HIKVISION DS-2CD4012F-A Quick Operation Manual page 12

Network Box Camera·Quick Operation Guide
Power, Video and GND pins are used when the auto-iris is driven by
video; Damp+, Damp-, Drive+ and Drive- pins are used when the
auto-iris is driven by DC.
Table 1-2
No.
1
2
3
4
11
Pins
DC-driven
Damp-
Damp+
Drive+
Drive-