Magnum Quad-Series Fiber Switches
Installation and User Guide (06/09)
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125VDC options are mainly used in power utilities, such as electrical substations,
electrical generating plants, etc. The 24VDC applications are mainly in the Industrial
environment, such as factory floor, HVAC equipment, military equipment, etc.
B4.0 INSTALLATION
This section describes the
installation of the -48VDC, 24, 100 and
125VDC power source leads to the DC
power terminal block on the Magnum
Quad-Series Switches. (see figure at the
right with –48VDC power as example).
Figure B4.1: -48VDC Terminal Block on Magnum Quad-Series Switches -48VDC
In this picture, the -48VDC terminal block on the Magnum Quad-Series Switch
is located on the rear of the unit and is equipped with three (3) screw-down lead posts. It
is similar for 24, 100 and 125VDC options on the Quad-Series Switch. The leads are
identified as negative (-), positive (+), and chassis ground (GND).
The actual connection procedure is very straightforward. Simply connect the
leads to the Magnum unit, beginning with ground. Ensure that each lead is securely
tightened.
Note: The GND should be hooked up first. The Quad-Series Switch unit has a floating
ground, so the user may elect to Ground or = terminal to suit the customer’s
use.
Before connecting hot lines to the Terminal Block of –48VDC, 24, 100 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 the DC supply must be connected to the post labeled “+”.
An ON-OFF manual switch is optional for DC power. This can be used to cut
off power connections, and as a RESET for the switch.
B4.1
UL Requirements
1.
Minimum 18 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.
B5.0 OPERATION
Operation of the Magnum Quad-Series Switch with the optional -48VDC, 24V,
100 and 125VDC power supply is identical to that of the AC-powered models.
36-70VDC
_
+
GND
ON
OFF
