EPC Epaco E10-0066 Owner's manual

Manual P/N E06-051
Rev. No: 8, 10/06
E10-0066
Installation and Operation
Instructions

FIKE CORPORATION
FM 3020541 Fike Explosion Protection System Page i
P/N E06-051 Rev. 8 10/06
Introduction
Fike is pleased to present a new Installation,
Operation and Maintenance Manual for our
Explosion Protection System. This document
has been created to incorporate the most up-to-
date information available for this Fike product
and to make it easy to use.
Who should read this manual?
This manual is intended for those individuals
who are custodians of the Fike EPACO
System. Others such as architects, engineers,
sales and marketing personnel, etc. will find the
information useful as well.
Warranty Information
Fike provides a one-year limited manufacturer’s
warranty on the product identified in this manual.
Copies of the warranty can be obtained from an
authorized Fike sales outlet. An authorized Fike
sales outlet, using the MRA procedure, must
return warranty items. See Section 11 of this
manual for details of returning product to Fike.
Limitation of Liability
Fike Corporation cannot be held liable for any
damages resulting from the use or misuse of this
product.
Copyright, Trademark and Licensing
Notice
All Fike documentation and hardware are
copyright with all rights reserved. No part of this
product may be copied, reproduced or
transmitted by any mechanical, photographic,
electronic or other method without Fike’s prior
written consent. Fike product names are
trademarked; other product names, as
applicable, are trademarks of their respective
holders.
Disclaimer
The information contained in this manual is as
accurate as possible. This manual is intended
to be an aid to Fike authorized sales outlets or
engineers charged with the installation and
maintenance of the Fike Explosion Protection
System. Fike does not warrant that this manual
is technically correct, complete or the product
referenced herein is free from minor flaws. Fike
reserves the right to change the information
contained in this manual without notice.
Quality Notice
Fike Corporation has maintained ISO 9001
certification since 1996. Prior to shipment, we
thoroughly test our products and review our
documentation to assure the highest quality in
all respects. In a spirit of continuous
improvement, Fike welcomes your suggestions.
Please direct all suggestions or comments to
Fike Blue Springs Product Support
Phone: [phone]
Fax: [phone]
or
Fike Europe Product Support
Phone: [phone]
Fax: [phone]
Any suggestions or comments become the
property of Fike Corporation.

FIKE CORPORATION
Page ii Fike Explosion Protection System FM 3020541
10/06 P/N E06-051 Rev. 8
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FIKE CORPORATION
FM 3020541 Fike Explosion Protection System Page iii
P/N E06-051 Rev. 8 10/06
Table of Contents
1.0 Terms and Symbols Used In This Manual.......................................................................................... 1
2.0 EPACO System Overview..................................................................................................................... 2
3.0 System Components............................................................................................................................. 3
4.0 Installation ............................................................................................................................................. 4
4.1 Installation Overview ........................................................................................................................... 4
4.2 Power Specifications ........................................................................................................................... 4
4.3 Configuration ....................................................................................................................................... 5
4.4 Dip Switch Configuration ..................................................................................................................... 5
4.5 Explosion Protection Controller ........................................................................................................... 6
4.6 Inputs................................................................................................................................................... 7
4.6.1 Detection Inputs (P2 & P3-1)........................................................................................................ 7
4.6.2 Supervisory Circuit (P4)................................................................................................................ 9
4.6.3 Disable Circuits (P4)................................................................................................................... 10
4.7 Outputs .............................................................................................................................................. 11
4.7.1 Series Firing Circuit (P3-2) ......................................................................................................... 11
4.7.2 Trouble Relay (P6-1) .................................................................................................................. 12
4.7.3 Alarm Relay (P6-2) ..................................................................................................................... 12
4.8 Bus Communications......................................................................................................................... 13
4.8.1 Fire Bus (P1-2) ........................................................................................................................... 13
4.8.2 Status Bus (P1-1) ....................................................................................................................... 14
4.9 Power Input ....................................................................................................................................... 15
4.9.1 Power Input (P5)......................................................................................................................... 15
5.0 Operation ............................................................................................................................................. 16
5.1 EPC Status ........................................................................................................................................ 16
5.1.1 EPC Normal State ...................................................................................................................... 16
5.1.2 EPC Trouble State...................................................................................................................... 16
5.1.3 EPC Alarm State ........................................................................................................................ 16
5.2 Disarming the EPC ............................................................................................................................ 17
5.3 Event History ..................................................................................................................................... 17
5.4 Alarm Operation ................................................................................................................................ 18
5.4.1 Single Detector Release............................................................................................................. 18
5.4.2 Cross Zone Detection Release .................................................................................................. 18
5.5 System Communications................................................................................................................... 18
5.5.1 Status Bus .................................................................................................................................. 18
5.5.2 Fire Bus ...................................................................................................................................... 18
5.5.3 Remote Bus................................................................................................................................ 18
6.0 Periodic Maintenance ......................................................................................................................... 21
6.1 General.............................................................................................................................................. 21
6.2 Inspection Procedure......................................................................................................................... 21
6.3 Routine Inspections........................................................................................................................... 21
6.4 Three-Year Replacement .................................................................................................................. 21
6.5 Ten-Year Replacement ..................................................................................................................... 21
7.0 Decommissioning Procedure / Check-List....................................................................................... 22
8.0 EPC Spare Parts.................................................................................................................................. 23
9.0 LED/Buzzer Diagnostics..................................................................................................................... 24
10.0 Specifications...................................................................................................................................... 25
11.0 Repair and Return Authorization....................................................................................................... 27

