Liebert Universal Monitor - Manual (Page 67)

System and Control Options
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9.7.3 Set Expansion Board Output by DIP Switch
If you choose Change State from the Setup Output Menu for an
Expansion Board output (OUTPUT09-16), the screen displays a mes-
sage that the state must be set by DIP switch, as shown at right.
Each digital output on the optional Expansion Board has an associated
DIP switch that can determine its operation in the event of loss of com-
munication with the Universal Monitor or loss of power.
To configure a digital output jumper for a loss of power:
• Move the switch down to the “OFF” position (factory default) for
Normally Open (NO).
• Move the switch up to the “ON” position for Normally Closed (NC).
For more information, see 5.2.3 - Setting the Digital Output DIP Switches.
9.7.4 Configure Main Board Output for Loss of Power (“Fail-Safe”)
Each digital output has an associated jumper that can help prevent undesired effects when the con-
troller board loses power. For example, without the proper fail-safe jumper setting, a loss of power
might close a switch that is Normally Open (NO)—perhaps shutting off a fan or closing a valve.
This fail-safe jumper setting is unrelated to configuring an output as Normally Open (NO) or Nor-
mally Closed (NC), as described in the previous section, Define Main Board Output as Normally
Open / Closed.
To configure a digital output jumper for a loss of power:
• Set the jumper in the “OFF” position (factory default) to make the output Normally Open (NO).
• Set the jumper in the “ON” position to make the output Normally Closed (NC).
For more information, see 4.2.3 - Setting the Digital Output Jumpers.
Setup Output Menu
CHANGE LABEL
> CHANGE STATE
↑ ↓=NEXT ↵
=SELECT
Message (if Expansion
Board output selected)
SET BY DIPSWITCH
ESC=BACK