14
3 Installation
3.2 EMC compatible installation
CAUTION!
Length of the connection leads!
The maximum length of the connection leads is limited.
f
All supply end connection leads, with the exception of the power supply, may not exceed a length
of 3 m. The maximum allowable length of the motor connection cable depends on the encoder
type used.
Recommended values for the length of the motor connection cable
Encoder type Length, unshielded
Length, shielded
Analog Hall
0.3 m
2.0 m
IE2 / IE3
0.5 m
On request
IE3L
several metres; speed and resolution-dependent
On request
AES
0.3 m
On request
NOTE
The usability of a longer motor connection cable must be checked for each individual case.
Optimisation of performance with respect to emission and immunity requires the additional EMC
measures:
Ensuring allowable emissions or necessary immunity in industrial environments may require the
use of an EMC filter and / or a shield or an EMC suppressor circuit.
Suppressor circuit MCxx 3002
GND
U
B
Int. Supply
MCxx
Motor
D1
L1
To protect against conducted emissions, it is advisable to plug in the supply line near the Controller
with two windings via a ferrite sleeve L1 (e.g. WE 742 700 790).
The capacity of the internal suppressor diode is not sufficient to protect against overvoltage on the
supply line (surge). An external diode D1, e.g. NTE 4934 (1500 W) is recommended for this.