The YF-308A Outdoor Preset Position Decoder User Manual provides specs, configuration steps, address tables and special preset functions.
The YF-308A is an outdoor preset position decoder for PTZ camera systems, supporting CNB and PELCO‑P/D protocols and up to 51 preset positions. It communicates via RS‑485 over twisted‑pair cable up to 1200 m and operates from AC 220 V.
The manual details technical parameters, how to set baud rate and address using the 8‑bit DIP switch, provides a full address table, and lists special preset functions such as timed patrol stops and auxiliary contact control. This manual is written in Chinese.
| Communication method | RS‑485 serial, twisted‑pair up to 1200 m |
|---|---|
| Input voltage | AC 220 V ±20 % |
| Power consumption | < 3 W |
| Drive lens voltage | DC 12 V / 800 mA |
| Drive lens control voltage | DC 11.5 V / 300 mA |
| Output control voltage | AC 24 V |
| Number of preset positions | 51 |
| Preset accuracy | < 1.5° (auto‑calibration error) |
| Operating temperature | -30 °C to 60 °C |
| Supported baud rates | 2400, 4800, 9600 bit/s |
Use the 8‑bit DIP switch K; bits 7‑8 select the baud rate according to the baud‑rate setting table.
The communication address can be set from #0 to #63 using the DIP switch.
It supports 51 preset positions, with additional special function numbers beyond that range.