Cortalk RMU5 Generic Operator's manual

MOBILTEX® DATA LTD.
TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
DOCUMENT NO.:
RMU5-MAN-001
SHEET: 1 of 69
REV: 1.10
RMU5 Generic
Installation and Configuration Guide
Print Date:
December 15, 2016

MOBILTEX® DATA LTD.
TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
DOCUMENT NO.:
RMU5-MAN-001
SHEET: 2 of 69
REV: 1.10
RESTRICTED PROPRIETARY INFORMATION
This information disclosed herein is the exclusive property of Mobiltex®Data Ltd. and is not to be disclosed without the
written consent of Mobiltex®Data Ltd. No part of this publication may be reproduced or transmitted in any form or by
any means including electronic storage, reproduction, execution or transmission without the prior written consent of
Mobiltex®Data Ltd. The recipient of this document by its retention and use, agrees to respect the security status of the
information contained herein.
This document is intended for limited circulation.
The information contained in this document is subject to change without notice and should not be construed as a
commitment by Mobiltex®Data Ltd. unless such commitment is expressly given in a covering document.
© Copyright Mobiltex®Data Ltd. (2016)
CURRENT REVISION APPROVALS (Revision 1.10)
Name
Location
Job Function
Signature
Date
Tony da Costa
Calgary
Author, Engineering Manager
Jerry Chilibecki
Calgary
Engineering Director
REVISION HISTORY
Rev
Start
Date
Approval
Date
Description
Prepared By
Draft
0.01
Oct 2, 2007
First Draft
Tony da Costa
Draft
0.02
Oct 18, 2007
Added DRI1 board information. Minor edits.
Tony da Costa
Draft
0.03
Feb 15, 2008
Added changes for isolated analog board. Added additional MODBUS register
information.
Tony da Costa
Draft
0.04
June 12, 2008
Changed installation diagram to reflect INT+/INT- labeling on overlay.
Tony da Costa
Draft
0.05
Oct 10, 2008
Added changes for pre-calibrated AIO1 boards. Added information on Skywave
IsatM2M satellite transceiver.
Tony da Costa
1.00
Jan 30, 2009
Original production release. Updated branding.
Tony da Costa
1.01
Apr 22, 2009
Formatting to match other corTalk documentation. New driver/app install
procedure. Deleted RMU5-ISAT installation procedure, and added reference to
RMU5-MAN-002 in its place.
Tony da Costa
1.02
Jun 16, 2009
Added general safety section. Updated Easytrack installation section. Updated
general installation section.
Tony da Costa
1.03
Oct 23, 2009
Added repeat daily interruption schedule information. Updated configuration
application screen shots.
Tony da Costa
1.04
Jan 27, 2009
Updated with firmware v1.15 changes. Updated configuration application screen
shots. Added cellular GSM transceiver information. Updated MODBUS register
reference table for fixed-point operation mode.
Tony da Costa
1.05
April 12, 2010
Updating the document with several CSA requirements identical to the ISAT manual
Brian Dewald
Tony da Costa
Jerry Chilibecki
1.06
Nov 7, 2011
Nov 17, 2011
Update pictures. Added descriptions of new communications modes. Fixed polarity
on sample rectifier wiring diagram.
Jennifer Scott
Tony da Costa
1.07
July 19, 2013
Added TT3027 and DRI3 information.
Tony da Costa
1.08
June 10, 2014
Added IsatDataPro transceiver information.
Tony da Costa
1.09
Jan 20, 2015
Updated three-phase relay picture.
Updated specifications.
Tony da Costa
1.10
Dec 15, 2016
Updated cellular transceiver descriptions.
Tony da Costa

