The HPE Procurve Switch GL/XL Redundant Power Supply (J4839A) is a redundant power supply that you can add to an HPE Procurve Switch 4108GL to provide additional switch reliability.
220 V only. Installation of the J8713A reduces the chassis altitude specification to 10,000 ft (3677 m). J8713A supplies 600 W chassis power and 900 W PoE power.
Standard PoE+ power supply for zl series switches. Supplies 300W for PoE+ power at 110-127 volts, 900W for PoE+ power at 200-240 volts, and 600 W for switch power.