Yamaha RCX40 User Manual page 54

12. Precautions for cable routing and installation
3
20
3-
2) Always attach a surge absorber to the coil of inductive loads (inductive motor, sole-
noid valve, brake solenoid and relay) located near the robot controller.
Example of surge absorber
For inductive motor
A
A: Surge killer (Okaya Electric Industries CRE-50500, 3CRE-50500 or equivalent)
For solenoid valve, solenoid
B
DC type
B: Diode, varistor, CR elements
Single-phase
motor
C: Varistor, CR elements
3-phase
motor
A
C
AC type