Significantly More Power
The black profile cable provides 16 A or 20 A depending on the cable cross-section. In contrast, round cables with typical M12 or 7/8" plugs are usually only designed for much lower currents (see table on the right).
No Looping Through
In round cable solutions, the respective plug indirectly determines the "limit" for individual modules and for the total current of all modules connected in series. That's because unlike ASi, the power in such configurations often needs to be looped through the modules, resulting in power losses.
The profile cable can provide up to 16 A as standard. To transmit more than 4 A over an M12 connection, you need to use expensive connectors with special power coding. But even when an application only requires a low power supply, ASi solutions based on a profile cable almost always turn out to be more cost-effective.
Power Supply for Non-ASi participants
Special passive distributors allow a wide variety of non-ASi field devices to be connected to the profile cable and thus supplied with power. Bihl+Wiedemann offers a broad range of products in this area and can also develop tailor-made passive distributors on customer request.