Data Sheet

UB20.241
UB-Series
24V, 20A, DC-UPS
12. FUNCTIONAL DIAGRAM
Fig. 12-1 Functional diagram
-
+
DC- UPS
24V
Power
Supply
Buck/Boost
Converter
Battery
Charger
1
Battery
Diagnosis
1
+
-
24V
Battery
+
-
Input
Batt
+-
BAT2
12V
+-
BAT1
12V
CT
Battery
Charger
2
Current
Limiter
Battery
Diagnosis
2
(13)
-
Current
Measure-
ment
+
-
Buffered
Load
Output
Diagnosis LED (yellow)
Status LED Batt 2 (green)
Inhibit +
Controller
Error LED (red)
Replace Battery
Buffering
Contact
Ready Contact
Buffer Time Limiter
10s, 30s, 1m, 3m, 10m,
(7)
Inhibit -
(8)
(1)
(2)
(3)
(4)
(5)
(6)
Status LED Batt 1 (green)
Buffer Voltage
22.5V, 24V, 25V, 26V
Temp. Sensor (11)
Center
Tap
Back
Feeding
Protection
Battery Size Selector
<10Ah / > 10Ah
Temp. Sensor (12)
Batt
13. TERMINALS AND WIRING
The terminals are IP20 finger safe constructed and suitable for field and factory wiring.
Input and output Signals
Type
screw terminals pluggable screw terminals
Solid wire 0.5-6mm
2
0.2-1.5mm
2
Stranded wire 0.5-4mm
2
0.2-1.5mm
2
American Wire Gauge AWG 20-10 AWG 22-14
Max. wire diameter 2.8mm (including ferrules) 1.5mm (including ferrules)
Wire stripping length 7mm / 0.28inch 6mm / 0.25inch
Tightening torque 1Nm / 9lb.inch 0.4Nm / 3.5lb.inch
Screwdriver 3.5mm slotted or cross-head No 2 3mm slotted
Instructions:
a) Use appropriate copper cables that are designed for minimum operating temperatures of:
60°C for ambient up to 45°C and
75°C for ambient up to 60°C and
90°C for ambient up to 70°C minimum.
b) Follow national installation codes and installation regulations!
c) Ensure that all strands of a stranded wire enter the terminal connection!
d) Unused terminal compartments should be securely tightened or closed.
e) Ferrules are allowed.
Feb. 2016 / Rev. 2.1 DS-UB20.241-EN
All parameters are specified at 24V, 20A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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