Hitachi 670 Series Application Manual page 72

Section 5

Communication set-up

IEC06000393 V3 EN-US

Figure 64:

Table 19:

Characteristic

Type of LDCM

Type of fiber

Peak Emission Wave length

Nominal

Maximum

Minimum

Optical budget

Multi-mode fiber glass 62.5/125 mm

Multi-mode fiber glass 50/125 mm

Optical connector

Protocol

Data transmission

Transmission rate / Data rate

Clock source

1) depending on optical budget calculation

2) Applicable for revision r11 of MR LDCM and later.

3) C37.94 originally defined just for multi-mode; using same header, configuration and data format as C37.94

66

MR-LDCM and LR-LDCM layout with two PCI connectors and one I/O FC/PC

type connector

Line data communication module

Class 1 laser product. Take adequate measures to protect the eyes. Never look into the

laser beam. Complies to laser safety classification according to IEC 60825-1.

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IEC06000393-3-en.vsdx

Range or value

Short range (SR)

Medium range (MR)

Multi-mode fiber

Single-mode fiber

glass 62.5/125 µm

glass 9/125 µm

Multi-mode fiber

glass 50/125 µm

820 nm

1310 nm

865 nm

1330 nm

792 nm

1290 nm

18.8 dB (typical

28.8 dB (typical

distance about 3

distance 80 km/50

1)

km/2 mile

mile

30.8 dB

11.8 dB (typical

distance about 2

1)

km/1 mile

Type ST

Type FC/PC

C37.94

C37.94

implementation

Synchronous

Synchronous

64 kbit/s

64 kbit/s

Internal or derived

Internal or derived

from received signal

from received signal

1MRK505382-UEN Rev. K

Long range (LR)

Single-mode fiber

glass 9/125 µm

1550 nm

1580 nm

1520 nm

28.7 dB (typical

distance 120 km/75

1)

1)

mile

2)

Type FC/PC

C37.94

3)

implementation

Synchronous

64 kbit/s

Internal or derived

from received signal

Communication set-up, 670/650 series

Application Guide

M12756-1 v14

3)