FIKE CORPORATION
Page iv Fike Explosion Protection System FM 3020541
10/06 P/N E06-051 Rev. 8
List of Exhibits
Exhibit 2-1 EPACO System Block Diagram ....................................................................................................... 2
Exhibit 3-1 EPC Photo........................................................................................................................................ 3
Exhibit 4-1 Serial Port......................................................................................................................................... 5
Exhibit 4-2 DIP Switches .................................................................................................................................... 5
Exhibit 4-3 EPC Block Diagram.......................................................................................................................... 6
Exhibit 4-4 EPC Top View – P2-P4 Wiring Connections.................................................................................... 6
Exhibit 4-5 Detection Circuit 1 or 2 (Class B) ..................................................................................................... 7
Exhibit 4-6 Detection Circuit 3 – NO (Class A) ................................................................................................... 7
Exhibit 4-7 Detection Circuit 3 – NO (Class B) ................................................................................................... 7
Exhibit 4-8 Detection Circuit 3 – NC (Class A) ................................................................................................... 8
Exhibit 4-9 Detection Circuit 3 – NC (Class B) ................................................................................................... 8
Exhibit 4-10 Supervisory Circuit – Single Device ............................................................................................... 9
Exhibit 4-11 Supervisory Circuit NO – Single or Multiple Devices (Preferred Wiring Method for NO Circuits).. 9
Exhibit 4-12 Supervisory Circuit NC – Single or Multiple Devices (Preferred Wiring Method for NC Circuits).. 9
Exhibit 4-13 Disable Circuit – Single Device .................................................................................................... 10
Exhibit 4-14 Disable Circuit – Single or Multiple Devices (Preferred Wiring Method for NO Circuits) ............. 10
Exhibit 4-15 GCA Series Firing Circuit ............................................................................................................. 11
Exhibit 4-16 Optional GCA Series Firing Circuit............................................................................................... 11
Exhibit 4-17 EPC Bottom View – P6 Wiring Connections ................................................................................ 12
Exhibit 4-18 Trouble / Supervisory Relay ......................................................................................................... 12
Exhibit 4-19 Alarm Relay .................................................................................................................................. 12
Exhibit 4-20 EPC Top View – P1 Bus Wiring Connections .............................................................................. 13
Exhibit 4-21 EPC Fire Bus – Single EPC ......................................................................................................... 13
Exhibit 4-22 EPC Fire Bus – Multiple EPCs ..................................................................................................... 13
Exhibit 4-23 Status Bus Wiring ......................................................................................................................... 14
Exhibit 4-24 P5 Power Input Wiring Connection .............................................................................................. 15
Exhibit 4-25 Power Input Wiring ....................................................................................................................... 15
Exhibit 5-1 Power LED ..................................................................................................................................... 16
Exhibit 5-2 Trouble LED ................................................................................................................................... 16
Exhibit 5-3 Alarm LED ...................................................................................................................................... 16
Exhibit 5-4 Event History Table ........................................................................................................................ 17
Exhibit 5-5 Status Bus ...................................................................................................................................... 18
Exhibit 5-6 Fire Bus .......................................................................................................................................... 18
Exhibit 5-7 Remote Bus.................................................................................................................................... 18
Exhibit 5-8 Configuration Table for Explosion Protection Controller ................................................................ 19
Exhibit 5-9 Metric Configuration Table for Explosion Protection Controller .....................................................20
Exhibit 7-1 Decommissioning Steps ................................................................................................................. 22
Exhibit 8-1 Spare Parts List .............................................................................................................................. 23
Exhibit 9-1 LED/Buzzer Diagnostics................................................................................................................. 24
Annex A EPC Wiring Diagram.......................................................................................................................... 29
Annex B EPACO Wiring Diagram..................................................................................................................... 31

