Forming The Bus Cable - Siemens simovert masterdrives CBP/CBP2 Mode D'emploi

05.2006
4.4.2

Forming the bus cable

Fiber-optic cables
Connecting the
cable
Siemens AG 6SE7087-6NX84-0FF5
SIMOVERT MASTERDRIVES
Plastic fiber-optic cables are used for connecting the optional board to
SIMOLINK.
The distance between two nodes is permitted to be up to 40 m. The
total length of the ring bus is permitted to be up to 1000 m.
Proceed as follows to connect up the fiber-optic cable:
Cut off fiber-optic Insert fiber-optic
cable cable into connector
Fig. 4-4 Connecting the cable
1. Cut off the required length of fiber optic cable by cutting at right
angles to the cable. Use a sharp knife for this purpose (Fig. 4-4
2. Remove approx. 7 mm in length of the black sheathing from the
fiber optic cable with a suitable insulation stripper. Damage to the
fiber optic cable must be avoided at all costs!
3. Put the fiber optic cable into the plug-in connector (Fig. 4-4
push it into the cylindrical sleeve as far as it will go. The transparent
fiber optic cable then protrudes from the sleeve.
4. Fold round the gripping halves of the plug-in connector and close it
by hand (Fig. 4-4
lower one, the cable is fixed firmly in the connector.
5. Cut off the fiber optic cable protruding out of the sleeve. Use a
sharp knife to do this and cut off the cable almost flush. Cut at right
angles to the axis of the fiber optic cable. A side cutter, scissors,
etc., are not suitable for this purpose.
6. The cut surface of the fiber optic cable must now be polished. To do
this, place the end of the sleeve vertically onto the matt rough side
of the green polishing foil supplied and "draw" a figure eight. Then
clean the end with a clean, fluff-free cloth.
7. In order to achieve minimum throughput loss, the end can then be
fine-polished. Fine polishing improves throughput loss by
approximately 2 dB. To do this, again place the end of the sleeve
vertically onto the matt rough side of the pink polishing foil and
"draw" a figure eight about 25 times. Then clean the end again with
a clean, fluff-free cloth.
If the fiber optic cable connections between the SLB modules are not in
good order or have been damaged (e.g. kinked), it can happen that the
SIMOLINK will continue to function. Depending on how badly
transmission is affected, CRC or timeout errors will occur (possibly after
a considerable time has elapsed). The errors will occur in the
SIMOLINK module that is downstream (in the transmission direction) of
the bad connection. The occurrence of such errors can be tested with
the aid of diagnostics parameter r748 (see function diagram 140). The
Option boards
Close
connector
). When the top gripping half latches into the
SLB – SIMOLINK Board
).
) and
4-5