B4.0 6KQ, -48V, 24, 125VDC Installation

Magnum 6KQ Managed Field Switch Installation and User Guide

(04/07)

other communication companies. In addition, many high availability equipment services, such as broadcasters, publishers, newspaper operations, brokerage firms and other facilities often use a battery backup system to maintain operations in the event of a power failure. It is also frequently used for computer system backup, management and operations monitoring equipment.

The 24V and 125VDC options are particularly useful in the industrial environment, where it is common for facilities to operate on 24VDC or 125VDC power. The 125VDC options are mainly used in power utilities, such as electrical substations, electrical generating plants, etc. The 24VDC applications are mainly in heavy duty industrial automation such as factory floor, process plants, HVAC, military equipment, etc.

B4.0 6KQ, -48V, 24, 125VDC INSTALLATION

This section describes the proper connection of the -48VDC leads (or 24VDC / 125VDC leads) to the DC power terminal block on the Magnum 6KQ Switch. The DC terminal block on the Magnum 6KQ Managed Switch is located on the left front of the unit and is equipped with four (4) screw-down lead posts. The power terminals are identified as positive (+) and negative (-), and they are electrically floating inside the unit so that either may be grounded by the user if desired. The chassis is “earth” or ground (GND).

The connection procedure is straightforward. Simply insert the DC leads to the Switch’s power terminals, positive (+) and negative (-) screws. The use of Ground (GND) connects to the Switch chassis screw provided under the DC terminal. Ensure that each lead is securely tightened.

NOTE: Always use a voltmeter to measure the voltage of the incoming power supply and figure out the +ve potential lead or -ve potential lead. The more +ve potential lead will connect to the post labeled “+ve” and the rest to the “-ve”. The GND can be hooked up at the last.

When power is applied, the green PWR LED will illuminate.

Note: The GND should be hooked up first. The 6KQ unit has a floating ground, so the user may elect to Ground either + or = terminal to suit the customer’s use.

Before connecting hot lines to the 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 “+”.

B4.1 UL Requirements for DC-powered units

1.Minimum 18AWG cable for connection to a Centralized DC power source.

2.Minimum 14AWG cable for connection to a earthing wiring.

3.Use only with Listed 10 A circuit breaker provided in building installation.

4.“Complies with FDA radiation performance standards, 21 CFR subchapter J.” or equivalent.

5.Fastening torque of the lugs on the terminal block: 9 inch-pound max.

6.Centralized DC Power Source cable securement, use at least four cable ties to www . GarrettCom . com