Buffer Mode - MICRO-EPSILON thicknessCONTROL RTP 8301.EO Betriebsanleitung

U–Series
7. O B
UTPUT IN UFFER
If the input voltage falls below a certain value (transfer threshold level), the DC-UPS starts buffering without any
interruption or voltage dips. Buffering is possible even if the battery is not fully charged.
Output voltage in buffer mode
Transfer threshold for buffering
Ripple and noise voltage
Output current
Short-circuit current
*) If the output current is in the range between 10A and 15A for longer than 5s, a hardware controlled reduction of the
maximal output current to 10A occurs. If the 10A are not sufficient to maintain the 24V, buffering stops after another 5s. The
buffering is possible again as soon as the input voltage recovers.
**) If the nominal output voltage cannot be maintained in buffer mode, the DC-UPS switches off after 5s to save battery
capacity.
Fig. 7-1 Buffering transition, definitions
Input 28V
24V
voltage
Output
voltage

Buffer mode

Fig. 7-3 Available output current in buffer
mode
Output
Current
15A
10A
5A
0
0 5 Sec.
May. 2008 / Rev. 1.1 DS-UBC10.241-EN
All parameters are specified at an input voltage of 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time
unless otherwise noted. It is assumed that the input power source can deliver a sufficient output current.
M
ODE
nom. DC 24V
22.45V
22.25V
typ. 80mV higher than the output voltage in buffer mode
max. 20mVpp
nom. 10A
15A
min. 17.9A
max. 21A
Transfer
threshold
t
t
®
BonusPower
Time
www.pulspower.com Phone +49 89 9278 0
UBC10.241, UBC10.241-N1
Output voltage is stabilized and independent from
battery voltage
±1%, at no load,
±1%, at 10A output current
20Hz to 20MHz, 50Ohm
Continuously allowed
< 5s with full output voltage *)
Load impedance 100mOhm **)
Load impedance 100mOhm **)
Fig. 7-2 Transfer behavior, typ.
Fig. 7-4 Output voltage vs. output current in
buffer mode, typ.
Output Voltage
25V
A
20
15
D
10
5
0
5 10
0
Continuously available
A
Available for 5s then auto switching to curve
B
Buffering will stop after 5s
C
Buffering will stop after 5s
D
Germany
24V, 10A, DC-UPS
B
C
Output
Current
15 20 25A
D
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