LSN Description and Specification

The SZ controllers and CSLSs can be physically connected

as a star topology (the LSN does not support network

ring topologies).

Starting with DeltaV SIS v13. the LSN Bridge (LSNB) allows

communication across multiple LSNs. The LSNB connect

to the LSN following a star topology.

Refer to the latest DeltaV SIS Installation and Planning Guide

for details of network layouts and network cable shielding

requirements and power and grounding requirements for

the overall DeltaV SIS system.

A redundant CSLS communicates over the LSN with up to

15 other CSLSs, 1 SZ controller, and 1 LSNB allowing great

flexibility and ease of system expansion.

Only DeltaV SIS Smart Switches are supported on the LSN.

The LSN is certified according to the concept of black channel

per IEC61508-2. Therefore, the LSN hardware components

are considered as an interference free hardware component of the SIS.