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The ISIS™ Intelligent Multiplex System vs. Million Mile and 1+1 Systems
The table below compares the main features of the ISIS multiplexed electrical system to those of the I Squared 1+1 system.
| Features | ISIS | 1+1 Mosfet Syste | Wiring Harness | ISIS Benefit |
|---|---|---|---|---|
| System is turnkey | Yes | Yes | Plug and play connectivity simplifies the installation and reduces the time required | |
| System Is field configurable | Yes | No | Allows the user to make changes to their system at any time. Greater flexibility. | |
| System is expandable | Yes | No | Limited ability to expand, based on number of wires left unused in the harness | Users can expand their systems as their needs change. |
| Custom Node profiles | Yes | No | No | Unlimited options for customization to make cars stand out. Also, functionality is included in the system so separate modules are not needed. |
| Features Common To Both Systems | ||||
| Self Canceling turn signals | Yes | Yes | No, separate components needed | Less components needed, simpler electrical system. Simpler switches. |
| Inputs can be wired logical (OR) or (AND) at installers discretion | Yes | Yes | No, separate components needed | Allows for greater functionality and customization of the system. Elminiates need for separate control modules. |
| NO HIGH CURRENT UNDER DASH WIRING | Yes | Yes | High current flows under the dash | Most common type of vehicle fires originate from under the dash. Total current needed to power a MasterCell is less than 250 mA |
| All switching functions use low voltage/low current (5 Volt - .0005 amp) circuit actuation. | Yes | Yes | No, high-current swithes are needed for larger loads | Smaller & lower cost swtiches can be used. |
| All inputs are ground- switched | Yes | Yes | Yes | Simplier electrical system |
| OEM style functions where multiple inputs controlled (enabled or disabled) commonly through ignition switch | Yes | Yes | Separate wiring required. | Higher levels of functionality, greater level of customization |
| FEATURE | ISIS | 1+1 MOSFET System | ||
| Processor Technology | CMOS - 16bit Digital Signal Processor - RISC | CMOS - 8 bit RISC Processor | N/A | Very powerful capable processor allows for more speed and flexibility. |
| Communication Protocols | Full CAN 2.0b - Proprietary Data Protocol. | CAN 2.0b Electrical - Proprietary Communications Protocol - Proprietary Data Protocol. | N/A | Standard industry communications that are proven as reliable. |
| Optional Interface Protocols | J1939 | None | N/A | Standard industry communications that are proven as reliable. |
| Maximum Data Rate on CAN Bus | 1M Bits/ Second | 16K bits/second | N/A | Fast response time to commands |
| Maximum Length of Can Bus cabling | 100 Meters | 10 Feet | Limited by harness length | Greater flexibility for wiring large vehicles |
| Maximum Number of Input/Output Nodes | 100s | 18 | Limited by number of wires in the harness | Greater flexibility for wiring vehicles with large electrical demands |
| Input Node Interface | Input signal is closed to ground | Input signal is closed to ground | Input signal is closed to ground | Simpler electrical system. |
| Maximum frequency of input state change/node | 50 Hz | 5 Hz | Limited by the relay used | Allows for electronic controls of functions. Fast response time to commands. |
| Maximum Number of Nodes/Output Module | 10 (expandable in groups of 10) | 18 (fixed) | Limited by number of wires in the harness | Greater flexibility for wiring vehicles with large electrical demands |
| FEATURE | ISIS | 1+1 MOSFET System | ||
| LED Diagnostic Indicators on each Output Node | Yes | Yes | None | Easy diagnostics and troubleshooting of installs |
| Indicates Open Fuse, Open Circuit, Normal Functions | Yes | Yes | None | Easy diagnostics and troubleshooting of installs |
| Indicator Color | White | Blue | None | Highly visible, easy to see |
| FEATURE | ISIS | 1+1 MOSFET System | ||
| Output Node Technology | MOSFET (up to 50 amps/node depending on model of ISIS Power Cell | MOSFET 23 Amps/ Node | Limited by the wire gauge and relay used | Covers almost all typical loads in a car. |
| Output Switch Type | High-Side | High-Side | Relay | |
| Analog Input Nodes/ Master Module | 2 | 0 | None | Greater system flexibility. Allows for fan speed control, light dimming, and other analogue functions |
| PWM Nodes/Power Module | 8 | 0 | None | Greater system flexibility. Allows for fan speed control, light dimming, and other analogue functions |
| FEATURE | ISIS | 1+1 MOSFET System | ||
| Software provisions to overcome possible Node failures due to loss of communications between cells | 2 - Stage continuous failure analysis for all outputs. Both loss of communications and inability to establish communications | 1 - Stage continuous failure analysis for all outputs. Loss of communications only. | None | Safe and reliable operation in case of catastrophic events to the car |
| Hardware Provisions to overcome possible node failures due to loss of system processor | All Outputs | 4 outputs | Electrical system performace becomes unpredictable if wires get damaged | Limp home ability. Vehicle can still be operated in case of major system failure. |
| FEATURE | ISIS | 1+1 MOSFET System | ||
| In-Vehicle Programmable | Yes | No | No | Allows the user to make changes to their system at any time. Greater flexibility. Changes can be made without removing the Cells from the car |
