RC Systems ST-72, Инструкция по эксплуатации

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ST-72 User's Manual
Document: UM-1007 Revision Level A
23
2.3.1.3 FAILSAFE
Failsafe
controls relay activation for this standard relay.
Failsafe YES
causes the
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. Note the
standard Fault relay is always failsafe and may be monitored separately to indicate loss
of power conditions in many applications.
2.3.1.4 ZONE 1-8
Zones
offer additional flexibility by controlling which channel zones trip this menu’s
standard alarm relay. There are eight possible zones that can be assigned to the relays
individually. Some applications have different types of sensors, or sensors in different
areas connected to the same ST-72 Controller. In these cases, it may be undesirable for
a sensor in one area to trip the same relay as a sensor in another area. The
Zone
menus may restrict this. For example, channels 1-32 might be set to trip standard relay
1 while channels 33-64 trip standard relay 2. This is done by assigning channels 1-32 to
zone 1 and channels 33-64 to zone 2 and turning only zone 1 to
YES for Standard relay
1 and only zone 2 to YES for standard relay 2. Another possibility is channels 1-32 be
set to trip standard relay 1 while channels 33-64 trip relays on an optional discrete relay
PCB configured for Alarm 1 (
see section 3.2.2 ).
2.3.1.5 OVERRIDE CHANNELS 1-8
Override
allows entering one of the 256 different alarms that will trip this relay
regardless of the
Votes
or
Zone
entries. There are four alarms per channel and 64
channels and any one of these alarms may be used as the Over Ride. This feature is
useful when one channel’s alarm has more significance than the others. Up to eight
override alarms may be entered per relay.
2.3.2 HORN/PIEZO
The ST-72 is equipped with a low decibel audible piezo which chirps when keys are
pressed and may be configured to audibly indicate alarm conditions. The standard horn
relay is similar to the standard A1 & A2 relays.
Alarm Outputs
Standard Relay 2
Standard Relay 3
Horn/Piezo
Discrete Relay
Programmable Relay
Standard Relay 1
~
~
~
~
~
~
Horn/Piezo
Alarm 2
Alarm 3
Acknowledge
Failsafe
Piezo Alarm
Alarm 1
On
On
Yes
No
No
Beep
Figure 2-10