DC Power Supply Considerations
OmniSwitch 6855 Series Chassis and Hardware Components
page 2-46
OmniSwitch 6855 Series Hardware Users Guide
September 2011
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.
Correct Polarity Connections
Chassis Grounding
The rear of the chassis has two ground holes. To properly ground the equipment, connect a Panduit Corpo-
ration 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.
DC Power Source
OS6855 Power Supply
