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MedPlus TotalAlert® Alarm Network Operation and Maintenance Manual (205728)
Theory of Operation
Chapter 3: Theory of Operation
The Area Alarm contains between one and six gas-specific Area Alarm Modules
that continuously display the remotely monitored gas line pressure or vacuum of
specific areas within the facility. They remotely monitor the pipelines by using
gas-specific transducers. The inputs from the transducers are supervised for both
open-circuit and short-circuit conditions.
The Area Alarm Modules are configured at the factory for the specific gas and
units of measure specified by the customer. The alarm setpoints for the Area
Alarm Modules are pre-set according to NFPA 99 standards.
The Local Alarm also monitors the source equipment, but it is not required if
every piece of source equipment has its own alarm indicator. The Local Alarm
may combine several input signals into one output that can be wired to the
Master Alarm so that the Master Alarm can monitor them.
The Master Alarm can be configured by using either the Web pages or its front
panel. The Area Alarm Modules can be configured only from their front panels,
and the Local Alarm inputs are hard-wired only.
During normal conditions, the following conditions are present:
• Local Alarm’s LEDs are green.
• Master Alarm’s LEDs are green, unless the input is not used; then the LED is
off.
• Master Alarm’s display scrolls “No Alarms” across the screen.
• Area Alarm Modules’ Normal LEDs light.
• Area Alarm Modules display the current pressure or vacuum reading.
During normal conditions, and when the Network Communications Board is
installed in the Area Alarm, the following conditions are logged into the event
logs of both the Master Alarm and the Area Alarm:
• Pressing the Test key on either the Master Alarm or the Area Alarm along
with the test information.
• Entering the Setup mode on either the Master Alarm or the Area Alarm.
• Daily self-checks on both the Master Alarm and the Area Alarm.
During an alarm condition on the Local Alarm, the alarm sounds, and the corre-
sponding red LED lights.
During an alarm condition or a system error on the Master Alarm, the following
occurs:
• Master Alarm sounds an alarm, and the corresponding red alarm LED lights,
if applicable (errors do not light LEDs).
• Message displays.
Summary of Contents for MedPlus TotalAlert
Page 370: ...Schematic Wiring Diagram Typical Local Alarm...
Page 371: ...Schematic Wiring Diagram Typical Master Alarm...
Page 372: ...Schematic Wiring Diagram Typical Master Alarm to Master Alarm...
Page 373: ...Schematic Wiring Diagram Typical Area Alarm...
Page 374: ...Schematic Wiring Diagram Typical Master Alarm to Three Area Alarm...
Page 375: ...Schematic Wiring Diagram Typical Master Alarm to Six Area Alarm Combination...
