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.

Fiberoptic Wiring

Safety network ports (SNP) on the CSLS are available for

copper only. DeltaV SIS Smart Switches can be connected

using fiberoptic cables.

Because fiberoptic cables do not conduct electricity,

they should be used in connections between buildings

or in plant areas where electromagnetic interference is present.

Fiberoptic cabling must be used where cable runs are longer

than 100 meters (328 ft.).