Ampcontrol IPM V2 User manual

Revision: 15, May 2018
Designed and manufactured in Australia by Ampcontrol Pty Ltd
IPM V2
INTEGRATEDPROTECTIONRELAY
UserManual

Ampcontrol Pty Ltd –ABN 28 000 915 542
IPM V2 USER MANUAL
IPM2B003 Revision 15 –MAY/18
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WARNING!
The warning symbol highlights a potential risk of injury or death.
Please share these warnings with other operators.
CAUTION!
The caution symbol highlights a potential risk of damage to
equipment.
Please share these cautions with other operators.
NOTE
The note symbol highlights key information.
Please share these notes with other operators.
ENVIRO
The enviro (environmental) symbol highlights areas which may have an
impact on the surrounding fauna and/or flora.

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Copyright Notice
The Ampcontrol relay described in this document is the property of AMPCONTROL PTY LTD. It is
furnished under a license agreement and is to be used only in accordance with the terms of the
agreement.
No part of the hardware or documentation may be reproduced, transmitted, transcribed, stored in a
retrieval system, or translated into any language or computer language, in any form or by any means,
without prior written permission of AMPCONTROL PTY LTD.
Disclaimer
While every effort has been made to assure the accuracy and clarity of this document, AMPCONTROL
PTY LTD assumes no liability resulting from any omissions in this document, or from misuse of the
information obtained herein. The information in this document has been carefully checked and is
believed to be entirely reliable with all of the necessary information included. AMPCONTROL PTY LTD
reserves the right to make changes to any products described herein to improve reliability, function, or
design, and reserves the right to revise this document and make changes from time to time in content
hereof with no obligation to notify any persons of revisions or changes. AMPCONTROL PTY LTD does
not assume any liability arising out of the application or any use of any product or circuit described
herein; neither does it convey license under its patent rights or the rights of others.
Before You Begin
Thank you for purchasing the Ampcontrol IPM V2 Integrated Protection Relay.
WARNING!
In the interests of safety and correct equipment operation, please
take the time to read and understand the content in this manual.
Ampcontrol Contact Details
7 Billbrooke Close, Cameron Park, NSW, 2285
P [phone] | F [phone]
EMAIL: customerserv[email protected]
WEB: ampcontrolgroup.com

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IPM V2 USER MANUAL
IPM2B003 Revision 15 –MAY/18
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TABLE OF CONTENTS
1 SAFETY AND OTHER WARNINGS..................................................................9
1.1 Safe Use of Equipment..............................................................................9
2 RECEIVING AND STORAGE..........................................................................10
2.1 Receiving.................................................................................................10
2.2 Inspection................................................................................................10
2.3 Storage after Delivery..............................................................................10
2.4 Unpacking of Equipment..........................................................................10
3 PRODUCT OVERVIEW ..................................................................................11
3.1 IPM V2 Relay...........................................................................................11
3.2 Accessories.............................................................................................14
4 INSTALLATION...............................................................................................16
4.1 General Warnings....................................................................................16
4.2 Mandatory Installation Practices ..............................................................16
4.3 Mechanical Installation Information..........................................................17
4.4 Electrical Installation Information .............................................................20
5 COMMISSIONING AND CALIBRATION .........................................................28
5.1 Earth Leakage .........................................................................................28
5.2 Earth Continuity.......................................................................................28
5.3 Insulation test ..........................................................................................28
5.4 Over Current / Motor Overload Current Injection......................................28
5.5 Short Circuit Current Injection..................................................................28
5.6 Current Detection in CTs .........................................................................28
5.7 Main Contactor Fail (MCF).......................................................................29
5.8 Voltage Measurement..............................................................................29
5.9 RS485 Interface.......................................................................................29
5.10 RTM (if Installed) ...................................................................................29
5.11 Lock, Reset, Aux, Ex-Stop, Ex-Start & MCI Inputs.................................29
6 EARTH PROTECTION FUNCTIONS..............................................................30
6.1 Earth Leakage .........................................................................................30
6.2 Insulation Test .........................................................................................31
6.3 Earth Continuity.......................................................................................34
7 CURRENT RELATED FUNCTIONS................................................................36
7.1 Overload Protection.................................................................................37
7.2 Short Circuit Protection............................................................................38
7.3 Phase Current Balance............................................................................38
7.4 Residual Current Signal...........................................................................39

