CircuitWerkes Sicon-8 Spezifikationen PDF herunterladen (Seite 89)

Sicon-8 Technical Manual CircuitWerkes, Inc.

Adding SX-8 expansion chassis:

The Sicon-8 can be expanded up to 32 channels by adding SX-8 expansion chassis. Each SX-8

adds eight channels of metering, status and control to the Sicon-8. Up to three SX-8 chassis can

be added to a Sicon-8 (though some early models of the Sicon-8 can accommodate only 1 SX-8).

Each SX-8 has two RJ-45 jacks for interfacing to the Sicon-8 & other SX-8s. The RJ-45 on the left is

considered the input while the jack on the right is the output that feeds other SX-8s. A three

position jumper sets the channel addresses for 9-16, 17-24 or 25-32. When connecting SX-8s to

the Sicon-8 and to each other, you must NOT use twisted pair wires such as CAT-5. Even very

short lengths (1 foot or less) of CAT-5 have been shown to exhibit significant cross-talk resulting in

erratic operation of the Sicon-8 and SX-8 expanders. Flat wire is the preferred medium for

connections. Wiring lengths should be kept as short as possible, preferably less than 1 foot. The

Sicon-8 and SX-8’s chassis ground terminals must also be tied together to insure a good electrical

ground between the two units. Do not rely solely on a metal equipment rack to make the ground

connection between the chassis because these are often inadequate, especially during lightning

events. In some cases, meter readings may also be susceptible to rf interference if the two chassis

are improperly bonded together. Don’t rely solely on the RJ-45 to provide the ground between

chassis or you may get unpredictable results.

SX-8 Rear Connector detail

If your Sicon-8 is version 5.3 or newer, the SX-8 chassis is pre-configured with both JP501 jumpers

to the right for use out of the box. If your Sicon-8 is version 5.00 to 5.3, you will need to change the

Sicon-8 version selector jumpers so that they are both to the left. Sicon-8s prior to version 5.3

cannot be expanded past 16 channels.

Expansion chassis should only be added when the Sicon-8 is powered off. The Sicon-8 examines

its buss at power-up to determine which channels have been added. If you try to add an SX-8 to a

powered Sicon-8 it will not find the added chassis until the next time it powers up.

If an SX-8 chassis that is part of an extended group fails, there is a chance that the remaining SX-8s

will continue to function normally. Also, if the failed chassis is removed from the group and the

remaining channel select jumpers remain set as they were, all remaining channels will stay in place,

but the Sicon-8 will say “Invalid” if you try to access channels that are missing.

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CircuitWerkes Sicon-8 Spezifikationen Seite 89