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Features
The NE872A module has the following features:
• Status LED: Tri-colored LED that illuminates according to following conditions
In addition, the following conditions will illuminate the LEDs as described below. This assumes the external disconnect
switch is used to open and close the battery charging path to the batteries.
Alarm Inputs: The NE872A can be referenced to either Vbus (-) or Vbus(+) so it can be used in both
positive and negative grounded systems. All alarm or control inputs are either alarmed on an open or a
closure to VBus(-) or provide its own signal return as described below:
• Remote LVD Open: The NE872 has the ability to accept a dry contact closure that will allow an external controller to
force open the LVD independently from the system controller. The contactor will remain disconnected as long as
the input is asserted. Upon de-asserting the input contactor closure, the NE872 will return the LVD to the a state
dictated by the controller.
• Fuse Alarm Major: A contact closure to the non-grounded “Battery” side of the DC bus (- 48V/±24V) applied to this
respective input, by default, produces an “Fuse Alarm Major” alarm by the controller.
• Open String: A contact closure to the non-grounded “Battery” side of the DC bus (-48V/±24V) applied to this
respective input, by default, produces an “Open String” alarm by the controller.
Green Amber Red Condition
Flashing
Condition Red Green Amber
Flashing
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