Automated independent backup system

This automated independent backup standalone safety instrumented system backs up current process control trip logic and meets the requirements of IEC 61511. The system includes an IEC 61508 logic solver that is functionally independent from the process control system, supplements existing logic and meets all appropriate safety standards.

02/09/2010


DIAMOND-SIS automated independent backup
DIAMOND-SIS automated independent backup (AIB) is alow-cost, standalone safety instrumented system (SIS) that backs up currentprocess control trip logic and meets the requirements of IEC 61511. The systemincludes an IEC 61508 logic solver that is functionally independent from theprocess control system, supplements existing logic and meets all appropriatesafety standards.


DIAMOND-SIS AIB provides high integrity and process

reliability. It is available in single, dual and triplicated channel

configurations with online diagnostics, testing and maintenance capabilities.

The single and dual channel systems are acceptable for SIL 2, while the

triplicated channel systemis certified by Factory Mutual to SIL 3. This means

that DIAMOND-SIS can meet the fault tolerance and PFavg requirements of any

application.

With its 5 A output rating, the system can de-energize

multiple final elements including motor control circuits and/or solenoid

operated valves. Local or remote manual reset ensures controlled process

restart after shutdown.

DIAMOND-SIS AIB is particularly useful with legacy control

systems that do not meet current SIS standards. Typically, during the early

days of digital control, users implemented safety logic within their process

control systems. Today, they do not want to impose SIS requirements or

management restrictions within the existing systems. Instead, they need an

independent backup safety logic system that connects easily to existing plant

equipment, meets all safety standards and requirements, and requires no

reprogramming of process logic. DIAMOND-SIS AIB fulfills all of those

requirements.

A single channel DIAMOND-SIS AIB system includes a

pre-mounted and wired DIN-rail signal isolator, a Model 340 logic solver, a

fuse block and five terminals ready to accept existing wiring. All components

are rated for -30 C to 75 C and Class I Div II operation, and meet the

mechanical integrity requirements of IEC 61511.

The system can typically be mounted in an existing DCS

marshalling cabinet, and the user wires the logic solver contacts in series

with the DCS contacts. The logic solver then independently backs up the trip

functionality of the DCS.

Each DIAMOND-SIS logic solver module can accept virtually

any analog input. Its two field adjustable trip points allow the process to be

shut down on high and/or low process variables, or to detect an out of range

signal fault. The number of inputs and the voting architecture - such as 1oo1,

1oo2,2oo2 or 2oo3 - can be adjusted to meet performance requirements. The

process shutdown signal from the logic solver can be sent to both the DCS, and

directly to a shutdown device such as a relay or solenoid.

The installation does not require any reprogramming of the

existing DCS. In addition, the installation cost of a DIAMOND-SIS AIB is 80%

less than that of an equivalent Safety PLC with the same number of loops.

Maintenance costs are also greatly reduced as it's not necessary to purchase,

implementand renew programming software. The Safety Requirements Specification,

including Safety Integrity Level (SIL) verification documentation, can be

supplied as an option.

SIS-TECH

www.sis-tech.com

www.sis-tech.com/diamond_sis.html



No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2015 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
World-class manufacturing: A recipe for success: Finding the right mix for a salad dressing line; 2015 Salary Survey: Manufacturing slump dims enthusiasm
2015 Top Plant: Phoenix Contact, Middletown, Pa.; 2015 Best Practices: Automation, Electrical Safety, Electrical Systems, Pneumatics, Material Handling, Mechanical Systems
A cool solution: Collaboration, chemistry leads to foundry coat product development; See the 2015 Product of the Year Finalists
Digital oilfields: Integrated HMI/SCADA systems enable smarter data acquisition; Real-world impact of simulation; Electric actuator technology prospers in production fields
Special report: U.S. natural gas; LNG transport technologies evolve to meet market demand; Understanding new methane regulations; Predictive maintenance for gas pipeline compressors
Cyber security cost-efficient for industrial control systems; Extracting full value from operational data; Managing cyber security risks
Getting ready for industrial IoT; Visualizing the (applied) automation continuum; Preventing VFD faults and failures; Using wireless for closed-loop applications
Migrating industrial networks; Tracking HMI advances; Making the right automation changes
Understanding transfer switch operation; Coordinating protective devices; Analyzing NEC 2014 changes; Cooling data centers

Annual Salary Survey

After almost a decade of uncertainty, the confidence of plant floor managers is soaring. Even with a number of challenges and while implementing new technologies, there is a renewed sense of optimism among plant managers about their business and their future.

The respondents to the 2014 Plant Engineering Salary Survey come from throughout the U.S. and serve a variety of industries, but they are uniform in their optimism about manufacturing. This year’s survey found 79% consider manufacturing a secure career. That’s up from 75% in 2013 and significantly higher than the 63% figure when Plant Engineering first started asking that question a decade ago.

Read more: 2014 Salary Survey: Confidence rises amid the challenges

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
This article collection contains several articles on the vital role that compressed air plays in manufacturing plants.