
4. POWER SUPPLY CONNECTION
B–63523EN/03
60
Specifications of recommended external 24 VDC power supply
(regulated power supply): (The power supply must satisfy UL1950.)
Output voltage: +24 V (10% (21.6 V to 26.4 V)
(including ripple voltage and noise. See the figure
below.)
Output current: The continuous load current must be larger than the
current consumption of the CNC.
(At the maximum temperature inside the power
magnetics cabinet in which the power supply is
located)
Load fluctuations (including rush current):
The output voltage must not go out of the above range
due to load fluctuations by external DO and other
factors.
Instantaneous input interruption retention time: 10 mS (for –100%)
20 mS (for –50%)
AC input voltage
Instantaneous
interruption
(–100%)
Instantaneous
interruption
(–50%)
Output voltage
Abrupt
load
change
Output current
Fig. Example of ripple voltage and noise due to switching power supply
Noise
Noise
Ripple
voltage
0A
21.6V
26.4V
10mS 20mS
Fig 4.2.2 (a) Timing chart
4.2.2
+24V Input Power
Specifications