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Digitax HD M75X Series Installation and Technical Guide 53
Issue Number: 5
4.4 External 24 Vdc supply
An external 24 Vdc supply is required to power all the low voltage requirements within the drive.
The cable length between the 24 Vdc power supply and the drive should not exceed 10 m.
The 0V connection of the external 24 Vdc power supply should be connected to the same ground connection as the drive. Where this is not possible
the 0V connection of the 24 Vdc power supply should be floating.
The working voltage range of the drive 24 V power circuit is as follow:
Table 4-4 Working voltage range of the 24 Vdc supply
Table 4-5 24 Vdc typical input current and power requirements
During start up of the external 24 Vdc supply, allow for an additional 1 A for 300 ms.
Figure 4-6 Location of external 24 Vdc supply terminals
The 24 Vdc supply connector has been designed to allow wiring from either the left or right hand side of the drive. The same plug should be used but
attention is required to the polarity of the wiring. If it is reversed, the drive will not power up but will not be damaged.
For stand alone drives connection to either terminal is permissible.
The drive will power down and reset if the external 24 Vdc is removed.
All frame sizes
Nominal operating voltage 24.0 Vdc
Minimum continuous operating voltage 20.4 V
Maximum continuous operating voltage 28.8 V
Minimum start up voltage 20.4 V
Maximum fuse rating 30 A
Model / Option / Feature Frame size
Typical input current (mA)
@ 24 V
Typical input power
(W)
Digitax HD M75X drive module
1, 2 894 21.5
3 1039 25
SI-option module Per module 450 11
High current brake output All 1200 28.8
KI-Compact display All 10 0.24
KI-Remote LCD keypad All 73 1.75
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