SKF IMx-8 User manual

Copyright © 2018 by SKF Group
All rights reserved.
SKF Sverige AB
Aurorum 30, 977 75 Luleå, Sweden
Telephone: +46 (0) 31 337 10 00
SKF Multilog On-line System
IMx-8/IMx-8Plus
User Manual
Part Number 15V-090-00049-100
Revision E –September 2020
Read this manual carefully before using the product. Failure
to follow the instructions and safety precautions in this manual can
result in serious injury, damage to the product or incorrect
readings. Keep this manual in a safe location for future reference.


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Technical Support –SKF's Technical Support Group can be reached during normal business hours
via phone, e-mail and live chat. Always check the self-service web portal before contacting your
nearest Technical Support Group (TSG) to see if the answer is already published. You may search
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•E-Mail: [email protected]
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Table of contents
1Product description .......................................................................9
1.1 SKF Multilog On-line System IMx-8/IMx-8Plus..............................................9
1.2 Differences between the IMx-8 and the IMx-8Plus ........................................9
1.3 System communications...............................................................................11
1.3.1 Mobile data.....................................................................................11
1.3.2 Local network RJ45 or Wi-Fi module.............................................11
1.3.3 Bluetooth........................................................................................12
1.3.4 Modbus interfacing to external systems........................................12
1.4 Outer cabinet (optional)................................................................................13
1.5 External antenna for mobile data/Wi-Fi (optional)........................................14
1.6 GPS module (optional) .................................................................................14
2Installation and operating instructions......................................15
2.1 Introduction...................................................................................................15
2.2 Mounting the IMx-8/IMx-8Plus......................................................................16
2.3 Power requirements......................................................................................18
2.4 Site cabling considerations...........................................................................20
2.4.1 Sensor cabling ...............................................................................20
2.4.2 Ethernet cabling.............................................................................21
2.4.3 RS485 Modbus cabling..................................................................21
2.5 SKF Multilog On-line System IMx-8/IMx-8Plus............................................21
2.5.1 Introduction ....................................................................................21
2.5.2 Network configuration....................................................................21
2.5.3 Ethernet connection.......................................................................22
2.5.4 Mobile data configuration...............................................................22
2.5.5 RS485 Modbus connections..........................................................23
2.5.6 LED indicators................................................................................24
2.5.7 Connecting accelerometers (A1 to A8)..........................................25
2.5.8 Connecting voltage sources (A1 to A8).........................................25
2.5.9 Connecting 4–20 mA signals (A1 to A8)........................................25
2.5.10 Connecting tacho/speed signals (D1 to D2)..................................26

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2.5.11 Connecting relays ..........................................................................30
2.5.12 System commissioning and security..............................................31
2.5.13 IMx-8/IMx-8Plus Stand-alone mode ..............................................32
2.5.14 Time synchronisation.....................................................................32
2.5.15 Network data transfer.....................................................................32
2.5.16 Storage capacity ............................................................................33
2.6 Hardware Maintenance.................................................................................34
2.6.1 Performance over Time .................................................................34
2.7 Mobile data/Wi-Fi antenna (optional)............................................................34
2.8 GPS module (optional) .................................................................................35
2.9 Troubleshooting............................................................................................36
2.9.1 Introduction ....................................................................................36
2.9.2 Rescue Button................................................................................36
2.9.3 Sensor circuits................................................................................37
2.9.4 Relay driver outputs.......................................................................42
2.9.5 RS485 Modbus RTU communications...........................................43
2.9.6 Connections to Monitor..................................................................44
3Product specifications.................................................................45
3.1 Product labelling ...........................................................................................45
3.2 SKF Multilog On-line System IMx-8/IMx-8Plus............................................46
3.2.1 Environmental................................................................................46
3.2.2 Power.............................................................................................46
3.2.3 Analogue inputs .............................................................................46
3.2.4 Digital inputs...................................................................................47
3.2.5 Digital outputs ................................................................................47
3.2.6 Analogue measurement.................................................................47
3.2.7 Digital measurement......................................................................47
3.2.8 Signal processing...........................................................................48
3.2.9 Interfaces........................................................................................48
3.2.10 Storage capacity ............................................................................49
3.2.11 Data processing memory...............................................................49
3.2.12 IMx-8 certifications.........................................................................49
3.2.13 IMx-8Plus certifications..................................................................49

