Lenze 8400 motec Manual - Manual (Page 58)

Installation
Installation according to EMC (installation of a CE−typical drive system)
Control cables
5
l
58 EDS84DG752 EN 4.0
Wiring on the motor side
(
Stop!
The motor cable is highly susceptible to interference. Therefore you will
achieve an optimum wiring on the motor side if you
ƒ exclusively use shielded and low−capacitance motor cables.
ƒ do not integrate any further cable into the motor cable (e.g. for blowers
etc.).
ƒ shield the supply cable for temperature monitoring of the motor (PTC or
thermostat) and install it separately from the motor cable.
Special conditions allow you to integrate the supply cable for temperature monitoring of
the motor into the motor cable: (
¶ 57)
}
Danger!
Uncontrolled motor movements can occur
If the motor cable is damaged, a short circuit between the brake control cables
and the motor cables can cause motor movements with low torque.
Possible consequences:
ƒ Personnel in the vicinity of the motor can be injured.
Protective measures:
ƒ Install motor cable in a protected way (e.g. in a cable duct).
5.2.3 Control cables
ƒ Control cables must be shielded to minimise interference injections.
ƒ Connect the shield correctly:
– Connect the shield of digital input and output cables at both ends.
– Connect the shield of analog input and output cables at one end (at the drive
controller).
ƒ To achieve an optimum shielding effect (in case of very long cables, with high
interference) one shield end of analog input and output cables can be connected to
PE potential via a capacitor (e.g. 10 nF/250 V) (see sketch).
9300vec043
Fig. 5−1 Shielding of long, analog control cables