YASKAWA GA80U4720ABM, Manual

Page: 265 / 1016

Standards
Compliance
5
5.6 Safe Disable Input
YASKAWA SIEPC71061737B GA800 Drive Technical Reference 265
Figure 5.19 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
*1
3
No 15
No
Yes
*1
7
No 19
External power supply -
Different for different external power supply
capacities
*2
*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.