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3.2.14 Quality control................................................................................51
3.3 Connector details..........................................................................................52
3.3.1 IMx-8 top end cap ..........................................................................52
3.3.2 IMx-8 bottom end cap....................................................................53
3.3.3 IMx-8Plus top end cap...................................................................54
3.3.4 IMx-8Plus bottom end cap.............................................................55
3.4Enclosure and cabinet mechanical drawings...............................................56
3.4.1 IMx-8/IMx-8Plus enclosure ............................................................56
3.4.2 IMx-8/IMx-8Plus IP65 cabinets (optional)......................................56
3.5 HMI display (optional)...................................................................................58
3.6 Mobile data / Wi-Fi antenna (optional) .........................................................59
3.7 GPS module (optional) .................................................................................60
4Electrical waste ............................................................................61
Appendix A Limited Warranty...........................................................63


PRODUCT DESCRIPTION
SKF Multilog On-line System IMx-8/IMx-8Plus
SKF Multilog On-line System IMx-8/IMx-8Plus
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1 Product description
1.1 SKF Multilog On-line System IMx-8/IMx-8Plus
The IMx-8/IMx-8Plus supports 8 analogue inputs; typically accelerometers or voltage
inputs and 2 digital inputs; typically for tacho signals.
1.2 Differences between the IMx-8 and the IMx-8Plus
Key differences in functionality between the IMx-8 and the IMx-8Plus versions relate
to network infrastructure supported ‘on-device’ and are listed in the table below:
Table 1 Feature comparison IMx-8 and IMx-8Plus
Feature
IMx-8
IMx-8Plus
Mobile data connection
–
Yes
Wi-Fi
–
Yes
Ethernet (RJ45)
Yes
Yes
Simplified overviews of IMx-8 and IMx-8Plus systems are shown in Figures 1 and 2
below, details of the specific features and capabilities follow. Note that in practice
@ptitude Observer software will usually be communicating with multiple IMx devices
of various types.
Figure 1 SKF Multilog IMx-8 typical connections overview
Whilst Ethernet is the only infrastructure natively supported by the IMx-8 other
network types could be used given appropriate external hardware.

PRODUCT DESCRIPTION
Differences between the IMx-8 and the IMx-8Plus
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Figure 2 SKF Multilog IMx-8Plus typical connections overview
In addition to the 8 analogue channels, there are two digital inputs for speed and both
devices have RS485 and LAN interfaces. As illustrated, for the IMx-8Plus alternative
interfaces include Wi-Fi and mobile data. Note that mobile data, RJ45 or Wi-Fi
connectivity are all alternative infrastructures to connect the IMx-8Plus to wider
networks and cannot be used simultaneously.
Each IMx is supplied with demountable terminals for digital I/O, RS485, analogue
sensor wiring, etc. as well as type specific connectors for some of the interfaces and,
where applicable, antenna connections. If required, the RS485 link can interface by
Modbus RTU to an external, optional, GPS module.
A Bluetooth dongle provides a convenient means of accessing the IMx, from the SKF
Multilog IMx Manager app. This app is used for a SAT (Site Acceptance Test), device
network configuration and is the companion app if the IMx is used in stand-alone
mode. Note that user access must be pre-arranged, refer to section 2.5.12.
Optional IP rated cabinets are available, 3.4.2.

