NEXSYS® Component Technology – Sensors & Detectors

Current Sensor

Current Sensor

The NEXSYS® Current Sensor was developed to enhance avionics design flexibility by offering undercurrent or overcurrent monitoring. This solid state device compares a sense input to a predefined set point and provides a discrete output signal that transitions from Open to Ground if the sense line is above or below the specified set point. The NEXSYS® Current Sensor is ideally suited for a wide range of applications since set point options span from 10 mA to 1000 mA (1.0 Amp) (see Input Specification for increments).

The component is either packaged inside of the VIVISUN® switch/indicator housing or a NEXSYS® Module. The NEXSYS® Current Sensor can also be combined with electromechanical switches and other NEXSYS® Component Technology to create custom configurations that uniquely address specific functional requirements.

The NEXSYS® Current Sensor is designed and tested to both military performance standards (MIL-STD) and commercial environmental requirements (DO-160).

  • Configurable inside of VIVISUN® High Capacity switch bodies and NEXSYS® Modules.
  • Detect DC current above or below set point
  • AVAILABLE LATE SUMMER 2019
Current Sensor Block Diagram

How it Works

Overcurrent Sensors

NEXSYS® Current Sensors can be specified to activate with Output = Ground (0) when sensed current is ABOVE the specified set point. The Open Drain Output is High Impedance (Open) when the unit is not energized or inactive. The nominal tolerance is +/- 3% of the specified set point with hysteresis band of +/- 0.16% around set point.

Undercurrent Sensors

NEXSYS® Current Sensors can be specified to activate with Output = Ground (0) when sensed current is BELOW the specified set point. The Open Drain Output is High Impedance (Open) when the unit is Off or inactive. The nominal tolerance is +/- 3% of the specified set point with hysteresis band of +/- 0.16% around set point.

Wide Hysteresis Configuration

NEXSYS® Current Sensors can be combined with a NEXSYS® Electronic Latch component to create a wide hysteresis solution with orthogonal outputs. This is desirable for systems requiring different pull-in and drop-out levels for added system noise tolerance.

Component Features

Input Specification

The Sense Input (Pin 3) set point options increase in 10 mA increments from 10 – 100 mA, and in 50 mA increments from 100 – 1000 mA (1 Amp).

Output Specification

The Z Output (Pin 1) is specified to transition from Open (1) to active Ground (0) either ABOVE the specified set point or BELOW the specified set point. The Output load capacity is 0.5A (Resistive).

Current Sensor – Application Examples

To help system designers understand the potential of NEXSYS Component Technology, we have assembled a collection of Application Notes. The links below show example applications that utilize the Current Sensor component.

Current Draw Sensor