FIKE CORPORATION
FM 3020541 Fike Explosion Protection System Page 1 of 32
P/N E06-051 Rev. 8 10/06
1.0 TERMS AND SYMBOLS USED IN THIS MANUAL
Term/Symbol Description
Alarm symbol. This symbol is on the face of the EPC next to the red alarm
LED. This LED will illuminate when the EPC has validated an alarm signal
from a detection device, and as a result, initiated the actuators. (“Alarm”
Red LED ON, Piezo sounding continuous) The alarm occurs when an input
circuit configured for alarm operation has been activated. A detector or
other contact device typically initiates activation.
Trouble symbol. This symbol is on the face of the EPC next to the yellow
trouble LED. This LED will illuminate on any trouble condition where the
EPC’s monitoring system is indicating a fault in one or more of its systems.
The EPC may or may not be able to provide a response to an activation
signal, depending upon the exact nature of the fault.
DC Power symbol. This symbol is on the face of the EPC next to the green
LED. This LED illuminates at a normal state to indicate that the unit is
receiving power.
Fire Bus symbol. The Fire Bus is a high-speed circuit that sends the fire
signal out to other EPCs in the protection zone and also receives the fire
signal from other EPCs of that protection zone.
Status Bus symbol. The Status Bus circuit is a low speed network
connection that sends status information to other modules. This bus
transmits “state” information to the zones.
Remote Bus symbol. This circuit is a low speed network connection that
sends status information from the Annunciator Modules to a computer for
system monitoring. This network is provided to support future upgrades to
the EPACO system – features associated with this network are currently
not implemented.
Symbol for “ohm”. Unit of resistance.
Fuse symbol. This designation represents a circuit protection fuse. The
fuse is rated at the amperage noted next to this marking.
DB9
Computer Connection symbol. This designation represents the location
for the computer connection. Using a straight-through serial cable, the
PSU can be connected from this DB9 connection to a computer serial port.
The EP Works software can be installed on the computer and provide
operational information.
Actuator An actuator is the electrically actuated firing device used to initiate the
closing of an isolation valve or discharge a suppression container.
Typically actuators are a Gas Cartridge Actuator (GCA) or a detonator.
Cross-zone
Detection Detection scheme where two detector input channels must activate before
the system releases. The first detector does not latch. This is sometimes
referred to as “AND” configuration.
Disabled State The condition when the EPC is not allowed to initiate the actuators.
Normal State The system is in the normal state when the power supply and all circuits are
properly configured, connected, and responding. (Yellow “Trouble” LED
Off, Red “Alarm” LED Off, Green “24VDC” LED On) The system remains in
normal state until a trouble or alarm condition occurs.

FIKE CORPORATION
Page 2 of 32 Fike Explosion Protection System FM 3020541
10/06 P/N E06-051 Rev. 8
2.0 EPACO SYSTEM OVERVIEW
The EPACOSystem is a modular detection
and control system combining the latest in
addressable technology with simplicity of
installation and maintenance. All system
modules are DIN rail mounted to allow for a
variety of installation options. Three (3) bus type
communication circuits tie the various system
modules into one easy to operate protection
system. A non-volatile history buffer allows for
enhanced diagnostic ability to troubleshoot
process situations. With the optional
Annunciator Module (AM), the customer has the
ability to step through a menu format to retrieve
process history without having to wait for a
service agency to arrive on site.
This manual will provide the necessary
information to properly install and monitor the
Explosion Protection Controller (EPC) for the
EPACOSystem. The commissioning and
service should be performed by certified service
engineers and outlets specifically trained on this
system.
Exhibit 2-1 EPACO System Block Diagram
POWER
SUPPLY
UNIT
ANNUNCIATOR
MODULE EXPLOSION PROTECTION
CONTROLLER
RELAY
CONTROL 8
(8 RELAYS)
UP TO 6
RELEASING
DEVICES