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7.5 Undercurrent Trip.....................................................................................39
8 VOLTAGE RELATED FUNCTIONS ................................................................40
8.1 Main Contactor Fail Protection.................................................................40
8.2 Undervoltage Trip....................................................................................40
8.3 Voltage Metering......................................................................................41
9 MACHINE COMMUNICATION........................................................................42
9.1 Remote Termination Module....................................................................42
9.2 Machine Type Codes...............................................................................42
9.3 Machine Type Number.............................................................................42
10 FAN BURP FUNCTION.................................................................................43
11 PUMP SNORE FUNCTION...........................................................................43
11.1 Basic Operation.....................................................................................43
11.2 Setup Procedure for Snore Function......................................................44
12 PRODUCT OPERATION...............................................................................45
12.1 Basic Display Operation.........................................................................45
12.2 Trip/Status Messages............................................................................46
12.3 Last Trip Status Messages.....................................................................48
12.4 Communications....................................................................................49
12.5 Remote IPM Control ..............................................................................50
12.6 System Control......................................................................................53
12.7 Analogue Output....................................................................................55
12.8 IPM Alarm Functions..............................................................................55
12.9 Event Log ..............................................................................................56
12.10 Time and Date.....................................................................................57
13 USER ADJUSTABLE SETTINGS..................................................................58
13.1 Parameter Groups.................................................................................58
13.2 Changing Settings .................................................................................60
14 SERVICE, MAINTENANCE & DISPOSAL.....................................................61
14.1 Equipment Service.................................................................................61
14.2 Equipment Maintenance ........................................................................62
14.3 Disposal.................................................................................................62
15 SPECIFICATIONS ........................................................................................63
16 EQUIPMENT LIST ........................................................................................64
APPENDIX 1: IPM Earth Leakage Tripping Curves............................................65
Tripping Curves for Instantaneous Trip Time Setting.....................................65
Tripping Curves for 25mA Trip Level Setting..................................................65
APPENDIX 2: IPM Full Load Current Selection Table (100:1 CT) ......................66

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APPENDIX 3: IPM Full Load Current Selection Table (1000:1 CT) ....................67
APPENDIX 4: IPM Menu Structure.....................................................................68
APPENDIX 5: IPM Modbus Address Table ........................................................70
APPENDIX 6: Drawings .....................................................................................74

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TABLE OF FIGURES
Figure 3.1: IPM Integrated Protection Relay................................................................................11
Figure 3.2: IPM Block Diagram ...................................................................................................12
Figure 3.3: Insulation Test Module..............................................................................................14
Figure 3.4: Phase Current Transformers.....................................................................................14
Figure 3.5: Earth Leakage Toroid................................................................................................15
Figure 3.6: Remote Termination Module.....................................................................................15
Figure 4.1: IPM Relay Dimensions..............................................................................................17
Figure 4.2: IPM Relay Rear Panel Details...................................................................................18
Figure 4.3: Current Transformer 45mm I.D. (Part: 101272) Dimensional Details.........................18
Figure 4.4: Current Transformer 88mm I.D. (Part: 101703) Dimensional Details.........................19
Figure 4.5: RTM Dimensions ......................................................................................................19
Figure 4.6: IPM Connection Block Diagram.................................................................................20
Figure 4.7: IPM Relay Electrical Connections: Digital Inputs.......................................................21
Figure 4.8: IPM Relay Electrical Connections: Phase Current Transformers...............................22
Figure 4.9: IPM Relay Electrical Connections: Earth Leakage Toroid .........................................23
Figure 4.10: IPM Relay Electrical Connections: Earth Leakage Toroid........................................24
Figure 4.11: IPM Relay Electrical Connections: ITM ...................................................................25
Figure 4.12: IPM Relay Electrical Connections: RS485 Connections..........................................25
Figure 4.13: IPM Relay Electrical Connections: Analogue Output...............................................26
Figure 4.14: IPM Relay Electrical Connections: Output Relays...................................................26
Figure 4.15: IPM Relay Electrical Connections: Power Supply....................................................27
Figure 6.1: AS/NZS 4871 Safe Touch Potential Levels (Figure C1 from the standard)................30
Figure 6.2: Instantaneous trip times for a selection of device trip level settings...........................31
Figure 6.3: ITM Insulation Test Connections...............................................................................32
Figure 6.4: Earth Continuity Connections....................................................................................34
Figure 7.1: IPM Phase CT Connections......................................................................................36
Figure 8.1: IPM Voltage Monitoring Connections........................................................................40
Figure 12.1: IPM Relay Fascia and Display.................................................................................45