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System communications
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1.3 System communications
The communications setup or mode determines how the IMx will communicate with
the wider system. There are 3 alternative arrangements that can be used:
•Server initiated –@ptitude Observer initiated communication
•Client-Server –the IMx is the initiator of the communication
•Stand-alone –no connection to @ptitude Observer
Whilst the first two are alternatives for @ptitude Observer/IMx communication,
illustrated diagrammatically in Figures 1 and 2, the stand-alone option refers to
operating the IMx independent of @ptitude Observer software and instead using the
companion app, to interact with it. For stand-alone mode, refer also 2.5.13.
Whilst the different network possibilities (1.3.1 to 1.3.2 below) offer alternative
connection methods, there are limitations on the permissible combinations of
communication mode and network connection method:
1. Server initiated, requires a server installed on a local network (with RJ45 or, if
applicable, Wi-Fi connection).
2. Mobile data connectivity, whether implemented within the IMx-8Plus or
external to an IMx-8, is only supported in Client-Server mode (device-initiated
communications).
The choice between using a mobile data connection or a LAN connection (RJ45 or
Wi-Fi), is part of the IMx-8Plus configuration.
1.3.1 Mobile data
In the IMx-8Plus, a built-in module provides a mobile data connection. It can work
world-wide and provides connectivity to @ptitude Observer software. Mobile data
functionality requires an activated SIM card or eSIM. An external antenna is required
(1.5); two LTE connectors are provided.
1.3.2 Local network RJ45 or Wi-Fi module
In the IMx-8Plus, a built-in Wi-Fi module provides a Wi-Fi communication interface
(2.4 GHz) so that, where available, that can be used as the first stage of connectivity
to @ptitude Observer software, rather than a hard-wired LAN (RJ45) or the mobile
network. Similarly to mobile data, an external antenna is required for Wi-Fi, the
optional antenna offered by SKF (1.5) fulfils both roles.
An RJ45 Ethernet connection is the only network interface built-in to an IMx-8.

PRODUCT DESCRIPTION
System communications
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1.3.3 Bluetooth
As supplied, a Bluetooth dongle specifically configured by SKF is already mounted in
the IMx USB Type-A port. Bluetooth is used for communication between the IMx and
the SKF Multilog IMx Manager app. This is particularly useful when the IMx is in
stand-alone and SAT mode but works in all modes.
Important note:
1.3.4 Modbus interfacing to external systems
Modbus communication is a commonly used protocol for exchanging information
between systems, often from different suppliers or providers. The IMx-8/IMx-8Plus
support both Modbus TCP/IP and Modbus RTU (2-wire RS485 infrastructure),
including some simultaneous use, refer Table 2.
Table 2 Allowable Modbus communication combinations
TCP Master
RTU Master
TCP Slave*
Supported
Supported
RTU Slave
Supported
Not supported
TCP Slave* + RTU Slave
Supported
Not supported
Notes:
*The IMx can be a slave in multiple TCP/IP connections subject to the following
limitations:
•A maximum of 4 Modbus connections, master, slave, TCP/IP and RTU in
total
oIf the IMx is a Modbus RTU slave on a bus with other slaves, this only
counts as one connection towards the above limitation as only one
master connects to it.
Master devices typically retrieve data from slave devices, and in the IMx this data is
written to 32 Modbus external channels. When configured as a master device, the
IMx supports up to 4 slaves. The 32 available channels can be split/allocated to
specific slaves and can have different register mapping and byte/word ordering.
Multiple master usage and the writing of data to that IMx in slave mode, are both
Due to special configuration for its use with the IMx, the specific dongle
provided by SKF must be used and this supports only Bluetooth v4.0 Low
Energy.

