MRD Rail Technologies EarthLogger EL4+ User manual

EarthLogger EL4+ User Manual
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EarthLogger
User Manual
Model: EL4+

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EarthLogger™ User Manual
The software described in this manual is supplied under a license agreement and may be used only in
accordance with the terms of that agreement.
Publication History
Version
Date
Status
Comment
Author
App’d
0.1
08Jan2014
Withdrawn
CG
RG
0.2
22Apr2014
Withdrawn
CG
RG
0.3
25Sep2014
Withdrawn
CG
RG
0.5
14Oct2016
Withdrawn
Reformatted.
AS
RG
1.04
25Nov2016
Withdrawn
Major re-write. Cloud Server section removed.
AS
RG
1.05
05Sep2018
Withdrawn
Minor changes.
CG
RG
1.06
19Mar2019
Issued
Added default user login details
LH
CG
Copyright Notice
©2016 MRD Rail Technologies Pty Ltd. All rights reserved.
Trademarks
The MRD logo is registered trademark of MRD Rail Technologies Pty Ltd.
All other trademarks or registered marks in this manual belong to their respective holders.
Disclaimer
Information in this document is subject to change without notice and does not represent a commitment on
the part of MRD Rail Technologies Pty Ltd.
MRD provides this document as is, without warranty of any kind, expressed or implied, including, but not
limited to, its particular purpose. MRD reserves the right to make improvements and/or changes to this
manual, or to the products and/or the programs described in this manual, at any time.
Information provided in this manual is intended to be accurate and reliable. However, MRD assumes no
responsibility for its use, or for any infringements on the rights of third parties that may result from its use.
This manual, and the product it relates to, might include unintentional technical or typographical errors.
Changes are periodically made to the information herein to correct such errors, and these changes are
incorporated into new edition of the publication.
Technical Support Contact Information
Tel: [phone]
Fax: [phone]
Email:[email protected]m.au

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Table of Contents
1. INTRODUCTION .................................................................................... 5
2. PRODUCT DESCRIPTION........................................................................ 6
Insulation Monitoring .........................................................................................6
Voltage Monitoring.............................................................................................7
ELDs ....................................................................................................................7
Insulation Resistance- Principle of Measurement ...............................................7
User Authentication............................................................................................7
External Communications/Activations................................................................7
Logging & Uploading ...........................................................................................8
Connectors..........................................................................................................9
Package contents ..............................................................................................10
3. INSTALLATION .................................................................................... 11
Hardware..........................................................................................................11
3.1.1 Hardware installation................................................................................. 11
3.1.2 Product Dimensions ................................................................................... 11
3.1.3 Panel Mount Hole Spacing ......................................................................... 11
Electrical Installation.........................................................................................12
3.2.1 Basic Electrical Connections....................................................................... 12
3.2.2 Wiring Diagrams......................................................................................... 13
3.2.3 Connect Power Supply ............................................................................... 16
3.2.4 Initialisation................................................................................................ 16
Basic Configuration ...........................................................................................16
3.3.1 Access the Web Server............................................................................... 16
4. OPERATION ........................................................................................ 17
General notes ...................................................................................................17
Entering Numeric Values...................................................................................18
4.2.1 Typical numeric entry process (Input Password shown)............................ 18
On-Device Configuration...................................................................................19
4.3.1 Menu Structures......................................................................................... 19
4.3.2 Channel Setting Menu................................................................................ 19
4.3.3 Unit Setting Menu ...................................................................................... 20
4.3.4 Relay Setting Menu .................................................................................... 20
4.3.5 Password Setting........................................................................................ 20
Test & Reset......................................................................................................20
RS485 Connection .............................................................................................21
5. EMBEDDED WEB SERVER .................................................................... 22
Connect to the Web Server ...............................................................................22
Login .................................................................................................................22
View Data .........................................................................................................23
5.3.1 Graph.......................................................................................................... 23
5.3.2 Data............................................................................................................ 25
5.3.3 Test............................................................................................................. 25
Download Data .................................................................................................26
Debug Info ........................................................................................................26
Config Menu .....................................................................................................27
5.6.1 EarthLogger Config..................................................................................... 27
5.6.2 Relay Config................................................................................................ 28
5.6.3 Misc Config................................................................................................. 28
5.6.4 ELD Config .................................................................................................. 29
5.6.5 3G Config.................................................................................................... 29
5.6.6 VPN Config.................................................................................................. 29

