SLS1508 DeltaV SIS™ Logic Solver

Description

Overview

Essential details：SLS1508 DeltaV SIS™ Logic Solver

Product Description

Flexible deployment. Traditionally, process safety systems have been deployed either separate from the control system or interfaced to control systems via engineered interfaces based on open protocols (e.g. Modbus). However, most end users require a higher integration for configuration, maintenance, and operations environment. DeltaV SIS can be deployed either as interfaced to any DCS or integrated with DeltaV DCS.
Integration is accomplished without scarifying functional separation as safety functions are implemented in separate hardware, software, and networks while being seamlessly integrated at the workstations.
Easy Compliance with IEC 61511. IEC 61511 demands rigorous user management and the DeltaV SIS process safety system provides it. IEC 61511 requires that any changes made from an HMI (e.g. to a trip limit) be extensively vetted to ensure that the right data is written to the right Logic Solver.
The DeltaV SIS process safety system automatically provides this data verification.

SLS1508

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SLS1508 DeltaV SIS™ Logic Solver

Product Description

Scales to fit any size application. Whether you have an isolated wellhead or a large ESD/fire and gas application, the DeltaV SIS process safety system scales to provide you with the safety coverage you need for your SIL 1, 2 and 3 safety functions. Each SLS 1508 Logic Solver has dual CPUs and sixteen channels of I/O built into it. This means that no additional processors will ever be required to expand the system, since each Logic Solver contains its own CPUs.
Scan rate and memory usage are constant and independent of system size. SIL 3-rated. DeltaV SLS 1508 Logic Solvers are installed in redundant pairs for increased process availability of your SIS loops.

The DeltaV SIS process safety system consists of the following hardware:
„ Redundant Logic Solvers (SLS 1508) and termination blocks
„ SISNet Repeaters (see separate product data sheet)
„ Carrier extender cables
„ Local peer bus extender cables
„ Right 1-wide carrier with termination
Logic Solvers (SLS 1508) contain the logic-solving capability and provide an interface to 16 I/O channels that can be configured as Discrete Input, Discrete Output, Analog Input (HART) and HART two-state output channels. Logic Solvers and termination blocks install on the 8-wide carrier.
Logic Solvers communicate with each other through the carriers over a two-channel, local peer bus (SISnet) and remote peer ring. Local Logic Solvers are hosted by the same DeltaV controller and remote Logic Solvers are hosted by a different DeltaV controller. Logic Solvers are powered by a 24 V DC power supply that is separate from the power supply that drives the DeltaV controller and I/O. Logic Solvers install in odd-numbered slots (1,3,5,7) on the 8-wide carrier. Redundant Logic Solvers use four slots.