Description

Technical Specifications

Parameter Name Parameter Value

Product Model FOXBORO E27AM-SA+EA5(usually refers to SPEC 200/SS series)

Manufacturer Foxboro(Foxboro,now a brand of Schneider Electric)

Product Type Analog Control Station/Single Loop Controller

Compatible System Foxboro SPEC 200/SS(Split-Architecture System)

Main Functions Process variable measurement,set point comparison,control algorithm execution(such as PID),manual/automatic control,alarm function

Control Type Analog control,configurable as PID,proportional,integral,differential and other modes

Input Signal Standard industrial analog signal,such as 4-20mA,1-5V DC(depending on the configuration)

Output Signal Standard industrial analog output,such as 4-20mA(for driving valves,actuators,etc.)

Supply Voltage 120 V AC(alternating current),47-63 Hz

Power Consumption 18 W(watt)

Current 3/8 A(ampere)

Operation interface Usually has front panel operation buttons,indicator lights and display screens for easy operator interaction

Mounting mode Panel mounting or rack mounting(depending on the specific housing and system design)

Operating temperature 0°C to+50°C(typical industrial range)

Storage temperature-40°C to+85°C(typical industrial range)

Dimensions Compact modular design,suitable for industrial control cabinets

Status Classic discontinued model,most of the market circulation is spare parts or refurbished parts

“+EA5″option Indicates specific functional expansion or configuration,such as additional I/O capabilities or specific control strategies

Export to Sheets

Product Overview

FOXBORO E27AM-SA+EA5 is a milestone modular controller in the field of process control by Foxboro.It is a member of the Foxboro SPEC 200/SS(Split-Architecture System)family.As the name implies,”Split-Architecture”means that the control functions of the system(such as E27AM-SA+EA5)and the operator interface can be separated and installed in the most suitable location,providing greater flexibility and reliability.

The core of the E27AM-SA+EA5 is an independent analog loop controller.In that era,DCS systems had not yet been fully popularized as fully digital and software-defined,and this independent hardware controller was the key to achieving process automation.It can receive standard analog signals from field sensors(such as temperature transmitters,pressure transmitters,flow meters,etc.),execute preset control algorithms(the most common is PID control),and output corresponding analog signals to adjust the final control elements(such as control valves,frequency converters,etc.).Operators can directly perform manual/auto mode switching(Manual/Auto Transfer),set point adjustment(Set Point Adjustment),process variable display(Process Variable Display)and alarm acknowledgment(Alarm Acknowledgment)through the buttons,knobs and display on the front panel of the module.

The design concept of this module focuses on high reliability and robustness.As a 120V AC powered industrial controller,it is capable of stable operation in harsh industrial environments,including wide temperature ranges and certain electromagnetic interference.The”+EA5″suffix of the E27AM-SA+EA5 model usually indicates that it includes specific functional expansion or configuration,such as more analog input/output channels or support for more complex control strategies.

Although the SPEC 200/SS system and its controllers,such as the E27AM-SA+EA5,have been replaced by more advanced DCS systems(such as Foxboro I/A Series or Foxboro Evo™),these systems are still faithfully serving in many old plants and installations around the world.Therefore,as a core spare part,the E27AM-SA+EA5 has irreplaceable value for the continuous operation and maintenance of these critical production lines.It proves Foxboro’s excellent engineering and classic design in the field of analog control.

Main Features and Advantages

As a classic controller in the SPEC 200/SS system,FOXBORO E27AM-SA+EA5 has left a strong mark in the field of industrial automation with its many”practical”functions and significant advantages:

First,the independent single-loop control capability is its most core feature.E27AM-SA+EA5 can independently perform closed-loop control on a process variable(such as temperature,pressure,flow)without relying on the central processor(No Reliance on Central Processor).This”distributed”control concept is very advantageous in early DCS,and it improves the system’s fault tolerance(Improves System Fault Tolerance).Even if other loops or central systems fail,the module can maintain control over its own loop(Maintains Control over its Own Loop),thereby ensuring the continuity and safety of the production process(Ensures Continuity and Safety of Production Process).

Second,the intuitive operator interface(Intuitive Operator Interface).E27AM-SA+EA5 is usually equipped with a front panel display and physical operation buttons/knobs.This allows operators to directly view parameters,adjust set points,and switch manual/auto modes on site,greatly simplifying on-site operations and increasing response speed.This human-machine interaction method is still efficient even today.

