Specifications

RN: 5-94
RS3: Software Release Notes for P1 R4.2
Changes to RS3 Manuals
Return Bus
Bus A
Bus B
DC Bus to DC Bus
Jumper
Bus A
Return Bus
Bus B
Bus A/B Power Supply Modules (up to 4)
+--+-- +-- +--
PS1PS2PS1PS2
System Power
Supply Unit 1
System Power
Supply Unit 2
Figure 1.2.8A. Redundant Bus/Redundant Power Supply Configuration for System Power
Supply Units
The DC bus configuration ratings in Table 1.2.3 are as close to a DC
bus-rated load as can be achieved. The values are in multiples of 43
amps; 43 amps is the rated output of a power supply module when
operating in parallel with others. Note that the maximum load that can
be planned for any one of the three configurations is 172 amps.
Table 1.2.3. DC Bus Configuration Ratings
Number of Power
Supply Modules per
DC Bus
Non-Redundant Bus
Maximum Load*
(Amps)
Redundant Bus
Maximum Load
(Amps)
Redundant Bus with Redundant
Power Supply Modules
Maximum Load (Amps)
1 N/A 43 N/A
2 43 86 43
3 86 129 86
4 129 172 129
5 172 N/A 172
* In a non-redundant bus configuration, the series connecting Bus A to Bus B results in one DC bus.
SP-1: Section 3 (Power Requirements)
Description: Additional information was added to the first paragraph on
page 1-3-5 under the heading “Grounding Separate System
Components”.