Crest Audio NEXSYS - VERSION 3.0, Software Manual

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Crest Audio Inc. NexSys v. 3.0
Software Manual Page 3.3
A network may be made up of one or more busses. The bus connected to the Bus Server is
defined as the primary bus. All other busses in the network are referred to as secondary
busses and must be attached to the primary bus through a hub or data concentrator.
All nodes on the primary bus will have single-tiered addresses as follows:
Device Address
CKS 200 1
CKS 400 2
CKS 800 3
Hub (1st) 10
Hub (2nd) 20
Hubs
A network cannot support more than 32 nodes. Hubs must be used for networks larger than
32 nodes or where odd physical network runs are required. A hub has two bus connections,
one for the primary side and one for the secondary side. The bus on the secondary side of
the Hub (its secondary network) is electrically isolated from the primary bus but is still a
part of NexSys’ overall network.
Hubs expand the maximum number of nodes in a system from 32 to 1024. The number of
unique addresses is also expanded.
Nodes on a hub’s secondary side will have a “two part” address. The first address is the
hub’s primary address (i.e. the address of the hub on the primary bus.) The second address
is the address of the node on the secondary bus. In the figure, the first hub (at primary
address 10) has two CKV amplifiers attached to its secondary bus. Their addresses are:
Device Address
CKV 200 10,4
CKV 400 10,5
Similarly, the second hub (at primary address 20) has two CKS amplifiers attached to it:
Device Address
CKS 1600 20,1
CKS 1200 20,2
Notice that amplifiers “CKS 1600” and “CKS 1200” on the second hub’s bus have the same
addresses (1 and 2) as the CKS 200 and CKS 400 on the primary bus. This is acceptable
because the inclusion of a unique primary address differentiates them in the network .
Supervisors (Pro class only)
A Pro class network must have at least one Supervisor. Although the two classes of ampli-
fiers may be combined on a single network, it is helpful to separate them for illustration pur-
poses. Each amplifier has a two part address. The first being the node address of its
Supervisor main frame and the second being the amplifier number or Supervisor port num-
ber. There are two Supervisor ports per Supervisor daughter card. There is a one to one con-
nection between each Supervisor port and amplifier.