Battery power supply, Connecting the control and backup supply (24 v) – ElmoMC SimplIQ Digital Servo Drives-Trombone DC User Manual
Page 33
DC Trombone Installation Guide
Installation
MAN-DCTROIG (Ver. 1.601)
33
3.6.6.
Battery Power Supply
Figure 10: 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.
3.6.7.
Connecting the Control and Backup Supply (24 V
)
In non-S type DC Trombone drive (a drive without having the option S in its part number), a
“smart” control-supply algorithm enables the DC Trombone to operate with the main power
supply only, with no need for an auxiliary supply voltage for supplying the drive's logic section.
Note:
In models without the S option, there is no backup ability at all.
If backup functionality is required, to store control parameters in the event of main power
outages, then the S type DC Trombone should be used, with an external 24 VDC isolated power
supply connected to it.
Note:
The S-model DC Trombone always requires an external 24 VDC power supply,
regardless of whether or not backup functionality is required.
Connect the auxiliary 24 VDC power supply as described below.
Notes for 24 VDC backup supply connections:
1.
Use a 24 AWG twisted pair shielded cable. The shield should have copper braid.
2.
The source of the 24 VDC backup supply must be isolated, by using an isolation
transformer.
3.
For safety and EMI reasons, connect the return of the 24 VDC backup supply, to the closest
ground (PE).
4.
Connect the cable shield to the closest ground (PE) near the power source.
5.
Before applying power, first verify the correct polarity of the connection.