FIKE CORPORATION
Page 12 of 32 Fike Explosion Protection System FM 3020541
10/06 P/N E06-051 Rev. 8
Exhibit 4-17 EPC Bottom View – P6 Wiring Connections
4.7.2 Trouble Relay (P6-1)
The trouble relay is a “fail-safe” relay that will
transfer upon any system trouble or supervisory
condition. This can be used for equipment
shutdown, visual, audible, or other type
annunciation. Trouble conditions may or may
not affect the protection system’s ability to
respond to a deflagration, but must be
acknowledged and identified prior to continuing
to run the process.
Note: The relay designations (NO, NC, and
C) are shown in the de-energized state
with no power applied. When the EPC is
powered and the controller is in the
NORMAL state, the trouble relay is
energized. (The trouble relay marking is
opposite of what is expected).
4.7.3 Alarm Relay (P6-2)
The Alarm relay is a “fail-safe” relay that will
transfer upon any system Alarm condition. This
can be used for equipment shutdown, visual,
audible, or other type annunciation.
Note: The relay designations (NO, NC, and
C) are shown in the de-energized state
with no power applied. When the EPC is
powered and the controller is in the
NORMAL state, the alarm relay is
energized. (The alarm relay marking is
opposite of what is expected).
Exhibit 4-18 Trouble / Supervisory Relay
Exhibit 4-19 Alarm Relay
Process Monitoring
NO
P6
C
NC
Equipment (*See Note*)
Process Monitoring
NO
P6
C
NC
Equipment (*See Note*)
P6P5
24VDC
CNO NC CNO NC
FM
APPROVED
Contact: www.fike.com
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