Smart Battery Isolator 48525 & 48530 Operation 1. The two batteries are electrically connected together when either battery voltage is above 13.2V for 2 minutes (e.g. during charging). 2. The two batteries are isolated when both battery voltages are below 12.7V for 1 minute. 3. The BOOST function connects the two batteries to provide more starting energy. • To enable the BOOST function, connect the violet wire to 12V DC via a momentary switch or through the ignition switch. 4. The STATUS indicator and the on-board LED are turned on when the two batteries are connected together. Connections 1. Disconnect the battery or switch it off with the master disconnect switch before installation. 2. Connect the 48530/48525 MAIN BAT + stud to the positive terminal of the main battery (also called starting battery or chassis battery). Use appropriate heavy gauge cable and proper fusing. 3. Connect the 48530/48525 AUXILIARY BAT+stud to the positive terminal of the auxiliary battery (also called the coach battery). Use appropriate heavy gauge cable and proper fusing. 4. Connect black “Ground” wire to ground. 5. Optional circuit connections: • Connect violet “Boost” wire to a normally open momentary switch. Connect the other side of the switch to +12V DC. • Connect white “Status” wire to a 12V DC, 50mA max. audio/visual alarm. Connect the other side of the alarm +12V DC. • Unused wires should be capped or otherwise insulated from active circuitry. 6. Reconnect the batteries. General Specifications Environmental: Electrical: Accuracy: Power Studs: Wire Connections: Mounting: Dimensions: SAE J1455 and J1113 9-16V DC 200A/85A continuous 750A inrush 8mA quiescent current +/- 100 mV 5/16” -24 copper studs Active High, 250mA a. violet-BOOST b. black-GROUND c. white-STATUS 5/16”x19/32” on 2 13/64” centers (7.9 x 15.1 on 56 mm centers). 3.4” x 3.4” x 3.1” Littelfuse Commercial Vehicle Products www.colehersee.com www.littelfuse.com IF-161 Rev E Cole Hersee Accessories for your Smart Battery Isolator Littelfuse Commercial Vehicle Products www.colehersee.com www.littelfuse.com IF-161 Rev E