Configure to Order With 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 Marshalling The 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 Configuration IEC61511 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 exida Software System Configuration >

Just Add CHARMs The 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.

Cabinet or Field Enclosure, Safe Area or Hazardous

The Style of Enclosure will either be a traditional System/Marshalling cabinet, or a Field Enclosure. Field Enclosures can be specified for Safe Area mounting or for ATEX Zone 2. Cabinets are for Safe Area only, and can be specified either as Front-Only access, or Front-and-Rear access with a larger I/O capacity.

Choose an I/O Capacity

Choose an enclosure size based on the I/O capacity you envisage at each location; up to the maximum I/O capacity. To minimise project costs whilst leaving space for future expansion you could select a larger enclosure than initially required, i.e. 288 I/O in a 480 maximum I/O cabinet. If Intrinsically Safe signals are required, then the mix of IS versus non-IS I/O needs to be determined so that signal segregation can be provided in the enclosure.

Choose your Interfaces

We need to know how the SIS will interface with existing systems, and with the user. Is this an extension of an existing DeltaV system, with full integration? Or is this a standalone SIS project to interface with an existing DCS via open protocols such as Modbus TCP, or OPC? Is a local HMI panel required? Are any DeltaV SIS graphics to be prepared?

All of these options are available and very easily configured, as required.

Accept the Standard, or Customise to your Requirements

If you are ready to accept our default/standard options for enclosure configuration, then the three main choices above (Style, Size and Interfaces) are the only decisions you need to make. However, the DeltaV SIS Configure-to-Order concept also allows for some customisation options, similar to choosing options on a new car.

Choices such as the type of steel for the cabinet construction, whether fans or heaters are required and what language should be used on warning labels can all be selected. Refer to our CTO literature for full details of the options available.

Burner Management

DeltaV SIS can be deployed as a Burner Management System (BMS), to ensure the safe operation, control and monitoring of industrial burners for boilers or fired heaters. Through proper sequencing and interlocks, the DeltaV SIS BMS application allows the burner unit(s) to go safely through all relevant states, from start-up to operation and shutdown when needed. If required (usually dependant on the size of the burner unit), DeltaV SIS can also provide in automated leak testing of the gas valves.

Emerson’s BMS solution includes a number of pre-built sequences, and a design methodology that helps customers get to grips with specifying sequence logic in an efficient and intuitive way. Our Consultants can advise on BMS design according to the codes, norms and standards applicable in your region.

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Prevent Incidents from Occurring

The DeltaV SIS Emergency Shutdown (ESD) solution is designed to prevent hazardous situations from occurring, and can initiate the shutdown of a plant, unit, or piece of equipment should it be required. Sensors detect the onset of hazardous conditions, and the DeltaV SIS logic solver is configured to take your plant to a safe state, by manipulating the required final elements (valves and pumps).

The DeltaV SIS provides SIL3 reliability in compliance with IEC61508 and IEC61511 international standards, and in addition has many innovations: repeat confirmation built in to the operator graphics, version control that can be defined by SIL level, powerful voting functionality, and a very flexible Cause and Effect Matrix (CEM) block that is intuitive and easy to use.

Mitigate the consequences of events when they occur

IEC 61511 recognises Fire and Gas Systems (FGS) as mitigation systems, reducing the consequences of an incident AFTER it has occurred, by raising the alarm and taking automatic actions such as deluge systems and closing ventilation. This is done to gain time for people to evacuate the area, contain the incident from escalating and allow for emergency response teams to assess and deal with the incident.

By monitoring process areas where fire, or potentially flammable gas or toxic gas build-up may occur, the DeltaV SIS system can detect hazardous events, alert personnel and initiate timely actions in order to minimise the consequences of the incident.

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Prevent Equipment Damage due to Overpressure

High Integrity Pressure Protection Systems (HIPPS) are a special type of safety function typically used where process design pressure ratings change, such as where a high-pressure rated pipeline enters a lower rated processing unit or measuring station. In normal operation, dangerously high pressures should not occur. But if they do, the HIPPS must react quickly to shut off the upstream source of high pressure and prevent it from reaching the low pressure side of the process plant.

DeltaV SIS can be used as the Logic Solver in a complete HIPPS solution for SIL 3 application. The pre-engineered solutions with standard field enclosure designs suit this application well. Emerson’s safety team has standard HIPPS application solutions ready to deliver.

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Prevent Tank Overfill

Tank overfill is a common potential hazard which can lead to the release of hazardous, toxic and/or highly flammable fluids to the surrounding environment. With such large volumes of fuel or chemicals being stored in tank farms, the consequences can be catastrophic.

It is essential that a tank overfill protection system is deployed to enhance existing safety measures, guarding against the potential hazards that would result from a storage tank being overfilled. A central part of this solution is DeltaV SIS which monitors level devices to automatically shut off the feed to the tanks if the level reaches the high cut off limit. The SIS Logical Solver communicates with the intelligent tank level sensors via HART protocol to diagnose faults before they case spurious trips.

Tank Overfill Protection systems often require relatively small I/O quantities distributed over a large geographical area. Our pre-engineered DeltaV SIS Field Enclosures are ideal for this application.

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