17.2.2 Communication Cables
Please connect the communication interfaces only with high-quality cables according to
the relevant standards.
NOTICE
Ungrounded test setups
→ So-called "flying test systems" that are not or not sufficiently grounded can cause
damage to the communication interfaces or to the connected devices.
USB
The USB cable must have a maximum length of 5 m according to the USB regu-
lations. We recommend high-quality cables with integrated ferrite cores (available at
SIEB & MEYER).
Note
Trouble-free USB communication is also highly dependent on the quality of the USB in-
terface at the used PC/laptop.
RJ45
Use only high-quality RJ45 cables.
Low priced RJ45 cables can damage the female RJ45 connector. The dimensions of
the cable connectors deviate frequently from the standard dimensions. Thus, they cause
problems with the electrical contact after only few connecting cycles.
17.2.3 Cables for the Rotor Position Detection
Use shielded lines and shielded D-sub shells for wiring the different measuring systems.
The shield must be connected to the D-sub shell at the servo module side and to the
housing of the measuring system.
Examples for the use of conductors:
▸
Motors with resolver
LIYCY 3 x 2 x 0.14 or 4 x 2 x 0.14 for motors with integrated thermal contact. Con-
ductors: shielded, twisted in pairs. Twist mode: sine/sine, cosine/cosine, rotor/rotor
and, if necessary, thermal contact/thermal contact.
For delicate applications we recommend to additionally shield the separate pairs.
▸
Motors with incremental encoder
LIYCY 5 x 0.14 or 7 x 0.14 for motors with integrated thermal contact.
▸
Motors with Hall effect sensors and tachometer generator
LIYCY 9 x 0.14 or 12 x 0.14 for motors with integrated thermal contact.
17.2.4 Cables for the External Ballast Resistor
The cables of the external ballast resistor of R
EX
and +UB must be twisted. If the cable
is longer than 20 cm a shielded cable must be used.
171Drive System SD2 - Hardware Description
General Information Regarding the Wiring
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