MOBILTEX® DATA LTD.
TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
DOCUMENT NO.:
RMU5-MAN-001
SHEET: 3 of 69
REV: 1.10
Contents
1Introduction .............................................................................................................................................................. 6
2General Safety Information ......................................................................................................................................7
3Component Identification and Descriptions .............................................................................................................8
4Installation.............................................................................................................................................................. 12
4.1 Mounting ........................................................................................................................................................ 12
4.2 Wiring............................................................................................................................................................. 13
4.2.1 Protective Earthing ................................................................................................................................. 13
4.2.2 Power Transformer ................................................................................................................................. 13
4.2.3 GPS Antenna .......................................................................................................................................... 14
4.2.4 Measurement Wiring .............................................................................................................................. 15
4.2.5 Interruption Relay Wiring....................................................................................................................... 17
4.2.5.1 AC Solid State Relays......................................................................................................................... 19
4.2.5.2 AC Solid State Relay Heatsinks ......................................................................................................... 20
4.2.5.3 Mercury Displacement Relays............................................................................................................ 21
4.2.6 Door Switch Wiring................................................................................................................................ 22
5Configuration.......................................................................................................................................................... 23
5.1 Software Installation....................................................................................................................................... 23
5.1.1 Configuration Application Software....................................................................................................... 23
5.1.2 USB Driver.............................................................................................................................................26
5.2 RMUSetup Application .................................................................................................................................. 29
5.2.1 RMU Configuration................................................................................................................................ 30
5.2.1.1 System Configuration Properties ........................................................................................................32
5.2.1.2 Ethernet Configuration Properties ...................................................................................................... 34
5.2.1.3 RS-232 Port Properties .......................................................................................................................35
5.2.1.4 Instrumentation Port (Sensor Bus) Properties..................................................................................... 36
5.2.1.5 RS-485/MODBUS Port Properties ..................................................................................................... 36
5.2.1.6 Bluetooth Port Properties.................................................................................................................... 38
5.2.1.7 Interrupter Properties..........................................................................................................................39
5.2.1.8 Accounts Parameters........................................................................................................................... 41
5.2.1.9 I/O Points Parameters ......................................................................................................................... 41
5.2.2 System Control ....................................................................................................................................... 45
5.2.3 General Status......................................................................................................................................... 45
5.2.4 Rectifier/Interrupter ................................................................................................................................ 46
5.2.5 Radio Communications........................................................................................................................... 46
5.2.6 Retrieve Logs..........................................................................................................................................46
6Operation................................................................................................................................................................ 47
6.1 Communications Modes ................................................................................................................................. 47
6.1.1 RS-485 MODBUS Slave ........................................................................................................................ 47
6.1.2 RS-232 MODBUS Slave ........................................................................................................................ 47
6.1.3 Ethernet MODBUS Slave....................................................................................................................... 47
6.1.4 PSTN Dial-up Modem............................................................................................................................ 47
6.1.5 MSK Radio Modem................................................................................................................................ 47
6.1.6 Iridium Satellite ......................................................................................................................................47
6.1.7 Skywave IsatM2M Satellite....................................................................................................................48
6.1.8 Skywave IsatDataPro Satellite................................................................................................................ 48
6.1.9 Cellular GSM SMS................................................................................................................................. 49
6.1.10 Inmarsat C (EasyTrack/Sailor) Satellite ................................................................................................. 50
6.1.10.1 Easytrack TT-3026 Antenna........................................................................................................... 50
6.1.10.2 Sailor 3027 Antenna ....................................................................................................................... 52
6.1.10.3 Satellite Service .............................................................................................................................. 54
6.2 Ethernet Services ............................................................................................................................................ 57
6.2.1 Web Server .............................................................................................................................................57
6.2.2 FTP Server.............................................................................................................................................. 58
6.2.3 Telnet Server........................................................................................................................................... 58
6.2.4 RMUSetup.............................................................................................................................................. 58
6.3 LCD Display................................................................................................................................................... 58

