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.

Four 0 to +5 VDC Inputs
Four SPST Form A Relay Closures
Two TIA/EIA-232 (RS-232) TX and RX
Data Rate: DC to 230 kbps

ELECTRICAL SPECIFICATIONS
				Min	Typ	Max
Power Requirement	Voltage Range (V)			7	9	12
	Supply Current (mA)			-	150	-

RS-232	Data Rate (kbps)			DC	-	230
	Sampling Jitter (%)			0	-	15
	Input Resistance (kΩ)			3	5	7
	Input Voltage Range (V)			-25	-	25
	Output Voltage Swing (V)			±3.7	±5	±6

Control Signals for Relay Closure	Data Rate (kbps)			DC	-	9.6
	Sampling Jitter (%)			0	-	10
	Input Voltage Range (V)			0	-	5
	Output Voltage Swing (V)			0	-	5

Relay Contact Data	Nominal Switching Capacity			1A at 30VDC
				0.5A at 125VAC

Environmental	Storage Temperature			-40	-	85
	OperatingTemperature			0	-	50

Interface Connector	DB-25 Female
PHYSICAL SPECIFICATIONS
			Length	Width	Height	Weight
Case Dimensions		Size 2	4.5 in (114 mm)	1.312 in (33 mm)	2.562 in (65 mm)	2 lb (0.9 kg)
OPTICAL CHARACTERISTICS - All
Fiber	Size	Max Distance	Wavelength	Output Power	RX Sens	Loss Budget
Multimode	62.5 / 125 μm	2 km	820 nm	-18 dBm	-30 dBm	12 dB

Datasheet

Standalone Operation
PSQ-2909	Standalone AC Power Supply
PSQ-2920	Standalone DC Power Supply
WMA-3002	Wall Mount Adapter
WMA-2001	Wall Mount Adapter with ST Optical Patch
Chassis Mounting
RMC-2101	2U, 19" Rack Mount Chassis. Holds up to 9 FOI Modules
CMA-2001	Chassis Mount Adapter for RMC-2101 Chassis. (1) per FOI Module required
PSM-2010	Spare Power Supply for RMC-2101
RP2	16 Channel Modular Bolt-On Connector Panel for RMC-2101

RMC-3101	3U, 19" Rack Mount Chassis. Holds up to 9 FOI Modules
CMA-3002	Chassis Mount Adapter for RMC-3101 Chassis. (1) per FOI Module required
PSM-3010	Spare Power Supply for RMC-3101
Industrial Solutions
RMC-3700	Environmental Enclosure for FOI Modules
CMA-3002	Chassis Mount Adapter for RMC-3101 Chassis. (1) per FOI Module required
PSM-3010	Spare Power Supply for RMC-3101