Sure Power 1315A Battery Separator

UNIT CONNECTIONS The unit has five connections (see Connection Diagram for locations): 1. Main Battery connection This is the high current connection to the main battery. This connection is made directly to the relay. Product labeling refers to this as the MAIN BAT connection. The unit is powered from the main battery connection or the auxiliary battery connection, drawing power from whichever has the higher voltage. 2. Auxiliary Battery connection This is the high current connection to the auxiliary battery. Product labeling refers to this as the AUX BAT connection. The unit is powered from the main battery connection or the auxiliary battery connection, drawing power from whichever has the higher voltage. Note: For the 1315 model, the battery connections can be reversed. 3. Ground This is the unit ground connection. 4. Start Signal input This is the input for engine start signal override. When power is applied to this input, the relay will close if the Aux. Battery is no less than 0.85 Volts below the Main battery. 5. Start Lamp output This is the start lamp drive output. The start lamp is powered when the start signal input has caused the relay to close. This output can source up to 250mA to an incandescent lamp. For LED type indicator, see MAXIMUM RATINGS, START LAMP drive current.