8
SR OPERATORS MANUAL
The resistor typically seen across the contactors big terminals
pre-chargestheltercapacitorsinthecontroller.Thisminimizes
arcing across the
contactor terminals
when closing.
INSTALLATION
Battery Voltage Resistor
12-36V 220-250 Ohm 10W
48V 470 Ohm 10W
72V 1000 Ohm 10W
Resistor & Diode
Mounting
Contactor Size Diode Diode Current
70A-200A Solenoid 1N4004 1A
400A-550A Solenoid 1N5408 3A
600A or larger Solenoid MR754 6A
The diode across the coil terminals safely dissipates the energy
when the coil is turned off. Installation Dependant, refer to
applicable drawing.