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RDC125-5S

Product catalog summary

Overview: The document provides technical specifications and operational procedures for a differential current sensor used in EV-charging, compliant with IEC62955-1:2018 and UL2231-2 Ed.2 standards. It is designed for stationary and mobile applications, such as wallboxes and personnel protection systems for electric vehicles.

Description: The sensor is a fluxgate current sensor with a toroidal core for PCB mounting, offering high accuracy, switching open-collector outputs, and a compact design.

Electrical Specifications: It operates with a primary nominal RMS current of 80A for single-phase and 40A for three-phase systems, detecting rated residual operating currents of 6mA DC and 20mA RMS.

Performance Data: The sensor has a measuring range of ±300mA, a resolution of less than 0.2mA at 25°C, and a frequency range from DC to 2kHz, operating within -40°C to 85°C.

Mechanical and Connection Details: Features specific pin configurations for power supply, ground connection, UART interface, and test winding, requiring a supply voltage of 4.8 to 5.2 VDC and a supply current of 33mA RMS.

Functional Description: Detects AC and DC fault currents, triggering state changes in output pins to indicate faults, requiring an additional driver circuit for load switching or circuit breaker activation.

Testing and Calibration: Regular functional tests are recommended, with a test winding for internal testing and guidelines for current application to avoid damage.

Safety and Compliance: Constructed according to IEC60664-1:2020 standards, with specific insulation and clearance requirements, pending UL certification, and complies with UL 2231.

Application and Usage: Can be used without a UART interface, with regular functional tests via a low-level signal on the RxD-T terminal, maintaining specific voltage levels during testing.

Limitations and Recommendations: Outlines maximum ratings for voltage and current, emphasizing that exceeding these limits may cause permanent damage, with guidelines for environmental conditions and requalification tests.

UART Interface Specifications: Includes address range, configuration, message format, data direction, voltage signals, transmission distance, and data rate.

Message Protocol: Describes general message format, specific messages like 'Get Measurement and Status' and 'Start Functional Test', and communication timing.

Error Handling: Each message includes a 16-bit checksum for integrity verification, with retry protocols for CRC errors.

Status Bytes: Details status bytes indicating general faults, test modes, ASIC faults, and reserved future use.

Catalog excerpts

VACUUMSCHM ELZE Copying of this document, disclosing it to third parties or using the contents there for any purposes without express written authorization by use illegally forbidden. Any offenders are liable to pay all relevant damages

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VACUUMSCHM ELZE Customer: Standard type Vceo Collector-Emitter voltage (PINs 6 and 7) Icc,max Collector current (PINs 6 and 7) Vcc Maximum supply voltage (without function) UMax Maximum rated insulation voltage Vtest-in, low TEST-IN Input Voltage, low level Vtest-in, high TEST-IN Input Voltage, high level (6)Stresses above these ratings may cause permanent damage. Exposure to these conditions for extended periods may degrade device reliability. Functional operation of the device at these or any other conditions beyond those specified is not supported. The values described here refer only to the...

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VACUUMSCHM ELZE Customer: Standard type Internal test cu rrent Proposed time to check M4: 2200ms Check for welded contacts. Time for offset calibration. Time required to store the offset calibration value. Depends on the difference to the value already stored in memory. points in time to check output levels Fig. 5:UL2231 response value over frequency Copying of this document, disclosing it to third parties or using the contents there for any purposes without express written authorization by use illegally forbidden. Any offenders are liable to pay all relevant damages

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VACUUMSCHM ELZE Customer: Standard Tab. 1: Possible output states Tab. 2: Maximum and typical values of break time for residual direct currents Copying of this document, disclosing it to third parties or using the contents there for any purposes without express written authorization by use illegally forbidden. Any offenders are liable to pay all relevant damages

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Differential Current Sensor for EV-charging acc. to the partly combined standards IEC62955-1:2018 and UL2231-2 Ed.2 Customer: Standard type Typical application diagram using UART-interface: Fig 6: UART Typical Application with Master Figure 6 explains the typical application for the sensor with additional Master to interface the sensor. In this system, the interface-signals TxD and RxD are cross connected (Master TxD -> Sensor RxD; Master RxD -> Sensor TxD). The master addresses a sensor by sending a message acc. to the protocol described in chapter Serial Data Interface (UART The sensor monitors...

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