The UMD-PSU22 is a 19” 2RU unit which provides 240 Watts of
power, mnemonic and serial tally distribution for typically up to a maximum of
96 S8C / D8C displays.
The unit may be ordered or upgraded with a second 240 Watt
PSU which will provide 100% redundancy in the event of an internal power supply
module unit failure. This upgrade is a straightforward plug in upgrade. The
frame is fully wired to accept a second PSU.
Single PSU units have the PSU (PSU1) fitted to the LH frame
and the top IEC is the power inlet connector.
This unit can provide a maximum of 96 PLU (power loading
units) where one PLU is equivalent to 2.5 Watts. Note that a maximum of 240
Watts only may be drawn from the PSU-22.
In the standard, non dual-redundant unit, power (at +24V) is
provided by one auto-ranging PSU (88 ~ 264V, 47/63 Hz) via a diode bridge
arrangement output (to isolate the second optional PSU module) and re-settable
internal fuse to the rear distribution board.
Each of the 48 RJ45 o/p connectors is rated at a maximum of
1.1Amps* ( the re-settable fuse opens at about 1.5A after approx. 90 secs).