MOBILTEX® DATA LTD.
TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
DOCUMENT NO.:
RMU5-MAN-001
SHEET: 4 of 69
REV: 1.10
6.4 System Shutdown ...........................................................................................................................................59
7Servicing................................................................................................................................................................. 60
A. User Accessible Connector Pin Outs..................................................................................................................61
B. MODBUS Register Reference............................................................................................................................ 65
C. Specifications...................................................................................................................................................... 68
Figures
Figure 1 RMU5 Front/Side View .....................................................................................................................................8
Figure 2 RMU5 Back/Side View......................................................................................................................................9
Figure 3 RMU5 Inside View ..........................................................................................................................................11
Figure 4 RMU5 Mounting Plate Dimensions.................................................................................................................12
Figure 5 Class 2 Transformers Available From Mobiltex .............................................................................................. 13
Figure 6 RMU5 Power Connection ................................................................................................................................ 14
Figure 7 GPS Synchronization Kit ................................................................................................................................. 15
Figure 8 RMU5 Typical Rectifier Installation................................................................................................................16
Figure 9 Mechanical and Mercury Displacement Relay Installation.............................................................................. 18
Figure 10 AC Solid State Triac Relay Installation ......................................................................................................... 18
Figure 11 DC Solid State MOSFET Relay Installation..................................................................................................19
Figure 12 Mobiltex Standard Single Phase Solid State AC Relays................................................................................19
Figure 13 Mobiltex Standard Three Phase AC Solid State Relay ..................................................................................20
Figure 14 X030120HE54 Medium Heatsink .................................................................................................................. 20
Figure 15 X030320HE90 Large Heatsink ...................................................................................................................... 21
Figure 16 K07111NC12D 100A Mercury Displacement Relay.....................................................................................22
Figure 17 Door Switch Wiring ....................................................................................................................................... 22
Figure 18 RMU2Installer Dialog....................................................................................................................................23
Figure 19 RMU5ConfigSetup.msi Security Warning Dialog.........................................................................................24
Figure 20 RMU5 Configuration Applications Installation Dialog ................................................................................. 24
Figure 21 RMU5 Configuration Installation Option Selection....................................................................................... 25
Figure 22 RMU5 Configuration Applications Installation Complete............................................................................. 25
Figure 23 Driver Installation Wait Dialog...................................................................................................................... 26
Figure 24RMU5 Driver Code Signing Warning Dialog................................................................................................. 26
Figure 25 RMU5 Driver Installation Complete Dialog .................................................................................................. 26
Figure 26 Windows XP Found New Hardware Dialog #1 ............................................................................................. 27
Figure 27 Windows XP Found New Hardware Dialog #2 ............................................................................................. 27
Figure 28 Windows XP Found New Hardware Dialog #3 ............................................................................................. 28
Figure 29 Windows XP Found New Hardware Dialog #4 ............................................................................................. 28
Figure 30 Configuration Application Main Screen At Startup ....................................................................................... 29
Figure 31 Connect Password Dialog .............................................................................................................................. 29
Figure 32 Configuration Application Main Screen Connected ......................................................................................30
Figure 33 RMU5 Configuration -- System Properties.................................................................................................... 32
Figure 34 RMU5 Configuration -- Ethernet Properties.................................................................................................. 34
Figure 35 RMU5 Configuration -- Communications Expansion Port Properties ........................................................... 35
Figure 36 RMU5 Configuration –Instrumentation Sensor Expansion Bus Properties ..................................................36
Figure 37 RMU5 Configuration –RS-485/MODBUS Port Properties .......................................................................... 37
Figure 38 RMU5 Configuration –Bluetooth Properties................................................................................................. 38
Figure 39 RMU5 Configuration –Rectifier Interrupter Properties ................................................................................ 39
Figure 40 RMU5 Configuration –User Accounts Properties.........................................................................................41
Figure 41 RMU5 Configuration –I/O Points Properties................................................................................................ 42
Figure 42 RMUSetup General Status Read Inputs Dialog ............................................................................................. 45
Figure 43 Skywave DMR-800 Transceiver....................................................................................................................48
Figure 44 Skywave IDP-680 Transceiver....................................................................................................................... 49
Figure 45 GTX2 GSM/GTX3 UMTS/GTX3 LTE Cellular Transceiver........................................................................ 49
Figure 46 Thrane&Thrane Easytrack TT-3026 Communicator and Cable..................................................................... 50
Figure 47 TT-3026 Adjustable Pole/Railing Mount Kit................................................................................................. 50
Figure 48 TT-3026 Cable Termination........................................................................................................................... 51
Figure 49 TT-3026 Cable Plugged Into DRI1................................................................................................................ 51
Figure 50 Cobham Sailor 3027 Communicator and Cable............................................................................................. 52

