Alcatel OS6855-24 User Guide - Page 68

DC Power Supply Considerations OmniSwitch 6855 Series Chassis and Hardware Components 4 Tighten the clamp by tightening the screw above the slot into which you inserted the wire lead. The wire lead should be securely attached inside the connector. You should be able to pull on the wire and not dislodge it. Warning. For both 24V and -48V input voltages, the positive (+) wire of the sourcing equipment, such as a battery or rectifier, must be connected to the positive (+) terminal of the OmniSwitch DC power supply and the negative (-) wire of the sourcing equipment must be connected to the negative (-) terminal of the OmniSwitch DC power supply. This rule always applies to both 24V, and -48V input voltages, regardless of the polarity signs shown on the power supply specification labels such as: -48V, +24V, or -24V." 5 Repeat Steps 2 through 4 for the remaining positive and negative wire leads. OS6855 Power Supply DC Power Source Correct Polarity Connections Chassis Grounding The rear of the chassis has two ground holes. To properly ground the equipment, connect a Panduit Corporation UL listed Lug, (Part number LCD8-10A-L) to the two threaded holes located at the rear, insert two 10-32, 3/8" threaded pan head screws into these ground holes, and connect them to a proper earth ground point, using protective earthing conductor wires and conductors. page 2-46 OmniSwitch 6855 Series Hardware Users Guide September 2011