User Manual

PSU -48 VPower Supply Unit
5.1 Power and Signal Interfaces
This section describes the power and signal interfaces, which consist of the
following:
• Power supply
• Power Control Bus (Opto)
Power
The following power connections are located on the PSU:
• Input supply
• Output power
Characteristics of these interfaces are shown in the tables below.
Table 4 Input Data
Nominal input voltage -48to-60VDC
Permi
tted variation input voltage
-39 to
-72 V DC
Nominal <16 AInput current
At U
in
= -43.5 V DC <25 A
Feeding circuit breaker or fuse 20 A (slow), 16 – 25 A
permitted
Table 5 Output data
Nominal ouput voltage 24 V DC
Factory set value +26.2 ± 0.4 V DC
Output power 700 W
Minimum load 3A
Signal
The si
gnal interface consists of an optical fibre link, called the Power Control
Bus (Opto).
8 (10)
EN/LZT 720 0281 Uen R1A