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5.6.7 SMTP Config ............................................................................................... 29
5.6.8 SNMP Config............................................................................................... 30
5.6.9 Login Config................................................................................................ 30
System upgrade ................................................................................................30
5.7.1 Firmware Management.............................................................................. 30
5.7.2 Application Management........................................................................... 31
5.7.3 Web Management ..................................................................................... 31
5.7.4 System Upgrade ......................................................................................... 31
6. WARRANTY ........................................................................................ 32

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1. INTRODUCTION
EarthLogger is a Condition Monitoring and Logging device. Condition Monitoring reduces equipment failures
and accidents due to current leakage faults. Two common faults locations are Batteries and Circuits.
Leakage from battery
The interlocking circuits in railway signalling may be supplied from a battery having no earth connections. A
single fault presents no danger, however simultaneous faults may create a hazard. Continuous monitoring
will alert operators when one or more Earth Leakage events occurs.
Leakage from cables, lamp circuits etc.
Cables that run parallel with AC electrified railways are subject to induced voltages. When earth leakage
occurs in these cables, the induced voltages may disturb connected devices. A hazard may be created if
Earth Leakage occurs in Supply and Return cables.
EarthLogger remotely monitors, logs and responds to the Insulation Resistance and Voltage of up to four
attached busbars. EarthLogger can also log and respond to the outputs from up to four MRD ELD devices.
EarthLogger enables fault notifications by email, activation of local or remote alarms, and the forensic
examination of leakage or voltage fluctuation trends and events.

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2. PRODUCT DESCRIPTION
EarthLogger monitors and records the Insulation
Resistance (IR) and or Voltage of up to four attached
circuits (Channels), and four MRD ELD devices. The
device can be setup to recognise when IR or Voltage
drifts out of the acceptable range, and to generate
alerts when such conditions occur.
EarthLogger includes an embedded Web Server able to
control the device, change configurations, and view
logged data.
INSULATION MONITORING
EarthLogger alerts system operators if Insulation
Resistance falls below a user-selected trip value for
longer than a pre-set period. Alert devices are:
•On-screen display
•Illuminated LED
•Relay operation to activate external
equipment
•Communications using Ethernet or 3G/4G
•SNMP trap notification
For each Channel, there are two User selectable
Insulation Resistance trip values, RAN1 and RAN2,
referred to as Pre-Warning and Warning. The Pre-
Warning value must always be greater than the
Warning.
In the event of an alert, until Reset, the device will
(for the selected channel):
•Continue to monitor and display the current
IR value
•Display the highest recorded alert State
(Pre-Warning or Warning)
•If the IR or Voltage falls below the Warning
level and continues beyond the Trip Delay period
oIlluminate the corresponding LED
oActivate Relay(s)
PreWarning and Warning have the following settable parameters:
•Trip (Response) Value (k)
•Trip Delay (seconds)
•Relay Activated (1 or 2)
•Activated Relay State (Safe or Non-Safe)
Reset are done manually (on the device) or remotely, using the Web Server or a connected Reset switch.

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VOLTAGE MONITORING
Voltage monitoring detects over-voltage situations in connected equipment. For each Channel, there are
two user selectable Voltage Trip values, referred to as V-PreWarning and V-Warning. The general scheme of
operation and device responses is similar to Insulation Monitoring, except that the trip values are set to
detect a rising voltage i.e. V-PreWarning is always less than V-Warning.
ELDS
Up to four MRD brand ELD devices may be connected using RS-485 Modbus.
The EarthLogger logs the incoming data and events. EarthLogger can be configured to respond to ELD
generated alerts: on-screen display, activate Relays and send email notifications.
Connected ELDs are configured on the ELD itself. On the EarthLogger and Embeddded Web Server, the
settings are Read Only.
INSULATION RESISTANCE-PRINCIPLE OF MEASUREMENT
The Earthlogger measures Insulation Resistance using
the current measuring principle. The Equivalent Circuit
is shown at right, where RF= Insulation Resistance and
Ri= Internal Impedance.
The EarthLogger injects a polarity switching DC current
into the attached Bus. Fault current is measured and
used to calculate the Insulation Resistance (RF), as
shown below. The Equivalent Circuit is shown at right.
 

USER AUTHENTICATION
The device uses a Password to authenticate users and control ability to change device Settings. A Password
is not required to view device status or current Settings. An authorised user is able to change the default
password.
In the event of a lost password, the device can be unlocked using a Factory Password. Contact MRD to
obtain the Factory Username/Password combination.
EXTERNAL COMMUNICATIONS/ACTIVATIONS
Network connections are established using Ethernet or a 3G/4G modem. The SIM card is fitted internally:
the device must be opened to change or add a SIM card.
Two relays can activate external devices such as buzzers and lights, or connect to PLCs. Relays are set to be
Safe or NonSafe.

