The DART Power Hub and Segment Coupler 3 (SK3) is based on the popular FieldConnex High-density Power Hub. It consists of motherboards carrying power modules and gateway modules for connection to PROFIBUS DP. The SK3 is located at the end of the homerun cable in the control room cabinet. It detects the spark and switches it off. The SK3 offers:
- Optional Advanced Diagnostic Module for physical layer monitoring
- Load-sharing redundancy of power modules
- Redundancy selectable for gateways
- Output Power: 22.5 V / 360 mA
- Transparent connection to PROFIBUS DP
The DART Power Hub is first to introduce load-sharing redundancy. It balances the load current between the power modules. The power module operates in the best, most energy-efficient state, reducing cooling requirements for the cabinet and increasing service life.
Its connection to PROFIBUS DP is ‘transparent’. This means that PROFIBUS PA devices appear as PROFIBUS DP slaves. The SK3 itself requires no configuration. This simplifies system configuration. Additionally, the SK3 includes one PA Master per segment offering fast and reliable communications. A compact SK3 version for small installations powers two segments.