FIKE CORPORATION
Page 18 of 32 Fike Explosion Protection System FM 3020541
10/06 P/N E06-051 Rev. 8
5.4 ALARM OPERATION
5.4.1 Single Detector Release
Upon activation of any detector input, system enters the alarm state. Typical response includes:
Piezo: On continuous
Alarm LED: On continuous
Alarm Relay: De-energized
Trouble LED: On
Trouble Relay: De-energized
Series Firing Output: Activation of actuators connected
Typical history codes as retrieved using the Annunciator Module or EPWorks Software would be 04, 25,
and 24.
5.4.2 Cross Zone Detection Release
Upon activation of a single detector input, system enters a pre-alarm state. Typical response includes:
Piezo: Off
Alarm LED: Fast Blink
Alarm Relay: Energized
Trouble LED: Off
Trouble Relay: Energized with DIP switch configurations
(may be configured as De-energized via EPWorks Software)
Typical history codes as retrieved using the Annunciator Module or EPWorks Software would be 04 and 27.
Upon activation of a second detector input, system enters the alarm state. Typical response includes:
Alarm LED: On continuous
Alarm Relay: De-energized
Trouble LED: On
Trouble Relay: De-energized, if not previously De-energized
Series Firing Output: Activation of actuators connected
Following first alarm, typical history codes as retrieved using the Annunciator Module or EPWorks Software
would be 09, 25, and 24.
5.5 SYSTEM COMMUNICATIONS
The EPACO System has three separate communication circuits, or buses. Two of the three bus circuits
are utilized on the EPC; the status bus and the fire bus.
5.5.1 Status Bus
The status bus ties all the various modules
together to form a network for reporting of
system status to an Annunciator Module.
5.5.2 Fire Bus
The fire bus is a high speed firing circuit that
sends the activation signal to other EPCs in the
protection zone to activate their respective
active devices.
Note: If power is cycled to an EPC with a Fire
Bus connected all EPCs connected to the
Fire Bus will also need to have their power
cycled simultaneously to restore the Fire Bus.
5.5.3 Remote Bus
The remote bus is a low speed communication
circuit that ties multiple Annunciator Modules
together for reporting system information to a
customer operated peripheral device, such as a
PLC or computer terminal.
Exhibit 5-5 Status Bus
Exhibit 5-6 Fire Bus
Exhibit 5-7 Remote Bus
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