FIKE CORPORATION
FM 3020541 Fike Explosion Protection System Page 3 of 32
P/N E06-051 Rev. 8 10/06
3.0 SYSTEM COMPONENTS
The cornerstone of the system is the Explosion
Protection Controller (EPC). Three colored LEDs
provide instant visual indication of system
status. The DIN rail mounting allows for
flexibility when choosing an enclosure. The EPC
is an addressable panel that has the ability to
retain an event history for enhanced system
diagnostics. The EPC is a component that
allows mounting in close proximity to the
protected environment, thereby minimizing field
wiring. Shorter wire runs greatly reduce the
interference from electrical and radio frequency
sources, allowing for a much more reliable
protection system. The EPC’s detection inputs
can be programmed for pressure warning,
threshold detection, and rate of rise detection. It
also has a contact closure detection circuit to
support thermal, infrared, or other switch-closure
type detection devices1. A supervisory input
circuit is provided to monitor suppression
container pressure or other similar system status
safeguards. The EPC has a remote disable
input contact to allow for disabling the EPC from
a customer PLC or other remote device during
product loading, cleaning, or maintenance. DIP
switches allow for basic system programming.
An RS232 connection is available at each
module for connection to a PC. Using the EP
WorksTM software, an authorized user can
access system diagnostics and more complex
programming by PC.
The EPC is powered by the other key
component in the EPACOsystem, the Power
Supply Unit (PSU). The PSU has six separate
24 VDC, 1 amp power output circuits capable of
powering up to four EPCs in addition to other
components of the EPACOsystem. The PSU
has the flexibility of containing its own battery
backup supply or the customer has the option of
supplying a backup power source. The PSU
has an imbedded power shutdown procedure in
the event of AC power failure, which prevents
the backup batteries from being completely
depleted. In addition to powering EPCs, the PSU
can power an Annunciator Module (AM) and
Relay Card Modules (RC8). The power circuit
dedicated for the Annunciator Module can not be
shut off. All other power output circuits can be
shut off for service on the various system
1FM Approved switch closure for use with Fike threshold
detector (E61-042-x) and Rate of Rise detector (E61-056-x).
Other switch closure, thermal, or infrared devices are not
approved by FM.
components. The PSU may be eliminated if
battery backed, uninterrupted 24VDC, 0.500
Amps power per module can be provided by
others. For an FM approved installation without
the PSU, the uninterruptible power must be U.L.
1778 “Uninterruptible Power Systems” listed,
and conform to NFPA 72 “National Fire Alarm
Code”, NFPA 70 “National Electrical Code”
(Articles 700 and 701), NFPA 110 “Standard for
Emergency and Standby Power Systems”, and
NFPA 111 “Standard on Stored Electrical
Energy Emergency and Standby Power
Systems”.
The Annunciator Module (AM) provides a central
communication point for diagnostics. This
module will typically be installed in an area
removed from the process environment such as
a control room. The AM has two push buttons to
access the various menus and three numbered
LEDs for identification of the system statuses
within the menus.
The Relay Card Module (RC8) provides the user
with a block of eight form “C” relays for
equipment shutdowns and remote notification of
system trouble and alarm conditions. On-board
LEDs display status for instant visual verification
of each relay. DIP switches are provided for
configuring the relay’s operation.
Exhibit 3-1 EPC Photo

FIKE CORPORATION
Page 4 of 32 Fike Explosion Protection System FM 3020541
10/06 P/N E06-051 Rev. 8
4.0 INSTALLATION
4.1 INSTALLATION OVERVIEW
The effectiveness of active explosion protection
systems, such as explosion suppression and
explosion isolation, depends upon the
instantaneous reaction of the protection system
and is a direct function of its speed of response.
It is therefore, critical that all possible measures
are taken to reduce the individual system
components’ response times to an absolute
minimum.
An active explosion protection system basically
consists of three components: One or more
explosion detectors, an electronic system
controller, and one or more protective devices
such as explosion suppressors or isolation
valves. Instrumentation wiring interconnects
these components.
The system controller is microprocessor-based
and shall be installed in a location that maintains
the EPC’s temperature rating of -18°C to 43°C
(0°F to 110°F) when it is installed in an auxiliary
housing. For FM Approved installations the
housing shall be a lockable enclosure
conforming to the installed area requirements as
defined by NEMA 250 “Enclosures for Electrical
Equipment (1000 Volts Maximum).”
Besides its function as a fire controller it also
incorporates an event table and a self-checking
feature to continuously monitor the complete
system-loop for errors or system defects.
Electronic devices, microprocessors,
pyrotechnic initiators, and field wiring are
influenced by the electromagnetic “environment”
surrounding these components. The use of
cellular telephones, transmitters, induction
motors, welding equipment or the presence of
power cables and transformers can create
environments with high levels of electromagnetic
radiation, resulting in induced electrical “noise”
or voltage peaks.
Such effects are known to designers and
manufacturers of instrumentation and control
systems (PLC’s), used in industrial
environments and are handled through the use
of specially designed electronic filters. These
filters neutralize the unwanted noise and offer a
“clean” signal for further processing. The filters,
however, result in a delay in the processing of
signals, and can therefore only be applied with
great care in explosion protection systems
where the effectiveness depends on the overall
response time.
In active explosion protection systems, a
balance must be maintained: The system must
be extremely fast to achieve the required
effectiveness, but at the same time must be
stable and insensitive to surrounding sources of
noise.
The system controller will detect and report
major system troubles (such as ground faults,
wire disconnection, and unstable input or output
signals) and indicates the need for appropriate
action.
The system controller will also detect
unacceptable levels of electromagnetically
induced noise. If the magnitude of the noise is
such that this may result in a risk for
spontaneous system activation or affect the
system’s performance, the controller will revert
to its default error-mode.
It is essential to practice extreme caution when
selecting component location, cable
specifications, cable routes, and the
“cleanliness” of the offered power source. In
order to reduce the electromagnetic induced
noise to a level that will not affect the required
performance of the explosion protection system,
verify all earth connections. It is preferred to
have the enclosure and conduits connected to
Protective Earth (similar with other building
grounds) while the drain wires from the field
wiring and each module ground connected to a
separate Instrument Earth. This Instrument
Earth connection shall not have inductive or
capacitive loading such as motors, welders, or
other industrial equipment. Where a separate
earth connection is not available, the drain wires
and module ground connections should be
made to battery common. Complying with the
following recommendations will help minimize
the induced noise to acceptable levels.
4.2 POWER SPECIFICATIONS
The AC supply (commonly supplied to the
EPACO Power Supply Unit, PSU) shall be wired
through a dedicated circuit to a
1002/120/240VAC 15 or 16 Amp circuit breaker.
High voltage circuits may NOT be run in the
same conduit as low voltage circuits.
Cabling from transformer to PSU shall be
1.3 mm2(16AWG) minimum not to exceed
3 meters (10 feet).
2Not FM Approved for 100 VAC.

