The FOI-2890 provides complete electrical isolation for 4 channels of control signals and relay closures and 2 channels of asynchronous or synchronous RS- 232 communications. During power failures or interruptions, the relays will hold the last commanded state until powered is restored and commanded differently.

Typical applications include:

• Alarm Indicators
• Lock Actuators
• HVAC Instrumentation and Control

TIA/EIA-232 (RS-232) compatible with:

• TIA/EIA-562 (RS-562)
• MIL-STD-188C

The unit 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. FiberPlex recommends “R” units for high security applications because the units have added filtering and shielding for RFI suppression. In addition, fiber optic cable offers much longer transmission distances than copper wiring. Multimode optics on the unit can extend the distance to 2km, while singlemode optics can further extend the distance to 20km. A typical link consists of two FOI-2890, one at each end of the network, with a duplex fiber optic cable between them.

Flexible Mounting and Powering Options

The FOI-2890 is part of the FOI line of products designed for ruggedized mil applications. It is housed in the familiar FOI shielded can enclosure. For standalone applications they can be powered by adding a PSQ-2909 AC supply or a PSQ-2920 DC power supply (not included). Optionally, up to 8 FOI units can be mounted on CMA chassis adapters and installed in an RMC-3101 or RMC-2101 rack mount chassis. The units are powered redundantly by a common back plane connection.