Connecting MC5 units in cascade

Please consider the following when making cascade connections between MC5 units.

Tips for successful cascading

The maximum number of levels for a cascade is three.

The maximum number of computer systems that can be controlled within a

 

cascade installation depends upon the MC5 unit placed at the top level. If

 

the top level unit is a non-IP version, a maximum of 512 computer systems

 

can be controlled. However, if the top level unit is an MC5-IP, the maximum

 

number of computers drops to 128. This is due to the extra burden placed

 

on the unit’s memory of administering global (IP) users.

The number of links between units (three or four) determines the number of

 

users that can simultaneously access the computers situated further down

 

the tree. Link groups of one and two links should not be used.

Ensure that cascade links (within a group) between units are approximately

 

the same length.

Triple and quad link groups may be mixed on one unit providing the

 

links lie within the appropriate port boundaries designated in the Group

 

numbering diagram.

MC5-IPmodels can only be used at the top level of the cascade tree

To connect units in cascade

1Ensure that power is disconnected from the MC5 and all other units to be connected.

2 Connect one end of each cascade link cable to an appropriate COMPUTER CONNECTIONS port on the rear panel of the upper unit. Refer to the Group numbering diagram for the correct link group boundaries.

 

 

because they have only two CATx USER PORTS sockets and the minimum

 

number of links required for a cascade group is three.

For each cascade link, use a standard category 5, 5e or 6 twisted-pair cable,

 

terminated at each end with an RJ45 connector. There must be no crossover

 

connections within the cable, i.e. do not use patch cables. The cascade

 

link cables can be up to 50m (160 feet) in length. However, remember

 

that the overall length between any remote user (via a User Station) and

 

any computer (via a CAM) must not exceed 300m (980 feet) - that figure

 

includes the cascade link cables. Ensure that each of the links within a

 

cascade group all conform to the same length.

The procedure given opposite may be carried out in any order but for clarity

 

the instruction will begin at the higher level MC5 unit (here called the upper

 

unit), i.e. the one that is being fed into by a unit at the cascade level below

 

(here called the lower unit). The procedure remains the same regardless

 

of exactly which cascade levels are being connected. The basic rule is that

 

each link is made by connecting a COMPUTER CONNECTIONS port of the upper

 

switch to a CATx USER PORTS of the lower switch.

 

 

!

 

 

 

 

 

 

 

 

W

 

 

 

 

 

3 Connect the other end of the cascade

 

 

ARNINGENNECT

 

 

 

PARJ45

 

 

 

 

 

 

 

NEL CO

 

 

 

 

 

link cable to one of the CATx USER

 

TO

 

 

CO

ON

 

 

 

OT EQUIPMCO

 

 

 

 

DOKVM

FO

O

 

 

 

 

 

N

 

R RS

 

 

 

 

 

TELEPHONENNECT NNECTION

 

PORTS sockets on the rear panel of

 

 

 

 

ENT

 

THIS

 

 

 

 

SYSTEMSNETWO

 

 

 

5V

 

 

O NLY.

 

 

 

 

 

 

 

RK

the lower unit. Due to the way in

 

4A

 

 

 

 

 

OR

PWR

 

 

 

 

OPTIONS

IN

 

 

 

 

which ports within a link group are

 

 

 

 

 

 

 

 

 

 

 

 

dynamically allocated, it is not usually important exactly which user port

is connected to each computer port of the upper unit.

4Repeat steps 2 and 3 for each of the links within the group, adhering to the Group numbering diagram for the correct link group boundaries on

the COMPUTER CONNECTIONS ports of the upper switch.

CA

 

 

 

Tx

 

 

4

USER

PORTS

 

 

 

 

 

 

 

 

2

 

 

 

POWER

CONTROL

 

 

 

3

 

 

 

 

 

1

 

 



See also

Testing specific links to cascaded computers

Once the MC5 units and computers have been connected, you can edit their names to make it much easier to locate them. See the To create/edit computer names section in the Configuration chapter for more details.

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Lindy MC5-IP manual Connecting MC5 units in cascade, Tips for successful cascading, To connect units in cascade

MC5-IP specifications

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