The K-BUS Switch Actuator with Secure is a modular KNX/EIB device designed for building control systems. It allows for the switching of electrical loads and offers various functionalities for lighting, heating control, and signal devices. The device is available in different configurations, including 4-fold, 8-fold, and 12-fold versions, with options for 16A or 20A per output.
Function Description
The K-BUS Switch Actuator with Secure is primarily used to control electrical loads within a building automation system. It can switch 4 to 12 independent electrical AC loads or three-phase loads, with a maximum output of 16A or 20A per output and manual switch, as well as visible switching status. The device supports various operational modes and parameters, making it highly versatile for different applications.
Key functionalities include:
- Lighting Control: Switching on/off lights, staircase lighting with adjustable time functions, and scene control.
- Heating Control: Managing heating valves with continuous or 1-bit control, and monitoring heating actuator status.
- Signal Devices: Controlling various signal devices.
- Logic Operations: Performing AND, OR, XOR, and GATE logic functions based on input values.
- Scene Control: Storing and recalling up to 64 different scene numbers per output.
- Threshold Function: Activating outputs based on defined threshold values (Threshold 1 and Threshold 2) with or without hysteresis.
- Safety Function: Defining safety priorities for outputs to ensure safe operation in critical situations.
- Forced Operation: Forcing outputs to a specific state (on/off) regardless of other commands, with different priority levels.
- Time Functions: Delay switch, flashing switch, and staircase lighting functions with adjustable durations.
- Monitoring: Monitoring channel current and total current, total power of the device, and reporting fault status.
- Status Response: Providing feedback on the current status of outputs.
- Switching Counter: Counting the number of switching operations.
- Operation Hours Counter: Tracking the total operating hours of the device.
- Inversion of Outputs: Inverting the output status.
- KNX Data Secure: Ensuring secure communication within the KNX system.
The device also features a programming button and a red/green LED for indicating the physical address and application layer status. It supports manual operation via a switch.
Important Technical Specifications
The K-BUS Switch Actuator with Secure is designed for DIN-Rail mounting and adheres to EN60715 standards.
- Power Supply:
- Bus voltage: 21~30 V DC, via the KNX bus
- Bus current: <6.5mA/24V, <5.5mA/30V
- Bus consumption: <165mW
- Charging current: <20mA
- Output:
- Rated voltage: 250V AC(50/60Hz)
- Rated current (ARSA-xx/16.S): 16A (Only for ARSA-xx/16.S, xx=04/08/12)
- Rated current (ARSA-xx/20.S): 20A (Only for ARSA-xx/20.S, xx=04/08/12)
- Inrush current: 480A/2ms
- Output Life Expectancy:
- Mechanical endurance: >10⁵
- Electrical endurance (Resistive load): >10⁵
- Connections:
- KNX: Bus connection terminal (0.8mmΦ)
- Load output connection terminal: Screw terminal
- Cross section: 0.2~6.0mm²
- Operation and Display:
- Programming LED and button: For assignment of the physical address
- Green LED flashing: Indicate the application layer running normally
- Indication of the contact position: Close means the output is on, Open means the output is off
- Protection: IP20
- Safety Class: II
- Temperature:
- Operation: -5 °C ~+ 45 °C
- Storage: -25 °C ~+ 55 °C
- Transport: -25 °C ~+ 70 °C
- Ambient Humidity: <93%, except dewing
- Design: Modular DIN-Rail Component, 35mm Din rail, modular installation
- Dimensions (L x W x H):
- ARSA-04/16.S, ARSA-04/20.S: 72 × 90 × 64mm
- ARSA-08/16.S, ARSA-08/20.S: 144 × 90 × 64mm
- ARSA-12/16.S, ARSA-12/20.S: 216 × 90 × 64mm
- Weight:
- ARSA-04/16.S, ARSA-04/20.S: 0.35kg
- ARSA-08/16.S, ARSA-08/20.S: 0.60kg
- ARSA-12/16.S, ARSA-12/20.S: 0.85kg
The device supports various load types with specified rated power and life cycles:
- Incandescent lamp: 4000W (16A), 5000W (20A)
- Halogen lamp: 4000W
- Standard/Electronic ballast: 4000W
- Fluorescent lamp (uncompensated): 4000W
- Fluorescent lamp (parallel compensated): 2800W
- Motor: 2200W (16A), 3675W (20A)
- LED (Inrush current 470A/210us): 800W
Usage Features
The K-BUS Switch Actuator with Secure offers a wide range of configurable parameters through the ETS software, allowing for flexible adaptation to specific project requirements.
- Parameter Window "General": Defines the product type (4-fold, 8-fold, 12-fold), operation delay after bus recovery, sending cycle of "in operation" telegram, and enable safety priority function.
- Parameter Window "Time": Configures delay switch, flashing switch, and staircase lighting functions with adjustable durations (0...240 minutes, 0...59 seconds).
- Parameter Window "Preset": Allows for setting and recalling preset values for outputs.
- Parameter Window "Logic": Enables logical operations (AND, OR, XOR, GATE) between two input objects, with the result controlling the output.
- Parameter Window "Scene": Configures scene numbers (1-64) for each output, allowing for scene recall and status feedback.
- Parameter Window "Threshold": Sets threshold values (Threshold 1 and Threshold 2) for switching actions, with options for hysteresis.
- Parameter Window "Safety": Defines safety priorities (Safety Priority 1 and Safety Priority 2) and their corresponding output statuses.
- Parameter Window "Forced": Configures forced operation modes for outputs, allowing for temporary overrides with different priority levels.
- Parameter Window "Heating actuator": Configures the valve type (1 bit or 1 byte) and control mode for heating actuators, including continuous control and PWM cycle time.
- Parameter Window "Monitoring": Configures cyclic monitoring of control values, valve position during fault, and report fault status.
- Parameter Window "Regular": Configures automatic regular switching with adjustable time intervals (one time per day, one time per week, one time per month).
The device supports secure commissioning, requiring the use of security keys and passwords for configuration. The ETS software provides tools for managing device certificates and ensuring secure communication.
Maintenance Features
The K-BUS Switch Actuator with Secure is designed for reliable operation with minimal maintenance. However, certain considerations are important:
- Attentions:
- Keep devices away from strong magnetic fields, high temperatures, and wet environments.
- Do not drop the device or make them get hard impact.
- Do not use wet cloth or volatile reagent to wipe the device; wipe with care.
- Do not disassemble the devices.
- Bus Voltage Recovery: The device has a configurable delay for output recovery after bus voltage returns, preventing immediate switching and potential overloads.
- Error Handling: The device can detect and report fault status, and in heating actuator mode, it can continue to operate during high-priority operations even if a fault is reported.
- Firmware Updates: While not explicitly detailed as a user-accessible feature, the use of ETS software suggests that firmware updates might be possible to enhance functionality or address issues.
- Factory Reset: The device can be reset to factory settings by pressing the programming button and holding it for 4 seconds, then releasing and repeating the operation for 4 times, with the interval between each operation being less than 3 seconds. This allows for easy restoration in case of configuration issues.
- Secure Commissioning: The secure commissioning process helps prevent unauthorized access and tampering, ensuring the integrity of the building control system. If the FDSK (Factory Default Setup Key) is lost, the device can be reset to factory settings, but without the project password, the commissioning key will not be able to be imported.
The device is designed for long-term reliability with high mechanical and electrical endurance ratings for its outputs. Regular checks of the physical environment and adherence to the attention guidelines will help ensure optimal performance and longevity.
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