| On-Line Node Application Library | Yes | No | No, limited only to on-off functions | Simple programming. Standard code modules exist for typical vehicle functions |
| Any Node can Assume Any Personality | Yes | No | No | No dedicated outputs makes the wiring installation easier. |
| All Nodes Programmable | Yes - Library of application node personalities | No | No | No dedicated outputs makes the wiring installation easier. |
| Field Programmable | Yes - Library of application node personalities | No | No | Allows the user to make changes to their system at any time. Greater flexibility. Changes can be made without removing the Cells from the car |
| Field Programmer | No-Cost Loaner from Littelfuse | None | No | Simple, cost effective programming |
| FEATURE | ISIS | 1+1 MOSFET System | ||
| Environmentally Sealed | Yes - IP67 Rated | No | No | Higher reliability system. Greater flexibility for mounting options in the car |
| Temp rating ISIS Master Cell | 85 Deg. C | 85 Deg. C | N/A | Higher reliability system. Greater flexibility for mounting options in the car |
| Temp rating Power Cell | 125 Deg. C | 125 Deg C | N/A | Higher reliability system. Greater flexibility for mounting options in the car |
| Power Module installable in engine compartment | Yes | No | Depends on system | Higher reliability system. Greater flexibility for mounting options in the car |
| Housing - Sealing | Fully Sealed to IP/67 Spec | Not Sealed | Not sealed | Higher reliability system. Greater flexibility for mounting options in the car |
| Housing - Materials | Injection Molded Nylon | CNC cut Aluminum | Injected molded plastic | Automotive OEM approved materials. Can withstand thermal, chemical and mechanical stresses. |
| Housing - Thermal Rating | 125-Deg C | 125-Deg C | Depends on system | Higher reliability system. Greater flexibility for mounting options in the car |
| Connector Materials | Injection Molded Nylon/Metal | Injection Molded Nylon/Metal | Most are hard wired with no connectors | Automotive OEM approved materials. Can withstand thermal, chemical and mechanical stresses. |
| Power Connector Capacity | 150 Amps DC | 150 Amps DC | Depends on system | More power out of less boxes |
| FEATURE | ISIS | 1+1 MOSFET System | ||
| 433 MHz Radio Interface | Optional - Integrated | Optional - External | Separate module required | No separate module required. Radio board in user installable in the MasterCell. |
| Key Fob | Yes | Yes | Depends on system | Small, simple interface. |
| Key Fobs/System | 8 | 4 | Depends on system | Flexibility to add multiple transmitters. Individual transmitters can be programmed for specific user functions |
| Secure Transmission | 64 - Bit Rolling Code | 64 - Bit Rolling Code | Depends on system | Highly secure, cannot be cloned |
| Functions/Keyfob | 16 | 16 | Depends on system | Broad number of options for functions |
| Maximum Number of Controllable Functions from Key Fob | 16 | 12 | Depends on system | Broad number of options for functions |
| Radio functions are Node Programmable | Yes | No | No | Broad number of options for functions |
| Key Fob functions are independent from switch input node functions | Yes - any personality can be assigned to any Key Fob function | No | No | Greater system flexibility |
| FEATURE | ISIS | 1+1 MOSFET System | ||
| 900 MHz Radio Interface | Optional - Integrated | None | None | Higher capability radio protocol |
| Touch-Screen Interface | Yes | None | None | Very unique, differentiated option. Simplifies the dash with one interface. |
| Touch-Screen Range | 1 Mile - 3.5 Miles depending on radio module | N/A | Long distance control of vehicle functions | |
| Touch Screen is portable | Yes | None | N/A | Easily removed from the car, increases vehicle security |
| Approximate Battery Life between charging cycles | > 3 Hours | N/A | Long running system life between charges | |
| Battery Type | Lithium Ion Polymer | None | N/A | Long running system life between charges |
| FHSS | Yes | None | N/A | Highly secure, cannot be cloned, much more resistant to interference from other radio systems |
| CSMACA Protocol | Yes | None | N/A | Highly secure, cannot be cloned, much more resistant to interference from other radio systems |
| Functions/Touch Screen | 100s are possible | None | N/A | Unlimited flexibility for control through the wireless touch screen |
| Touch-Screen Radio functions are Node Programmable | Yes | No | N/A | Broad number of options for functions |
| Touch-Screen functions are independent from switch input node functions | Yes - any personality can be assigned to any Key Fob function | No | N/A | Broad number of options for functions |
| FEATURE | ISIS | 1+1 MOSFET System | ||
| LCD Alpha Numeric Diagnostic Screen (optional) | Yes | Single LED Character Display | No diagnostics available | Highly visible screen to see all system functions. Can check status of remote modules on the system. |
| Backlight | Yes | LED | No diagnostics available | Easy to read in all lighting conditions |
| Screen Color | Dark Blue with White Letters | None | No diagnostics available | Easy to read in all lighting conditions |
| Characters | 4 Lines - 16 Characters/Line | 1 | No diagnostics available | Lots of information available through the screen |
| Multi Function | Yes (4 function selector buttons) | No - Fixed Function | No diagnostics available | Easy to navigate through screen functions |
| Information is displayed as | English | Numeric Codes | No diagnostics available | Easy to understand and diagnose. |