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Outer cabinet (optional)
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disallowed as in the IMx the 32 Modbus external channels are allocated to the single
master.
The number of slaves supported is reduced by the number of other Modbus
connections, enabled, see earlier note.
When configured specifically as an RTU master to the optional GPS module slave,
External Communication type ‘GPS50M’ rather than ‘Modbus’, @ptitude Observer
creates an appropriate Modbus and Modbus external channel configuration for the
GPS data transfer. For more information, refer to the SKF @ptitude Observer User
Manual, Revision Q or later.
The Modbus RTU 2-wire interface can only support one operational mode, either
Master or Slave.
In an IMx-8Plus, Modbus TCP/IP can only be used if a LAN, rather than mobile data,
is being used for connection to @ptitude Observer or cloud systems and must use
the same media/interface –RJ45 or Wi-Fi.
For more information regarding Modbus capabilities, refer to "Modbus for SKF
Multilog On-line System IMx and SKF @ptitude Observer” and also the application
note “General Modbus Protocol Considerations for IMx Devices”.
1.4 Outer cabinet (optional)
Where the IMx-8 is not located in an existing cabinet, outer cabinets are available,
3.4.2, to house it and any supporting electronics, provide cable gland areas for
sensor, antenna, the GPS and other cables.
The glands used with these enclosures should be chosen to maintain the cabinet IP
rating and be appropriate for the application and environment, cable type and site
practices.
The recommended cable glands sizes for an IMx-8/IMx-8Plus cabinet are M12 x
1.5mm, M20 x 1.5mm and M25 x 1.5mm. The pre-drilled SKF cabinet, Figure 3, has
two entries for M25 x 1.5 glands, one entry for a M20 x 1.5mm gland and 14 entries
for M12 x 1.5mm glands. As supplied, all 17 cabinet entries are fitted with blind plugs.
It is not easy to make specific recommendations related to cable glands as it
depends heavily on the application and the site practices, regulations, sensor type
and so on.
In general, from a noise performance perspective it has been seen that noise levels
are often better if an EMC type cable gland (normally metal) is used, but then care
must be taken to:
•Avoid ground loops via the sensor cables by preferably connecting the shield
at the IMx-end.
•Ensure the metal/EMC cable gland has a good connection to the metal box,
the nut or washer must penetrate the paint or coating on the box.

PRODUCT DESCRIPTION
External antenna for mobile data/Wi-Fi (optional)
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Important –To avoid ground loops, SKF recommends connecting the shield
only at the IMx-end.
If the application does not allow that type of gland, it is possible to use isolated
(normally plastic) cable glands, but then care must be taken to:
•Ensure shield grounding is performed in a way that avoids both EMC noise
and ground loops.
What to select for best performance (isolated plastic or EMC metal cable glands), is
very application specific and needs to be evaluated in each case by/together with the
customer.
Important - All unused cable openings must remain closed with blind plugs.
1.5 External antenna for mobile data/Wi-Fi (optional)
For use with an IMx-8Plus, SKF offer an optional external antenna that supports both
Wi-Fi and mobile data connectivity, noting that the mobile data and Wi-Fi interfaces
cannot be used simultaneously.
The antenna is designed to be mounted externally on the cabinet and connects to
both LTE connections and the Wi-Fi connection. See section 3.6.
1.6 GPS module (optional)
An optional GPS module is available, see section 3.7. This has an integral antenna,
but the module itself must be fitted external to any IMx cabinet.
The IMx can use position data to collate and associate with the condition monitoring
measurements. The GPS data is requested by the IMx, acting as a Modbus RTU
master on the RS485, two-wire serial interface.
Note that when configured for full GPS support in @ptitude Observer so that position
and other measurement data are stored together, only this single Modbus slave is
supported, there is no multiple slave support.
Connections for the GPS module are available on the ‘top’ end cap of the
IMx-8/IMx-8Plus, refer section 2.8.

