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Electrical Engineering & Design, Instrumentation & Controls

PLC Programming

Our expertise includes programming of various manufacturers and models of PLCs. We have a sound understanding of how PLCs function and how to maximize their performance as well as the best methods of accessing data to/from operator interfaces and HMIs. We particularly are experienced with the following PLC families:

  • Control Microsystems
  • AutomationDirect
  • Siemens
  • GE
  • Allen-Bradley
  • Modicon


We can recommend the selection of key instruments and manufacturers for a control system. We have installed, calibrated, and troubleshot many instruments with variety of systems. Below is a partial list of instruments with which we have experience:

  • Flow Meters
  • Level Sensors
  • Pressure Sensors
  • Temperature Sensors
  • Chlorination & De-chlorination
  • Water Quality Analyzers

Alarm Dialers

Dialers have become an important part of SCADA systems with homeland security policies. We include security features and alarming on failure of the SCADA system. These features coupled with traditional alarming make the control system function independently of external alarm systems.

  • SCADAlarm
  • Win911
  • Sensaphone
  • Raco

HMI Programming

With a Variety of HMIs on the market, our expertise is with multiple HMI software packages. Each of these packages has distinct strengths and weaknesses applicable to larger control systems. We stress the importance of making the HMI simple for operators to use and visually obvious so learning new functionalities is quick for every operator, regardless of computer abilities. We are fully capable of implementing the following HMIs:

  • Intellution iFix
  • Intellution iHistorian
  • ClearSCADA
  • Wonderware
  • Allen-Bradley FactoryTalk View
  • Ignition

Electrical Panels Design

We have the capability of designing SCADA control panels as well as motor control panels with integrated PLCs. We use local panel shops and competitively bid out the panels to provide the client with the best possible price.

Alternative Energy Design

SKM has designed and implemented solar power systems in some projects. We are part of the team for the Blue Mountain Energy Recovery Project, a waste-to-energy project using pig manure to generate more than 3 megawatts of power daily.

Operator Interfaces

Operator interfaces play a key role in the local operation of water and wastewater systems. Operator interfaces enable operators to see data that is displayed on the SCADA at the local pump house. We have used and installed a variety of operator interfaces, including color and monochrome touch screens, text panels, and set point panels. We have installed from the following manufacturers:

  • Allen-Bradley
  • Modicon
  • Siemens
  • AutomationDirect
  • Red Lion
  • GE

Network Design and Implementation

Complex SCADA systems require the design of complex networks for communications. These networks are the backbone for the SCADA system and reliability is always the key concern. We have designed many of these networks using the following:

  • Fiber Optics
  • Ethernet
  • RS-232 & 485
  • Manufacturer Protocols (like Modbus Plus)

Radio Communications

Wireless capabilities have improved dramatically and are easily implemented into SCADA systems. We have used licensed and unlicensed radios to acquire data from remote locations, depending on distances and line-of-sight restraints. We understand the benefits and limitations of wireless communications and are capable of making reasonable recommendations. We have installed radios from the following manufacturers:

  • Microwave Data Systems (MDS)
  • Trio
  • Phoenix Contact
  • Proxim

3D HMI Graphics

We offer the option of using unique three-dimensional graphics for your HMI. This makes the operator experience much more dynamic and user-friendly than typical two-dimensional graphics. By converting your facility to 3D, you can visualize each room in each building as it exists. The 3D look is clean, accurate, cost effective and produced as quickly as 2D interfaces.

Power Design & Distribution

For most of our projects, we also prepare electrical and control designs. SKM is capable of full power distribution and motor control design, including VFDs, RVSS, motor starters, transformers, standby generators and more.


We have a staff of CAD designers who have aided in the design of many control systems. They have experience with process and instrumentation diagrams, control diagrams, onelines, control panel design, and all associated power and control diagrams.