Emerson KJ4002X1-BE1 - Top Extender Cable Assembly

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.

GSN Description and Specification

Multiple LSNs can be connected using LSNBs. The LSNBs are

physically connected as a star topology (GSN does not support

network ring topologies). Starting with to v14.LTS and later,

the GSN can be logically separated in domains. A GSN domain is a logical group of LSNs.

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.

LSNB communicates over the GSN with other LSNBs,

allowing great flexibility and ease of system expansion.

Up to 16 LSNBs can publish safety data into one GSN domain

but the maximum number of LSNBs publishing information

depends on amount of data published by each LSNB.

There is no limit for the number of LSNBs subscribing to

information from the GSN. Prior to v14.LTS, only one domain

was supported within the GSN, starting v14.LTS and later,

up to 16 domains are supported within the GSN. Refer to

Books Online for more information about system capacities.

Only DeltaV SIS Smart Switches are supported on the GSN.

The GSN requires DeltaV SIS NextGen Smart Switches or the

legacy DeltaV SIS Smart Switches with software release 4.2.14 or greater.