YASKAWA YASNAC J50 Connecting Manual page 92

17.3.3 POWER SUPPLY FOR 1/0 SIGNALS
(1) Internal power Sunpply
Internal power supply +24 V for 1/0 signals should be provided
by the machine tool builder. If internal power supply is used,
calculate the load current according to 1/0 points and confirm
that the current is within the allowable current value since there
is a current capacity limit according to 1/0 ON points.
The allowable current capacity of the internal power supply is 1.5A.
Unit consumed current (When internal power supply is used) :0.1
A
Panel 1/0 JANCD-SP50- 1, SP50-2 consumed current (When
internal power is used)
Input current (l-point) :5.1 mA (at ON)
Output current (1-point) :60 mA max
(differs from load.)
General-purpose 1/0 signal 1/0 module JANCD-FC8 10, FC860,
FC861 consumed current
Input current (l-point)
:10.2 mA (at ON)
Output current (l-point) :60 mA max
(differs from load.)
(Example of Calculation)
When JANCD-SP50-1 All 1/0 output are ON with LED load
(2.7kQ):
5.1 mAx64=326.4 mA (JANCD-SP50- 1 imput comsumed
current)
24 V/2.7 kx32=28.4 mA (JANCD-SP50- 1 output comsumed
current)
1500 mA-326 mA-284 mA-100 mA=790 mA (possible supply
current)
If the internal power supply is connectedtoJANCD-FC810 under
these conditions, overcurrent alarm of the internal power supply
(CPS18F) occurs to the input ON of 77 points or above.
790 mA/10.2 mA=77 points
(2) Specifications of External Power Supply
Voltage
:24 VDC t5%
Ripple :1070 (P-P)
Provide external supply with the above.