GarrettCom 8000X User Manual
Page 62
Magnum 8000X Mixed-Media Fiber Hubs Installation and User Guide (05/ 02)
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Figure C5.0: -48V DC Dual-Source, wiring connections to the External
Terminal Block on a Magnum 8000X 48VDC with Dual-Source option
Note: The GND should be hooked up first. The 8000X unit has a floating
ground, so the user may elect to Ground either + or = terminal to suit the customer’s
use.
Before connecting to Terminal Block of –48VDC, 24VDC or 125VDC,
always use a digital voltmeter to measure the output voltage of the power supply and
determine the lead which is more “+ve potential”. The more “+ve” voltage lead from
48V or –48V supply must be connected to the post labeled “+”.
The connection procedure is straightforward. Simply connect the DC leads to
the hub’s power terminals, positive (+) and negative (-) screws. The use of Ground
(GND) is optional; it connects to the hub chassis. Ensure that each lead is securely
tightened.
The 24VDC & 125VDC terminal block on Magnum 8000X is similar to that
described in the –48VDC info above.
C5.1 UL Requirements
The following must be adhered to in order to conform to UL requirements:
1. Minimum 14 AWG cable for connection to a Centralized DC power source.
2. Fastening torque of the lugs on the terminal block: 9 inch pound max.
3. Centralized DC Power Source cable securement, use at least four cable ties
to secure the cable to the rack at least 4 inches apart with the first one
located within 6 inches of the terminal block.
C6.0
ORDERING INFORMATION
To order the optional Dual-Source -48VDC power supply factory installed,
order “Dual-Src-48V” as a separate line item following the product model.
Example: Magnum 8000X-48VDC
Dual-Src48V for regular model with no ON-OFF switch
or Dual-Src48V-SWITCH for model with ON-OFF switch
Similarly to order “Dual-Src 24V” or “Dual-Src 125V” as a separate line
item following the product model.
Example: Magnum 8000X-24VDC or Magnum 8000X-125VDC
Dual-Src48V for regular model with no ON-OFF switch
or Dual-Src48V-SWITCH for model with ON-OFF switch
36-70VDC
GND
A+ A- B- B+
36-70VDC