The Control Unit

Our control unit provides advanced measurement and control. They perform the functions of PLCS and more.

The reliability of our control unit ensures that timestamp data can be collected even under adverse circumstances. Because they have their own power supply (alkaline or rechargeable batteries), the control unit continues to measure and record existing conditions during the outage. Up to 2 million data points can be stored, depending on the model. Timestamp data provides valuable information for identifying and verifying past events. In monitoring operations, where temperature or other parameters must be kept within a specific range (to ensure product or equipment quality), historical data can provide important information. The adverse environment will not affect the reliability of our system.

Our device has built-in statistical and mathematical functions to simplify data in the measurement field. Measurements can be processed and stored in the desired units of measurement (i.e. °F, °C, PSI, inch water column, inch pump column, etc.).

Measurement Functions

Each control unit has multiple channel types, and almost all types of sensors can be measured from a single unit. For example: a control unit can measure voltage, wind speed, air temperature, relative humidity, energy use, water temperature and steam pressure, as well as solar radiation, external temperature, wind speed and air quality. Channel types include analog (single-ended and differential), pulse, digital I/O, and switching excitation. Most sensors are directly connected to the control unit, eliminating the need for external signal conditioning. Multiplexers and other peripherals can be used to increase the number and type of channels.

Ability to Control

Because our control unit can perform responsive measurements and control sequences. The powerful onboard instruction set allows unattended measurement and control decisions based on temporal or conditional events. For example, if the water temperature of the boiler is out of the desired range, an alarm will be triggered, a phone number will be dialed, or the equipment will be turned off. Our system can even be controlled based on multiple conditions or events, such as: deciding to increase or decrease air exchange depending on time of day, external temperature, and/or internal temperature.

The Sensor

The system can use almost any sensor, allowing customization for each operation. Each of our control units has multiple channel types to flexibly measure many different types of sensors.

Communication

Communication options for reporting field conditions include:

• Ethernet

• Coaxial cable

• radio

• The phone

• Mobile phone

• Speech synthesis telephone

The system can be monitored and controlled by field or remote computer. You can even publish your data on the Internet.

Sample Application

In a typical HVAC application, sensors monitor relative humidity, flow rate, indoor temperature, outdoor temperature, differential pressure, and equipment status. In smaller operations, only one control unit is required. When a large number of sensors are used or there are many monitoring locations, additional control units are required. Based on the measured and expected results, the control unit drives proportional valves, boilers, heat exchange units, pumps, blowers, air handlers and other equipment to bring the building to the desired state. In the event of equipment failure (or other measurement event), the system can issue an alarm or call via telephone, radio, cell phone or other device. Data can be stored and/or transmitted to an on-site or central computer.