GE instruction manual ML1200, -48 V, 24 V, 125 V DC Installation

CHAPTER B: DC POWER INPUT DC POWER INPUT

B.4 ML1200, -48 V, 24 V, 125 V DC Installation

This section describes the proper connection of the -48VDC leads (or 24VDC / 125VDC leads) to the DC power terminal block on the Multilink ML1200 Switch. The DC terminal block on the Multilink ML1200 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.

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.

The GND should be hooked up first. The ML1200 unit has a floating ground, so the user may elect to Ground either + or = terminal to suit the customer’s use.

Before connecting live power lines to the Terminal Block of –48VDC, 12VDC, 24VDC, 125VD or 250VDC products, 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 “+”.

MULTILINK ML1200 MANAGED FIELD SWITCH – INSTRUCTION MANUAL B–5