Hirschmann OZD FIP G3, Руководство пользователя

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1 Introduction
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OZD FIP G3 … Version 3.2 08/07
Fiber-optic technology
The implementation of fiber-optic technology permits
very long transmission ranges and provides optimum
protection against EMI effects both along the trans-
mission link and (owing to the electrical isolation) at the
repeaters themselves.
Data rate
The fiber-optic FIP repeater OZD FIP G3 … functions at
a data rate of 1 MBit/s (as defined in EN 50 170).
Signal regeneration
The fiber-optic FIP repeater OZD FIP G3 … regenerates
the signal shape and amplitude of the received data.
This function permits any number of repeaters to be
cascaded via optical links.
Redundancy
Redundant optical signal transmission ensures a very
high degree of transmission reliability.
Redundant operating voltage supply can increase
operational reliability even further.
Device vaiants
The Fiber-Optic FIP Repeaters OZD FIP G3 … are
available as OZD FIP G3 (GS) without an integrated bus
termination and as OZD FIP G3 T with an integrated
bus termination.
FIP protocol
In a network topology as shown in Fig. 2, 3 and 4 (Ch. 2), a
response time must be taken into consideration at the
arbiter and in the data terminal equipment.
The data which is sent out, is returned to each optical
port by the neighboring device. This status signal is used
to monitor the output and the rings.
The response time is composed of the transfer time in
the optical fiber (5 ns/m) and the transfer time through a
repeater (< 1µs):
t
response
= (2
•
l [m]
•
5 ns/m) + 1 µs
= (10 µs/km
•
l [km]) + 1 µs
where
l = maximum length occuring between two adjacent
OZD FIP G3 … .
Example:
At a maximum distance between two adjacent OZD FIP
G3 … of 2.5 km, the response time is as follows:
t
response
= (2
•
2500 m
•
5 ns/m) + 1 µs
= (10 µs/km
•
2.5 km) + 1 µs
= 26 µs