6. Connections of Control Unit
6.2 Connecting with Power Supply
57
6.2 Connecting with Power Supply
Connect a general-purpose 24VDC stabilized power supply or PD25/PD27 power supply unit to the control
unit.
6.2.1 When Using General-Purpose 24VDC Stabilized Power Supply
(1) Connection of power supply
NC control unit
(Bottom view)
0V
+24V
AC
AC
FG
FG
R
S
T
NFB
MC
MC
MC
ON
OFF
24VDC Stabilized
power supply
Connector name: DCIN
Contact: 2-178288-3
Connector: 1-175218-5
Recommended manufacturer: Tyco Electronics AMP
Y
F070 cable
DCIN
DCIN
DCIN
1
2
3
24VDC
FG
0V
(Note 2)
<Related items>
Cable drawing: "Appendix 2 (F070 cable)"
Connector pin assignment: "Appendix 3 (DCIN connector)"
(Note 1)
Rush current may occur to lead welding on the contacts, when a magnetic switch such as relay
directly controls 24VDC’s ON/OFF during 24V power supply to the control unit.
Use relay with large heat capacity of contacts to control 24VDC's ON/OFF.
(Note 2)
Make a short-circuit between OV and FV on the terminal block to cut noise.
(2) Specifications of power supply
Consider the following characteristics when selecting the stabilized power supply (prepared by machine
tool builder). Use a power supply that complies with CE Marking or that follows the safety standards given
below.
[Stabilized power supply selection items]
Item
Standard
setting
Remarks
Voltage
fluctuation
±5%
±5% or less of 24VDC output
Output
Ripple noise
240mV (P-P)
Output current
--
Refer to the maximum current consumption of the unit
in use and calculate.
Output holding time
20ms
Instantaneous power failure time (AC side)
[Standards]
Safety Standards
: UL1950, CSA C22.2 No. 234 approved, IEC950 compliant
Noise Terminal Voltage
: FCC Class A, VCCI-Class A
High Harmonics Current Restrictions
: IEC61000-3-2