The CVT4K-S is a high-performance fiber converter developed by NovaStar. It is used for conversion between optical signals and electrical signals, allowing for long-distance signal transmission that is stable and not easily interfered with. Easy to use, the CVT4K-S makes it convenient to connect terminal devices and simplifies on-site wiring connections. CVT4K includes 4 pcs SPF4K-S. To connect it to MCTRL4K you need 4 additional SFP modules (SPF4K or SPF4K-M).