Datasheet

UF20.481
UF-Series
48V, 20A, 100MS, BUFFER MODULE
9. ACTIVE SIGNAL
The signal “Active” (pin 7) is an opto-coupler output which is low ohmic while buffer capacitors are discharged.
Wiring scheme see Fig. 8-2, Fig. 25-1 and Fig. 25-2.
Signal voltage Max. 60Vdc
Voltage between pin 6 and 7
Signal current Max. 6mA
Voltage drop across opto-coupler 1.2V / 3.3V At 1mA / 5mA while opto-coupler is low ohmic
Leakage current Max. 50μA While opto-coupler is high ohmic
Isolation voltage See chapter 21.
10. READY SIGNAL
The signal “Ready” (pin 8) is an opto-coupler output which is low ohmic when buffer capacitors are fully charged.
Wiring scheme see Fig. 8-2, Fig. 25-1 and Fig. 25-2.
Signal voltage Max. 60Vdc Voltage between pin 6 and 7
Signal current Max. 6mA
Voltage drop across opto-coupler 1.2V / 3.3V At 1mA / 5mA while opto-coupler is low ohmic
Leakage current Max. 50μA While opto-coupler is high ohmic
Isolation voltage See chapter 21.
11. INHIBIT INPUT
Buffering can be disabled or interrupted with the inhibit input (pin 9). Therefore, pin 6 should be connected to the
positive pole of the terminal voltage or to the external control voltage and pin 9 must be connected to the
corresponding negative pole.
Inhibiting the unit also discharges the internal capacitors. Charging of the capacitor is not possible when the buffer
module is in inhibit mode.
Wiring scheme see Fig. 8-2, Fig. 25-1 and Fig. 25-2.
Signal voltage Max.
60Vdc (between pin 6 and pin 9)
Signal current Max. 4mA, current limited
Inhibit mode
The unit does not buffer (or stops buffering) if the voltage between pin 6 and pin 9 is
higher than 10V. Below 6V buffering will function again.
See chapter 21. Isolation voltage
Oct. 2016 / Rev. 2.0 DS-UF20.481-EN
All parameters are specified at 48V, 20A, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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