Black Box - transceiver - RS-232

RS-232/V.24- Current Loop Interface Converters II- Our most versatile Current Loop converter! AC-powered active or passive- configure this powered converter to match your system's 20- 30- or 60-mA Current Loop interface. Use the 4-screw terminal block to connect the twisted-pair cable and plug an RS-232 cable into the DB25 connector to a modem or mux. Flip the switch to attach a terminal or computer. Optical isolators keep out electrical interference.