Operation - Motorola GX2-PSDC10D-R Installation And Operation Manual

3-2 Installation and Operation
Figure 3-2
DC input connector
Safety agency conditions of acceptability require fusing of the DC supply wiring. The -48 VDC
supply connection must include a 15A, 250V, UL listed fuse (Cooper Bussman MDA-15 or
equivalent).
Before removing a power supply from the GX2-HSG*, disconnect the power source from the rear
of the GX2-PS*10*. If a GX2-PS*10* is removed before power is disrupted, you must wait
approximately five minutes before restoring power or the unit may not start properly.
In normal operation, it is not necessary to remove power from the equipment shelf when
installing a new module or replacing one. The shelf and all modules are designed to enable
module replacement with power applied.

Operation

The DC input voltage, which must be between -36 V and -75 V, is filtered and applied to a boost
converter. The high DC voltage from the boost converter is applied to DC/DC converters. The
converters, one for each of the three output voltages, supply precisely regulated output voltages
of +5.1, +12, and +3.7 VDC respectively. Short circuit protection is provided by each of the
DC/DC converters to limit the output current until the fault is cleared.
Figure 3-3 illustrates a block diagram of the GX2-PSDC10D-R:
Figure 3-3
GX2-PSDC10D-R block diagram
GX2-PSDC10D-R Installation and Operation Manual