The new RelComm, Inc. integrated Code Operated Switch (i-COS) is a platform to provide service to multiple serial ports, typically under the control and direction of a single Master port, and four or more subordinate/Slave ports.
RELCOMM RCL684 Current Loop
Current loop devices are ideal for use in noisy industrial environments, and because they are transparent to protocol or format,they can provide service in difficult situations
SERIAL CABLE BOOSTER
The RelCom, Inc. Serial Cable Booster can double the maximum length of an RS-232C cable.This is done by actively receiving and re-transmitting the most common signal lines of the RS-232C interface.