The FOI-2591 and FOI-2951 both provide complete electrical isolation for RS-422 communications. The units are transparent to all handshaking protocols and can accept data and clock signals up to a maximum rate of 256 kbps. A regeneration switch on the FOI-2591 allows 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. This requires two of the same FOI units. An alternate interface (V.35 or RS-232) may be installed at the opposite end, allowing the user to create a link between two electrically incompatible interfaces without requiring a separate interface converter.
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. FiberPlex recommends “R” units for high security applications because they have added filtering and shielding for RFI suppression. In addition, fiber optic cable offers much longer transmission distances than traditional RS-422 cabling. Multimode optics on the units can extend the distance to 2km, while singlemode optics can further extend the distance to 20km. A typical link consists of an FOI-2591 at the Data Communication Equipment (DCE) and an FOI-2951 at the Data Terminal Equipment (DTE) with a duplex fiber optic cable between them.
Flexible Mounting and Powering Options
The FOI-2591 and FOI-2951 are part of the FOI line of products designed for ruggedized mil applications. They are 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.
- Serial Data to Fiber
- Data Rate: DC to 256 kbps
Compatable with:
- TIA/EIA-422
- MIL-STD-188-114A balanced type 1
- FED STD 1030A
| ELECTRICAL SPECIFICATIONS | ||||||
|
Min
|
Typ
|
Max
|
||||
| Power Requirement | Voltage Range (V) |
7
|
9
|
12
|
||
| Supply Current (mA) |
-
|
375
|
-
|
|||
| Balanced Differential Signals | Data Rate (kbps) |
DC
|
-
|
256
|
||
| Sampling Jitter (%) |
0
|
-
|
17
|
|||
| Input Resistance (kΩ) |
12
|
15
|
-
|
|||
| Common-Mode Input Voltage (V) |
-
|
-
|
±7
|
|||
| High-Level Output Voltage (V) |
2.4
|
-
|
-
|
|||
| Low-Level Input Voltage (V) |
-
|
-
|
0.5
|
|||
| Unbalanced Single Ended Signals | Data Rate (kbps) |
DC
|
-
|
9.6
|
||
| Sampling Jitter (%) |
0
|
-
|
10
|
|||
| Input Resistance (kΩ) |
3
|
5
|
7
|
|||
| Input Voltage Range (V) |
-30
|
-
|
-30
|
|||
| Output Voltage Swing (V) |
-
|
±5
|
-
|
|||
| Environmental | Storage Temperature (°C) |
-40
|
-
|
85
|
||
| OperatingTemperature (°C) |
0
|
-
|
50
|
|||
| Interface Connector | FOI-2591 | DB-25 Male | ||||
| FOI-2951 | DB-25 Female | |||||
| PHYSICAL SPECIFICATIONS - All | ||||||
|
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 | ||||||
|
Fiber
|
Size
|
Max Distance
|
Wavelength
|
Output Power
|
RX Sens | Loss Budget |
|
Multimode
|
62.5 / 125 μm
|
2 km (10Base) 300m (100Base)
|
820 nm
|
-18 dBm
|
-30 dBm | 12 dB |
| Singlemode | 9 /125 μm | 20 km | 1300 nm | -15 dBm | -32 dBm | 21 dB |
| 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 |
