What’s the HassleSafety systems have been built the same way for years. Different types of I/O card and conditioning device must be cross-wired to conventional marshalling terminals for each signal type. The supplier needs to know the I/O schedule before submitting cabinet designs for customer approval.The I/O cannot be finalised until Hazard Analysis is complete, and the required Safety Instrumented Functions have been designed to meet the target SIL. Time pressures often drive projects to accept there will be I/O changes during the project, leading to re-design and re-work. Software and hardware are eventually tested by the customer at the supplier’s factory. The whole process requires several interactions between customer and supplier, consuming time and resources. Time for a Different ApproachEmerson’s pre-engineered Safety Instrumented System offers an easy-to-deploy option. Configurable enclosure designs combine with Electronic Marshalling technology to deliver standard hardware layouts in a range of sizes, with minimal effort beyond selection of required options.Advanced function blocks for analogue or digital voting, cause effect logic and sequential/state-based logic meet the needs of most safety applications with minimal configuration effort. Enhanced software tools can configure the SIS logic automatically from SIF design specifications, further reducing the engineering effort for the complete SIS solution. Testing can be completed from the comfort of your office, using cloud-based computing techniques. |
Configure to OrderWith a number of cabinet sizes available, based on tried and tested, standard designs, the Configure-To-Order (CTO) concept allows customers to choose from a menu of options to specify traditional cabinets or field enclosures as required.Select the enclosure sizes you need for the total I/O capacity, and worry about signal types later. Whether it’s traditional cabinets for safe area equipment rooms, or field enclosures for hazardous location installation, DeltaV SIS CTO offers standard, pre-engineered solutions for your needs. Cabinets can be built and shipped to site for field wiring termination much earlier in the project lifecycle. Alternatively, final design decisions can be accepted later in the project. |
Electronic MarshallingThe Electronic Marshalling concept eliminates the need for traditional marshalling cabinets. Signals can be terminated directly from the field onto Electronic Marshalling terminals. Signals can be mixed in any order, with the obvious constraint that Intrinsically Safe signals must be separated from non-IS signals.For each signal, the appropriate characterisation module (CHARM) is selected to match the electrical requirements. Different voltages, current sourcing or sinking, inputs or outputs; CHARMs are available for almost all commonly-encountered I/O signal types, and do not need to be specified until much later in the project. The photograph (right) shows some, but not all of the available CHARM types. |
Automatic Software ConfigurationIEC61511 requires that all Safety Instrumented Functions (SIFs) should be properly designed. Modelling tools are often used to confirm whether the total loop architecture and device redundancy meets the required Safety Integrity Level (SIL).exida offers the exSILentia suite of tools to help with these tasks, and has tools to automatically generate the DeltaV SIS software from SIF designs. DeltaV SIS Advanced Function Blocks are connected and parameterised directly based on data which is also required for exida SIL Verification. The same Advanced Function Blocks can also be configured manually, with standard features that take care of typical requirements such as voting, start-up or maintenance overrides, cause-effect and sequential logic. Standard graphical dynamic objects (dynamos) are available to represent these Advanced Function blocks on a DeltaV SIS HMI, if required. Software can be tested remotely, and independently of the physical hardware in a virtualised environment matching the hardware configuration. Hardware can be shipped to site for installation, wiring and connection even before the software is complete. Further Information |
Just Add CHARMsThe CTO cabinets and field enclosures are manufactured and tested according to standard design documents and following standard test procedures. Customers are welcome to witness a hardware factory test if they wish, but this is not normally considered necessary.The CTO enclosures are shipped ready to be installed on site. Just connect power, ground and communications. They are fitted with DeltaV SIS Electronic Marshaling CHARM terminal blocks, ready to accept CHARMs of the required type, once the signal type is known. |
How It WorksConfiguring your system hardware comes down to 3 simple choices; the Style of the Enclosure, the Size of the System, and the System Interfaces required. The Configure-To-Order (CTO) concept also allows for a degree of customisation to suit your needs.Software configuration can be fully automatic or manual using the DeltaV SIS suite of TÜV Certified Function Blocks, including Advanced Function Blocks for Analogue and Digital Voting (1oo2, 2oo3, etc.), Cause & Effect Matrix plus Sequencer blocks for applications such as Burner Management systems. Just add CHARMs! Enclosures can be shipped without knowing the I/O signals. Characterisation Modules (CHARMs) can be added once the type of signal is known and can even be left until after the I/O signal wires have been terminated onto the Electronic Marshalling terminal blocks. |
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Ready for all ApplicationsPre-engineered solutions are beneficial for most safety applications on small-medium sized projects. Our standard (CTO) enclosure designs assist with projects of any size.Emerson’s safety team can help you specify your requirements and when needed we can implement safety projects to meet those requirements, based on pre-engineered standards or custom designs if necessary. We create applications to protect your plant and personnel from hazardous conditions and provide a rapid and coordinated operational response to emergency situations. Standard solutions are available for applications including Emergency Shutdown, Burner Management, Fire & Gas Detection, High-integrity Pressure Protection Systems (HIPPS) and Overfill Protection. Also for applications to replace ageing safety systems that might be causing reliability issues, or concerns about IEC 61511 compliance. |