Dahua Technology VTH2421F Series - VTH5221 D Series

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1.2.4 VTH5221D Series
Figure 1-11 Rear panel
Table 1-6 Rear panel description
No. Port
1 Reset key
2 Network port
3 RS-485 extended port
4 Alarm port
5 SD card slot
Figure 1-12 RS-485 extended port