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TABLE OF TABLES
Table 1: Pre-set Resistance and Alarm Thresholds ....................................................................32
Table 2: Status Indication............................................................................................................45
Table 3: Trip/Status Message.....................................................................................................46
Table 4: Last Trip Messages.......................................................................................................48
Table 5: Modbus Commands......................................................................................................49
Table 6: Modbus Exception.........................................................................................................49
Table 7: Modbus Status..............................................................................................................50
Table 8: Events...........................................................................................................................56
Table 9: User Adjustable Settings...............................................................................................58
Table 10: User Adjustable Settings.............................................................................................59

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1 SAFETY AND OTHER WARNINGS
For safety reasons, the relay must be installed, operated and serviced only by competent personnel.
Please read and understand this instruction manual completely before installing, operating or servicing
this equipment. Failure to install or operate this instrument in accordance with the instructions contained
in this manual may create hazardous operating conditions.
1.1 Safe Use of Equipment
The equipment supplied has been designed and manufactured to ensure safe operation. The equipment
must only be used within the design parameters.
The instructions within this manual must be observed as an aid towards achieving the safest possible
installation.
Persons responsible for installation, maintenance, or operation, must observe the following
instructions:
1.1.1 Changes to Equipment
Changes in the design and modifications to the equipment are not permitted. Unauthorised changes
made to the hardware or operating firmware will void the manufacturer's warranty, and may
compromise the integrity of the system into which it is installed and other connected equipment.
1.1.2 Equipment Knowledge
Experience with, or understanding of, this equipment is essential for the safe installation and removal of
the equipment. Therefore, please read and understand this manual prior to use. Competency based
training courses are recommended and are available on request.
1.1.3 Manual Handling
Precautions have been taken to ensure all equipment is safe to handle and free from sharp edges.
However, care should always be taken when handling enclosures and gloves should be worn.
1.1.4 Installation
Correct operation and safety depend on the relay and associated equipment being installed correctly.
Mechanical and or electrical installation and maintenance of plant and equipment must only be carried
out by appropriately qualified personnel and must be tested thoroughly prior to operation.
1.1.5 Operation
As safety depends on the relay functioning correctly it is highly recommended that all safety functions
of the relay be periodically tested to ensure correct operation.

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2 RECEIVING AND STORAGE
2.1 Receiving
All possible precautions are taken to protect the equipment against damage or losses during shipment,
however before accepting delivery, check all items against the packing list or bill of loading. If there is
evidence of physical damage, notify Ampcontrol immediately.
Notify Ampcontrol immediately in case of any discrepancies to the packing list. Keep a record of any
claims and correspondence. Photographs are recommended.
Where practicable do not remove protective covers prior to installation unless there are indications of
damage. Boxes opened for inspection and inventory should be carefully repacked to ensure protection of
the contents or else the parts should be packaged and stored in a safe place. Examine all packing
boxes, wrappings and covers for items attached to them, retain and store any approval documentation
for your safety file as applicable prior to wrapping being discarded.
2.2 Inspection
Equipment that is found to be damaged or has been modified away from its published specification must
not be used. Please contact Ampcontrol if the equipment is suspected to be different than that ordered or
if it does not match the published specifications.
2.3 Storage after Delivery
When the equipment is not to be installed immediately, proper storage is important to ensure protection
of equipment and validity of warranty.
All equipment should be stored indoors between 0-40˚C, preferably on shelves and protected from
moisture and sunlight.
2.4 Unpacking of Equipment
The method of packing used will depend on the size and quantity of the equipment. The following
cautions should be interpreted as appropriate.
CAUTION!
Take care when unpacking crates as the
contents may have shifted during transport.
ENVIRO
The disposal of packaging materials, replaced parts, or components
must comply with environmental restrictions without polluting the soil,
air or water.
Ensure that any timber and cardboard used as packaging is disposed
of in a safe and environmentally responsible manner.
Where possible, dispose of all waste products i.e. oils, metals, plastic
and rubber products by using an approved recycling service centre.