MOBILTEX® DATA LTD.
TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
DOCUMENT NO.:
RMU5-MAN-001
SHEET: 5 of 69
REV: 1.10
Figure 51 Sailor 3027 Adjustable Pole/Railing Mount Kit............................................................................................. 52
Figure 52 Sailor 3027 Cable Termination ......................................................................................................................53
Figure 53 Sailor 3027 Cable Plugged Into DRI3............................................................................................................53
Figure 54 Inmarsat C Satellite Coverage........................................................................................................................54
Figure 55 Easytrack Communications Status ................................................................................................................. 55
Figure 56 RMU5 Web Server Page................................................................................................................................ 57
Figure 57 LCD Display Page 1, Main Status.................................................................................................................. 58
Figure 58 LCD Display Page 2, Copyright and OS/Application Versions..................................................................... 58
Figure 59 LCD Display Page 3, Real Time Clock, IP Address, and ESN...................................................................... 58
Figure 60 LCD Display Pages 4-17, Readings...............................................................................................................59
Figure 61 LCD Display Page 18, Timing Control Module Details ................................................................................59
Figure 62 LCD Display Page 19, System Faults ............................................................................................................ 59
Figure 63 LCD Display Page 20, System Firmware Versions........................................................................................ 59
Figure 64 LCD Display Page 21, RS-232 Port Info .......................................................................................................59
Tables
Table 1 Relay Types Pros/Cons...................................................................................................................................... 17
Table 2 Mercury Displacement Relay Contact De-rating............................................................................................... 22
Table 3 Main I/O Connector Pinout ............................................................................................................................... 61
Table 4 Communications Expansion Connector Pinout ................................................................................................. 62
Table 5 Instrumentation Sensor Expansion Bus Connector............................................................................................63
Table 6 Main Power Input Connector............................................................................................................................. 63
Table 7 USB Host Connector ......................................................................................................................................... 63
Table 8 USB Slave Configuration Connector.................................................................................................................64
Table 9 Ethernet 10/100 Connector................................................................................................................................ 64
Table 10 Default RMU5 I/O Point Modbus Addresses .................................................................................................. 66
Table 11 Register Behavior By I/O Point Type For Enabled Points ..............................................................................67

MOBILTEX® DATA LTD.
TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
DOCUMENT NO.:
RMU5-MAN-001
SHEET: 6 of 69
REV: 1.10
1Introduction
The RMU5 is a powerful remote monitoring unit with an optional precision GPS interruption controller for use with
cathodic protection rectifiers. Precise timing accuracy and repeatability is attained with GPS and microprocessor
technology. A small physical size and wide operating temperature range make this device ideally suited for use in a
variety of rectifier cabinets.
The basic RMU5 has the following feature set:
High-performance 200MHz ARM9-based processing platform
64MB RAM
32MB Flash storage for OS and applications
Windows Embedded CE 6.0 operating system
Integral health monitoring of internal voltages and temperature
20x4 character wide-temperature range LCD screen for local status monitoring with no additional equipment
10/100Base-T Ethernet for communications backhaul over various data networks
RS-232 MODBUS interface port for attachment to other SCADA RTUs
USB peripheral with RNDIS characteristics for configuration from a PC
USB host for additional USB flash drive or communications expansion
One digital input capable of dry contact or voltage input (optically isolated)
One ground switched digital output with 750mA sinking capability and 12V power
Four galvanically isolated bi-polar analog input channels configurable for +/-158mV, +/-7.5V, and +/-
150VDC ranges
24VAC/DC main power input, used with external Class 2 power transformer or external DC-DC converter
Battery backup allowing up to 8 hours of operation during main power fail conditions
Easy configuration through a PC-based graphical user interface
Remote configuration through available communications channels
Remote firmware updates over appropriate communications channels
Scheduler for future rectifier interruption cycles
Scheduler for input datalogging
Programmable alarm window capability on all input channels
NEMA 4X, IEC529 Type IP65 enclosure for harsh environments
CSA and UL approvals
Operation in -40°C to +60°C ambient temperatures
The base product can be augmented through the following optional components:
Optional GPS time synchronized rectifier interruption
Internal Flash drive for datalogging storage (128MB to 8GB, factory installed)
Bluetooth communications for configuration and data retrieval
RS-232 communications expansion interface (same physical connector as MODBUS interface listed above)
oIridium SBD satellite modem
oSkywave Inmarsat D satellite modem
oV.34 PSTN modem
o1200/2400 MSK VHF/UHF terrestrial radio modem
oThird-party radio modems
Sensor expansion bus
oGalvanically isolated 4 channel analog input module
oGalvanically isolated 4 channel input + 4 channel output module
oIsolated DC current sensor
oHigh voltage 500V AC analog input module
oExternal temperature sensor
oHigh impedance analog inputs for reference half-cell measurements
oAdditional modules added in the future as required
This document details the installation and operation of the Mobiltex®RMU5 remote monitoring unit product.

