The SN-4040 keyboard is a small and easy-to-use direct control keyboard with a clear LCD display. It can be directly controlled by RS485 bus to control multiple domes, suitable for small projects.
The SN-4040 straight control keyboard is a compact RS485‑based controller designed for PTZ camera systems. It supports up to 99 camera addresses, multiple communication protocols (Pelco‑P, Pelco‑D, YC, YINXIN, Shanghai Anfang), and offers functions such as preset point selection, dwell time adjustment, and automatic scanning.
The manual details power requirements, bus wiring, protocol selection, and step‑by‑step instructions for camera selection, preset point programming, and automatic sequence operation. It also includes specifications for voltage, power, bus length, and impedance matching to ensure reliable communication. This manual is written in Chinese.
| Maximum RS485 nodes | 32 |
|---|---|
| Maximum bus length | 1200 m |
| Communication baud rate (general) | 9.6 kbit/s |
| Communication baud rate (Pelco‑D) | 2.4 kbit/s |
The RS485 bus can connect up to 32 decoders or other devices.
The dwell time can be set between 1 and 60 seconds using the DWL key.
Enter the camera number (1‑99) with the numeric keys, then press the CAM key.