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9.6.6
Controlling 256 cameras x 64 monitors (banked switching; not full cross point)
42
Siemens Building Technologies
Fire Safety & Security Products
Even an expanded VIS3I-328 node is limited to 16 monitors. By using an extra
VIS3I-328 switched to bridge mode A it is possible to control a multi-node matrix
with up to 256 cameras and 64 monitors. The 'monitor nodes' can be single (32x8)
units or expanded (64x16) units but not a combination of both. A special network
address mode is used to select bridge mode A while no network address is
required for the 'monitor nodes'. See Tab. 31.
Bridge Unit
'Monitor Node'
Network Address
Cams
A0
32
A1
64
Bridge mode A network address settings
Tab. 31
Control of the remote nodes is via PCCON networking. Bridge node serial ports 1
to 4 each connect to a Remote Control Input (PCCON) port, the default being port
2, on a monitor node. Refer to Tab. 1 for the serial port pin-outs.
The VISIWIRE LED on the front panel will blink once a second to indicate it is in
bridge mode and is seeing a monitor node. If the LED is off check the connections
to the 'monitor nodes' and the Comm. Channel settings in the configuration(s).
The camera and monitor numbers allocated to a 'monitor node'are determined by
which bridge node serial port they are connected to. The 'monitor nodes' always
have 16 monitors allocated to them to allow for the fitting of quad output cards. See
Tab. 32 for details of the addressing and Fig. 14 for the layout of bridge mode A.
The VIS3I-328 bridge unit is not used for video switching, only for controlling the
'monitor nodes'. All video and VCR/MPX connections are made at the 'monitor
nodes'. Only cameras on the same node as their monitors can be switched to
those monitors. The cameras in bank A can only be switched to the monitors in
bank F; bank B only switched to bank G for example.
Monitor nodes are capable of controlling cameras both over the coax and via
RS422/RS485.
NOTE
Alarm handling and multi-hop networking are not supported in bridge mode A
Bridge Node
'Monitor Node' Cameras
Serial Port
A0 Bridge
1
1 to 32
2
17 to 64
3
65 to 96
4
97 to 128
Bridge mode A addressing
Tab. 32
'Monitor Node'
×
Network Address
Mons
×
00
16
×
00
16
A1 Bridge
1 to 64
65 to 128
129 to 192
193 to 256
VIS3I-
Total
×
328
Cams
Mons
Needed
×
5
128
64
×
9
256
64
'Monitor Node' Monitors
1 to 16
17 to 32
33 to 48
49 to 64
10.2008
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