MOBILTEX® DATA LTD.
TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
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2General Safety Information
The following safety precautions must be reviewed to avoid injury and prevent damage to this product or any products
connected to it. To avoid potential hazards, use this product only as specified. If the equipment is used in a manner not
specified by the manufacturer, the protection provided by the equipment may be impaired.
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of a larger system. Read the safety sections of the other
components’manuals for warnings and cautions related to operating the system.
To Avoid Fire or Personal Injury
Connect and Disconnect Properly. Do not connect or disconnect terminal wiring while the wires are connected to a
voltage source.
Ground the Product. To avoid electric shock, the protective earth terminal must be connected to earth ground. Before
making connection to the input or output terminals of the product, ensure that the product is properly grounded.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings and markings on the product. Consult
the product manual for further ratings information before making connections to the product. Do not usean input marked
with measurement category I for measurements within measurement categories II, III or IV. Do not connect category II
inputs directly to mains--a Class 2 CSA/UL transformer must be used for isolation.
Do Not Operate Without Covers. Do not operate this product with covers or panels removed.
Avoid Exposed Circuitry. Do not touch exposed connections and components when power is present.
Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified
service personnel.
Do Not Operate in Wet/Damp Conditions.
Keep Internal Product Surfaces Clean and Dry.
Symbols and Terms
Terms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other
property.
Terms on the Product. These terms may appear on the product:
DANGER. Danger indicates an injury hazard immediately accessible as you read the marking.
WARNING. Warning indicates an injury hazard not immediately accessible as you read the marking.
CAUTION. Caution indicates a hazard to property including the product.
Symbols on the Product. The following symbols may appear on the product:
CAUTION
Refer to
Manual
Protective
Ground
(Earth)
Terminal
Functional
Ground
Terminal
AC or DC
Input
This product has been tested to the requirements
of CAN/CSA-C22.2 No. 61010-1, second edition,
including Amendment 1, or a later version of the
same standard incorporating the same level of
testing requirements.

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TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
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3Component Identification and Descriptions
Figure 1 shows the front and right side of the RMU5 enclosure. The important features shown here are the latch and
lock attachment points. To open the RMU5 enclosure, lift the plastic latch arms away from the enclosure body, then
swing the metal straps away from the door. The door should then swing open freely. To close the enclosure, reverse
the procedure.
When the enclosure is mounted external to a rectifier cabinet, it may be desirable or even necessary for satisfying
regulatory requirements, to install a standard padlock on the latches to keep unauthorized users out of the enclosure. To
apply the padlock, knock out the two round plastic pieces on the plastic latch arms, then pass the padlock shackle through
the opening with the latch in a closed position.
Figure 1 RMU5 Front/Side View

MOBILTEX® DATA LTD.
TITLE: RMU5 Generic Installation and Configuration Guide
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Figure 2 shows the back and hinge side of the RMU5. The RMU5 may be mounted against a flat surface by driving
screws through the mounting hole locations shown in the picture. The RMU5 may also be mounted to a pipe using pipe
clamp bands through the slots shown in the picture.
Figure 2 RMU5 Back/Side View
Figure 3 shows the inside of the RMU5, which includes the front panel and bottom connectors. The front panel contains
the following features:
1. Power/Fault LED Indicator. The green indicator shows when the RMU5 is powered, and if flashing red, a fault
condition is present. If main input power is interrupted, the green indicator will flash.
2. GPS/Interrupter Status LED Indicator. This bi-color indicator shows status for the optional GPS Timing
Control Module (TCM) board and also the rectifier interruption relay status. When green, the GPS TCM board

