Emerson Liebert Remote Monitoring Panel User Manual download pdf (Page 37)

Wiring and Connections - Optional Expansion Board

29 Liebert

Universal Monitor

™

5.3 Connect to the Liebert Universal Monitor

Two steps are required to establish connection between the optional Expansion Board and the Liebert

Universal Monitor.

5.3.1 Connect EIA485 Connectors to Main Board

To connect the optional Expansion Board to the Liebert Universal Monitor:

1. Turn OFF electrical power to the Liebert Universal Monitor and disconnect power from the

Expansion Board.

2. If necessary, remove a conduit knockout to permit wire entry into each enclosure.

3. Bring the wire(s) into each enclosure through a conduit knockout or access slot.

4. Loosen the appropriate screw and slip the stripped end of the wire into the terminal block,

connecting the cables as shown in the figure below):

• Connect the Liebert Universal Monitor 485 connector UM- to Expansion Board connector

EIA485+.

• Connect the Liebert Universal Monitor 485 connector UM+ to Expansion Board connector

EIA485-.

5. Tighten each screw until it holds the wire snugly.

5.3.2 Enable the Connection via Firmware

After making the cable connections described in the previous section, you must specify the Expansion

Board as connected using either the LCD or Service Terminal Interface.

For instructions, refer to the appropriate section:

• LCD interface (see 9.10 - Setup Exp Board - Optional Expansion Board)

• Service Terminal Interface (see A.6.8 - Connect Expansion Board)

485

—

(TOP)

(BOTTOM)

TB1

422

S4 S3 S2 S1

Multiex 168AO

810-3065

POWER INPUT

EIA485 + (to UM-)

EIA485 - (to UM+)

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Emerson Liebert Remote Monitoring Panel User Manual Page 37