Personality Profile Element Definitions

PERSONALITY NAME: This is the name assigned to the specific personality within the ISIS system
OUTPUT FOLLOWS STATE OF INPUT DEVICE: This indicates if the personality type follows the state of the switch controlling it; meaning if the switch is ON the OUTPUT NODE will produce the function, if the switch is OFF the OUTPUT NODE will stop producing the function
PERSONALITY MODIFIERS: These are special control words that can modify the basic action of the personality and are as follows (not all personalities can be used with all MODIFIERS:

• SOFT START: This modifier will change the characteristics of how the OUTPUT NODE is started. For the first 500 milliseconds of the turn-on-cycle the output will be 50% Pulse Width Modulated to allow the load to come “on-line” without large current spikes in the vehicle or mechanical abuse to the filament in an expensive halogen bulb or damage to the brushes in BDC (Brushed Direct Current) motor. Using SOFT START on your headlights can double the life of the bulb and extend the life of the brushes in a D.C. motor..!

SWITCH DEBOUNCE TIME: This is the time that a mechanical switch is allowed to “bounce” internally before it’s state is read by ISIS for subsequent processing. All mechanical switches “bounce”. Almost any mechanical switch can be correctly read using a 10 millisecond debounce window. For special needs this value can be custom programmed for your system from 0 milliseconds to over 1 second. The 0 milliseconds option is used if you have electronic “bounce-less” inputs to your ISIS system. By reducing this number to 0, the overall system performance can be increased to manage over 50 state changes/input/second.

TYPICAL INPUT SWITCH TYPE: This defines the typical type of switch that would be commonly used in conjunction with the PERSONALITY being described. The conventions in calling out a switch of a specific type are as follows:

• SPST – This is the most common type of switch, also called an ON-OFF switch. The –SP- means that is has one set of electrical POLES, contacts, and –ST- means that the switch only has (2) active positions, ON and OFF. A “Toggle Switch” is a common form of a SPST switch.
• (SPST) aka MOMENTARY – This switch is identical to the SPST switch, except that if the switch is put in the ON position it will automatically return to the OFF position. This is also called a MOMENTARY switch. Whenever you see “( )” around a switch description it means THAT position is MOMENTARY. An example would be an ON-OFF-(ON) switch, also called a SPDT, Single Pole Double Throw switch. The ON position of the switch will remain in place until manually turned OFF.  The (ON) position of the switch is spring-loaded and will return to the OFF position as soon as the handle is released.
• DPDT – This is also called an ON-ON switch with 2 independent sets of poles with a common center position. This switch has to independent set of electrical poles inside the switch that can control 2 independent circuits. The single switch actuator mechanically ties the 2 independent poles together.
• SPDT – This is also called an ON-ON switch. This type of switch usually has 3 outer terminals, each position of the switch actuator controls a common center terminal and 2 independent outer terminals. The common terminal is why it is called –SP- or Single Pole.
• ON-OFF-ON, (ON)-OFF-ON, (ON)-OFF-(ON) – All of these switches have a single OFF position in the middle of the switch actuation positions and a 2 independent sets of contacts with a single common side. A good rule to remember if you are not sure which position of the switch handle turns on which circuit is that the handle is always in the OPPOSITE position of the active switch poles. As mentioned above the various uses of “( )” indicate momentary operation.

PERSONALITY DESCRIPTION: This describes how the personality functions and the possible various states that are created during it’s function on the POWRCELL™ power control unit. The DEFINITIONS for the personalities used in your system are ALL held on the MASTRCELL™ system control unit and are assigned to the POWRCELL control unit dynamically.

FUNCTIONAL RELATIONSHIP: This indicates 1 of 4 possible relationships that that the POWRCELL and MASTRCELL control units have with each other when a given type of PERSONALITY is applied to the system.

The 4 possible relationships are:

• 1 to 1: This means that a single input on the MASTRCELL control unit controls a single output on the POWRCELL.
• 1 to MANY: This means that 1 input on the MASTRCELL unit controls multiple outputs on a POWRCELL.
• MANY to 1: This means that many inputs on a MASTRCELL unit control 1 output on a POWRCELL control unit.
• MANY to MANY: This means that many inputs on a MASTRCELL control unit control MANY outputs on a POWRCELL control unit.

AS DEFINED ON A STANDARD SYSTEM: This tells you where the personality is found on a STANDARD off-the-shelf ISIS System. Almost ANY combination is possible. Contact Littelfuse Application Support if you have specific questions about a custom configuration.