Alcatel OS6850-P48 User Guide - Page 144

OmniSwitch 6850/6850E Series Power Supplies OmniSwitch 6850/6850E Series Power Supplies You can also attach the power supplies to the back of a chassis directly as well as using cables at the same time, as shown in the diagram below. 17.6 inches Redundant Large Power Supplies DC Power Supply Considerations In addition to the installation steps described in "Connecting a Power Supply Directly to the Chassis" on page 4-11 and "Connecting a Power Supply with a Cable" on page 4-12 DC power supplies (e.g., the PS120W-DC) have the following additional considerations: • Connect to a -48V or -60V reliably grounded DC SELV source. • Use common DC return connections for the DC power supplies. The DC return terminal conductor should be connected to the equipment frame. • The Branch Circuit Overcurrent Protection must be rated a Maximum of 15A. • Use 12AWG solid conductors only. • A readily accessible disconnect device that is suitably approved and rated shall be incorporated in the field wiring. Black MIN 1 TURN PER 1.5 HALF TURN PER .75 Red Twisted pair wire (red and black) for a DC power supply Note. Refer to the wiring diagram for information on connecting the DC power supply to a DC power source. page 4-16 OmniSwitch 6850/6850E Series Hardware Users Guide June 2011