Duplex Alarm with Controls

Model #: FOI-2890

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
oi_FOI-2980.png
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

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