3 setting the digital output jumpers, Table 8 digital output jumper settings, 3 connecting analog inputs – Liebert Universal Monitor User Manual
Page 30: Setting the digital output jumpers, Connecting analog inputs, Table 8, Digital output jumper settings, Setting the digital output, Jumpers
Wiring and Connections - Main Board
22
4.2.3 Setting the Digital Output Jumpers
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.
4.3
Connecting Analog Inputs
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.
Table 8
Digital output jumper settings
Setting
Output status
(power loss & no battery backup)
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
Digital output jumpers
485
+
—
+
—
(TOP)
(BOTTOM)
0: COMMS
422
TB9: ANALOG
GROUND
AG
+
+
—
—
+
—
+
—
3-4 BOTTOM
1-2 TOP
Analog inputs
Analog ground