Axis Communications AXIS Q7900 Rack - Manual (Page 6)

Page 6 AXIS Q7900 Installation Guide
Connect power
The AXIS Q7900 has two On/Off switches. Please ensure that the correct AC power cord for your
country is used.
Note also the following requirements and restrictions:
• To prevent the risk of electrical shock when in contact with the unit casing, only earthed/
grounded power cords should be used to power the AXIS Q7900.
• Protection against overcurrents, short circuits and earth faults should be provided in the build-
ing installation.
• The AXIS Q7900 is intended for indoor use only, and only for TN and IT power systems.
• If a foreign object is accidently dropped into the Video encoder Rack, always disconnect power
before attempting to remove the object.
• To turn off power to the AXIS Q7900, both power supplies must be turned off.
AXIS video encoder blades
S/N - (serial number) is identical to the unit’s MAC/Ethernet address,
e.g. 00408C1A2B3C = 00-40-8C-1A-2B-3C.
P/N - is the product’s model number.
Bus Connector - This is the physical interface to the I/O terminal connector on the rack.
DIP Switches - Each video input has a corresponding line termination DIP switch. Axis video
encoder blades are supplied with the line termination enabled for each input; i.e. with the DIP
switches set to ON (down position).
To connect the video encoder in parallel with other equipment, disable the input termination by
setting the corresponding DIP switch to OFF (up position). Failure to do so may affect the image
quality negatively.
For detailed hardware information about a particular Axis video encoder blade, please refer to its
installation guide.
Mounting AXIS video encoder blades
The AXIS Q7900 can accommodate 14 Axis video encoder blades. The slots for these are numbered
1-14 from left to right. See Hardware overview, on page 4.
There are four slot groups in the AXIS Q7900: 1-4, 5-7, 8-10 and 11-14. If a slot group is to be
used, the first slot in the slot group must be occupied. So if the first slot group is to be used, there
must be a blade in slot 1. If slots 5 through 7 are to be used, there must be blade in slot 5 etc..
For example, if you have three blades and want to put them into the first group of slots 1-4, one of
the three blades must occupy slot 1. The other two blades could occupy either slot 2, 3 or 4. Or if
three slot groups were to be used, the first blade could occupy slot 1 or 5, the second blade could
occupy slot 5 or 8, and the third blade could occupy slot 8 or 11.