FIKE CORPORATION
FM 3020541 Fike Explosion Protection System Page 5 of 32
P/N E06-051 Rev. 8 10/06
ADD
12
MODE
1234
Cabling from PSU to EPC shall be 0.8 mm2
(18AWG) minimum not to exceed 10 Ω
resistance.
A keyed selector switch is recommended in the
PSU to EPC power supply cabling to facilitate
reset of the EPC. This shall have a 30V, 1A
rating.
4.3 CONFIGURATION
The EPC, the AM, and the RC8 are all
programmable modules. System configuration
can be performed with DIPswitches on these
modules or by way of a DB9 serial port
connection to a PC using EPWorks™ Software.
EPC addressing is done using the two ADD
(address) DIPswitches. The four MODE DIP
switches are used for programming specific
configurations. Expanded programming may be
created via PC with Fike's EPWorks™ Software.
Exhibit 4-1 Serial Port
The software also is used for extracting system
history information for activation analysis and
other diagnostic activity. Two levels of software
are utilized for the EPACO™ system. Level one
is a read-only user interface for the customer to
check the status/history of his system. Level
two is used by certified service technicians to
program and service customer installations.
NOTE: Address and configuration changes
are to be made by Fike authorized
engineers or technicians only.
4.4 DIP SWITCH CONFIGURATION
The EPACO system can have multiple EPC’s
connected to a single system. The ADD
switches enable the system to distinguish
between multiple EPC’s. The EPC is configured
using the MODE DIP switches on the face of the
unit. The configuration of the DIP switches set
the detection parameters of the EPC. The DIP
switches incorporate a safety feature that
prevents a programming change should one of
the DIP switches inadvertently get changed.
NOTE: The configuration should not be
changed. Any changes in configuration
must be approved by Fike Corporation.
Exhibit 4-2 DIP Switches
DB9 DB9
2A
- 2A - 24VDC
ADD MODE

