Generator Mode Setup - Gamatronic Centric 3x480 Vac User Manual

The connections for output dry contacts 3 through 6 are located in connector group 1 (see Chapter 8).
Each of these output dry contacts has 3 pins: COMx, NCx, and NOx (where "x" is the number of the output
dry contact).
When connecting an output dry contact to the external circuit, the connection must be made using the
COMx pin and either the NCx or NOx pin. Use of the NCx pin results in the circuit being Normally Closed.
Use of the NOx pin makes the circuit Normally Opened.
7.2.10.2.4 O
UTPUT DRY CONTACTS IN ACTION
Upon the occurrence of any of the alarm conditions in Table 8, the output dry contact(s) associated with
that alarm (if any) changes state. Output dry contacts 1 and 2 are always Normally Open, so they close
while the alarm exists. Output dry contacts 3 through 6 will change state from open to closed or from closed
to open, depending on whether the NCx or NOx pin was used in connecting the output circuit. When the
alarm condition ceases, the output dry contact reverts to its normal state.
7.2.10.2.5 T
ESTING 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 54).
Pressing the test button changes the state of the output dry contact to its "non-Normal" condition for about
five seconds.
7.2.10.3

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, choose any one of the voltage-free contacts AUX1 through AUX5 (Figure 55), 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 Centric
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
7.2.10.1.2. Be sure also that the input dry contact you choose has an "enabled" status (Figure 53).
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AMATRONIC LECTRONIC
Figure 55: Generator mode setup screen
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NDUSTRIES TD
CENTRIC 3x480, User Guide, rel. 1.7