PH-TY series product is an industrial RS-232 data optical transceiver, which supports rate 0-115. 2M, DP9 interface is compatible with RS-232 data connector, meantime it supports industrial termination wiring, single optical port/dual optical port chain network, it supports RS232 protocol. 35mmDIN, DC 9-30V power supply. PH-TYRS232222 supports two cascadable upstream and downstream optical fiber interfaces, one data interface, PH-TYRS232221 supports one optical fiber interface and one data interface.