WCS1700 70A Hall Current Sensor with Over Current Protection Module

WCS1700 70A Hall Current Sensor with Over Current Protection Module delivers isolated current measurement and fast hardware cut-off in one compact board. Integrators use it to sense bidirectional or unidirectional load current and to trigger an over-current output that protects motors, batteries, and DC rails in real time.

Key Features:

• Hall-Effect Isolation: Measures current without series shunt loss or heating.
• Wide Current Capability: Supports high DC or pulsed loads depending on busbar/trace rating.
• Analog Voltage Output: Provides a proportional V_OUT for MCU/ADC monitoring.
• Adjustable Trip Threshold: Onboard potentiometer sets over-current level.
• Fast Protection Output: OC pin asserts when current exceeds setpoint for quick shutdown.
• 5 V Logic Friendly: Works with common 5 V microcontrollers and PLC input stages.
• Reverse Polarity Safe Sense Path: Hall principle allows safe bidirectional sensing (module dependent).
• Noise Filtering: Pads provided for RC filter to stabilize V_OUT in PWM environments.

Technical Specifications:

• Sensing Principle: Linear Hall-effect current sensing (non-contact).
• Supply Voltage: 5 V DC nominal (typ. 4.5–5.5 V).
• Output Type: Analog voltage proportional to current; OC digital comparator output.
• Response Time: Fast analog response suitable for PWM and motor control (module dependent).
• Isolation: Galvanic isolation between primary conductor and signal path.
• Trip Adjustment: Multi-turn potentiometer to set over-current threshold.
• Calibration: Optional zero-offset trim via test pads or firmware offset.
• Operating Temperature: −40 °C to +85 °C typical (check module revision).

Mechanical Specifications:

• Module Type: Through-hole current path with screw terminals and 3-pin or 4-pin signal header.
• Connector Type: Pluggable terminal block for load line; standard 2.54 mm header for logic.
• Heatsinking: Copper trace or busbar acts as shuntless primary; size varies by current rating.
• Potentiometer: Board-mounted multi-turn trimmer for OC threshold.
• Mounting: PCB standoffs or enclosure mounting using provided holes.

Dimensions:

• PCB Footprint: Compact module form factor (exact size varies by vendor revision).
• Mounting Holes: Standard M2–M3 hole pattern on corners (verify drawing before production).
• Terminal Spacing: 5.0–5.08 mm pitch screw terminals for the current path.

Pinout and Wiring:

• Screw Terminals (Primary): IP+ and IP− carry the load current through the sensor path.
• Signal Header: VCC = 5 V, GND = Ground, VOUT = Analog output, OC = Over-current digital output (active on trip).
• Threshold Adjust: Rotate the trimmer to set the trip level; monitor OC while applying a known load.
• Filtering: Add an RC from VOUT to GND to reduce PWM ripple if needed.
• MCU Interface: Feed VOUT to ADC; use OC as an interrupt for immediate shutdown.

Datasheet Reference:

• Search for “WCS1700 datasheet” and the specific module revision to get electrical curves, sensitivity, and mechanical drawings.
• Use the module vendor’s application notes for calibration, filtering, and over-current setup.

Applications:

• Battery and DC Bus Protection: Trip loads when current exceeds safe limits.
• Motor Drivers and ESC: Monitor phase or DC link current and shut down on stalls.
• Solar and UPS Systems: Track charge/discharge current with isolated sensing.
• Industrial Controls: Add fast over-current interlocks to 24 V rails and actuators.
• IoT/Embedded Power: Log consumption and protect converters in compact designs.

Equivalent Models:

• ACS712 Module: Hall current sensor modules with analog output (various ranges).
• WCS1800 / WCS2702: Winson Hall sensors with similar linear analog output behavior.
• ACS758/ACS759: Higher-current Allegro Hall sensors for busbar applications.
• Note: Match range, sensitivity, supply, and footprint before substitution.

Package Includes:

• 1 x WCS1700 Hall Current Sensor Module with Adjustable Over-Current Protection