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Daisy-Chained Host Adapters
Up to 64 Host Adapters can be connected in a daisy-chain to a create a segment of CPUs that are controlled by a single user from
a User Station. The first Host Adapter is connected to the User Station via the "OUT" port.
segment will have CAT5 cable going from their "OUT" port to another Host Adapter's "IN" port to enable communications between
the user and each CPU in the system, as shown in Fig. 10.
Host Adapter in the segment.
NOTE: The installer must ensure that all CAT5 cable terminations between each Host Adapter are of the straight-through
type (pin 1 to pin 1, pin 2 to pin 2, etc.) and not crossover.
NOTE: The total length of the CAT5 cable from the User Station to the last Host Adapter in the daisy-chain must not
exceed 1000'.
Adding a Host Adapter to a segment
When adding a Host Adapter to a segment, whether at the end, or inside the chain (between two other Host Adapters connected
together), the administrator must follow some simple steps:
1.
Make sure the Host Adapter being connected to a CPU is the proper type for the CPU.
CPU TYPE
HOST ADAPTER MODEL
PS/2
HA-PS2
USB
HA-USB
SUN
HA-SUN
2.
Determine what name the Host Adapter will be identified as in the Host Adapter list (should be unique to all other known hosts
in the segment).
3.
Follow the installation instruction on page 3 for Host Adapters and for above for Daisy-Chained Host Adapters.
FYI: A Host Adapter can be added to the last Host Adapter in the chain, or between two existing Host Adapters.
NOTE: Do NOT attach a Host Adapter to a CPU or disconnect a Host Adapter from a CPU while the CPU is connected to
power. Disconnect the power cord first, then connect or disconnect the Host Adapter. Failure to do so may result in
damage to the Host Adapter or CPU.
4.
Once the installation procedure is complete the connected CPU can be powered up.
5.
This Host Adapter will be auto discovered by the master authority. It will identify itself as "(NEW PS2 HA)" , "(NEW USB
HA)", or "(NEW SUN HA)".
6.
The administrator should assign a unique name to the Host Adapter (see page 23)
7.
All users will have default access to the new Host Adapter unless the Administrator configures the access otherwise (see
page 26).
8.
Once access controls have been set, the administrator should verify the security access to the new Host Adapter.
A Terminating Plug must be installed in the "IN" port of the last
Figure 10- Daisy-chained Host Adapters
9
The additional Host Adapters in the
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