Liebert Universal Monitor 用户手册

Each digital output has an associated jumper to define its operation when power is interrupted and 

there is no battery backup to the board. This puts the Universal Monitor in a fail-safe mode and 

ensures proper functioning when the board has no power or battery backup.
The Universal Monitor comes from the factory with 

all digital output jumpers in the OFF position (nor-

mally open). The jumper setting for each digital 

output can be changed to ON (normally closed). 

The settings are shown in Table 8.

To change the output jumper setting:
1. Find the respective black output jumper on the 

circuit board, as shown above.

2. Decide whether your configuration requires 

the jumper to be OFF or ON.

3. Set the jumper as needed:

• Set the jumper to OFF by placing the black 

jumper on the middle and top pins.

• Set the jumper to ON by placing the black 

jumper on the middle and bottom pins.

The analog input connector blocks are at the bottom 

center of the Universal Monitor printed circuit board. 

The blocks are two-part assemblies to permit easier 

connections. To determine the proper wire size, see 

Table 7 - Wiring specifications - main board.
To connect an input:
1. Turn OFF electrical power to the Universal 

Monitor.

2. If necessary, remove a conduit knockout to permit 

wire entry into the Universal Monitor enclosure.

3. Bring the wire(s) into the Universal Monitor 

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.

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

OFF

Normally open

ON

Normally closed

TB3:

RELAY

OUTPUTS

REV

ON

PFM5

OFF

ON

PFM2

OFF

(BOTTOM)

(TOP)

4

3

2

1

8

7

6

5

(BOTTOM)

(TOP)

4

3

2

8

7

6

485

+

—

+

—

(TOP)

(BOTTOM)

0: COMMS

422

TB9: ANALOG

GROUND

AG

+

+

—

—

+

—

+

—

3-4  BOTTOM

1-2  TOP