MOBILTEX® DATA LTD.
TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
DOCUMENT NO.:
RMU5-MAN-001
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REV: 1.10
has successfully attained a time lock to the NAVSTAR GPS network. When red, the rectifier output is switched
off (interrupted).
3. Reset/Power Down Button. The reset button may be held down for 10s to force a reset of the hardware on the
RMU5. The button may also be used to disengage the backup UPS battery when main power is removed.
4. Local Configuration USB Slave Port. This port is used for configuration of the RMU5 from a PC running
Microsoft Windows XP SP2 or higher. Further information on its use is located farther in this document.
5. 20 x 4 LCD Display With Backlight. The LCD display shows the current status of the RMU5 through a paged
display system.
6. Up/Down Control Buttons. These buttons control the page being displayed on the 20 x 4 LCD display.
7. Main I/O Connector. This connector is the principle connector for the built-in analog inputs, digital input,
interrupter relay control, and RS-485 MODBUS connections. The functions of each pin are labeled on the
faceplate.
The bottom panel contains the following features:
1. GPS Antenna Connector. This connector is only present if the RMU5 is equipped with the optional internal
GPS Timing Control Module board. Attach a 3V LNA 18dB gain GPS antenna with an SMA male connector-
terminated cable to this port.
2. Sensor Bus Expansion Connector. This port is used to attach additional analog and digital I/O modules to the
RMU5.
3. Communications Expansion Connector. This connector is used to attach RS-232 communications devices such
as digital radios, MODBUS RTUs, PSTN modems, etc. Usually an adapter board will be present according to
the communications device in use.
4. USB Host Expansion Connector. Future use connector.
5. 10/100Base-T Ethernet Connector. Allows attachment to a standard twisted pair Ethernet network.
6. Main Power Input Connector. Attach a DC power source with a voltage rating of 20 to 35V, or an AC power
source with a voltage rating of 20 to 25V to this port. When connecting a DC power source, the connections
to the main power input connector are polarity insensitive. When using an AC power source, ensure that
neither connection to the main power input connector is grounded, otherwise overheating of the RMU5 internal
power supply may result. The power source should be able to deliver at least 40VA to an RMU5 that is
equipped with additional options modules. The basic RMU5 requires approximately 5VA to operate once the
internal battery is charged, and approximately 15VA while the battery is charging (with no external loads).
Wiring may be brought into the RMU5 by drilling a hole in the lower box edge and installing water tight glands or water
proof flexible conduit connectors. When drilling the holes for the feed-through connectors, avoid drilling into the RMU
aluminum chassis.
Any Interconnection wires used must be rated to 75°C or greater.

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Figure 3 RMU5 Inside View

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4Installation
4.1 Mounting
The RMU5 is housed in a weather-proof compact enclosure with a versatile mounting plate. Installation of the device
can be made inside a rectifier cabinet, or externally on a flat surface or pole. Figure 4 shows the dimensions of the
mounting plate, including the location and size of the mounting holes. Any of the available mounting holes may be used
to secure the RMU5 to a flat surface. The RMU5 may also be secured to a pole by utilizing pipe clamps through the
two slots on the top of the mounting plate and the two slots on the bottom of the mounting plate.
Figure 4 RMU5 Mounting Plate Dimensions
Once the RMU5 is attached to its final mounting location, cabling must be brought into the box through waterproof
conduit, or through sealing glands. Installation of the cabling feed-through must be made in such a manner that does
not degrade the environmental sealing characteristics of the RMU5.

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TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
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4.2 Wiring
WARNING: Ensure that any power sources supplying the RMU5 are off while performing any wiring on the
RMU5.
WARNING: Ensure that all wire used for interconnections meets the voltage, current and temperature
requirements for the particular installation site.
4.2.1 Protective Earthing
To avoid electric shock, the protective earth terminal must be connected to earth ground. Before making connection to
the input or output terminals of the product, ensure that the product is properly grounded.
A ring lug pre-terminated #10 green/yellow cable is supplied with the RMU5 for earth ground attachment purposes.
Remove the #10 nut and star washer from the protective earth terminal, place the ring lug of the cable over the stud, then
re-install the star washer and #10 nut. Connect the other end of the cable to a suitable earth ground point.
4.2.2 Power Transformer
An external Class 2 transformer must be installed in the rectifier to provide 24VAC/40VA to the RMU5 for power. The
exact model of transformer is installation dependent due to varying supply voltages feeding rectifiers.
Figure 5 shows various Class 2 transformers that may be supplied by Mobiltex with the RMU5. Mobiltex P/N
T01A42BE5DG can be used with 208V or 240VAC line voltages. Mobiltex P/N T01A420BE2G can be used with
120VAC line voltage. Mobiltex P/N T01A42TR401 can be used with 120V, 208V, or 240VAC lines voltages. Finally,
Mobiltex P/N T01A42TR501 can be used with 120V, 240V, 277V, or 480VAC line voltages.
Many different types of Class 2 transformers are available which are compatible with the RMU5. A transformer with a
20-24VAC/40VA nominal output winding rating should be used with the RMU5. The primary input voltage is
determined by the power system available at the RMU5 installation site. Install the transformer according to the
manufacturer’s instructions and connect the secondary windings to the RMU5 main power input.
Figure 5 Class 2 Transformers Available From Mobiltex
Connect the appropriate primary side taps of the transformer to the L1 and L2/N line input connection points on the
device being monitored. An external switch or circuit-breaker and external overcurrent protection device (sized to the
transformer specifications) should be installed on the primary connections of the transformer and be located near the
RMU5. Consult the documentation provided by the transformer manufacturer to determine the correct primary tap wires
required for a particular input voltage.

