UPS for 480 Vac Grid, User Guide, doc. rel. 4.0
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8.2.10.2.1.
Location of the output dry contacts
The connections for the output dry contacts are in “Connector group 2” on the front panel of the
UPS. (See Figure 1) The connections are on plugs P1 through P4 (and are named “digital output
#1” through “digital output #8”).
8.2.10.2.2.
Output dry contacts in action
Upon the occurrence of any of the alarm conditions in Table 4, the output dry contact(s)
associated with that alarm (if any) generates a message to the log file. A system snapshot is also
saved to the log file. When the alarm condition ceases, a message is written to the log file
informing of this.
8.2.10.2.3.
Testing an output dry contact
An output dry contact that has been associated with an alarm can be tested without actually
invoking the related alarm condition, by pressing the Test button at the bottom of the output dry
contact screen (see Figure 119).
Pressing the Test button changes the state of the output dry contact to its "non-
Normal" condition for about five seconds.
8.2.10.3.
Generator Mode setup
This function lets you instruct the UPS not to charge the batteries when the UPS is being fed by a
generator. The object is to avoid overloading the generator.
To use this function, select any one of the voltage-free contacts AUX1 through AUX5 (Figure 120),
and the desired normal state of the contact (normally open or normally closed). The generator
must change the state of the dry contact when it begins operation.
For example, if the normal state of the chosen dry contact is “open”, the generator must close the
dry contact circuit when it begins operation. This informs the UPS that the generator is providing
the input power and the batteries should not be charged.
Setting the normal state of the input dry contact (normally open or normally closed) is described
in Section 8.2.10.1.2. Be sure also that the input dry contact you select has an “enabled” status
(Figure 117).
