7XV5662-0AC01
English
C53000-B1174-C165-4
35
Application
The communication converter copper (CC–CO) is a peripheral device linked to the protec-
tion device (see Fig. 10) which enables serial data exchange between two protection
devices. It uses a single pair of copper wires that may be part of a telecommunications cable
or of any other suitable symmetrical communications cable (no pup in cable).
At the opposite side (see Fig. 10), the data are converted by a second CC–CO so that they
can be read by the second protection device. The CC–COs (master/slave) thus allow two
protection devices to communicate and to exchange large data volumes over considerable
distances. For devices with asynchronous fibre-optic interface 7XV5662-0AC01 must be
used (e.g. 7XV5652, 7XV5653). Typical applications are the protection interfaces of differ-
ential protection.
The connection to the protection device is made interference-proof by means of a fibre-optic
link. This module is an optical 820 nm plug-in module in the protection device. The maximum
optical transmission distance is 1.5 km (0.93 mile).
The data transfer between the protection devices is realized as a point-to-point connection
that is bit-transparent. Data must be exchanged on dedicated pilot wires in a point to point
connection. Switching points are not allowed.
The CC–CO facilitates putting the entire communication path into operation. It has a relay
contact for the emission of a “device ready” signal (DR) and is equipped with a wide area
power supply unit which covers the entire normal DC/AC auxiliary voltage range.
Figure 10 Typical design of a communication path
CC 1
Protection
optical
electrical
FO
O
DTE
E
Protection
FO
CC 2
O
DTE
E
optical
electrical
S
L
A
V
E
M
A
S
T
E
R
Communication
converter
Communication
converter
Communication line
device 1
device 2
Pilot wire pair
Cable lengths
AWG 19/0.65 mm
2
: max. 12.1 km (7.56 miles)
AWG 26/0.13 mm
2
: max. 4.4 km (2.75 miles)
Fibre optic cable
Multimode fibre 62.5/125
µ
m
ST-plug, max. 1.5 km (0.93 mile)
AWG 22/0.32 mm
2
: max. 8 km (5 miles)
further values s. Technical Data
(AWG = American Wire Gauge)
