2 INSTALLATION
2-16
state. Therefore, in any application where the
"process" is more critical than the motor, it is
recommended that the trip relay contacts be
programmed non-failsafe. In this case, it is also
recommended that the AUX2 contacts be
monitored for relay failure. If, however, the motor
is more critical than the "process" then the trip
contacts should be programmed failsafe.
2.8 Alarm Relay Contacts
These contacts are available as normally open (NO),
normally closed (NC), with the same ratings as the
Trip relay but can only be programmed to activate
when alarm setpoint levels are reached. (On a
Drawout version of 269, only one set of alarm
contacts is available and the user must specify
normally open or normally closed and failsafe or non-
failsafe when ordering). Thus these contacts may be
used to signal a low level fault condition prior to motor
shut-down.
Conditions which can be programmed to activate the
relay are alarm levels for the following functions:
immediate overload; mechanical jam; unbalance;
undercurrent; ground fault; stator RTD
overtemperature; RTD overtemperature; broken RTD;
low temperature or shorted RTD; and self-test alarm
(see section 3.4 for factory preset configurations).
The relay can be configured as latched or unlatched
and fail-safe or non-fail-safe.
Connections to the Alarm relay contacts are made via
a terminal block which uses #6 screws.
NOTE: The rear of the 269 relay shows output relay
contacts in their power down state. Figure 2.4, Figure
2.6 and Figure 2.7 show output relay contacts with
power applied, no trips or alarms, and Factory
Configurations in effect (i.e. TRIP - fail-safe, ALARM -
non-fail-safe, AUX.1 - non-fail-safe, AUX.2 - fail-safe).
See Figure 2.5 for a list of all possible contact states.
2.9 Auxiliary Relay #1 Contacts
Auxiliary relay #1 is provided to give an extra set of
NO/NC contacts which operate independently of the
other relay contacts. (On a Drawout version of 269,
only one set of Aux.1 contacts is available and the
user must specify normally open or normally closed
and failsafe or non-failsafe when ordering). This
auxiliary relay has the same ratings as the Trip relay.
Auxiliary relay #1 can be configured as latched or
unlatched and fail-safe or non-fail-safe. The
conditions that will activate this relay can be any trip
or alarm indications (see section 3.4 for factory preset
configurations).
These contacts may be used for alarm purposes or to
trip devices other than the motor contactor. For
example, the ground fault and short circuit functions
may be directed to Auxiliary relay #1 to trip the main
circuit breaker rather than the motor starter.
Connections to the relay contacts are made via a
terminal block which uses #6 screws.
NOTE: The rear of the 269 relay shows output relay
contacts in their power down state. Figure 2.4, Figure
2.6, and Figure 2.7 show output relay contacts with
power applied, no trips or alarms, and Factory
Configurations in effect (i.e. TRIP - fail-safe, ALARM -
non-fail-safe, AUX.1 - non-fail-safe, AUX.2 - fail-safe).
See Figure 2.5 for a list of all possible contact states.
2.10 Auxiliary Relay #2 Contacts
This relay provides another set of NO/NC contacts
with the same ratings as the other relays. (On a
Draw-out version of 269, only one set of Aux.2
contacts is available and the user must specify
normally open or normally closed when ordering).
This relay is different from the others in the fact that it
is permanently programmed as latched and fail-safe.
This relay may be programmed to activate on any
combination of alarm conditions (see section 3.4 for
factory preset configurations). The feature
assignment programming is thus the same as for the
Alarm relay.
Connections to the relay contacts are made via a
terminal block which uses #6 screws.
NOTE: The rear of the 269 relay shows output relay
contacts in their power down state. Figure 2.4, Figure
2.6, and Figure 2.7 show output relay contacts with
power applied, no trips or alarms, and Factory
Configurations in effect (i.e. TRIP - fail-safe, ALARM -
non-fail-safe, AUX.1 - non-fail-safe, AUX.2 - fail-safe).
See Figure 2.5 for a list of all possible contact states.
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