FIKE CORPORATION
Page 6 of 32 Fike Explosion Protection System FM 3020541
10/06 P/N E06-051 Rev. 8
4.5 EXPLOSION PROTECTION CONTROLLER
The Explosion Protection Controller (EPC) is the main component in the system. It has five (5) input
contacts, three (3) outputs and two (2) bus communication connection points.
Exhibit 4-3 EPC Block Diagram
Exhibit 4-4 EPC Top View – P2-P4 Wiring Connections
P4P2 P3
BA P1
BA
4-20
mA
MAXIMUM
PRESSURE
PRESSURE
NETWORKS
OUTPUTS
E10-0066
EXPLOSTION PROTECTION CONTROLLER
6 ACTUATORS's
EQUIPMENT
EQUIPMENT
PROCESS MONITORING
PROCESS MONITORING
SERIES FIRING CIRCUIT
SPDT ALARMRELAY
mA
4-20 P2-1
P2-2
P5
BELDEN 9841 OR EQUIVALENT
2 WIRE, TWISTED SHIELDED CABLE
SPDT TROUBLE/SUPERVISORY RELAY
FIRE BUS ONLY
OTHER EPC(S)
PSU,AM, RC8(S)
FIRE BUS
STATUS BUS EPC(S) - STATUS BUS,
INPUTS
2 WIRE, TWISTED SHIELDED CABLE
DETECTION CIRCUIT 2
DETECTION CIRCUIT 1
SUPERVISORY CIRCUIT (CLASS B)
DETECTION CIRCUIT 3 (CLASS A OR B)
2 WIRE, TWISTED SHIELDED CABLE
2 WIRE, TWISTED SHIELDED CABLE
4-20mA
SWITCH(S)
PRESSURE SWITCH(S)
CONTACT CLOSURE
TRANSDUCER
TRANSDUCER
SUPERVISORY
DISABLE CIRCUIT (CLASS B)
2 WIRE, TWISTED SHIELDED CABLE
2 WIRE, TWISTED SHIELDED CABLE
POWER-24 VDC (18-30 VDC)
DISABLE
SWITCH(S)
2 WIRE, TWISTED SHIELDED CABLE
4-20mA
BELDEN 9841 OR EQUIVALENT
P3-1
P4-1
P4-2
P1-2 P1-1
P3-2
P6-1
P6-2

FIKE CORPORATION
FM 3020541 Fike Explosion Protection System Page 7 of 32
P/N E06-051 Rev. 8 10/06
Twisted Pair
Last Alarm
820 ohms Series
Contact
Device
End of Line
Device
Device
Initiating Initiating
Device
1st Alarm
Device
Contact
Series
Additional Alarm Initiating Devices
No termination
of Shield Wire
Shield
Shield Wire
- -
++
-
+
P3
2v4 2v4
[ insulate ]
2.4 volt zener diode
Twisted Pair
2.4 volt zener diode
Initiating
Contact
Device
Contact
Series
Last Alarm
2v4
Additional Alarm Initiating Devices
Series
Contact
Device
1st Alarm
Contact
Initiating
2v4
Drain Wire
Shield
+
++
- -
-P3
Shield
Twisted Pair
1 & 2
P2
mA
4-20
-
+
No termination
of Drain Wire [ insulate ]
Drain Wire
-
+
Pressure
Detector
4.6 INPUTS
4.6.1 Detection Inputs (P2 & P3-1)
The first two supervised inputs (P2) are 4-20mA
pressure detector circuits3. Only one detector is
permitted on each circuit. These are the primary
detection circuits for the EPACO system.
Instrument cabling or minimum 2 x 0.5 mm
twisted shielded pair cable (20 AWG) with drain
wire is recommended for this circuit. Maximum
resistance for this circuit is 30 Ω.
If the 4-20mA pressure detectors are placed in a
hazardous atmosphere, a Fike approved
transmitter power supply shall be used on each
detection circuit. Detectors used on these
circuits shall be rated for the hazardous location.
The third supervised input (P3) is used for
various “contact closure” type devices and can
be programmed (with EP Works software) for
normally open or normally closed operation. The
default setting is normally open. This could be a
thermal detector, optical detector,
mechanical pressure detector or
similar device4. This circuit is
reserved as secondary detection
input, but will activate the protection
system. Instrument cabling or
minimum 2 x 0.5 mmtwisted
shielded pair cable (20 AWG) with
drain wire is recommended for this
circuit. Maximum resistance for this
circuit is 30 Ω.
3FM Approved for use with Fike’s Ceramic, P/N 29945022-S.
4FM Approved switch closure for use with Fike threshold
detector (E61-042-x) and Rate of Rise detector (E61-056-x).
Other switch closure, thermal, or infrared devices are not
approved by FM.
Exhibit 4-5 Detection Circuit 1 or 2 (Class B)
WARNING: Transducer Simulator is used to
allow the EPC to enter a normal
state when no transducer is
connected. The Transducer
Simulator must be removed when
a transducer is connected to the
corresponding P2 input.
Exhibit 4-6 Detection Circuit 3 – NO (Class A)
Exhibit 4-7 Detection Circuit 3 – NO (Class B)

FIKE CORPORATION
Page 8 of 32 Fike Explosion Protection System FM 3020541
10/06 P/N E06-051 Rev. 8
Twisted Pair
Device
Contact
Series
2v4
Additional Alarm Initiating Devices
Alarm
Contact
Initiating
Drain Wire
Shield
+
++
- -
-P3
N/C
Alarm
Contact
Initiating
N/C
1st
Last
820 ohms
End of Line
Device
No termination
of Shield Wire
[ insulate ]
2.4 volt zener diode
Twisted Pair
Device
Contact
Series
2v4
Additional Alarm Initiating Devices
Alarm
Contact
Initiating
Drain Wire
Shield
+
++
- -
-P3
N/C
Alarm
Contact
Initiating
N/C
1st
Last
No termination
of Shield Wire
[ insulate ]
2.4 volt zener diode
Exhibit 4-8 Detection Circuit 3 – NC (Class A)
Exhibit 4-9 Detection Circuit 3 – NC (Class B)