Next,high reliability and stability.As an industrial-grade product of Foxboro,E27AM-SA+EA5 adopts a rugged design and high-quality electronic components.It can operate stably for a long time in a wide industrial temperature range(such as 0°C to+50°C)and in an environment with electromagnetic interference.This excellent anti-interference capability and hardware robustness ensures that it performs extremely high reliability in critical process control,reducing maintenance needs and unexpected downtime.

In addition,flexible control algorithm configuration.Although it is an analog controller,E27AM-SA+EA5 can usually be configured with a variety of standard control algorithms,including PID(proportional-integral-differential)control,proportional control,integral control,etc.to adapt to different process characteristics.This flexibility enables engineers to optimize according to specific process requirements,thereby achieving more precise process control.

Finally,mature and stable technology.The SPEC 200/SS system and its modules have been in service for many years and have been tested by time.Its technology and performance are very mature and stable.For plants that still run these old systems,E27AM-SA+EA5 as a spare part can ensure seamless replacement and continuous operation,avoiding costly system upgrade expenses.

Application Field

FOXBORO E27AM-SA+EA5,a classic analog control station,although the technology is”old”,still plays a”residual heat”in many industrial sites.Its application areas are mainly concentrated in traditional industrial sectors that have high requirements for process control accuracy and system stability:

First,in the oil,gas and petrochemical industries,E27AM-SA+EA5 is widely used in key loops of continuous production units such as refineries,natural gas processing stations,and chemical plants.For example,it can accurately control the temperature and pressure of the distillation tower,the liquid level and flow of the reactor,and the fuel/air ratio of the burner.These independent controllers ensure the stable operation of complex process flows and improve product yield and safety(Stable Operation,Improved Product Yield,and Enhanced Safety).

Secondly,in the power industry,including thermal power plants and some old nuclear power plants,FOXBORO E27AM-SA+EA5 is used for boiler feed water control,steam pressure control,fuel flow control of gas turbines,etc.These circuits have extremely high requirements for response speed and control accuracy.E27AM-SA+EA5 can provide reliable local control(Reliable Local Control)to ensure the continuity and stability of power generation(Ensures Continuity and Stability of Power Generation).

Next,in the metallurgical industry,such as sintering,steelmaking and rolling production lines in steel plants,E27AM-SA+EA5 may be used to control the temperature curve of the heating furnace,the flow of cooling water,and the operating parameters of some auxiliary equipment.In the harsh environment of high temperature and dust,its rugged design can ensure long-term reliable operation(Long-Term Reliable Operation)and ensure product quality and production efficiency(Ensures Product Quality and Production Efficiency).

In addition,FOXBORO E27AM-SA+EA5 can still be seen in the water/wastewater treatment,papermaking,cement,pharmaceutical and other industries for the control of key variables in various pump stations,valves,mixers,dryers and reactors.It helps these plants achieve precise flow,pressure,and level control(Precise Flow,Pressure,and Level Control),thereby optimizing production processes and reducing operating costs(Optimizes Production Processes and Reduces Operating Costs).

In short,FOXBORO E27AM-SA+EA5 is a key spare part for maintaining and supporting those Foxboro SPEC 200/SS systems that have been in service for many years but are still vital.It ensures that these systems can continue to provide stable and precise automated control(Stable,Precise Automated Control)in various harsh industrial environments.

Related Products

If you are interested in SPEC 200/SS system modules such as FOXBORO E27AM-SA+EA5,or if your Foxboro DCS system needs other components,you can also pay attention to some common related products below:

FOXBORO SPEC 200/SS related analog/digital I/O modules:SPEC 200/SS system is a modular system.In addition to the controller,there are various input and output modules for connecting field sensors and actuators.

FOXBORO SPEC 200/SS power supply module:Provides stable power supply for each control station and I/O module in the system.

FOXBORO SPEC 200/SS display unit or recorder:Used to display process variables,alarm information or record historical data.

FOXBORO 43AP/43BP series controller:This is an earlier pneumatic controller of Foxboro.Although the principle is different,there may be functional substitution in some applications.

FOXBORO I/A Series:This is Foxboro’s more modern DCS system.Although it is significantly different from SPEC 200/SS in architecture,they are products of different stages in the development of DCS technology.For example,FBM series modules(FBM201,FBM204,etc.)and FCP

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