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Fiber Optic Data Communications  Modems MODEL LD485 |
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MODEL LD485 |
Asynchronous Switch Selectable RS-232, RS-422, RS-485 Modem |
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| LD4859T |
LD485BT |
TECHNICAL SPECIFICATIONS |
- Model: LD4859T / LD485BT / LD4859TS2 / LD4859BTS2
- Standards: TIA/EIA-232 (ITU-T v.28), TIA/EIA-422 (ITU-T v.11), TIA/EIA-485 (ISO/IEC8284)
- Connectors:
| Model # |
Connector A |
Connector B |
| LD4859T |
DB-9 Male |
850nm Multi-Mode Duplex-ST |
| LD485BT |
Terminal Block |
850nm Multi-Mode Duplex-ST |
| LD4859TS2 |
DB-9 Male |
1310nm Single-Mode Duplex-ST |
| LD485BTS2 |
Terminal Block |
1310nm Single-Mode Duplex-ST |
Note:
DB-9 can be selected as RS-232 or RS-485/422 by DIP switch.
RS-485 interface supports either 2- or 4-wire by DIP switch selection
- dBm:
| Model # |
Connector |
Max TX Pwr |
Min TX Pwr |
Sensitivity |
Power Budget |
| LD4859T |
MM Duplex-ST |
-10 dBm |
-16 dBm |
-29.5 dBm |
13.5 dBm |
| LD485BT |
MM Duplex-ST |
-10 dBm |
-16 dBm |
-29.5 dBm |
13.5 dBm |
| LD4859TS2 |
SM Duplex-ST |
-9 dBm |
-12 dBm |
-31 dBm |
19 dBm |
| LD485BTS2 |
SM Duplex-ST |
-9 dBm |
-12 dBm |
-31 dBm |
19 dBm |
- Data Transfer Rate/Max Distance:
| Connector |
Max. Rate |
Max. Distance |
| RS-232 |
115.2 kbps |
15 m (50 ft) |
| RS-422/485 |
90 kbps |
1,220 m (4,000 ft) |
| RS-422/485 |
500 kbps |
92 m (300 ft) |
| MM Duplex-ST |
Depends On Serial Interface |
2,000 m (6,600 ft) |
| SM Duplex-ST |
Depends On Serial Interface |
20,000 m (66,000 ft) |
- Handshaking: Not supported
- Duplex Mode:
RS-232 — n/a
RS-485 — (2-wire) half-duplex, (4-wire) full-duplex
- Cable/Max Distance:
50/125, 62.5/125, or 100/140µm multi-mode fiber
8.3/125, 8.7/125, 9/125, or 10/125µm single-mode fiber
24 to 22 AWG gauge copper wire, Attenuation 20dB/1000ft@10MHz, Differential Impedance 100W@10MHz
- LEDs: PWR, F ACT, C ACT
- Power Requirement: 1A@+5V DC
- Operating Temperature: 0° to 50° C
- Humidity: 5% to 90%
- Dimension: 26.2 x 70.3 x 94 mm (H x W x D)
- EMI Rating: FCC Class B, CE Mark
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