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LOGGING &UPLOADING
EarthLogger samples the Insulation Resistance and Voltage at 10Hz (10 samples per second).
To minimise the volume of data, logging occurs only if a change from the last recorded value is detected.
Sampling and Logging continues for all channels in the event of a PreWarning or Warning occurring.
If the network connection is lost, EarthLogger records up to 16Gb of data on internal memory (enough for
several years). Logged data will be uploaded when the network is restored.
By default, EarthLogger uses Ethernet to connect to the Internet via a local network. If Ethernet is not
available, EarthLogger attempts to connect using 3G/4G. It is possible to maintain simultaneous 3G/4G and
Ethernet connections. The network architecture is shown below.

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CONNECTORS
BOTTOM Connectors
No.
Name
Description
Legend
#1
AC
AC Supply voltage input
85-264V AC, 50-60Hz
DC
DC Supply voltage input
120-370V DC
#2
AC
AC Supply voltage input
85-264V AC, 50-60Hz
DC
DC Supply voltage input
120-370V DC
#3
Det. Earth
Main earth
#4
Test Earth
Use for testing earth integrity.
Connect to #3 ‘Det.Earth’ if not required
#5
CH-1 AC/DC
Channel 1 AC/DC busbar
#6
CH-1 AC/DC
Channel 1 AC/DC busbar
#7
CH-2 AC/DC
Channel 2 AC/DC busbar
#8
CH-2 AC/DC
Channel 2 AC/DC busbar
#9
CH-3 AC/DC
Channel 3 AC/DC busbar
#10
CH-3 AC/DC
Channel 3 AC/DC busbar
#11
CH-4 AC/DC
Channel 4 AC/DC busbar
#12
CH-4 AC/DC
Channel 4 AC/DC busbar
TOP Connectors
No
Name
Description
Legend
#13
RLY-1 –COM
Relay-1 Common Contact
#14
RLY-1 –NO/Front
Relay-1 Normally Open/Front Contact
#15
RLY-1- NC/Back
Relay-1 Normally Closed/Back Contact
#16
RLY-2 –COM
Relay-2 Common Contact
#17
RLY-2 –NO/Front
Relay-2 Normally Open/Front Contact
#18
RLY-2 –NC/Back
Relay-2 Normally Closed/Back Contact
#19
RS485-GND
RS-485 Ground. Internally connected
digital signal ground
#20
RS485-B
RS-485 comms.
#21
RS485-A
RS-485 comms.
#22
Reset
Remote Reset. Momentarily link terminal
#22 & #23 to clear fault
#23
Reset-GND
Remote Reset Ground. Internally
connected digital signal ground
ANT
ANT
Antenna of 3G modem
LAN
LAN
Ethernet RJ45 connector
USB
USB
USB host connector

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PACKAGE CONTENTS
Your EarthLogger package contains the following items:
•EarthLogger Unit
•3G Antenna (36-120mm)
•Installation Guide
•Warranty Statement
If any of these items are missing or damaged, please contact our sales representative for assistance.

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3. INSTALLATION
HARDWARE
3.1.1 Hardware installation
There are three recommended methods of mounting the EarthLogger
1. Mount EarthLogger on a 35mm DIN rail
a. The device snap fits to a standard 35mm DIN Rail
b. Use an insulated, flat-blade screwdriver to release the DIN Rail Clip
2. Mount using an optional Q-Style panel bracket
3. Panel mount using the flanges moulded into the case. Maximum fastener diameter: 3.5mm. A
hole drilling guide is provided below
Note: Cable clearance is required above and below the EarthLogger. The clearances shown below will
enable cables to be attached or removed with the device fixed in place. Inadequate clearance will result in
difficult installations and excessively tight cable bends.
3.1.2 Product Dimensions
3.1.3 Panel Mount Hole Spacing

