Black Box MT1000A-13-R3, Быстрый старт

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MT1000A Installation and Operation Manual Chapter 1 Introduction
Functional Description 1-3
1.3 Functional Description
MT1000A contains the following printed circuit boards:
•
One main circuit board that includes four tributary interfaces
•
One or two fiber optic interface boards (A and B)
• One or two power supplies (A and B): AC/48 VDC wide-range power supply
or 24VDC power supply.
Fiber Optic Link
Fiber Optic Link Interface Characteristics
The fiber optic interface can be used to provide a secure link in hazardous or
hostile environments, increase the maximum connection range, and achieve
immunity against electrical interference and protection against the harmful effects
of ground loops.
The fiber optic interface complies with the requirements of ITU-T Rec. G.956, and
uses a proprietary signaling format that ensures optimum performance. To
optimally meet a wide range of system requirements, the fiber optic interface can
be ordered for operation over 62.5/125 micron multi-mode fibers (typical
attenuation 3.5 dB/km at 850 nm), as well as over low-loss 9/125-micron single-
mode fibers (typical attenuation 0.4 dB/km at 1310 nm, and 0.25 dB/km at 1550
nm). Most of the options can be ordered with ST, SC, or FC/PC connectors. In
addition, 9/125-micron single mode over a single fiber is also available (with SC
connectors only).
The SF3 option uses an SC/APC connector. The FO cable connected to it must
therefore be of the same type.
Table 1-1 provides information on the characteristics of the optical sub-system,
including the maximum range over typical fiber optic cable. The maximum range
values given in the table assume a 3 dB margin.
Note