First line: 4542 ADAM-4542 ADAM-4541/4542 Fiber Optic RS-232/ 422/485 ConverterAbstract: .. ADAM-4541/ ADAM-4542 can be used as an RS-232/422/485 point-to-point or point-to-mutipoint connection for transmitting and converting full/half-duplex signals and their equivalents .. Tags: ADAM-4542ADAM-45414541ADAM-4541 4542