Chapter 3: Installation
Stratos EX Hazardous Area Aspirating Smoke Detection System Installation Manual 35
Figure 18 shows the RS-232 cable connection from an EX detector to a PC.
Figure 18: EX detector serial port connection for a PC
1
2
(1) Serial cable
(2) Serial port connection (to PC)
Event log
The event log is a record of detector events such as faults, alarms and function
changes. It is stored inside an operating detector and is updated whenever an
event occurs. The event log is nonvolatile, which means that it is retained when
the detector is turned off. The last 200 detector events may be stored.
An event is defined as:
• A change to any programmed function
• A detector output level meeting or exceeding the PreAlarm, Aux, Fire 1, or
Fire 2 alarm thresholds
• A fault condition such as a flow or dust separator (filter) fault
• A start of day or night operation
• Demonstration mode start
• FastLearn start or stop
• Power on or off
Events can either be viewed on a PC screen or downloaded to disk by running
the Remote Configuration Software program.
When the detector event log is full (200 events have been logged) and a new
event occurs, the oldest event in the log is deleted (First-In, First-Out).
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