Overview

PS9031-4820-0001 | Buffer module 48 V, 20 A, 100 ms

Overview 1:

• Buffering with electrolytic capacitors

• Buffering of 48 V loads

• Minimum hold-up time 0.1 s at 20 A, 0.2 s at 10 A and longer hold-up time with smaller loads

• Clear status display by Status LED and signaling terminals

• Quick-connect terminals with spring-loaded terminals

The 9031-4820-0001 Buffer Module is an additional device for regulated DC 48 V power supply units that can be used for various purposes:

Bridging of failures of the DC supply network with additional power
Extension of the hold-up time after failure of the AC voltage.
Short-term provision of an additional peak current that is higher than the nominal current of the power supply unit.

The buffer module uses maintenance-free electrolytic capacitors to store energy. This enables use even at ambient temperatures up to +70 °C.

The device requires no control wiring. It can be connected anywhere in parallel with the load circuit.

Buffer modules can be connected in parallel in order to increase the output current capacity or the hold-up time

Overview of technical data	PS9031-4820-0001
Supply voltage	DC 48 V, -20%/+25% (38.4 – 60 Vdc)
Required voltage for charging the capacitors	46 Vdc
Threshold voltage for buffer operation	45 V / V_IN- 1 V (adjustable)
Buffer voltage	45 V / V_IN- 1 V (adjustable)
Buffer current	20A
Charging duration	Typ. 21 s
Current consumption	Typically 40 mA (standby mode)
Current consumption	Max. 500 mA (when charging)
Power loss	1.9 W (standby mode)
Buffer time	Min. 100 ms (at 45 V, 20 A)
	Min. 200 ms (at 45 V, 10 A)
	Typically 150 ms (at 45 V, 20 A)
	Typically 300 ms (at 45 V, 10 A)
	Typically 21 s (at 45 V, 0.1 A)
Temperature range	-25 °C in +70 °C (in operation)
Dimensions (W x H x D)	64 x 124 x 102 mm
Weight	740 g
Markings/approvals	CE, cULus

*) All values typical for 48 V, 20 A, +25 °C ambient temperature and after a warm-up time of five minutes, unless specified otherwise