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ELECTRICAL INSTALLATION
3.2.1 Basic Electrical Connections
3.2.1.1 Installation notes
•Dangerous voltages may be present. MRD recommends that buses are deactivated before
connections are made
•Use appropriate Personal Protective Equipment when handling live connections
•Refer to Wiring Diagrams below
•Monitored Busbars can be AC or DC
•Connect only one busbar per channel
•DO NOT connect devices or Channels in parallel
•Bus connectors are in pairs: Connector 5 & 6; 7 & 8; 9 & 10; 11 & 12
•Extra care is required when connecting Bus cables to the device. DO NOT allow Bus Connections
wires to touch any terminal other than the target connectors: the device will be damaged
•Tighten terminals to 0.5-0.6nm. Ensure all connections are tight before use
3.2.1.2 Test-Earth and Detector-Earth Connections
EarthLogger injects currents into attached circuits, and measures small differences in order to calculate the
Insulation Resistance of the circuit. Self-Test places a 10Kresistor in circuit to validate the device. The
injected current and responses may be very small compared to the attached circuit: The measuring circuit is
sensitive to poor earth connections and excessive electrical noise.
There are two common methods of attaching EarthLogger Style devices, listed below. MRD recommends
Method 2 as it has clear advantages over Method 1. The diagrams in section 3.2.3 are Method 1 style
schemes.
The System Operator must develop a suitable Self-Test Schedule.
Method
Description
Comment
1
Test And Detector Earth are
connected to Earth using separate
cables and Earth Stakes to Ground
Possible issues:
•Poor stake-to-stake Conductivity via earth
•Broken wires will invalidate Self-Test result
•Potential electrical noise introduced by external equipment or systems
2
Test and Detector Earth are
connected to an Earth Bus, which
is separately connected to
Ground
Advantages:
•Less opportunity for external noise to affect the Measuring Circuit
•Broken Earth Bus to Ground cable will not affect Self-Test validity

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3.2.2 Wiring Diagrams
Five common installation schema are:
•Three-Phase AC Bus
•Two-Wire DC Bus
•AC/DC Control Circuit
•Two-Phase AC Bus
•Dual-Pole DC Bus
3.2.2.1 Monitoring of Three Phase AC Bus

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3.2.2.2 Monitoring of Two Wire DC Bus
3.2.2.3 Monitoring of AC/DC Control Circuit

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3.2.2.4 Monitoring of Two Phase AC Bus
3.2.2.5 Monitoring of Dual Pole DC Bus

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3.2.3 Connect Power Supply
At power ON, the EarthLogger will automatically detect the supply. Acceptable supply is 85 –264V AC.
3.2.4 Initialisation
Following Power ON, the EarthLogger displays “Initialising…” for
approximately 60 seconds. During this phase, the EarthLogger starts
internal systems, attempts to find a DHCP server and obtain an IP address,
unless Static IP is configured. If an IP address is not obtained or is not
defined, the IP address will default to 10.0.0.251. The EarthLogger will
attempt to obtain an IP address if a network is subsequently detected.
Following Initialisation, the EarthLogger will commence logging of all
configured Channels, and display the status of Channel 1 (CH-1).
Note: Three LEDs may illuminate during initialisation: They are not
significant.
BASIC CONFIGURATION
Device configuration can be completed using On-device menus or the Embedded Web Server.
MRD recommends configuring the EL4+ using the Embedded Web Server: It provides greater clarity, and
is faster, easier and more efficient.
If no peer-to-peer or network connection can be established, the on-screen menu and keypad can be used
to operate and configure many device parameters.
3.3.1 Access the Web Server
Task
Action
Display
•At the EarthLogger device, press
Menu
•Use the Arrow keys to highlight
Settings. Press Select
•Use the Arrow keys to highlight IP
Address. Press Select
•Note the current IP address (E:)
•Open a Web Browser and go to the IP
address noted above. The embedded
Web Server will appear

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4. OPERATION
GENERAL NOTES
Feature
Sub-Feature
Function
Comment
OLED display
Auto Off
After 10 minutes of inactivity the
current function will be cancelled
and the display will turn OFF
Improves device security; Conserves
energy and extends the display life
Channel
The current Channel, from 1 to 4
Voltage
The voltage of the current Channel
0-650V AC, 0-650V DC
Indicates Ethernet found
Leakage
Insulation Resistance of the current
Channel. Displays up to 500kΩ
Values over 500kΩare indicated by
“- - -“
Status Line
Indicates the status of the current
Channel
Displays OK, PREWARNING,
WARNING or TESTING
LEDs
Flashing RED
Current Channel is under TEST
Constant RED
Warning on the indicated Channel
Buttons*
MENU
Call the Main Menu; Return to the
previous menu
Disabled during a “Change Value”
process
SELECT
Selects highlighted item; Confirms or
Saves current value and returns to
the previous item or menu
Change current Channel; Navigate
menu; Increase selected value
In rare instances, options may be
displayed side-by-side. Use the
arrow keys to alternate highlighting,
and press Select to select the
highlighted value
Change current Channel; Navigate
menu; Decrease selected value
TEST
Conduct Self-Test on current
Channel. The TEST routine includes
inserting a 10kΩresistor into the
measuring circuit.
If the PreWarning or Warning trip
point is set less than 10kΩ, the
device will enter and remain in the
tripped state until RESET is Pressed.
RESET
Clears a PreWarning or Warning on
the current Channel
*The Keypad functionality is context sensitive: the key actions may vary slightly between screens.

