Reference Manual Owner's manual

All parameters are specified at 24V, 40A, 3x480Vac, 25°C ambient and after a 5 minutes run-in time, unless noted otherwise.
16 Rockwell Automation Publication 1606-RM024A-EN-P — April 2014
Bulletin 1606 Switched Mode Power Supplies
23. Accessories
Buer Module 1606-XLSBUFFER24
This buer unit is a supplementary device for DC24V power supplies. It delivers power to bridge typical mains failures
or extends the hold-up time after turn-o of the AC power. At times when the power supply provides sucient
voltages, the buer 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 Buer module 1606-XLSBUFFER24
Fig. 23-2
Wiring diagram:
1606-XLSBUFFER24
The buer unit does not require any
control wiring. It can be added in parallel
to the load circuit at any given point.
Buer units can be added in parallel to
increase the output ampacity or the hold-
up time.
Do not use the buer module to bridge mains interruptions which are longer than typ. 350ms. Once the mains is o
for longer than typ. 350ms, the power supply needs an additional 1s to restart.
24. Comparison between the 1606-XLE960DX-3N, a Transformer and a
Traditional Switched-mode Power Supply
1606-XLE960DX-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
- + -
Eciency
+++ ++ -
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
Buer
Unit(s)
Power
Supply
Load
AC
+
-