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3 PRODUCT OVERVIEW
3.1 IPM V2 Relay
The Ampcontrol IPM V2 Integrated Protection Relay is an intelligent protection relay based on
microprocessor technology. The IPM Integrated Relay provides the necessary functions required for
protecting electrical outlets supplying underground mining machinery, powered by reeling or trailing
cables, in the metalliferous industry. The relay can also be used to provide optimum overload protection
of motors used on conveyors, pumps, fans and compressors. All of the protection functions are
combined into a compact, plug-in unit, which can be easily changed out to minimise down time in the
event of a problem with the relay.
The IPM provides protection and control functions for:
Earth Leakage
Earth Continuity
Insulation Testing
Contactor Fail
Under Voltage
Overcurrent
Short Circuit
Under Current (Pump Snore Protection)
Fan “Burp” Control
The IPM Integrated Protection Relay can provide Machine Data Transfer through the use of a Remote
Termination Module (RTM) connected between the pilot and earth at the machine end of the trailing
cable. Through the use of the RTM Remote Termination Module the relay parameters are automatically
uploaded from a remote machine when a cable is inserted into a power outlet. The RTM also allows for
remote control (starting) of the IPM output.
Figure 3.1: IPM Integrated Protection Relay

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A RS485 Modbus communication port is available that can be connected to a PLC or a central
monitoring system for continuous monitoring and fault-finding.
The IPM Relay provides an isolated 4-20mA analogue output that can be configured to continuously
represent Average Current, Overload, Earth Leakage and the Insulation level of the relay.
The IPM Integration Protection Relay has 6 digital inputs (Lock, Reset, Aux, Ex-Stop, Ex-Start and MCI),
which feed into a microprocessor unit to be interpreted. The microprocessor has been programmed to
control three output relays, MCR (Main Contactor Relay), CBR (Circuit Breaker Relay) and ALM (Alarm
Relay).
All of the tripping logic and outlet control is performed by the microprocessor, so that virtually no external
control is required.
A four-line 20 character backlit LCD display combined with a keypad provides an easy to operate user
interface. The display provides easy access to all available information. A simple procedure allows
adjustment of the relay‟s settings.
Figure 3.2: IPM Block Diagram
M
RS485
Comms
Device
RTM
(Optional)
4-20mA
Analogue
Receiver
Phase CT
Phase CT
EL Toroid
External
Communications
Device (e.g. PLC)
Pilot
Diode
(Alternative)
To Outlet Contactor
Pilot Termination
CBR Output Relay
MCR Output Relay 1
Phase CT
ITM
IPM
Relay
Alarm Output Relay
MCR Output Relay 2
External
Digital
Inputs
24V AC/DC
Power
Supply

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3.1.1 Earth Leakage Protection
The IPM monitors the outlet‟s earth leakage current through the use of an approved core balance
toroid. A Residual Current Device (RCD) operating characteristic is provided with adjustable trip
sensitivity and time delay. When a trip is initiated, the IPM will open its MCR output relay, opening the
outlet‟s contactor.
For detailed information on the operation of the Earth Leakage protection function, refer to Section 6.1.
3.1.2 Earth Continuity Protection
The Earth Continuity function tests for the continuity of the earthing between the outlet and the
machine, via the pilot core in the trailing cable. The pilot core is also used to transfer data when a
Remote Termination Module (RTM) is used to achieve machine communication.
For detailed information on the operation of the Earth Continuity protection function, refer to Section
6.3.
3.1.3 Insulation Testing
The insulation testing function tests the resistance of the 3 phase lines to earth by applying a high
voltage DC signal to the phase conductors, via the Insulation Test Module (ITM). This test is initiated
once all starting conditions are met.
If the result of the Insulation Test is above the pre-set resistance level, the IPM‟s MCR relay energises,
which in turn closes the main contactor. A manual “Insulation Test” is also provided as a
maintenance/fault finding tool. (When this test is performed the MCR relay does not close at completion
of a healthy test). The Insulation Test allows cable insulation levels to be trended as an aid to
preventative maintenance.
For detailed information on the operation of the Earth Fault Lockout protection function, refer to Section
6.2.
3.1.4 Frozen / Failed Contactor Protection
The IPM relay provides failed contactor protection, initiating a back-trip to an upstream circuit breaker if
the contactor is deemed to have failed to open when required. The position of outlet‟s contactor is
monitored via the Main Contactor Input (MCI). The state of the contactor is then compared to the state
of the IPM‟s output relay. If the contactor is closed whilst the MCR is in the open position, a failed
contactor trip will be initiated.
The IPM also monitors the voltage on the load side of the outlet‟s contactor, via the ITM module, whilst
the contactor is in the open position. If this voltage exceeds 10% of the rated line voltage, a failed
contactor trip will be initiated. When a trip is initiated, the IPM will open its CBR output relay, opening
the upstream circuit breaker.
For detailed information on the operation of the Frozen/Failed Contactor protection function, refer to
Section 8.1.
3.1.5 Overcurrent / Overload Protection
The IPM relay monitors the outlet phase currents via three current transformers (CTs). The measured
current allows the IPM to implement overcurrent, thermal motor overload and phase imbalance
protection. When a trip is initiated, the IPM will open its MCR output relay, opening the outlet‟s
contactor.
For detailed information on the operation of the Overcurrent and Overload protection functions, refer to
Section 0.
3.1.6 Short Circuit Protection
In addition to the overload protection functions, the IPM relay uses the currents measured from the
three phase CTs to provide short circuit protection. The IPM opens its CBR output when a short circuit

