Installation Manual 44 Document #: LTRT-94704
Mediant 3000 & IPmedia 3000
2.9.2.2 DC Power Supply Modules
The PS/DC/3K Power Supply (PS) module is an advanced-design, multi-output switching
power supply, which can be provided in DC primary input power configurations. The PS
modules are located on the front panel and connect to the PEM modules (located on the
rear panel), through the chassis' backplane.
Power for the device is typically supplied from redundant DC power feeds, whose input
voltage ranges from -40 to -60 VDC nominal -48 to -60 VDC mains. The PS modules
function in an output current, load-sharing configuration to provide necessary voltages and
fail-safe operation to the blades in the chassis.
Table 2-24: PS/DC/3K Technical Specifications
Function Specification
Output
Output Power
300 watts maximum, continuous
Outputs (V1-V4)
+3.3 V at 40 A; +5 V at 40 A; +12 V at 5.5 A; -12 V at 1.5A
Controls &
Signaling
TTL
General Characteristics
Efficiency
75% at full load
Safety Standards
EN 60950-1, UL 6050-1
DC Input
PEM/DC
Power Entry Module for DC
Input
-40.5 to -72 VDC
Figure 2-23: PS/DC/3K Power Supply Module
The PS provides LEDs on its front panel, as described in the table below.
Table 2-25: PS LEDs Description
LED Color Status Description
POWER Green
On Power is supplied to the blade.
--
Off No power is supplied to the blade.
FAULT Red
On Power supply failure.
--
Off Normal operation.
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