Dahua DH-IPC-HFW5231E-Z12E Quick Start Manual page 9

Please refer to the following figure for alarm output information. See Figure 1-5 and Figure 1-6.
Mode A:
Level application. Alarm output high and low level, alarm output is OC; it needs to increase pull-
up resistance externally to work normally. Max external pull-up level is 12V, max port current is
300mA (peak). After external pull-up resistance is increased, the default output signal is high
level (external pull-up voltage), and it switches to low level when there is alarm output.
Mode B:
Switch application. Alarm output is used to drive external circuit, max voltage is 12V and max
current is 300mA (peak), it is recommended to use an audible and visual alarm whose model is
H103C.
Figure 1-4
Figure 1-5
Figure 1-6
4