Emerson SE3007 - DCS Distributed I/O Unit Module

Fully redundant communications. The safety networks are

fully redundant communication networks. The carriers for all

nodes have redundant safety network ports for communication

with primary and secondary network connections.

Port mirroring functionality. Port Mirroring can be

configured on the NextGen Safety Network Switches

either with an “administrator” role or a “engineer” role.

These switches have the capability to mirror the traffic of

several source ports, in a read only manner, to a destination port (probe port).

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.

For Use in Safety Integrity Level (SIL) 3 Applications

The LSN is certified for use in SIL 3 applications.

Wiring

The LSN requires the use of Category 5e screened (ScTP)

cable for the 100/1000 BaseT/TX safety network.

The maximum twisted-pair cable length for the LSN for any

device is 100 meters (328 feet).

The CSLS, LSNB, and SZ controller carriers contain Ethernet

ports to provide the redundant communication for the LSN.