Unit Descriptions - RF Path P/N 709C011801 Page 40
2.1.1.5 PSM (Power Supply Module)
Two types of Power Supply Modules are available:
• PSM-AC: 100 – 240 VAC;
• PSM-DC: 48 V DC; 9 A Max.
Note: The power rating for both PSM types is 300 W.
• The PSM modules are installed in HEU and in OIU chassis.
• Each HEU and OIU chassis can support two PSM modules, where the second PSM provides redundancy in case one of the
supplies fails.
• Both types of PSM modules (AC and DC) can be installed in the same chassis.
• If two modules are installed, both must be connected to their respective power source (AC or DC) and turned on at all times.
2.1.1.6 PSM-AC (Power Supply Module-AC Power Source)
The PSM-AC includes an AC power connector, on/off switch and Power Status LED. See Figure 2-7.
Figure 2-7. PSM-AC Power Supply Module
2.1.1.7 PSM-DC (Power Supply Module-DC Power Source)
The PSM-DC power source rating is 48 V DC; 9 A Max.; 300 W. The PSM-DC includes a six pin terminal block connector,
supporting up to three DC wire pairs.
Figure 2-8. DC Power Supply Module
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