Axis Communications Q7900 Rack Guide D'installation page 9

AXIS Q7900 Installation Guide
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
Pin AXIS Q7406
12 Channel 6, RS485B
11 Channel 6, RS485A
10 Channel 5, RS485B
9 Channel 5, RS485A
8 Channel 4, RS485B
7 Channel 4, RS485A
6 Channel 3, RS485B
5 Channel 3, RS485A
4 Channel 2, RS485B
3 Channel 2, RS485A
2 Channel 1, RS485B
1 Channel 1, RS485A
Note:
For RS-485 unit connector information for video encoders, refer to their respective Installation Guide for
I/O connector information.
Get user manuals: See SafeManuals.com
AXIS 243Q
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Channel 1, RS485B
Channel 1, RS485A
Page 9
AXIS 241Q/S, AXIS 240Q
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RS485B
RS485A