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trip is initiated. In typical installations the CBR output is used to trip a circuit breaker upstream from the
outlet‟s contactor.
For detailed information on the operation of the Short Circuit protection function, refer to Section 7.2.
3.1.7 Pump Snore Function
The IPM relay has a Pump Snore function that provides additional control functionality for pump
installations. The Snore function automatically stops the output upon detection of a low current
condition, avoiding damage to the pump components due to overheating. The outlet will be restarted
after a fixed or automatically adjustable time delay.
For detailed information on the operation of the Pump Snore function, refer to Section 11.
3.1.8 Fan Burp Function
The IPM relay has a Fan Burp function that provides additional control functionality for fan installations.
The Burp function allows for the progressive inflation of ventilation bags (tubes) by pulsing the motor
contactor controlling a ventilation fan, several times at start-up.
For detailed information on the operation of the Fan Burp function, refer to Section 10.
3.2 Accessories
The IPM relay requires a number of accessories to perform its protection functions. These accessories
will be introduced in the following subsections. Some accessories are marked as optional and are not
required for the IPM to perform its basic protection functions. Purchasing these optional items will,
however, expand the capabilities of the installation.
3.2.1 Insulation Test Module (ITM)
The IPM is connected to the outlet‟s phase conductors via a high
impedance Insulation Test Module (ITM). This allows the IPM to perform a
high voltage DC insulation test prior to the closing of the outlet‟s contactor.
The IPM also uses the ITM to monitor the magnitude of the phase
voltages. This is used during the frozen contactor testing to ensure that
when the outlet‟s contactor opens, voltage is removed from the outlet. The
ITM is available in a 415V model or a 1kV model.
3.2.2 Phase Current
Transformers (CTs)
The IPM relay measures the
phase currents from all three of the outlet‟s phases. Using
these measured current values, the IPM is able to implement
its overload and short circuit protections functions. The IPM
requires three (3) current transformers to measure the phase
currents. The phase current transformers are available in two
standard sizes: 45mm inner diameter (1000:1 & 500:5) and
88mm inner diameter (1000:1 only). The current transformers
are panel mounted units.
Figure 3.4: Phase Current Transformers
Figure 3.3: Insulation
Test Module

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3.2.3 Earth Leakage Toroid
The IPM requires a summation toroid to be installed around the outlet‟s
three phase conductors. This toroid allows the IPM to measure the
magnitude of outlet‟s earth leakage current. Only one (1) earth leakage
toroid is required per IPM. The IPM‟s earth leakage toroids are 1000:1 and
have an 88mm inner diameter.
3.2.4 Remote Termination
Module (RTM) (Optional)
The RTM is an optional component in the IPM system. It is
used to terminate the pilot cable in the motor enclosure
instead of a diode. When used, the RTM stores the IPM‟s
Group 2 protection settings for that particular motor. This
means that the cable supplying the motor can be moved to
another outlet without the need to re-configure all of the
IPM‟s protection settings. The RTM also offers a remote
start input.
Figure 3.5: Earth
Leakage Toroid
Figure 3.6: Remote Termination Module

