Nidec Digitax HD M751 Base - Communications Link; Brake Operation for Multi Axis Systems; EMC Filters for Multi Axis Systems

Safety information Product information Mechanical installation Electrical installation Multi axis system design Technical data
Digitax HD M75X Series Installation and Technical Guide 91
Issue Number: 5
Table 5-6 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.
5.4 Communications link
Each multi axis kits also includes a communications link, this is a pre-wired cable assembly which provides easy connection between
communications modules.
Figure 5-8 Communications link connection
1. Communications link
5.5 Brake operation for multi axis systems
Where multiple brake resistors are required to dissipate energy on the DC bus it may be necessary to vary the brake IGBT turn on threshold via
Braking IGBT Lower Threshold (Pr 06.073) to avoid excess ripple on the DC bus. Care should be taken when reducing the threshold however to
avoid going below the maximum value of the peak rectified supply voltage as the braking resistor could take power from the supply.
For further details refer to the relevant Parameter Reference Guide.
5.6 EMC filters for multi axis systems
External EMC filters with higher input current ratings suitable for multi axis systems are detailed in Table 4-15 External EMC filter ratings on page 62.
Refer to the input current equation given in section 5.1.2 DC paralleling using a Digitax HD M75X rectifier to provide the DC supply on page 84 to size
the EMC filter.
For more information, refer to the Digitax HD M75X series EMC datasheet available from the supplier of the drive.
Model / Option / Feature Frame size
Typical input current (mA)
@ 24 V
Typical input power
Digitax HD M75X drive module
1 and 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
NOTE
1