FOI-4451-R-ST - Isolator for EIA-530/RS-422, for connection to DCE, RFI Suppresed, 6 Mbps, Multimode ST optics, Power Options So
by PATTON

The Patton Model FOI-4451-R-ST provide end-to-end conversion, extension, and electrical isolation of EIA-530/RS-422 circuits. Multimode optics extends the distance to 2km, while singlemode optics extends the distance to 20km. The FOI-4451 and FOI-4541 both provide complete electrical isolation for RS- 422 communications. The units can be used in areas of high electrical noise or in and out of RF shielded enclosures. The fiber optic cable is not susceptible to interference caused by impulse noise, crosstalk, or EMI. Privacy of communications is also enhanced because the fiber optic cable does not radiate any emissions. Patton recommends “T” units for high security applications because they have been TEMPEST tested and approved.

The units are transparent to all handshaking protocols, and can accept data and clock signals up to 6.144 Mbps. A regeneration switch on the FOI-4451 enables users to toggle between synchronous applications that require send timing (ST), and asynchronous or synchronous applications that require terminal timing (TT). They support tail circuit and null modem functions for DCE to DCE or DTE to DTE communications. An alternate interface (V.35 or RS-232) may be installed at the opposite end creating isolated interface converter.