One of the more common questions that we get about the ISIS Intelligent Multiplex System is what to do with high-current loads. When you wire a car, most of the loads or accessories draw 10 to 20 amps. This includes headlights, turn signals, ignition systems, starter solenoids, etc. Each of the outputs on a POWERCELL can carry up to 25-amps and the total capacity of a POWERCELL is 125-amps.
Occasionally, you do have have switched loads that exceed 25-amps. The most common example would be cooling fans but other examples could include electric power steering pumps, and very high-flow fuel pumps.
You can get the same ISIS benefits for these high-current loads as you do with ones under 25-ammps. Instead of driving the loads directly, you can use the output from the POWERCELL to power the coils of a relay. This allows the contacts of the relay to carry the full current of the load. You can size the relay to meet the demand.
Click here to download a simple schematic from the www.isispower.com website that shows you how you can use a relay with a POWERCELL output to increase the current carrying capability of the system.
You can check our reference library for additional tips and tricks to make wiring your car easier with the ISIS Intelligent Multiplex System.
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