Rockwell Automation Publication 1444-UM001D-EN-P - June 2018 39
Install the Dynamix 1444 Series Monitoring System Chapter 2
Using Local Bus Extension Cables
The Dynamix 1444 series implements a Local Bus that connects modules to:
• Provide power and communication between an expansion module and
its host module.
• Pass the Speed Signals (TTL) from a Tachometer Signal Conditioner
module to other main modules on a network.
If no expansion modules are used in a system, then the modules do not need to
be connected.
In cases where it is necessary to separate modules, two extension cables are
provided:
1444-LBXC-OM3-01 Local Bus Extender Cable (0.3 m/.98 ft)
1444-LBXC-1MO-O1 Local Bus Extender Cable (1.0 m/3.28 ft)
IMPORTANT The extension cables are intended for IN CABINET use only. The ribbon cables
are only minimally shielded. Consequently, care must be taken to verify that
cables are not routed across or near to high voltage or other cables that can
induce noise into the network.
When connecting the modules, be sure that the right sides of two main
modules are never connected. While the connectors are keyed to help
prevent this connection, it is possible to defeat the keying by twisting the
cable or by removing the keys.
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