GarrettCom 4K-Series C5.1 UL Requirements, C6.0 Ordering Information, Example Magnum 4K8-48VDC

Magnum 4K8 Switches	Installation and User Guide				(10/04)
The -48VDC terminal block on the Magnum 4K-Series Switch is located on
the right rear of the unit and is equipped
with five (5) screw-down lead posts (see			A+ A-	B- B+
Fig C5.0). The primary terminals are
identified as positive (A+), negative (A-
), and the secondary power terminals as
negative (B-), positive(B+). The
chassis “earth” or ground (GND), is a		36-70VDC		36-70VDC		GND

threaded post with a #6 nut.

Figure C5.0: -48VDC Dual-Source, wiring connections to the External Terminal Block on a Magnum 48VDC with Dual-Source option

Note: The GND should be hooked up first. The 4K 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 Switch’s power terminals, positive (+) and negative (-) screws. The use of Ground (GND) is optional; it connects to the chassis. Ensure that each lead is securely tightened. The 24VDC & 125VDC terminal block on Magnum 4K-Series Switch also has everything similar to –48VDC info. Described 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-Src48V” as a separate line item following the product model.

Example: Magnum 4K8-48VDC

Dual-Src-48Vfor regular model with no ON-OFF switch

Or Dual-Src48V-SWITCHfor model with ON-OFF switch

Similarly, order “Dual-Src24V” or “Dual-Src125V” as a separate line item following the product model.

Example: Magnum 4K8-24VDC or Magnum 4K8-125VDC Dual-Src24V for regular model with no ON-OFF switch Dual-Src24V-SWITCH for model with ON-OFF switch

C7.0 OPERATION

Operation of the Dual-Source Magnum 4K-Series-48VDC, 24VDC & 125VDC Switch models are identical to that of the standard models.

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