In three-phase systems without distributed neutral in which the loads are balanced and symmetrical, an insertion can be made, i.e. two current transformers instead of three can be used; the instrument will calculate by difference the third phase which is not measured directly, considering it as identical to the other two. After having defined the type of instrument best suited to the needs, if the measurement is performed by indirect insertion, the accessories of the measuring system, such as current and voltage transformers must be chosen with care. The cable recommended in this type of connection is the Belden 9842, which has 2 twisted pairs. The parameters chosen for a current transformer are not only the rated current, the secondary current and the power, but also the type of assembly. The shielding may be braided (be formed by a mesh of thin conducting wires) or be a foil (consisting of a sheet of metal wound around the conductors): the two types are equivalent. By default, all 720 series key pads come with a standard set of commands which can be used to integrate with existing applications or used to build the metal keypad into new application developments.

Additionally, the Brainchild's standard Ethernet and optional RS-232/RS-422/RS485 communication enable users to access data onsite from a remote location via the RS serial interface or Ethernet networking. In addition to the ease of integration, minimum requirement of processing power and reliability of the connectors further helps to favor these serial over Ethernet communications.A device server is used to control the whole setup via a networking technology. A slave device may only speak when it is spoken to. It may be used to control video surveillance systems or to interconnect security control panels and devices such as access control card readers. Plus a lot of times the data rates are so slow on these bar code readers because they're only sending a few kilobits. Six plug and play I/O card slots are standard, and all readings are saved on the removable Compact Flash memory card's128MB storage space for archiving or transfer to a PC. CAS DataLoggers together with high-quality manufacturer Brainchild has the solution with the VR-18 Paperless Chart Recorder, a high resolution (true VGA, 640x480 pixels) 18-channel data logger featuring an infrared detector, plug & play I/O card, high flexibility, and user-friendly operation, all in a compact size.

2. USB - The USB can be a VIRTUAL COM PORT, to make communication a breeze, or USB HID so it can be plug and play for many applications. RS485 is primarily used in multi-drop configurations that make use of its balanced differential interface. Multiple function keys make navigation a snap and also allow users to quickly scroll backward to review historical trends. Users can browse through the alarm list or acknowledge alarms easily via function keys on the vertical bar. Flexible and rigid cables or bars for power transport can be installed in a power panel. Transformers can be of different types, depending on the assembly system: a through cable or a cable with a coiled primary, rs485 cable transformers for assembly on horizontal or vertical bars. In three-phase systems with distributed neutral three current transformers are required. For fixed laying Maximum shielding capacity in accordance with EMC requirements, Cable for Modbus bus systems, SUCOnet P, Modulink P, VariNet-P, Dry and damp environments, Suitable for various bus systems based on RS485 / RS422. The Modbus protocol further enables RS485 by allowing a master to send and receive data from specific sensors on the bus or to communicate with all the sensors simultaneously.

The recorder offers a fast sampling rate within 200msec for all channels and high accuracy with up to 18 universal input channels to connect to a variety of sensors commonly used in lab environments including DC voltage output from specialty sensors and thermocouples/RTDs to log temperatures with extreme precision. Electrone offers a range of flexible and highly configurable keypads with following features. For example, thermochemistry, the study of heat and energy associated with chemical reactions or physical transformations, is a perfect lab experiment application for the Brainchild. Not only that, it can also be used to know if there is water in any place or not; for example, positioned appropriately, it can be used to know if a tank or a drinking trough is full or empty, or if a well has reached a certain level (eg to stop pumping water). Some measuring instruments have bar indicators that show the current level as a percentage of the set full scale. Users now have the ability to monitor their live data and store all the information on the Brainchild itself or on a connected PC. Thanks to paperless chart recording technology; students and teachers are now able to clearly and conveniently visualize their experimental data.