INSTALLATION AND OPERATING INSTRUCTIONS
Introduction
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2 Installation and operating instructions
2.1 Introduction
Before beginning an installation, it is important to assess and evaluate the location
where the system is to be installed and to plan how the installation should look after it
has been completed. Make a detailed layout of the equipment and note distances
between components and the networks to which it should connect. Specify the
configuration requirements of each interface, for example IP addresses and subnet
mask for LAN connections or intended Modbus RTU mode (slave or master).
Amongst other things, consider the lengths of all cables, their routing, where
electrical power for the unit can be sourced and any interfaces to the plant systems.
Good and thorough planning is the basis for a successful installation and system
implementation.
Important safety warnings:
In some countries, the installer must be certified to install equipment, such
as an IMx.
Make sure that the power is disconnected before the installation begins.
Observe all site safety requirements including any that may be specific to
the machines or areas where the installation work is being carried out.

INSTALLATION AND OPERATING INSTRUCTIONS
Mounting the IMx-8/IMx-8Plus
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2.2 Mounting the IMx-8/IMx-8Plus
When selecting a location for the IMx, including any outer cabinet, make sure to
consider the following aspects:
•Position it to minimise vibration and to keep clear of high voltage equipment.
•Avoid unnecessary exposure to radiant heat or strong magnetic fields.
•Choose a location convenient for cable routing, to and from the cabinet.
•With unobstructed access and clearance for opening the lid.
•Suitable for a cabinet of this size and weight.
•That will accommodate all the required fixing points.
The IMx-8/IMx-8Plus have a blue, painted aluminium enclosure that is IP30
classified. To provide higher environmental protection, they should be mounted
inside a cabinet: an IP65 classified cabinet can be provided by SKF. When using any
outer cabinet, always use all the recommended fixings to mount and secure it.
For the SKF IP65 classified cabinet all the needed brackets, screws and gaskets are
included. Refer section 3.4 for the enclosure and cabinet dimensions and fixing
centres. When selecting a type of cable gland, parameters such as IP-classification
and cable shielding connection must be carefully considered so as not to
compromise the IP65 certification of the cabinet.
Figure 3 An IMx device DIN rail mounted in IP65 cabinet

INSTALLATION AND OPERATING INSTRUCTIONS
Mounting the IMx-8/IMx-8Plus
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Like the IMx-16 variants, the IMx-8/IMx-8Plus are designed to be DIN rail mounted,
Figure 3 above, shows an IMx device DIN rail mounted in a SKF IP65 classified
cabinet.
The IMx is mounted using the DIN rail bracket attached to the rear face of the device,
Figure 4 below.
Figure 4 An IMx device DIN rail mounting bracket
To mount it on the DIN rail, first angle and offer it to the rail so that it is hanging on
the upper part of the bracket and then rotate downwards and snap it in place with the
lower part of the bracket.
To dismount first remove any connectors/wiring, then snap the lower part of the
bracket from the DIN rail and lift it up a little. The IMx is now free to be lifted away
from the DIN rail.
Careful attention should be paid to system grounding, earthing, as the IMx inputs are
single ended and the common or return signal connections are at the same potential
as the immediate IMx casing. This is isolated from the DIN mounting rail by the
insulating mounting bracket and a green/yellow case earth lead is provided to enable
a single deliberate connection to an instrument quality ground. In Figure 3 this can be
seen terminating at the cabinet earth rail which should itself be isolated from the
outer enclosure and connected only to an instrument ground, when one is available.
The same ground should ideally be used for sensor cable screens so that the IMx
system is grounded at only that one point.
In all cases avoid situations where the IMx ground connects to multiple ground
planes as it is likely there will be differences in potential that could affect sensor
signals. Similarly avoid sharing a ground used by machinery or other non-instrument
grade equipment as their operation is likely to cause disturbances in the potential of
that ground plane and if occurring would directly impact the IMx vibration readings
and/or bias voltage measurements. Be aware that by their nature issues caused by
non-ideal grounding schemes may be inconsistent and may only occur intermittently
due to changes and operations elsewhere.

