Pin 1 and pin 8 are shown in reverse in the IME Enhanced Series Network Mini Dome Installation manual (C2269M). See the image below. The C2269M-A update will have the corrected pin order.
Pelco Cameras, Pelco Video Management
Maxwell enhanced cameras when wiring alarms and/or relays
The drawing shows the pins as reversed
look at the pinout of the circled area and they are reversed, compensate for this reversed picture