Battery supply, Connecting the control and backup supply (24 v) – ElmoMC ExtrIQ Digital Servo Drives-Eagle HV User Manual
Page 34
Eagle HV Installation Guide
Installation
MAN-EAG-HVIG (Ver. 1.502)
34
3.5.3.4.
Battery Supply
Figure 9: Battery Connection Topology
Caution:
When using batteries, it is recommended to connect the negative pole to the
PE.
When doing so, the charger of the battery
must
be isolated from the mains by
an isolation transformer.
3.5.4.
Connecting the Control and Backup Supply (24 V)
In a non-S type Eagle HV drive (a drive without having the suffix S in its part number), a “smart”
control-supply algorithm enables the Eagle HV to operate with the main power supply only,
with no need for an auxiliary supply voltage for supplying the drive's logic section.
Note that in such model - there is no backup ability at all.
If backup functionality is required to store control parameters in the event of a mains power
outage, then an S-model Eagle HV should be used, with an external 24 VDC isolated supply
connected to it.
Note that the S type Eagle HV always requires an external 24 VDC power supply, regardless if
backup functionality in required or not.
Connect the Aux. 24 VDC power supply as described below.
Notes for 24 VDC backup supply connections:
•
Use a 24 AWG twisted pair shielded cable. The shield should have copper braid.
•
The source of the 24 VDC backup supply must be isolated, by using an isolation
transformer.
•
For safety and EMI reasons, connect the return of the 24 VDC backup supply, to the closest
ground (PE).
•
Connect the cable shield to the closest ground (PE) near the power source.
•
Before applying power, first verify the correct polarity of the connection.