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Number of Serial Ports:

Number of Analog I/O Points:

Number of Digital I/O Points:

Memory Size:

Communications:

Features:

Help with Remote Terminal Units (RTUs) specifications:

Specifications
   Number of Serial Ports       Includes all serial type communications protocols such as RS-232, RS-485, and RS-422. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Number of Analog I/O Points       Refers to the total number of analog input and output ports. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Number of Digital I/O Points       Refers to the total number of digital input and output ports. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Memory Size       This is the on board memory capacity stated in Megabytes. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Communications
           
   Your choices are...         
   Serial - RS-232 / 422 / 485       A serial communications protocol such as RS-232, RS-422, or RS-485. 
   4-20 mA       Commonly referred to as current loop communications. The current signal is converted into a voltage signal at the point of acquisition so can be read as a numerical. 
   Ethernet       Ethernet refers to the family of local-area network (LAN) products covered by the IEEE 802.3 standard. It is a protocol used in high-speed data transfer systems. 
   Fiber Optic       Fiber optics are arranged in bundles called optical cables and used to transmit light signals over long distances. 
   LCD Display       The RTU ahs a small LCD display for rapid local monitoring and interrogation 
   Programmable Logic Controller (PLC)       A device used to automate monitoring and control of industrial plant. Can be used stand-alone or in conjunction with a SCADA or other system. 
   Radio       Some RTUs have radios to communicate with the master unit. 
   Telephone       Some RTUs have telephone connections such as the RJ series to communicate with the master unit. 
   Video       Video and data that is transmitted via the Public Switched Telephone Network (PSTN), over dedicated lines, microwave and radio links and via company networks and Intranets. 
   Web Enabled       Some RTUs use the world wide web to communicate with the master unit. 
   Other       Other unlisted, specialized, or proprietary communications. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Features
           
   Your choices are...         
   Alarming       Any of a number of methods used to alert the operator that a condition has been met or exists. Some types of alarming are audible such as buzzers or visual such as blinking lights. 
   Auto Dialing       Auto dialing allows the RTU to automatically dial in to a non-dedicated phone number when data needs to be transferred. 
   Battery Back Up       A battery back up is used in RTUs as a way to insure any stored data is not lost in the event of main power failure. It may, in some instances, also provide sufficient power to continue operation until main power is restored. 
   Data Logging       The ability of the RTU to automatically record and store data as a function of time internally. There is an internal block of memory used to record and store this data. 
   Differential Inputs       A method for eliminating electrical noise on small amplitude signals at the input to an instrument. 
   Environmental Monitoring       An RTU that is used to monitor any indoor or outdoor environment such as weather instruments or dangerous gases in plant processes. 
   Expansion Card       A printed circuit board that extends the operational capability of the RTU. This extension could be extra memory for data storage or additional processing power. 
   Intrinsically Safe       Intrinsically safe refers to the ability of the RTU to operate safely in hazardous environments. 
   Isolated Inputs       An isolated input is one where the electrical signal at the input is converted into an optical signal over a very short distance and converted back to an electrical signal. 
   PID Control       PID Control or Proportional, Integral, Derivative Control, is a method used to tune a signal in a closed loop control system. 
   Process Monitoring       An RTU that is used to monitor any indoor or outdoor process such as oil wells or manufacturing cells. 
   Rack Mountable       The RTU has a form factor that will fit into a standard 19-inch equipment rack or enclosure. 
   Real Time Clock       A real-time clock (RTC) is a battery-powered clock that is included in a microchip in a computer. The time values are for the year, month, date, hours, minutes, and seconds. 
   Redundant RTU       A complete RTU that contains all the transceivers, encoders, and processors needed to function normally in the event the primary RTU is lost. 
   Software       Any product specific software that is used during the operation of the RTU. This includes communications and system operation control programs. 
   Totalizing       A totalizer is used to keep an accurate count over a long period of time. 
   Weather Tight Enclosure       Weather tight enclosures are any enclosure that is constructed to resist moisture, chemical, dust or any kind of environment that would damage the equipment inside it. 
   Other       Other unlisted, specialized, or proprietary features. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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