Siemens SIMATIC NET 12M Operating Instructions Manual page 17

Connecting up
Follow the steps below to connect the bus cable:
1. Open the bus cable at the point at which the bus terminal will be inserted.
2. Strip approximately 33 mm of the outer jacket. Make sure that the braided shield is not
3. Shorten the braided shield and foil shield to a length of approximately 12 mm (the foil
4. Fold back the braid shield over the cable jacket.
5. Strip approximately 10 mm from the end of the wires.
6. Fit the bus cable to the terminal so that the braided shield is lying directly under the cable
7. Screw the ends of the wires to the appropriate terminals (if the cores are stranded, for
8. If the bus terminal is at the start or end of a segment, the integrated terminator must be
Note
The shield clamps are used solely to contact the shields and are not suitable as strainrelief
clamps. This means that the bus cables must be secured as close as possible to the 12M
bus terminals to provide mechanical strain relief.
Note
If the terminating resistor is activated (permitted only at the segment ends), the terminal pair
A1, B1 must be used (A2, B2 are disconnected from the segment).
During operation of the bus terminal in the segment, it requires 5 V to be supplied by the
DTE. The DTE must therefore be turned on and the D-sub male connector inserted and
secured by screws! Due to the necessary termination at the start and end of the segment,
the DTE connected there must not be turned off.
12M bus terminal
Siemens Distributor
Operating Instructions, 07/2013, C79000-G8976-C333-01
damaged when you strip the jacket.
shield can be left somewhat longer) and shorten the two fillers to a length of
approximately 12 mm.
①
Filler
②
Foil shield
③
Fold back braided shield over the cable jacket
clamp.
example, the trailing cable, 0.25 mm
used).
activated (switch set to Termination on).
2.2 Mounting and attaching the bus cable(s)
wireend ferrules complying with DIN 46228 must be
2
Installation
17