phytron
15
MA 1317-A001 EN
8 Cabling Design Requirements
Which devices?
SLS-C
power supply units with
built-in power stages type
MSX
+
and
ZMX
+
.
Which cables?
Mains, I/O, logic control and motor cables
What is to be
observed?
The secondary motor circuits (motor current circuit, I/O and logic
circuit) are not insulated by means of a protective separation as
defined by the EN 50178 European Standard.
Therefore the connecting cables to all secondary circuits (I/O cables,
logic control cables and motor cables) should have a basic insulation
appropriate to the maximum voltage which might be met during
normal operation.
Depending on the special requirements of the application and the
insulation concept for the complete machine, it might be necessary to
apply a reinforced or double insulation for this voltage. In some cases
it could be necessary to mount a protective earth connection at
adjoining metal parts which might be accessible for persons.
The cable insulation design voltage should be at least as given in the
following table:
Power stage with
nominal voltage
up to 70 V
DC
from 70 to 90 V
DC
from 90 to 140 V
DC
Rated voltage
120 V
160 V
200 V
Motor cable
Lead cross
section
Dependent on the maximum motor current and the motor cable length it is
essential:
0.1 mm
2
pro 1 Ampere motor current 0.2 mm
2
per 1 Ampere motor
current
Cable length
up to 25 m
from 25 to 50 m
Mains cable
Lead cross section
1.5 mm
2
Cable length
up to 2 m
Control pulse and
I/O cable
Lead cross section
0.14 mm
2
Cable length
We recommend using a shielded cable, as short as possible (< 1 m).
