This option allows the user to specify the function of the Multi-Purpose Input signal(s).
Note: At least +12v must be applied to this line to activate it.
Available Functions:
Keep Awake / Ignition Input: When this line is activated the BMS will treat it as a redundant keep-alive line (that is, it will not enter sleep as long as the Always-On line is energized). This can be useful in the event that the primary power pin(s) accidentally becomes disconnected or cut.
Clear Error Codes: When this line is activated the BMS will clear all pending Diagnostic Trouble Codes (DTCs).
Alternate Charge Current Limit: When this line is activated the BMS will use the Alternate Charge Current Limit value for the maximum charging current when the Charge Power signal is active. This is useful if the application requires a different maximum charge current limit for the charger depending on what voltage the charger might be plugged into.
Alternate Minimum Cell Voltage: When this line is activated the BMS will use the Alternate Minimum Cell Voltage value (specified in the utility when this option is selected) for the minimum allowable cell voltage when the Multi-Purpose Input signal is INACTIVE (off). The Alternate Minimum Cell Voltage value must be higher than the actual Minimum Cell Voltage value programmed in to the BMS. Once the Multi-Purpose Input signal is raised high (ON) then the BMS will revert to enforcing the actual Minimum Cell Voltage value. This can be useful if the operator wants to momentarily allow the pack to be discharged further than normal under certain circumstances.
Speciality Function: Some multi-purpose input pins have speciality functions, such as J1772 pilot, J1772 proximity or fan input voltage measurement.
Charger Plugged In Status: This tells the BMS whether an external charger is plugged in and available (useful for putting the BMS into charge interlock mode by a secondary signal if the Charge Power input is not available).
Alternate Maximum Cell Voltage: When this line is activated the BMS will use the Alternate Maximum Cell Voltage value (specified in the utility when this option is selected) for the maximum allowable cell voltage when the Multi-Purpose Input signal is INACTIVE (off). The Alternate Maximum Cell Voltage value must be lower than the actual Maximum Cell Voltage value programmed in to the BMS. Once the Multi-Purpose Input signal is raised high (ON) then the BMS will revert to enforcing the actual Maximum Cell Voltage value. This can be useful if the operator wants to momentarily allow the pack to be charged to a lower voltage than normal under certain circumstances (say for long term storage or anticipation of significant upcoming regenerative braking). *High Voltage Interlock Safety Input: When at least one multi purpose input pin is assigned to this function, the BMS will inhibit or open the main contactor(s) if this circuit goes LOW for more than 200ms. A corresponding Diagnostic Trouble Code is set if this happens.
Disabled: Use this function to ignore or otherwise disable the multi purpose input from activating any logic inside the BMS.
Start Precharge Sequence: If precharge is enabled on the BMS, this input type can be used to manually begin the precharge activation sequence. See the "Precharge Settings' screen for more details.