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4 INSTALLATION
4.1 General Warnings
These instructions have been designed to assist users of the relay with installation.
Before the relay can be installed, there are a number of things that need to be considered and
understood to prevent incorrect or unsafe operation of the relay or the system into which it is installed.
Along with relevant competence, and an understanding of the target application, the following points
should be considered.
4.1.1 Ensure that the information provided in this user manual is fully understood.
It is extremely important that the limitations and functionality of the relay are understood to prevent
incorrect installation and use from creating a potentially dangerous risk. If in doubt as to the nature of
the limitations or their implication, consult a competent authority such as a supervisor or Ampcontrol
technical representative.
4.1.2 Ensure that the application into which the relay is being installed has been
properly defined, designed and approved.
Any system intended to mitigate the risk of injury needs to be properly designed and implemented.
Such a system must be the result of structured risk analysis with the outcomes used to define the
system requirements. These requirements, in turn, will guide the choice of instrumentation, logic
solvers and actuators needed to implement the system. Understanding the needs of the system will
ensure proper selection of equipment.
4.1.3 Ensure that the relay will properly perform the required functions within the
system design.
It is important to understand how the relay is intended to interact with other equipment within a system.
For safe and reliable use, it is crucial that neither the relays logical operation nor its signalling be
compromised by incompatibilities with connected equipment.
4.1.4 Modifications of any form to the relay or accessories are prohibited.
The relay, as supplied, has been designed and manufactured to comply with the requirements of
protection standards. If modifications of any form are made to the relay, the equipment may no longer
be fit for use. If any modifications or damage to the relay is evident, do not use the equipment and
contact Ampcontrol for advice.
4.2 Mandatory Installation Practices
The following information must be adhered to when installing the relay. Failure to adhere to this
information may give rise to unsafe operation.
Using the relay in a manner that exceeds its electrical, functional or physical specifications, or in a way
that is contrary to its operating restrictions, may create risks to personnel and/or equipment resulting in
injury or death.
The relay must be powered within the specified voltage range.
The installation of the relay must be carried out by suitably trained and qualified personnel.
Identification labels fixed to the relay must not be damaged, removed or covered.
The installation is to be in accordance with the relevant installation Standards/Codes of Practice.
Modifications must not be made to any part of the relay. As supplied, the unit is built to, and
complies with the relevant standards. Modifications to its construction will render the unit non-
compliant.
Complete and accurate records of the installation must be kept as part of the site installation.

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4.3 Mechanical Installation Information
4.3.1 IPM V2 Integrated Protection Relay
The IPM relay is a panel mounted relay that requires a 135mm x 135mm square cut out.
There are four mounting brackets and four M5 screws that are supplied with the relay. These brackets
slide into the side of the relay after it has been inserted into the cut out. The screws are inserted into
the bracket and tightened to secure the IPM to the panel.
Figure 4.1: IPM Relay Dimensions

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IPM V2 USER MANUAL
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Figure 4.2: IPM Relay Rear Panel Details
4.3.2 Phase Current Transformers (CTs) & EL Toroid
The IPM uses 1000:1 or 500:5 current transformers to monitor the phase current of the outlet.
The IPM uses a 1000:1 current transformer installed around all three phases to monitor the earth
leakage current of the outlet.
These current transformers are panel mounted.
Figure 4.3: Current Transformer 45mm I.D. (Part: 101272) Dimensional Details
132
132

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IPM V2 USER MANUAL
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Figure 4.4: Current Transformer 88mm I.D. (Part: 101703) Dimensional Details
4.3.3 Remote Termination Module (RTM)
Figure 4.5: RTM Dimensions

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IPM V2 USER MANUAL
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4.4 Electrical Installation Information
The IPM relay provides several protection functions and, due to this, has a number of different types of
electrical connections. This section will provide details on the wiring and terminations for each of these
different types of connections.
The following sub-sections are arranged as per the terminal numbering on the rear of the unit (refer to
Figure 4.2 for terminal arrangement).
For an alternate representation of the wiring for the IPM, refer to drawing IPM2E002 in APPENDIX 6:
Drawings.
Figure 4.6: IPM Connection Block Diagram
M
RS485
Comms
Device
RTM
(Optional)
4-20mA
Analogue
Receiver
Phase CT
Phase CT
EL Toroid
External
Communications
Device (e.g. PLC)
Pilot
Diode
(Alternative)
To Outlet Contactor
Pilot Termination
CBR Output Relay
MCR Output Relay 1
Phase CT
ITM
IPM
Relay
Alarm Output Relay
MCR Output Relay 2
External
Digital
Inputs
24V AC/DC
Power
Supply