Specifications

2.2
Protecting against electric noise
2
-9
2.2 Protecting against electric noise
2.2.1 Separation of cables
There are three types of cables used in the YS 840DI system: AC Power, DC power, and sig-
nal. These types of cables must be separated from each other as follows:
• Two cables are considered to be bundled with each other if they are less than 100 mm apart.
• An electromagnetic shield is a grounded iron plate separating a type of cables from another.
Type Cable Separation requirements
AC power (1) AC power supply lines
(primary/secondary)
These cables must not be bundled with DC power
cables (2) or signal cables (3), or must be provided
with an electromagnetic shield.
Solenoids and relays must be provided with a surge
absorber or a diode.
Power cables to spindle and servo
motors
AC lines to solenoids, contactors, and
relays
DC power (2) 24 VDC power supply lines to CNC,
I/O, and power supply modules
These cables must not be bundled with AC power
cables (1), or must be provided with an electro-
magnetic shield.
These cables must be separated far enough from
signal cables (3). DC solenoids and DC relays
must be provided with a diode.
24 VDC I/O lines between I/O and
machine
24 VDC lines to solenoids and relays
Signal (3) PROFIBUS-DP cables between CNC
and I/O module and between I/O
module and converter
These cables must not be bundled with AC power
cables (1), or must be provided with an electro-
magnetic shield.
These cables must be separated far enough from
DC power cables (2). Cables that need to be
shielded must always be shielded.
RS232C cables
Cables to manual pulse generator
Encoder cables between spindle
inverter and spindle motor
Encoder cables between servo unit
and servo motor
Cables to separately mounted PG
Battery cables
Other cables that need to be shielded
INFO