CONVERTER OPTICAL FIBRE TO RS232 CONVERTER OPTICAL FIBRE CABLE TO RS232. UP TO 115 KBD. AUX.VOLTAGE: 24 – 250V DC AND 110 – 230V AC. WITH ALARM RELAY CONNECTION RS232 INTERFACE VIA 9POL. SUB-D-PLUG. CONNECTION OPTICAL FIBRE INTERFACE 820NM, ST PLUG. FOR MOUNTING ON RAIL. METAL HOUSING.