Battery supply, Connecting the control and backup supply (24 v) – ElmoMC SimplIQ Digital Servo Drives-Drum HV User Manual
Page 33
Drum HV (High Voltage) Installation Guide
Installation
MAN-DRU-HVIG (Ver. 1.602)
33
3.5.3.4.
Battery Supply
Figure 8: 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 Drum HV (High Voltage) drive (a drive without having the suffix S in its part
number), a “smart” control-supply algorithm enables the Drum HV (High Voltage) 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 Drum HV (High Voltage) should be used, with an external 24 VDC
isolated supply connected to it.
Note that the S type Drum HV (High Voltage) 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.