EAW DSA230i Portable Speaker User Manual


 
CobraNet
Audio signal or computer Network cabling does Ensure Ethernet cabling meets
communication not functioning not meet specification IEEE 802.3u specifications for
or not functioning correctly 100BASE-T networking.
Audio signal or computer CM-1 Interface Card Replace with a known good CM-1
communication not functioning malfunctioning Interface Card to determine if the
or not functioning correctly removed card is faulty.
Other CobraNet problems Network or digital audio Refer to either IEEE 100BASE-T or
not properly implemented Peak Audio
documentation to troubleshoot
network or digital audio difficulties.
8.3 EIA-485 Network Notes
EIA-485 network cabling has certain limitations that these notes summarize. Improper set-up of an EIA-485
network can result in faulty or no operation. To use EIA-485 network configurations or cabling schemes not
addressed in this manual, consult a qualified network professional.
8.3.1 CABLING NOTES:
1. Single Module or module cluster:
One end of the EIA-485 cable is connected to the computer’s EIA-485 port and the other to the EIA-
485 connector on the module or on one of the modules in a cluster.
2. Multiple Modules:
One end of the EIA-485 cable is connected to the computer’s EIA-485 port. The cable is then
connected daisy-chain fashion to multiple modules or clusters. This means to connect the EIA-485
cable from the computer to a module or cluster, then to loop it to additional modules or clusters. Use
the supplied RJ-45 Signal Link Cables to link modules within a cluster using the Signal Link jacks.
This cable also interconnects the audio between the modules.
3. DO use an EIA-485 hub when separate EIA-485 home runs to the computer are needed because of cable
routing constraints. Note: EIA-485 hubs often contain an RS-232 to EIA-485 converter.
4. DO use an EIA-485 hub to extend the length of the EIA-485 cabling beyond 1000 ft / 300 m.
Literature about EIA-485 claims maximum cable lengths of 4,000 ft. However, the fastest data rates
for a DSAi network, assuming ideal network conditions, limit the maximum to 2,800 ft / 850 m.
Performance variations for the network cable, connectors, EIA-485 drivers, and several other
variables can and often do further reduce this length. Therefore, this is the maximum recommended
length to ensure reliable communications.
5. DO use an EIA-485 hub to connect the EIA-485 network to more than 31 DSAi Clusters.
Each module within a multi module DSAi Cluster counts as one DSAi Cluster if they are all
connected DIRECTLY to the EIA-485 network using the EIA-485 Phoenix connectors. If the
modules within a multi-module DSAi Cluster are inter-connected via the Signal Link connectors, and
thus only one is connected directly to the EIA-485 network, then this counts as only one DSAi
cluster.
6. DO NOT connect the EIA-485 cabling to the modules in a star fashion.
This means do not home-run an EIA-485 cable from each module or cluster to the computer.
7. DO NOT connect the EIA-485 cabling between modules in a star fashion.
This means do not run an EIA-485 cable from one module or cluster to more than one other module
or cluster.
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