ST-72 User's Manual
Document: UM-1007
Revision Level A
24
2.3.2.1 A1 A2 & A3
Alarm 1, Alarm 2, & Alarm 3
menus control how this alarm level from each channel
will affect the standard horn relay. Choices are
OFF
,
ON
or
BEEP
(one Hz. Pulsating).
As an example, A1 conditions might pulse the horn (
BEEP
) and A2 conditions to cause
a steady horn (
ON
). Any other combination of these 3 choices is possible for A1, A2,
and A3 levels affecting the horn relay. This feature is very useful since it allows the horn
relay to serve as another level A1, level A2, level A3 or both. Individual channel alarms
may also be configured to not affect the Horn relay on a channel by channel basis (
2.3.2.2 ACKNOWLEDGE
Turning
Acknowledge
YES
allows the Horn relay to be deactivated during alarm
conditions by an
Alarm Reset
. This is useful if an audible device is being driven by the
relay
2.3.2.3 FAILSAFE
Failsafe
controls relay activation for this relay.
Failsafe YES
causes the horn relay to
de-energize during alarm conditions and energize when there is no alarm. Thereby, a
power failure forces the relay contact to the alarm position.
2.3.2.4 PIEZO ALARM
Piezo Alarm ON
causes the audible piezo to duplicate the action of the horn relay.
This feature may be used to provide a low decibel indication of the status of the
system’s horn.
2.3.3
DISCRETE RELAY
10-00345 Discrete relay options may also be configured to function in a
Failsafe
mode
using the
ALARM OUTPUTS
menu shown in Figure 2-11. Entering
YES
causes these
discrete relays to have energized coils when no alarm condition exists for the associated
channel and de-energized coils when the alarm occurs.
Failsafe
is useful for indicating
failed relay coils and loss of power conditions.
Alarm Outputs
Standard Relay 2
Standard Relay 3
Horn/Piezo
Discrete Relay
Programmable Relay
Standard Relay 1
~
~
~
~
~
~
Discrete Relay
A2 Failsafe
A3 Failsafe
A1 Failsafe
No
No
No
Figure 2-11
Содержание ST-72
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Страница 108: ...ST 72 User s Manual Document UM 1007 Revision Level A 102 Figure 6 4...
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Страница 128: ...ST 72 User s Manual Document UM 1007 Revision Level A 122 8 5 3 COPY CHANNELS Figure 8 7...
Страница 129: ...ST 72 User s Manual Document UM 1007 Revision Level A 123 8 5 4 PROGRAMMABLE RELAYS Figure 8 8...
Страница 130: ...ST 72 User s Manual Document UM 1007 Revision Level A 124 8 5 5 SYSTEM CONFIGURATION Figure 8 9...