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UF20 Buffer Unit Instruction Manual
Physical Dimensions, Indicators and Cooling
Width
64mm / 2.51''
Height
124mm / 4.88''
Depth
102mm / 4.02''
Weight
740g / 1.63lb
DIN-Rail
Use DIN-rails according to EN 60715 or EN 50022
with a height of 7.5 or 15mm
Recommended mounting orientation is to put the power terminals on the top
and the signal terminals on the bottom.
Signal Connector
General wiring diagram
- -
+ +
Adj
-
+
DCok
Load
Overload
UF20
Power
Buffer Unit
Supply
L N PE
L
N
optional
PE
Signal schematic and signal specification:
6 +
7 Active
8 Ready
5,1V
3mA
9 Inhibit
UF20
EMC
The device is suitable for applications in industrial environment as well as in residential,
commercial and light industry environment without any restrictions.
For further details see datasheet.
This device complies with FCC Part 15 rules. Operation is subjected to following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
CE mark in conformance with EMC guideline 89/336/EEC and 93/68/EEC and low-voltage directive (LVD) 73/23/EWG.
PU-366.010.00-10A
plus DIN-rail depth
- -
+ +
Status
Back-up
Threshold
UF20.241
Active signal (7)
low ohmic during buffering
Ready signal (8)
low ohmic when buffer is fully charged
Signal voltage
max
35Vdc
Signal current
max
10mA
Voltage drop
typ
0.9V / 3V
Leakage current
max
50µA
Isolation
nom
500Vac
Inhibit input (9)
"High" input signal initiates unit shutdown and buffer discharge
max
Signal voltage
35Vdc
Signal current
max
4mA
Threshold
min/max
6V / 10V
Isolation
nom
500Vac
Front side
I/O Power Port
Quick-connect spring-clamp
terminals, no tools required
+ Positive terminal
-
Negative terminal
Chassis Ground
to bond the housing
Status lamp
OFF:
Buffer is discharged, or
terminal voltage is below
22V (UF20.241) or below
44V (UF20.481)
ON:
Unit is ready for operation,
buffer is fully charged
Flashes 1,25Hz:
Unit is in charging mode
Flashes 10Hz:
Unit is in discharging mode
Signal Port
Plug Connector
6 common + pole
7 Active: unit is buffering
8 Ready: unit is on stand-by
9 Inhibit: initiates buffer
discharging and inhibits
recharging of capacitors
Operating Diagram
V
Mains
V
Buffer
Capacitor
V
out
Optocoupler high ohmic
Ready
Optocoupler high ohmic
Active
1.25Hz
LED
Charging Mode
UF20.481
60Vdc
6mA
1.2V / 3.3V
across opto- coupler at 1mA / 5mA
50µA
high ohmic opto-coupler
500Vac
Signal port to power port
60Vdc
4mA
current limited
6V / 10V
Unit is off above this threshold level
500Vac
Signal port to power port
EMC Immunity
EMC Emission
Back-up threshold jumper
1-2: Fixed mode, (factory setting)
Unit switches to buffer mode as soon
as the voltage falls below 22.5V
(UF20.241) or 45V (UF20.481)
2-3: Variable mode
Unit switches to buffer mode when
input voltage decreases by 1V
within 0.54V/s (UF20.241) or by 2V
within 1.1V/s (UF20.481) or when
the input voltage falls below 22.5V
(rsp. 45V).
Missing jumper = 22.5V (45V) fixed
Set the unit to fixed mode:
- when power supplies other than
the Dimension Q-Series are used
- with back-feeding loads
- when the buffer unit is placed
close to the load
- whenever in doubt
Set the unit to variable mode:
- for 28 or 48V applications
- when the buffer unit is placed
close to the power supply
Hold-up Time Power Supply
Optocoupler
low ohmic
Optocoupler low ohmic
10Hz
Standby
Buffer Mode
Mode
Signals supplied from an external voltage
- -
+ +
Status
Back-up
UF20
Threshold
Buffer Unit
EN 61000-6-1, EN 61000-6-2
EN 61000-6-3, EN 61000-6-4, FCC Part 15 Class B
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