10 MULTILINK ETHERNET COMMUNICATIONS SWITCH – QUICKSTART GUIDE
QUICKSTART GUIDE
3.2 Powering the Unit - ML1600
Units with the AC power supply option can be connected directly to 110/240 VAC with the
supplied power cord.
The terminal block for the HI and LO option on the Unit is located on the left front of the
unit and is equipped with three (3) screw-down lead posts. The power terminals are
identified as positive (+) and negative (–), and they are floating inside the unit so that either
may be grounded by the user if desired. The chassis is “earth” or ground ( ).
The connection procedure is straightforward. Simply insert the DC leads to the Unit power
terminals, positive (+) and negative (-) screws. Please ensure correct polarity and that each
lead is securely tightened.
FIGURE 8: Power connection and alarm contacts
NOTE
Note Always use a voltmeter to measure the voltage of the incoming power supply and properly
determine the positive or negative leads.
NOTE
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.
When power is applied, the green PWR LED will illuminate.
3.3 Powering the Unit - ML1200/ML800
The DC internal power supply supports installation environments where the DC voltage is
from 18 to 150 volts depending on the model selected. The power consumption will range
from about 20 up to 35 watts, depending on the port quantity and types in the
configuration.. When connecting the Ethernet cabling, there is no need to power down the
unit. Individual cable segments can be connected or disconnected without concern for
power-related problems or damage to the unit.
Power input options are available to suit the ML1200/ML800 Switches to special high-
availability communications and/or heavy industrial-grade applications, including:
• -48VDC, 24VDC and 125VDC with single DC input,
• -48VDC, 24VDC and 125VDC with dual-source DC input
External AC power supplies are optional, see Section 1.2 of the Reference Manual for
Ordering Information.