YASKAWA
TOEPC71061782C GA800 Drive Installation & Primary Operation
77
Figure 16.4 Connection Example to Use 24 V External Power Supply
The Number of Possible Units to Connect
Power Supply
MFDI
24 V Output
Number of Drive Units
Internal power supply
(Drive 1)
Yes
(8-channel input)
Yes
3
No
15
No
Yes
7
No
19
External power supply
-
Different for different external power supply
capacities
*1
This is when you use a maximum of 150 mA.
*2
24 V, 12 mA is necessary for each drive.
Use the this formula to calculate the number of units to connect:
•
n: Number of units to connect
•
Io
max
: Maximum current that can be supplied from the power supply (234 mA for the internal power supply)
•
I
MFDI
: Current consumed per MFDI (6 mA)
•
n
MFDI
: Maximum number of MFDIs that can be activated at the same time (maximum of 8-channel)
•
I
sensor
: Current externally supplied for sensor power supply (maximum of 150 mA)
•
I
safety
: Current consumed by Safe Disable terminals H1 and H2 (12 mA)
Note:
Round the values off to the first decimal place.