulfide gas which is very corrosive to electronic equipment and everything else.
They also generate hydrogen and oxygen. If accumulated, this mixture could be ignited by
an arc caused by the connection of battery cables, a loose terminal, etc. Installation within
a ventilated enclosure with sealed batteries only is acceptable.
Be sure to set the voltage selector jumper to the appropriate setting before energizing the
system (see for instructions). Incorrect settings may result in
damage to the system as the charging regulation will not occur. Torque the terminals to
25 inch-pounds once the wires have been installed. Replace the cover after wiring.
The minimum recommended wire gauge is 8 AWG (13.3 mm2) with a 75° C insulation
rating. The terminals on the C40 will accept up to #2 AWG (33.6mm2) copper or aluminum
wire. No crimp-on terminals or lugs are required. The following table gives the maximum
permissible length allowed for each wire size at 40 amps with 3% voltage drop. Find your
Wiring
User Configuration Options
NOTE: Regardless of configuration, only the positive conductor from a PV array or
a DC load may be connected to the terminal marked “PV POS/LOAD.”
Copyright Trace Engineering Co. Inc. Tel (360) 435-8826 Part Number 2680 Rev. C
5916 195 Street, NE Fax (360) 435-2229 November 4, 1998
Arlington, WA 98223 USA www.traceengineering.com Page
th
PV+/WIND+/LOAD+
Warning: Due to a printing error (what were we thinking?), the input
terminal on the C40 Rev. #2230D printed circuit board is incorrectly
labeled ‘PV+/WIND+/LOAD+.’ Never connect a wind generator to this
terminal. Rev.#2230D is not designed to accept the very large current
fluctuations typical of wind generators. Damage to the C40 will result.
Warning: Due to a printing error (what were we thinking?), the input
terminal
on the C40 Rev. #2230D printed circuit board is incorrectly
labeled
‘PV+/WIND+/LOAD+.’ Never connect a wind generator to this
terminal.
Rev.#2230D is not designed to accept the very large current
fluctuations
typical of wind generators. Damage to the C40 will result.
9