Use this function to order replacement parts for a system you have already installed or to order the parts needed to communication interface modules needed to complete a computer readable meter system. If you choose Current Transformers or Displays, you will see a second screen that will let you choose the type you need.
The accessories not described in the other help pages are:
RS-232 to Twisted Pair Interface, Model 4810. This module is needed whenever you install one or more computer readable meters that use power line or twisted pair communications. Usually only one is required and it is installed near the computer that will read the meters. However, there may be several of them and they may be located near the meters if they are connected to a telephone modem, a radio, or a TCP/IP network.
Twisted Pair to Power Line Interface, Model 4820. This module is only used if you are using the power lines for communication. It is usually installed near the main panel where it can connect to all phases. It connects the power lines to the Model 4810 RS-232 interface through a twisted pair of wires. CAT5 LAN wire is suggested. Some users have successfully used telephone wire when it was already in place.