FIKE CORPORATION
FM 3020541 Fike Explosion Protection System Page 9 of 32
P/N E06-051 Rev. 8 10/06
Supervision
Note: Wire Supervision Device shall
be mounted at 1st contact device in
order to properly supervise cabling.
Device
240 ohms
End of Line
Device
820 ohms
Wire
Contact
1st
of Drain Wire
No termination
Drain Wire
P4
+
-
Shield
Twisted Pair
[ insulate ]
or
Additional Supervisory Contacts
Device
820 ohms
End of Line
Device Series
Contact
Contact
Supervisory
Last
of Drain Wire
No termination
Twisted Pair
Device
Series
Contact
Contact
1st
Supervisory
Drain Wire
P4
+
-
Shield
2v4 2v4
[ insulate ]
2.4 volt zener diode
P4
Twisted Pair
Device
Contact
Series
2v4
Additional Supervisory Devices
Contact
Drain Wire
Shield
+
-
N/C
Super-
Contact
visory
N/C
1st
Last
820 ohms
End of Line
Device
No termination
of Shield Wire
[ insulate ]
2.4 volt zener diode
Super-
visory
4.6.2 Supervisory Circuit (P4)
The fourth input is for supervisory contact
devices (P4-1). This input circuit will not
discharge the protection system, but provides
notification of system trouble. The supervisory
input is designed to provide annunciation when
a physical condition exists that would affect the
protection system’s ability to properly respond to
a deflagration. Typical uses for this circuit could
be a low-pressure switch on a suppressant
container. The input contact can be NO or NC
type contact, programmable by the configuration
setting. The preferred “fail-safe” method is to
utilize the NC contact. Instrument cabling or
minimum 2 x 0.5 mmtwisted shielded pair
cable (20 AWG) with drain wire is recommended
for this circuit. Maximum resistance for this
circuit is 30 Ω.
Exhibit 4-10 Supervisory Circuit – Single Device
Exhibit 4-11 Supervisory Circuit NO – Single or Multiple Devices
(Preferred Wiring Method for NO Circuits)
Exhibit 4-12 Supervisory Circuit NC – Single or Multiple Devices
(Preferred Wiring Method for NC Circuits)

FIKE CORPORATION
Page 10 of 32 Fike Explosion Protection System FM 3020541
10/06 P/N E06-051 Rev. 8
Twisted Pair
Shield
of Drain Wire
No termination
Drain Wire
order to properly supervise cabling.
be mounted at 1st disable device in
Note: Wire Supervision Device shall
820 ohms 240 ohms
Device
End of Line
Device
Contact
Disable
1st
Supervision
Wire
-
+P4
[ insulate ]
Additional Disable Contacts
Device
820 ohms
End of Line
Device Series
Contact
Contact
Disable
Last
of Drain Wire
No termination
Twisted Pair
Device
Series
Contact
Contact
1st
Disable
Drain Wire
+
-
Shield
2v4 2v4
[ insulate ]
2.4 volt zener diode
P4
4.6.3 Disable Circuits (P4)
The fifth input contact is for remote disable
(P4-2). The EPC can be disabled with a
command from the AM or from a customer’s
remote PC or other contact device such as a
door switch. Contact closure will initiate the
disable sequence. When the EPC is disabled, a
fire signal cannot be sent out to the GCAs or
other EPCs. Instrument cabling or minimum
2 x 0.5 mmtwisted shielded pair cable
(20 AWG) with drain wire is recommended for
this circuit. Maximum resistance for this circuit
is 30 Ω.
Exhibit 4-13 Disable Circuit – Single Device
Exhibit 4-14 Disable Circuit – Single or Multiple Devices
(Preferred Wiring Method for NO Circuits)