MOBILTEX® DATA LTD.
TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
DOCUMENT NO.:
RMU5-MAN-001
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REV: 1.10
Note: When installing transformers with multiple primary taps, ensure that un-used tap wires are properly
capped!
Next, extend the transformer 24VAC secondary wires with additional wire (as needed) to reach the RMU5 power input.
Remove the orange pluggable terminal block from the RMU5, and connect the transformer secondary wires to the
terminal block. Before plugging the terminal block back into the RMU5, enable primary power to the transformer, and
by using a multimeter, verify that the transformer output is within the range of 20 to 28VAC.
If the transformer output voltage is below or above that range, re-verification of the transformer primary tap
selection will be necessary.
Shut off primary power to the transformer before continuing. Plug the orange terminal block back into the receptacle
on the RMU5. The connection to the RMU5 should be as shown in Figure 6.
Figure 6 RMU5 Power Connection
4.2.3 GPS Antenna
The RMU5 GPS kit (P/N A20A03GPS01) is shown in Figure 7. This kit is ordered as a factory installed item. The GPS
board shown is installed inside the RMU5 at time of manufacturing. Included in the kit is a pre-terminated 10 meter
(33’) RF cable and a GPS antenna.

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TITLE: RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
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Figure 7 GPS Synchronization Kit
The RMU5 may be equipped with a GPS receiver to allow for precision synchronized interruption of the rectifier output.
If the RMU5 is equipped with this option, an additional cable for the GPS antenna must be brought into the RMU5
enclosure or attached to the external GPS antenna connector (if conduit is not required). If the external GPS antenna
connector is used, apply self-annealing tape and electrical tape over the GPS antenna connector to seal it against moisture
entry. The GPS antenna must be mounted in an area that has reasonable view of the sky with minimal blockage.
4.2.4 Measurement Wiring
Figure 8 shows a typical wiring installation for the RMU5. If the rectifier interruption feature is utilized, a solid-state
relay should be installed on the primaries of the rectifier transformer to allow the RMU5 to interrupt current flow to the
protected structure. The exact model of relay will be installation dependent and must be appropriately sized to allow for
the power consumption of the rectifier.
The RMU5 may be used to monitor the status of the primary circuit breaker in the rectifier if the circuit breaker is
equipped with monitoring contacts. These contacts may be attached to the DIN pins on the main I/O connector as shown
in the typical installation diagram.
Ensure that main rectifier power is off while performing any wiring on the RMU5.

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TITLE: RMU5 Generic Installation and Configuration Guide
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Figure 8 RMU5 Typical Rectifier Installation

