YPC115A called Fiber Splitter, In simple terms, it splits an incoming optical signal from a single fiber into multiple identical signals for transmission to several devices; conversely, it can also aggregate multiple optical signals into a single stream to be sent back to the host unit.

Its core function is to split a single fiber-optic input into eight outputs; a single module can simultaneously support eight downstream control units, significantly reducing the number of fiber switches and optical splitters required. It is compatible with both single-mode and multi-mode fiber (wavelengths of 850–1550 nm) and supports transmission rates up to 1 Gbps. It is compatible with industrial buses such as Advant Fieldbus 100, Modbus RTU, and DeviceNet, meeting the low-latency requirements of DCS real-time control. Furthermore, its all-fiber transmission completely isolates high-voltage interference and ground loops, making it ideal for harsh environments—such as power plants or areas near variable frequency drives—where strong electromagnetic interference is present.

Fiber-optic splitters are also found in our daily lives—specifically in broadband internet connections—but the YPC115A is designed for industrial use; there are significant differences between the two.

The similar model YPC111A, on the other hand, distributes terminal signals to the host device.