Mc300 With Enclosure, Connections; Signal Cables - Arlacon MC300 User Manual

ARLACON MC300
Control system
User's manual
Product code 1003418
Fig. 2.6.6.1, MC300 flush mount, power supply and earth connections

2.6.7 MC300 with enclosure, connections

Fig. 2.6.7.1 shows the recommended power supply and earth connections for MC300 control
unit with enclosure. The same cable with a sufficient number of twisted pairs can be used for
other signals such as communications signals. Use a separate earth wire with sufficient copper
diameter (2,5mm
If you use the same cable for connecting emergency signals, do not distribute emergency loop
wiring to areas with electromagnetic disturbances without taking precautions to keep them from
entering the MC300 cable.
Steel enclosure
L
N
PE
TE
Fig. 2.6.7.1, MC300 with enclosure, power supply and earth connections

2.6.8 Signal cables

To conduct signals such as communications or transducer signals use shielded cables with
preferably twisted pair wires when applicable. The shields of the wiring must be connected to
earth potential with minimum interference (generally TE or earth star point). Signals using the
shield for protecting themselves from outside interference must be connected to earth at the
control cabinet. The other end of the shield must be left unconnected to avoid loops. When
necessary, use ferrite rings on the cables to suppress common mode interference and keep it
away from the system earth.
2
or more) to ensure good earth connection for the control unit.
24Vdc power supply
+24V
McWay
communications
I/O
with RS-422
such as
WAX2
inner shields connected
to TE near equipment
sensitive
external
cable
such as encoder
outer shield connected
to enlosure wall or base plate near entry
outer shield connected
Ferrite
to enlosure wall or
base plate near entry
ring
n=4
0V
earth
bars
connect
base base
TE to PE if
plate
plate
TE not available
enclosure
enclosure
MC300MAE
MC300
D-15 metal
housing
14 +24V
6 0V
McWay
RS-422
1 enclosure
Only
power
supply and
McWay
signals shown,
use similar
shielding for
other signals
if necessary
TE ground
TE ground
bars bars
isolated
isolated
PE PE
from base plate
from base plate
23