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4.2.5 Interruption Relay Wiring
Wiring of the interruption relay requires some consideration for the type and size of rectifier being interrupted.
Consideration for lightning immunity is another issue that will affect relay type and installation point. Table 1 lists the
most common relay types along with their associated pros and cons.
Relay Type
Pros
Cons
Mechanical
Normally closed contact type
Inexpensive
Short contact life (thousands of cycles)
Low current capacity (<25A)
Contact migration with DC loads
On/off activation times
High control current consumption
Mercury Displacement
Normally closed contact type
Moderate cost
High current capacity
Low power loss (<10W w/100A load)
No heatsink required
Long contact life (millions of cycles)
Good lightning damage-immunity
Environmental concerns
Transportation regulations
Disposal regulations
On/off activation times
High control current consumption
Solid State Triac (AC-only)
Installed on transformer primary
or
Installed on transformer sec. tap
Moderate cost
Good lightning damage-immunity
Fast switching
Low control current
High voltage switching(<=690VAC)
High current switching (<=125A)
Does not require external clamp diodes
No contact degradation over time
Requires heatsink
Large current surge (primary side)
Solid State MOSFET (DC-only)
Installed after rectifier diodes
Least impact on pipeline waveforms
Fast switching
Lower switching surge
Low control current consumption
No contact degradation over time
Expensive
Poor lightning damage-immunity
Requires large heatsink
Requires external clamp diodes
Limited installation points
Maximum voltage/current tradeoff
Table 1 Relay Types Pros/Cons
The following figures show the most common connection methods for each of the relay types when installed on an AC
rectifier. The selected relay must be sized according to specifications from the relay manufacturer.
When using an alternate DC power source, such as thermo-electric generation or solar, only DC capable relays such as
mechanical, mercury displacement, or DC solid state MOSFET can be used on the output to the protected structure.

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Rectifier
Bridge
Mechanical and Mercury Displacement Relay Installation
Rectifier Transformer
Protected
Structure
-
+
~
~
Normally Closed
Mechanical Relay
L1
N/L2
Normally Closed
Mechanical Relay Normally Closed Mechanical Relay
Relay may be installed in any one of the three locations shown
Rectifier Assembly
Note: Some relays are polarity
sensitive on the control coils. In
those cases, ensure that INT- and
INT+ are connected to the
appropriate terminals on the
relays.
Figure 9 Mechanical and Mercury Displacement Relay Installation
AC Solid State Triac Relay Installation
Rectifier Transformer
Protected
Structure
L1
N/L2
Relay may be installed in any one of the two locations shown.
Rectifier Assembly
Normally Open Solid
State Triac Relay
+-
Normally Open Solid
State Triac Relay
+-
Rectifier
Bridge
-
+
~
~
Note: AC solid state Triac relays are
also available in three-phase models
for use on the primary side of the
rectifier transformer with three-phase
line power.
Figure 10 AC Solid State Triac Relay Installation

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DC Solid State MOSFET Relay Installation
Rectifier Transformer
Protected
Structure
L1
N/L2
Relay is polarity sensitive on
both the control input and
contacts.
Flyback protection diode and
transient protection diode
must be selected according to
relay manufacturer’s
specifications.
Rectifier Assembly
Rectifier
Bridge
-
+
~
~
Flyback Protection
Diode
Normally Open DC
Solid State MOSFET
Relay
+-
+-
Transient Protection
Diode
Figure 11 DC Solid State MOSFET Relay Installation
4.2.5.1 AC Solid State Relays
The preferred relay to use in most cases is the AC solid state TRIAC relay on the primary-side of the rectifier transformer.
Mobiltex has several standard AC relays and heatsinks available as optional components for the RMU5.
K0513245010
AC Relay - 24-280 VAC RMS 50 Amps max. 0-8A=No Heatsink, 8-50A=HE-54
K0513211010
AC Relay - 24-280 VAC RMS 110 Amps max. 0-8A=No Heatsink, 8-60A=HE-54, 60-110A=HE-90
K0513285010
AC Relay - 48-530 VAC RMS 50 Amps max. 0-8A=No Heatsink, 8-50A=HE-54
Figure 12 Mobiltex Standard Single Phase Solid State AC Relays
All 3 relays are about the same physical size and look very similar. The heatsink requirements are listed above. These
relays can be used to either interrupt the primary line AC (for 120 & 230 volt rectifiers) or the secondary AC of the
rectifier.
K05232R5016
AC Relay - 3 phase, 48-530 VAC RMS 50 Amps max. 0-4A=No Heatsink, 4-30A=HE-90

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Figure 13 Mobiltex Standard Three Phase AC Solid State Relay
The relay shown in Figure 13 is used to interrupt the primary AC of 3-phase rectifiers.
4.2.5.2 AC Solid State Relay Heatsinks
X030120HE54
Medium Heatsink for Solid State Relay - HE-54
Figure 14 X030120HE54 Medium Heatsink