All About Mechatronics Engineering

PLC Based Security Access Control Systems and Service

I & C Systems Engineering (ICS) has developed a very unique, cost effective and robust facility wide access controller. We have used this PLC based system for Infant Security and Building Access Control as well as Alarm Management at several healthcare facilities in the Northeast. The system can be used with RF proximity, bar code and magnetic stripe technologies and is easily expandable to include many other data acquisition functions. It has proven to be an excellent replacement for existing legacy access control systems.

Key Benefits

Robust, cost effective, facility wide access controller
Usable with RF proximity, bar code, and magnetic stripe technologies
Working replacement for existing systems

Building Automation/HVAC Control Services

I & C Systems Engineering (ICS) has many years of experience in commercial and industrial-grade instrumentation and controls for facility management systems. We have designed systems to control entire buildings, from the tight tolerances of industrial clean rooms, to support equipment such as chillers, cooling towers, scrubbers, and down to the environmental controls for office spaces. We recognize the fact that some systems are more critical than others, and can devise cost effective, appropriate solutions for every need.

Key Benefits

Proven control schemes for typical HVAC and process equipment
Experience with many different commercial and industrial-grade controllers and HMI software
Interfacing with or expanding an existing system, or design/build turnkey systems

HVAC control system

Direct digital control

Central controllers and most terminal unit controllers are programmable, meaning the direct digital control program code may be customized for the intended use. The program features include time schedules, setpoints, controllers, logic, timers, trend logs, and alarms. The unit controllers typically have analog and digital inputs that allow measurement of the variable (temperature, humidity, or pressure) and analog and digital outputs for control of the transport medium (hot/cold water and/or steam). Digital inputs are typically (dry) contacts from a control device, and analog inputs are typically a voltage or current measurement from a variable (temperature, humidity, velocity, or pressure) sensing device. Digital outputs are typically relay contacts used to start and stop equipment, and analog outputs are typically voltage or current signals to control the movement of the medium (air/water/steam) control devices such as valves, dampers, and motors.

Groups of DDC controllers, networked or not, form a layer of system themselves. This "subsystem" is vital to the performance and basic operation of the overall HVAC system. The DDC system is the "brain" of the HVAC system. It dictates the position of every damper and valve in a system. It determines which fans, pumps and chiller run and at what speed or capacity. With this configurable intelligency in this "brain", we are moving to the concept of building automation.

Building Automation System

More complex HVAC systems can interface to Building Automation System (BAS) to allow the building owners to have more control over the heating or cooling units. The building owner can monitor the system and respond to alarms generated by the system from local or remote locations. The system can be scheduled for occupancy or the configuration can be changed from the BAS. Sometimes the BAS is directly controlling the HVAC components. Depending on the BAS different interfaces can be used.