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INV 2500 SERIES MANUAL REV 1 1/13
SECTION 2
INSTALLATION
2.3
OPTIONAL ALARM CONTACTS
Units supplied with the bypass option also provide signal contacts that can be used
to set alarms or trigger other system related responses to operating conditions.
The alarm contact option provides the user with a convenient means of monitoring
of the status of : DC input, AC input, and INVERTER (inverter AC output). Each
function provides one set of “dry” C form contacts which accommodate any logic
required. The internal relays will change state if any of the three voltages are missing
or too low to provide proper operation. The contact rating of the alarm functions are
0.3 amp @ 125 Vac maximum. The figure 2-3 below illustrates the alarm internal
wiring.
Figure 2-3
To prevent possible EMI ( electro-magnetic interference ) alarm wiring should be
accomplished with twisted pairs. Shielding is also recommended. This will prevent
interference from entering or leaving the unit. All alarm connections should be made
with #6 inside diameter ring lugs. A rear panel terminal block is provided. See section
three of this manual for further information.
2.4
OPTIONAL STEP-UP TRANSFORMER
The INV series can provide a 220V or 240V output with the addition of an external
transformer chassis . With this option a second rack mountable chassis is provided
to convert the standard 120V output to the higher value. In addition, the bypass
option can also be included with the external transformer.
