
4. POWER SUPPLY CONNECTION
B–63523EN/03
62
Example 2
AC input
Regulated
power
supply
CNC unit
Device with
large rush
current
For a circuit configuration in 2, connect another regulated power supply
to be specifically used for the device with remarkable load fluctuations
so that the CNC and other units are not affected.
If you find instructions to ”turn the power on simultaneously when or
before turning the power to the CNC on” for a unit such as a 24 VDC
power supply, turn the power to the unit simultaneously when turning on
the power to the CNC on from now on. To turn the power to such a unit
simultaneously when turning the power to the CNC on, connecting the
unit on the same line as for the CNC as shown in Fig. 4.2.2 (b) is
recommended. (For a separate detector (scale), see Subsection 4.2.3,
”Power–on Sequence,” however.)
Turning the power to units on simultaneously when turning the power to
the CNC:
When the following power–on timing condition is satisfied, the power to
units is assumed to be turned on simultaneously when the power to the
CNC is turned on.
Power to the CNC
On
Power to units
(including the
Power Mate)
t1
t2
Off
On
Off
t1 : 200 ms Means that the power to units (including the Power
Mate) is turned on within 200 ms before the power to
the CNC is turned on.
t2 : 500 ms Means that the power to units (including the Power
Mate) is turned on within 500 ms after the power to the
CNC is turned on.
For instructions to ”turn the power off simultaneously when or after
turning the power to the CNC off” for a unit such as a 24 VDC power
supply, the power–off sequence is not changed unlike the above
power–on sequence. (Turning the power off simultaneously when
turning the power to the CNC on means that the power may be turned off
within 500 ms before the power to the CNC is turned off.)
Recommended