Selection
How to choose: SY-1231 vs SY-4096 vs SY-8640
Match by application: hospital/cabinet → SY-1231; edge half-width 1U stamp+OCXO+hardware time I/O → SY-4096; plant multi-port / dual supply → SY-8640.
Choose SY-1231 when hospital weak-current, industrial cabinets, or security need cabinet NTP—BeiDou+GPS, TCXO, Modbus / 1PPS / PULSE with a deliverable datasheet; Up to 3840 NTP requests per second; Accuracy ±1–5 ms. No IRIG, no OCXO.
Look to SY-4096 for factory/campus/BA edge cabinets needing half-width 1U hardware-stamped NTP, OCXO, and hardware time I/O. Up to 21,000 NTP requests per second (sustained 20,000–21,000); Accuracy ≤ 100 µs (network NTP, ≠ 1PPS). Planning N=⌊η×R/f_poll⌋.
Look to SY-8640 for power/metals plants needing separated mgmt/timing, multi-gigabit, or dual supply. Planned direction only until the shipping datasheet.
SY-4096 does not replace the SY-8640 multi-port flagship. When unsure, match the scenario then inquire.