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Cabling the Expansion Bus

It is important that the Expansion Bus connectors are never inserted or removed with the power on. Failure to heed this warning may cause damage to the base unit or one or more of the expansion modules.

This section is only relevant if you are using expansion modules in your SiteMonitor System.

MAKE SURE ALL POWER HAS BEEN REMOVED BEFORE CONNECTING OR DISCONNECTING THE EXPANSION BUS.

For the first expansion unit, connect the supplied 6p6c cable from the expansion port on the base unit to the expansion port on the expansion unit. For additional expansion units, repeat the process - connecting each expansion unit to the previous expansion unit.

There is no difference between the expansion ports on the expansion units. As a result, you can connect either port in whichever manner is easiest - we find that connecting directly adjacent ports is easiest and looks neatest. All that matters is that there is a continuous chain from the first to the last unit.

If you need to use a longer cable than the provided expansion cable, you can use any 6p6c phone cable - either straight or reversed. In order to prevent damage to the units, it is important to ensure that all 6 pins are connected, either straight through (pin 1 to pin 1, pin 2 to pin 2, and so on), or reversed (pin 1 to pin 6, pin 2 to pin 5, and so on). The expansion bus is designed to only traverse a few dozen feet, so please keep all cables as short as possible.

It is important that the Expansion Bus connectors are never inserted or removed with the power on. Failure to heed this warning may cause damage to the base unit or one or more of the expansion modules.


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