FIKE CORPORATION
FM 3020541 Fike Explosion Protection System Page 11 of 32
P/N E06-051 Rev. 8 10/06
4.7 OUTPUTS
4.7.1 Series Firing Circuit (P3-2)
The main output circuit is the series firing circuit
(P3). This circuit sends the activation signal to
the protection devices to either discharge
suppressant or close isolation valves. The
series firing circuit can activate up to six (6)
actuators5. LIY-CY cable or twisted shielded pair
with drain wire is recommended for this circuit.
Total loop length should not exceed 300 m
(1,000 ft) with a maximum distance between any
two connection points of 100 m (300 ft).
Maximum 10 Ωloop resistance, minimum 0.75
mm(18 AWG), maximum cable section
determined by cable glands and terminals –
refer to component data sheets.
5FM Approved for use with Fike’s GCA, P/N 02-4134.
Exhibit 4-15 GCA Series Firing Circuit
Exhibit 4-16 Optional GCA Series Firing Circuit
of Drain Wire [ insulate ]
No Termination
Twisted Pair
Shield
Drain Wire
+
-
P3
GCA #1 GCA's 2, 3, 4 & 5
Shunt
Last GCA
Shunt ( & insulate )
No termination
of Drain Wire
of Drain Wire
No termination
No termination
of Drain Wire
No termination
of Drain Wire
(supplied by others)
Terminals located
inside field junction box
+
-
P3
GCA #4, #5
Shield
Twisted Pair
Drain Wire
GCA #6
GCA #3
GCA #2
GCA #1
[ insulate ]
[ insulate ]
[ insulate ]
[ insulate ]
Shunt ( & insulate )
Shunt ( & insulate )
Shunt ( & insulate )
Shunt ( & insulate )

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

FIKE CORPORATION
FM 3020541 Fike Explosion Protection System Page 13 of 32
P/N E06-051 Rev. 8 10/06
P4
BA P1 P2 P3
BA
Exhibit 4-20 EPC Top View – P1 Bus Wiring Connections
4.8 BUS COMMUNICATIONS
4.8.1 Fire Bus (P1-2)
The Fire Bus circuit is programmable for output,
input, or both (default). When the EPC has
received the activation signal from its detection
device, it sends a fire signal output through the
fire bus to all EPCs in the protection zone. Any
EPC that is programmed to respond to a fire
signal from this particular EPC will output
through its series firing circuit to discharge its
devices. Belden 9841 or RE-Y2Y cabling is
recommended for this circuit. Maximum
resistance R=50 Ω, inductance L=100uH, and
capacitance C= 0.02uF with a maximum length
of 300 m (1,000 ft).
Exhibit 4-21 EPC Fire Bus – Single EPC
Note: Wiring for a single EPC connects the
B+ to the A– and the B– to the A+. While for
multiple EPCs the B+ connects to the A+ on
the next EPC and the B– connects to the A–
on the next EPC. The Fire Bus must be a
closed loop or Class A bus as shown.
Note: The drain wire should only be con-
nected on one end of each wire run. Make
sure that the drain wire, which is not
connected to a terminal, is cut and insulated
from making contact to metal or other wiring
connections.
Exhibit 4-22 EPC Fire Bus – Multiple EPCs
Note: For proper Fire Bus communication, multiple EPCs connected on the Fire Bus shall be powered
up simultaneously.
P1
AB A
P1 Shield P1
B
Twisted Pair
Shield Wire
EPC #2
A B
Additional EPCs
Last EPC (Up to 32) EPC #1
P1
BA
EPC
++
-
-

FIKE CORPORATION
Page 14 of 32 Fike Explosion Protection System FM 3020541
10/06 P/N E06-051 Rev. 8
4.8.2 Status Bus (P1-1)
The Status Bus is a low speed communication
bus that transmits control information between
the EPC, Power Supply, Annunciator Module
and Relay Modules. Belden 9841 or RE-Y2Y
cabling is recommended for this circuit.
Maximum resistance R=50 Ω, inductance
L=100uH, and capacitance C=0.02uF with a
maximum length of 300m (1,000 ft).
Note: The B+ connects to the A+ on the next
device; similarly the B– connects to the A– of
the next device. Install the 140 Ω, 1/2 watt
resistor at each end as shown.
Note: The drain wire should only be con-
nected on one end of each wire run. Make
sure that the drain wire, which is not
connected to a terminal, is cut and insulated
from making contact to metal or other wiring
connections.
Exhibit 4-23 Status Bus Wiring
Additional RC8
Twisted Pair
Shield Wire
-
+-+
Relay Module
BA
(RC8) #1
P1 Shield -
+-+
BA
RC8 #2
P1 -
+-+
Last RC8(Up to 4)
BA
P1
140 ohm
of Drain Wire [ insulate ]
-
+-+
-
++
-
Twisted Pair
Shield Wire
Controller (EPC) #1
Explosion Protection
-++ -
BA
P1 Shield
Annunciator
Module (AM)
BA
++
--
BA
P1
EPC #2 Last EPC (Up to 4)
B
-+-
P1
A
+
Additional EPC
Unit (PSU)
Power Supply
BA
No termination
Shield Wire
Twisted Pair
140 ohm
P2 Shield P1