General Specifications
Original instructions
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Introduction
This section gives the 140 NRP 954 00 fiber optic repeater module specifications.
WARNING
UNINTENDED EQUIPMENT OPERATION
Do not exceed any of the rated values specified in the following tables.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
General Specifications
Bus Current Required
700 mA
Power Dissipation (Typical)
5 W
Inrush Current
1 A typical @ 5 Vdc
Data Transfer Rate
1.544 Mb for remote I/O with Manchester encoded data
Bit Error Rate
10-9 over specified Optical Receiver Dynamic Range
Optical Interface
ST-Type connector
Wavelength
820 nm
Power Loss Budget
(includes 3 dB of system margin)
50/125 µm fiber –7.0 dB
62.5/125 µm fiber –11 dB
100/140 µm fiber –16.5 dB
Maximum Distance for Point–to–Point Connection
2 km over 50/125 µm fiber @ 3.5 dB/km
3 km over 62.5/125 µm fiber @ 3.5 dB/km
3 km over 100/140 µm fiber @ 5 dB/km
Limits in Bus or Self-Healing Ring Configurations
12 fiber optic repeater modules with a maximum length of fiber optic cables of 16 km (back-loop included in Self-healing ring configuration).
NOTE: The maximum length is between the CRP module (the farther one in a Hot Standby (HSBY) system) and the last CRA module.
Coaxial Interface
F type female connector with a right-angle F adapter connector
NOTE: Required torque to fasten the right-angle F adapter is 0.46...0.60 N•m (4.1...5.3 lbf-in).
Coaxial Termination
Internal 75 ohms
Coaxial Shield
Tied to ground
Coaxial Dynamic Range
35 dB
Coaxial Sensitivity
70 mV pk-pk max
Relay Diagnostic
Rated at 220 Vac 6 A / 30 Vdc 5 A
NOTICE
DESTRUCTION OF ADAPTER
  • Before tightening the locknut to the torque 0.46...0.60 N•m (4.1...5.3 lbf-in) be sure to properly position the right-angle F adapter connector.
  • During tightening be sure to maintain the connector securely.
  • The locknut must be loosened before handling the connector. For this reason, it is recommended to attach the S908 coaxial cable to the chassis to avoid any mechanical stress on the right-angle F adapter connector.
  • Do not tighten the right-angle F adapter beyond the specified torque.
Failure to follow these instructions can result in equipment damage.
Optical Transmitter Specifications
Optical Power (Measured with 1 m test fiber)
–13.0...–20.0 dBm average power in 50/125 µm fiber cable
–10.0...–16 dBm average power in 62.5/125 µm fiber cable
–4.0...–10.5 dBm average power in 100/140 µm fiber cable
Rise/Fall Time
20 nsec or better
Silence (OFF Leakage)
–43 dBm
Optical Receiver Specifications
Receiver Sensitivity
–30 dBm average power
Dynamic Range
20 dB
Detected Silence
–36 dBm
Reliability
MTBF
1,300,000 hours (minimum) @ 30 °C, assuming fixed ground and component stress within maximum specifications.