Rockwell Automation 1606-XLE960MX-3N Power Supply Reference Manual - Manual (Page 16)

All parameters are specified at 48V, 20A, 3x480Vac, 25°C ambient and after a 5 minutes run-in time, unless noted otherwise.
16 Rockwell Automation Publication 1606-RM025A-EN-P — April 2014
Bulletin 1606 Switched Mode Power Supplies
23. Accessories
Buffer Module 1606-XLSBUFFER48
This buffer unit is a supplementary device for DC48V power supplies. It delivers power to bridge typical mains failures
or extends the hold-up time after turn-off of the AC power. At times when the power supply provides sufficient
voltages, the buffer unit stores energy in integrated electrolytic capacitors. In case of mains voltage fault, this energy
is released again in a regulated process.
Fig. 23-1 Buffer module 1606-XLSBUFFER48
Fig. 23-2 Wiring diagram: 1606-XLE and
1606-XLSBUFFER24
The buffer unit does not require any
control wiring. It can be added in parallel
to the load circuit at any given point.
Buffer units can be added in parallel to
increase the output ampacity or the hold-
up time.
Do not use the buffer module to bridge mains interruptions which are longer than typ. 350ms. Once the mains is off
for longer than typ. 350ms, the power supply needs an additional 1s to restart.
24. Comparison between the 1606-XLE960MX-3N, a Transformer and
a Traditional Switched-mode Power Supply
1606-XLE960MX-3N
semi-regulated
power supply
Traditional
switched-mode
power supply
Transformer
power supply
Input voltage range + ++ -
Inrush current surge ++ + -
Hold-up time - + -
Phase-loss operation - + -
Efficiency +++ ++ -
Output voltage regulation + ++ -
Output adjustment range - ++ -
Ripple & noise voltage - ++ -
Error diagnostics ++ ++ -
Harmonic distortion (PFC) + + -
EMC ++ ++ +
Ease of installation ++ ++ -
Size +++ ++ -
Weight +++ + -
+ + + …very, very good ++…very good +…good -…poor
DC
Buffer
Unit(s)
Power
Supply
Load AC
+
-