CKD MN4KB2 Series Instruction Manual page 9

ELECTRIC CIRCUITS (Section 5.4)
！
CAUTION :
PERIODIC INSPECTION (Section 6.1)
！ WARNING :
！ CAUTION :
DISASSEMBLING AND REASSEMBLING (Section 6.2)
！
WARNING :
a) Check for the presence of any current leak from the
external control device because it may cause an er-
roneous valve operation.

When a programmable controller or a similar control de-
vice is used, a current leak may prevent the normal re-
turning of the valve when the solenoid is de-energized.
b) Restriction on current leak

When controlling solenoid valves using a programmable
controller or a similar control device, make sure that the
current leak in the programmable controller output is
equal to or less than the level shown in the table below.
A current leak larger than the allowable level may cause
an erroneous valve operation.
CR circuit
C
Contact
R
Programmable
controller
Before providing a maintenance service, cut the power
and the supply of compressed air and confirm the ab-
sence of residual pressure.

The above is required to ensure safety.
Regularly perform the daily and periodic inspections to
correctly maintain product performance.

If the product is not correctly maintained, product per-
formance may deteriorate dramatically, resulting in a
shorter service life, fractures of components, and mal-
functions.
Before disassembling and reassembling solenoid valves,
read the instruction manual carefully and understand the
instructions.

A person who disassembles and reassembles a solenoid
valve system needs to have knowledge for safely per-
forming such operation based on the understanding about
the mechanisms and operating principles of solenoid
valves.

Personnel involved ｉｎ this step must have passed the
Pneumatic Pressure Skill Test Class 2 or higher.
−8−
AC100V
Leakage
AC200V
current
DC24V
Solenoid valve
3.0 mA or lower
1.5 mA or lower
1.8 mA or lower
[SM-213928-A/2]