Rockwell Automation 1606-XLSBUFFER48 Power Supply Reference Manual - Manual (Page 2)

All parameters are specified at 24V, 20A, 25°C ambient and after a 5 minutes run-in time, unless noted otherwise.
2 Rockwell Automation Publication 1606-RM027A-EN-P — April 2014
Bulletin 1606 Switched Mode Power Supplies
Buffer Unit
■ Buffering with electrolytic capacitors instead
of lead batteries
■ Buffering of 48V loads
■ Minimum hold-up time 0.1s at 20A and 0.2s at 10A
■ Longer hold-up time at lower loads
■ Clear status indication by status LED and signaling
terminals
■ Quick-connect spring-clamp terminals
■ 3 year warranty
1. Description 2. Specification Quick Reference
Rated voltage DC 48V
Voltage range 48-56V
Output voltage 45V or
V
IN
–2V
Buffer mode
select with jumper
Output current 0 to 20A
Hold-up time min 0.1s 45V, 20A
typ 0.15s 45V, 20A
min 13.4s 45V, 0.1A
typ 21s 45V, 0.1A
Charging current max 500mA
Charging time typ 21s
Input current typ 40mA standby mode
Power dissipation typ 1.9W standby mode
Temperature range -25°C to +70°C operational
Dimensions 64x124x102mm WxHxD
The buffer unit is a supplementary device for regulated
DC48V power supplies. It buffers load currents during
typical mains faults and load peaks.
Working principle
In 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.
Bridges mains faults
without interruption
Statistic show that 80% of
all mains fault lasts less
than 0.2s. These mains
faults are completely bridged by the buffer unit. This
increases the reliability of the system as a whole.
Extended hold-up time
Once mains power fails or
is switched off, the buffer
unit will continue to
provide the load current
for a defined period of time. Process data can be saved and
processes can be terminated before the DC power switches
off. Controlled restarts are subsequently possible.
Easy to handle, expandable and maintanance-free
The buffer unit does not require
any control wiring. It can be
added parallel to the load circuit
at any given point. Buffer units
can be switched in parallel to
increase the output ampacity or the hold-up time.
DC
Charge
Discharge
Buffer
AC
DC
Buffer Unit
AC
DC
Buffer Unit
DC
Buffer
Unit(s)
Power
Supply
Load AC
+
-
3. Catalog Numbers 4. Certification Marks
Buffer Unit 1606-XLSBUFFER48 48V, 20A, 200ms
Accessory 1606-XLB Wall mounting
bracket
UL 508
UL 60950-1 EMC, LVD
C-Tick GOST R