Data Sheet

UB20.241
UB-Series
24V, 20A, DC-UPS
7. READY AND BUFFERING RELAY CONTACT
The DC-UPS is equipped with two independent relay contacts for remote monitoring and controlling of the unit.
Ready contact
Contact is closed when both batteries are charged more than typical 85%, no wiring failure is detected, input voltage
is sufficient and inhibit signal is not active.
Contact ratings max. 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A resistive load
min. 1mA at 5Vdc min. permissible load
Isolation voltage see chapter 19.
Buffering contact
Contact is closed when unit is in battery mode.
Contact ratings max. 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A
resistive load
min. 1mA at 5Vdc min. permissible load
Isolation voltage see chapter 19.
8. REPLACE BATTERY RELAY CONTACT
The contact is closed when one of the battery quality tests of at least one battery reports a negative result.
To reset the “replace battery” signal, cycle the input power. The battery that has failed is indicated by the green LED
which is off. The battery should be replaced as soon as possible.
Contact ratings max. 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A
resistive load
min. 1mA at 5Vdc min. permissible load
Isolation voltage see chapter 19.
9. INHIBIT INPUT
The inhibit input disables buffering. In power supply mode, a static signal is required. In
battery mode, a pulse with a minimum length of 250ms is required to stop buffering. See
chapter 23.8 for details.
7 +
5.1V
3mA
Inhibit
8
-
Signal voltage max.
35Vdc
Signal current max. 6mA, current limited
Inhibit threshold min.
max.
6Vdc, buffering is disabled above this threshold level
10Vdc
see chapter 19. Isolation voltage
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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