M - Series Logic Solver

A modular and distributed approach, in additon to the SMART Field Integration are the base for the Modern Process Safety System.

M - Series Logic Solver

M - Series Logic Solver

M - Series Logic Solver

M - Series Logic Solver

M - Series Logic Solver
M - Series Logic Solver
    • M - Series Logic Solver

    • With smart logic solvers (SLS), the DeltaV SIS™ architecture provides flexibility for the safety you want, when you want, where you want. The SLS hardware is modular – scaling in sizes of 16 to 30,000 configurable I/O. Memory and CPU are added with every logic solver you add, so the days of running out of memory or CPU power are over. Because of the modular approach to logic solving, adding I/O to an application can be done without affecting the response time of existing applications. DeltaV SIS is designed to be implemented in a distributed architecture, close to the equipment it is safeguarding – resulting in reduced wiring costs and system complexity. It's approved for use in SIL 1, 2 and 3 safety applications as defined by IEC 61508.

About Us M - Series Logic Solver

  • Overview
  • Specification
  • Documents



The DeltaV SIS system, part of Emerson’s smart SIS, ushers in the next generation of Safety Instrumented Systems (SIS). This smart SIS approach uses the power of predictive field intelligence to increase the availability of the entire safety instrumented function.



  • World’s first smart SIS Logic Solver



  • Integrated, yet separate from the control system



  • Easy compliance with IEC 61511



  • Scales to fit any size application
  • SIL 3-rated
  • Online addition of Logic Solvers



Storage temperature


-40 to 85 C (-40° to 185 °F)

Operating temperature


-40 to 70 C (-40° to 158° F)

Relative humidity


5 to 95%, non-condensing

Protection rating


IP 20, NEMA 12



10 g ½-sine wave for 11 ms



1 mm peak-to-peak from 5 to 16 Hz; 0.5 g from 16 to 150 Hz

Input Power


24 V DC ± 20%, 1.0 A plus field power (5.0 A total)

Field Power


4 A maximum (actual value depends upon channel type and field device type)



Each channel is optically isolated from the system and factory-tested to 1500 V DC. No channel-to channel isolation.



In SIS (yellow) terminal blocks in odd-numbered slots (1, 3, 5, 7) on the 8-wide carrier. Redundant SLSs take 4 slots



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