User's Manual

AXIS Q7900 Installation Guide Page 9
ENGLISH
PS2 LED - This will indicate a RED light when there is an error in Power supply 2. Please shut down
PS2 and replace with a new power supply. It also indicates if PS2 is disconnected
FAN LED - This will indicate if one or more FANS need to be replaced with new ones. Please replace
the fans and reset the fans warning.
FANS button - This will reset the fan warning.
Power supply 1 and 2 - Replaceable and redundant power supply. 100-240VAC input.
Pin assignments
Pin assignments for the RS-485 connector of the AXIS Q7900 Rack
Note: For RS-485 unit connector information for video encoders, refer to their respective Installation Guide for
I/O connector information.
Pin AXIS Q7406 AXIS 243Q AXIS 241Q/S, AXIS 240Q
12 Channel 6, RS485B NC NC
11 Channel 6, RS485A NC NC
10 Channel 5, RS485B NC NC
9 Channel 5, RS485A NC NC
8 Channel 4, RS485B NC NC
7 Channel 4, RS485A NC NC
6 Channel 3, RS485B NC NC
5 Channel 3, RS485A NC NC
4 Channel 2, RS485B NC NC
3 Channel 2, RS485A NC NC
2 Channel 1, RS485B Channel 1, RS485B RS485B
1 Channel 1, RS485A Channel 1, RS485A RS485A