Electrical Installation, Powering the Unit ML2400

QUICKSTART GUIDE

3 Electrical Installation

3.1 Powering the Unit - ML2400

Units with the AC power supply option can be connected directly to 110/240 V AC with the supplied power cord.

The standard high voltage (120/125 V AC/DC) or low-voltage (48 V DC) terminal block on the Unit is located on the rear of the unit and is equipped with three (3) screw-down lead posts. The power terminals are identified as positive (+), negative (–), and filter ground (

) for DC power and as live L(+), neutral N(–), and for AC power. These terminals are floating inside the unit so that either may be grounded by the user if desired. The chassis or safety ground is the stud located beside the terminal block.

The connection procedure is straightforward. Simply insert DC leads to the Unit power

terminal positive (+), negative (–), and or AC leads to the live L(+), neutral N(–), and .

Please ensure the correct polarity. The should be connected to the safety ground, except during dielectric testing. Ensure that each lead is securely tightened.

FIGURE 7: Power connection and alarm contacts

Always use a voltmeter to measure the voltage of the incoming power supply and properly determine the positive and negative leads.

NOTE

The GND should be hooked up first. The Unit has a floating ground, so the user may elect to ground either the positive or negative terminal.

NOTE

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

The Unit is available with a redundant power supply option. If the redundant power supply is ordered, it should be wired as described above. The possible combinations of redundant power supplies are: HI-HI, HI-LO, LO-HI, and LO-LO. The AC power supply cannot be supplied with a redundant supply.

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1601-9026-A3 specifications

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