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ENTERING NUMERIC VALUES
Numeric values are required for trip values, delay times, and passwords. The input method is similar in all
situations:
•Settable fields are presented for change as individual digits. Passwords are concealed
•If a low value is required, leading zeros must be used e.g.0050 = 50, 0005 = 5, etc
•Working from left to right, digits are set from 0-9 scrollable list. A final confirmation is required.
4.2.1 Typical numeric entry process (Input Password shown)
Task
Action
Display
•Input password
•Press UP or DOWN Arrows to change
digit value
•Press SELECT to move cursor right
•Repeat until Highlight moves to OK
•Press SELECT to Continue
•Incorrect Password
•Message will be displayed
•Press SELECT to continue

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ON-DEVICE CONFIGURATION
4.3.1 Menu Structures
MRD recommends that on-device configuration be limited to setting a Static IP, if required. Complete all
other configuration using the Embedded Web Server: there is greater clarity; easier; and more efficient.
4.3.2 Channel Setting Menu
Setting
Description
Allowable Values
Delay
The Delay is the time that the insulation resistance must remain below the
set value, prior to activation of the Pre-Warning or Warning alarms
2-10s
PreWarning
Non-Critical Fault insulation value - requires attention.
For safety, the pre-warning value must be above 50K.
To set a higher value, calculate the correct value using the following
equation:    
: The Pre-Warning value ()
: The voltage on the measured bus (Volts). For AC,  should be
the peak value (=1.414 x RMS)
.g. If RMS value of the bus voltage is 650VAC, set the pre-warning to:
  
50-100k
Warning
Critical Fault insulation value - requires immediate attention.
The Warning value must be less than the Pre-Warning value.
Calculate the correct value using the following equation:
   
: The Warning value ()
: The voltage on the measured bus (Volts). For AC,  should be
the peak value (=1.414 x RMS)
.g. If RMS value of the bus voltage is 650VAC, set the pre-warning to:
  
10-100k&
<Pre-Warning
V-Delay
Voltage Delay is the time that the voltage must remain below the set value,
prior to activation of the Pre-Warning or Warning alarms
2 –10s
V-PreWarning
Voltage PreWarning: Non-Critical Fault - requires attention.
The Voltage Pre-Warning alarm will activate when the measured voltage falls
below this value.
0 –650V
V-Warning
Voltage Warning: Critical Fault - requires immediate attention.
The Warning value must be less than the Pre-Warning value.
0 –650V

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Setting
Description
Allowable Values
The Voltage Warning alarm will activate when the measured voltage falls
below this value.
Enable
Enable or disable the selected channel
Y- Enable
N- Disable
4.3.3 Unit Setting Menu
Setting
Description
UNIT ID
Displays the unique ID of the EarthLogger
IP
Displays the IP address of Ethernet; or IP address of 3G/4G
Version
Displays the software version of the EarthLogger
TM
Displays the device Timestamp at the moment when the Unit Setting Menu was selected, noting:
•The date and time displayed may not match local time
•Timestamp is in the format yyyymmddHHMM.
4.3.4 Relay Setting Menu
Setting
Description
Allowable Values
Relay Setting
Changes the default mode of the Relays.
•Safe mode: the relay is de-energized by default
•Non-safe mode, the relay is energized by default
Safe
NonSafe
4.3.5 Password Setting
Allowable Values
Old Password
Enter the existing password using the numeric method described in 4.2.1
Existing password
only
New Password
Enter a new password (Record this number for future reference)
0000-9999
New Password
Re-enter new password to confirm
As above
Save Cancel
Use the Arrow Keys to alternate selection. Press SELECT to finish
Save or Cancel
TEST &RESET
Function
Action/Response
Comment
TEST
Press TEST to run a Self-Test on the current
Channel. A pas result is indicated by:
•Device entering a fault-state
•Display indicating 10K (+/-2K)
The test will not begin if the device is in a fault
state. The test will halt if:
•An internal fault occurs
•Connect Bus resistance is or falls below the Pre-
Warning value
•Test times out
RESET
Press RESET to deactivate a PreWarning or
Warning
The device will return to a fault state if the fault
has not been rectified
The device remains in a Fault State even after the
fault is removed, This is indicated by an
illuminated LED.