The FOM-1090 and FOM-1091 fiber optic isolator\modem cards provides for full synchronous, asynchronous, or isochronous interfacing to serial data communications equipment. The unit is transparent to all data formats and protocol, and supports timing from the DCE and DTE as well as uncommon clocking styles such as gapped clock or gated clocks that stop in different states to indicate status. The status and direction of all supported signals is shown on front panel indicators in addition to power supply and optical link status for each card.
The user can achieve complete electrical isolation for NRZ data communications in areas of high electrical noise or in/out of RF shielded enclosures (SCIF). The fiber optic cable is not susceptible to induced impulse noise and since signal ground is not carried over the link, the signal is not affected by elevated ground potential from lightning or other sources. The fiber optic cable enhances privacy of communications. While a typical link consists of a FOM-1090 (DCE) at one end and a FOM-1091 (DTE) at the opposite end, a pair of the same units may be used together as when using two FOM-1090 DCE units to create a null modem link. In addition, a different interface may be selected at each end allowing the user to create a fiber link between two electrically incompatible interfaces without requiring a separate interface converter.
Synchronous, Asynchronous or Isochronous Signal rates: DC to 20 MHz
Supported Interface Standards
- TIA-232
- TIA-530, TIA-530A
- TIA-574 (w/ adapter cable)
- TIA-449 (w/ adapter cable, using common subset of control signals)
- V.35 (w/ adapter cable)
- X.21 (w/ adapter cable)
Supported Electrical Standards
- TIA-422 / V.11 / FED-STD-1030A
- TIA-423 / V.10 / FED-STD-1020A
- TIA-232 / V.28
- V.35
- MIL-STD-100
- MIL-STD-188-114A, Balanced types 1 and 2 (in V.11 mode)
- MIL-STD-188-114A, Unbalanced (in V.10 mode)
- MIL-STD-188C (Limited compatibility – see section on Compatibility with MIL-STD Circuits)
| ELECTRICAL SPECIFICATIONS | ||||
|
Min
|
Typ
|
Max
|
||
| Power Requirement | Voltage Range (V) |
20
|
24
|
34
|
| Supply Current (mA) |
-
|
400
|
-
|
|
| TIA-422 / V.11 / FED-STD-1030A Signals |
Min
|
Typ
|
Max
|
|
| Output Levels into 100Ω Load (V) |
±2
|
-
|
±6
|
|
| Input Levels (V) |
0
|
-
|
±7
|
|
| Input Threshold (V) |
±0.2
|
-
|
-
|
|
| Maximum Speed, Data and Clock Lines (MHz) |
0
|
-
|
25
|
|
| Maximum Speed, Control Lines (KHz) |
0
|
-
|
250
|
|
| Input Termination (4KΩ min w/ no termination) (Ω) |
-
|
100
|
-
|
|
| TIA-423 / V.10 / FED-STD-1020A Signals |
Min
|
Typ
|
Max
|
|
| Output Levels Open Circuit (V) |
±4
|
-
|
±6
|
|
| Input Levels (V) |
0
|
-
|
±7
|
|
| Input Threshold (V) |
±0.2
|
-
|
-
|
|
| Maximum Speed (KHz) |
0
|
-
|
250
|
|
| Input Termination (KΩ) |
4
|
15
|
-
|
|
| TIA-232 / V.28 Signals |
Min
|
Typ
|
Max
|
|
| Output Levels, 3KΩ Termination (V) |
±5
|
-
|
±15
|
|
| Input Levels (V) |
0
|
-
|
±15
|
|
| Input Threshold (V) |
±3
|
-
|
-
|
|
| Maximum Speed, Data and Clock Lines (KHz) |
0
|
-
|
125
|
|
| Maximum Speed, Control Lines (KHz) |
0
|
-
|
125
|
|
| Input Termination (KΩ) |
3
|
-
|
7
|
|
| V.35 Signals |
Min
|
Typ
|
Max
|
|
| Output Levels, 100Ω Termination (V) |
±0.44
|
-
|
±0.66
|
|
| Input Levels (V) |
0
|
-
|
±4
|
|
| Input Threshold (V) |
±0.2
|
-
|
-
|
|
| Maximum Speed, Data and Clock Lines (MHz) |
0
|
-
|
20
|
|
| Input Termination (Ω) |
90
|
-
|
110
|
|
| V.28 Signals |
Min
|
Typ
|
Max
|
|
| Output Levels, 3KΩ Termination (V) |
±5
|
-
|
±15
|
|
| Input Levels (V) |
0
|
-
|
±15
|
|
| Input Threshold (V) |
±3
|
-
|
-
|
|
| Maximum Speed (KHz) |
0
|
-
|
125
|
|
| Input Termination (KΩ) |
3
|
-
|
7
|
|
| Receiver Off Impedance (Ω) |
300
|
-
|
-
|
|
| Environmental | Storage Temperature (°C) |
-40
|
-
|
85
|
| OperatingTemperature (°C) |
0
|
-
|
50
|
|
| Interface Connector | All | DB-25 Male | ||
| PHYSICAL SPECIFICATIONS | ||||
|
Length
|
Width
|
Height
|
Weight | |
| Card Dimensions |
11.25 in (286 mm)
|
0.825 in (21 mm)
|
5..25 in (133 mm)
|
10 oz (0.3 kg)
|
| OPTICAL CHARACTERISTICS - All | |||||||
|
Order Suffix
|
Fiber
|
TX Std*
|
Max Dist (km)
|
ʎ (nm)
|
Bandwidth Typ (dB)
|
Loss (dB)
|
Connector
|
| T10 |
Multimode
|
OM2
|
0.40
|
850
|
12.5
|
5.7
|
ST
|
| L10 |
Multimode
|
OM2
|
0.40
|
850
|
14.5
|
5.7
|
LC
|
| T5A |
Singlemode
|
OS1, OS2
|
10
|
1310
|
14.0
|
8.5
|
ST
|
| L5A |
Singlemode
|
OS1, OS2
|
10
|
1310
|
12.75
|
8.5
|
LC
|
| C | SFP Cage with no Optical Module Installed | ||||||
| * Specs obtained assuming fiber is as described in 'TX Std' with a 1.25GB Data Rate | |||||||
| Standalone Operation | |
| SAC-1-AC | Standalone AC Power Supply |
| Chassis Mounting | |
| RMC-5000 | 4U, 19" Rack Mount Chassis. Holds up to 16 FOM Modules |
| PSM-5000 | Spare AC Power Supply for RMC-5000 |
| PSM-5000-D | Spare DC Power Supply for RMC-5000 |
