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SIL 2 ceritifed S7 controller

Created by: ss1970 at: 5/15/2014 7:20 AM (6 Replies)

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5/15/2014 7:20 AM	Rate (0)
ss1970 Posts: 4 Rating: (0)	Dear All Can any one help me to choose S7 controller for SIL2 ceritified systems. Total I/Os will be 150 I/Os . Application is to monitor H2S gas detectors and provide Digital outputs to sounders/beacons. controller require to provide serial communciation (Modbus Slave ) to Allen bradely control logics controller. Also the controller require to provide redundant ethernet communication ( protocol not provided in specifications. in this casethe possible communication from siemens canbe advised )to a System which will be installed in future. Kindly provide a system architecture for this solution.
ss1970 Posts: 4 Rating: (0)
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5/15/2014 8:16 AM	Rate (1)
Ayman Elotaify Platinum Member Joined: 5/28/2008 Last visit: 9/3/2025 Posts: 4522 Rating: (843)	ss1970 Dear All Can any one help me to choose S7 controller for SIL2 ceritified systems. Total I/Os will be 150 I/Os . Application is to monitor H2S gas detectors and provide Digital outputs to sounders/beacons. controller require to provide serial communciation (Modbus Slave ) to Allen bradely control logics controller. Also the controller require to provide redundant ethernet communication ( protocol not provided in specifications. in this casethe possible communication from siemens canbe advised )to a System which will be installed in future. Kindly provide a system architecture for this solution. Hello, Please readcarefully whatH-Hwrotehere. As working with fail safe systems may be seems to be a little bit difficult than standard systems but in fact, you are one of responsible persons on human lives in case of something wrong happen. For this sake, you should be careful in design, programming, testing, and generally in all project phases. Another important point before answering your question. SIL category should be decided from a certified person who knows the process requirements. To achieve SIL 2 for a system, first you have to ask your customer if all IOs will be fail safe or not. If you have a list of fail safe IOs then use the following manual and look for each type of fail safe modules as per the following sections and look for different applications. It looks like a flow chart that will guide you to select the suitable module, and tell you if you need redundancy or not and connection method as well. SIMATIC Automation System S7-300 ET 200M Distributed I/O Device Fail-safe signal modules Chapter 8 for digital IO modules Chapter 9 for analog input modules In each chapter there is a separite section for each F-IO module with six applications for every module as follows: Application 1: Standard mode Application 2:Standard operation with high availability Application 3:Safety SIL2/ CAT.3 Application 4:Safety SIL2/ CAT.3with high availability Application 5:Safety SIL3/ CAT.4 Application 6:Safety SIL3/ CAT.4 with high availability Hope this helps.
	Last edited by: Ayman Elotaify at: 5/15/2014 8:18 AM Ayman Elotaify
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This contribution was helpful to 3 thankful Users Ton Verra SMHZ S7 AUTOMAN

5/15/2014 9:06 AM	Rate (0)
ss1970 Posts: 4 Rating: (0)	thanks for information on I/O modules. Can u please suggest for CPU model and the required communication modules for the required system architecture.
ss1970 Posts: 4 Rating: (0)
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5/15/2014 9:13 AM	Rate (0)
Ayman Elotaify Platinum Member Joined: 5/28/2008 Last visit: 9/3/2025 Posts: 4522 Rating: (843)	ss1970 thanks for information on I/O modules. Can u please suggest for CPU model and the required communication modules for the required system architecture. You select the suitable CPU that can handle these IOs and SIL requirements. For S7-300 you have range of fail safe CPUs "Distruibuted Safety" For S7-400 you have range of fail safe CPUs "Distruibuted Safety" For S7-400 you have range of high availability CPUs which can work in "Fail Safe" systems.
	Last edited by: Ayman Elotaify at: 5/15/2014 10:07 AM Ayman Elotaify
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5/15/2014 10:00 AM	Rate (1)
S7 AUTOMAN Posts: 515 Rating: (56)	ss1970 Dear All Can any one help me to choose S7 controller for SIL2 ceritified systems. Total I/Os will be 150 I/Os . Application is to monitor H2S gas detectors and provide Digital outputs to sounders/beacons. controller require to provide serial communciation (Modbus Slave ) to Allen bradely control logics controller. Also the controller require to provide redundant ethernet communication ( protocol not provided in specifications. in this casethe possible communication from siemens canbe advised )to a System which will be installed in future. Kindly provide a system architecture for this solution. hello, Which values can you use with F CPUs and products of the ET 200 family for PFD, PFH and the proof test interval? Which fail-safe signal modules of the distributed I/O can be combined with which fail-safe controllers? Which hardware and software components are required to set up and operate an F system with SIMATIC S7-300F? i suggest you to read the following threads as well. safety integrity level SIL 1 , SIL2, SIL3 Compatible Hardware
S7 AUTOMAN Posts: 515 Rating: (56)
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5/31/2014 5:34 PM	Rate (0)
SMHZ Bronze Member Joined: 10/19/2012 Last visit: 4/17/2022 Posts: 315 Rating: (9)	Very nicely put by Mr. Ayman In addition pls. also see below link: https://www.industry.usa.siemens.com/automation/us/en/process-control-system/brochures/Documents/safety-integrated-for-the-process-industry-april-2008.pdf
	Last edited by: SMHZ at: 5/31/2014 5:50 PM
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6/1/2014 9:20 PM
K C Das Posts: 114 Rating: (12)	it may help u /tf/WW/en/Posts/32150#top
K C Das Posts: 114 Rating: (12)
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