INSTALLATION AND OPERATING INSTRUCTIONS
Power requirements
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Where the IMx receives a signal from another system, for example load, speed or
trigger signal, that other system will usually have a different ground reference and if
its signals are not isolated at source, then a ground loop is created when the
connection is made. To prevent this a signal isolator is needed between the external
system and the IMx.
2.3 Power requirements
The SKF Multilog IMx-8/IMx-8Plus are designed to be powered from a 22 to 50 V DC
supply, typical power consumption 10 W or lower. The supply to the device should be
fused at 2 A, slow-blow, refer 3.2.2.
The incoming DC supply is isolated from GND (chassis).
Refer also to the important safety warnings on the following page.
SKF can supply a DIN rail mounting power supply under part number reference
CMON 4137. This provides a 24V DC output suitable for an IMx-8/IMx-8Plus or an
IMx-16/IMx-16Plus device and has a wide-ranging AC/DC input, see 3.2.2.
Note that the IMx-8/IMx-8Plus also support PoE (Power over Ethernet). This can be
used as either a single or as a redundant power source, refer 2.5.3 and 3.2.2.

INSTALLATION AND OPERATING INSTRUCTIONS
Power requirements
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Important safety warnings:
The system power supply must be provided with an appropriately
positioned, clearly labelled full pole isolator or switch that can be used to isolate
and lock-out power from the IMx unit during installation, maintenance or
modification work. The switch must be labelled with an appropriate name, with
clear identification of which IMx if multiple units are deployed. The On/Off
position must be clearly marked.
The supply scheme should also incorporate suitable fusing or circuit breakers.
To prevent a hazardous event, power cable return and positive wires must
be secured together with a cable tie (for example, a nylon cable tie CV-100K)
close to the power connections, at the IMx.
Figure 5 Example of securing positive and return wires with a cable tie
To connect the IMx to the DC power supply, use cable of the following
standard or better:
FKLK 3 x 1.5 mm2(16 AWG) or EKLK 3 x 1.5 mm2(16 AWG) or corresponding,
with minimum voltage requirement 300 V and temperature range of −40 to
+70 °C (−40 to +158 °F).
The power supply cable must be properly fixed to prevent strain, twist or
movement. Always use an appropriate cable gland at entry to any outer
enclosure and cable trunking or similar within it.

INSTALLATION AND OPERATING INSTRUCTIONS
Site cabling considerations
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2.4 Site cabling considerations
When routing cabling to the IMx or the protective cabinet:
•Route and secure them at regular intervals, to minimise cable vibration
•Keep clear of high voltage equipment, their cables or strong magnetic fields
•Avoid exposure to or protect against radiant heat
•Choose a cable routing, that doesn’t obstruct access to the IMx
•Avoid cable and sensor locations that interfere with routine maintenance
For cable/wire ends, bootlace ferrules or cord end terminals are recommended. The
wire end should have a maximum cross section/gauge of 1.5 mm² / 16 AWG and an
insertion length of approximately 10 mm.
Important safety warnings and guidance:
2.4.1 Sensor cabling
An IMx-8/IMx-8Plus can connect to the following sensor types:
•Accelerometers, 2-wire, constant current
•Voltage output sensors, 2-wire, including externally powered accelerometers
•4-20 mA outputs, 2-wire, load resistor must be fitted at IMx input terminals
•Speed sensors, 2- or 3-wire
If not otherwise specified, by a sensor supplier or similar, signal wiring to the IMx
should use shielded, twisted pair 2 x 0.5 mm2(FKAR-PG 1 x 2 x 0.50 DUE 4002 or
equivalent), with minimum voltage requirement of 300 V.
Only remove any cabinet blind plugs where it is necessary to accommodate
a cable, an appropriate cable gland must then be used. Any unused cable entries
must remain closed off.
Refer also to the instruction manual: ‘Attaching Sensors for SKF Multilog
On-Line Systems’. This provides examples of monitoring scenarios (typical
number and location of sensors) as well as important guidance regarding the
fitting of sensors.
This manual suits for next models
3
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SEMIKRON SKiiP 3 Technical Explanations