Communication circuit, relay connecting circuit, and communication network

• Main Author: MORI, SETSURO
• Format: Patent
• Language: English; French; German
• Published: 19.09.2012
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The present invention provides a communication circuit, a relay connecting circuit, and a communication network that have a very simple configuration and high reliability, and can transmit/receive contact signals usable for automatic control. The present invention includes a transmitting section 4 for transmitting a contact signal input into an input/output section 3a, 3b to a communication line 2, a receiving section 5 for receiving a signal via the communication line 2, an input/output circuit 6 for outputting the contact signal received by the receiving section 5 via the input/output section 3a, 3b and interlocking to prevent input of another contact signal via the input/output section 3a,3b that outputs a contact signal, and a time division communication control section 7 for switching a communication direction among the transmission section 4, the receiving section 5 and the input/output circuit at time-divided timing.