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SKF Multilog IMx-S Series User Manual

SKF Multilog IMx-S Series
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Troubleshooting Guide
Sensor circuits
SKF Multilog On-Line System IMx-S 5 - 3
User Manual Revision S
NO: The sensor is defective. Replace the sensor.
YES: The sensor cable (or contact/connector) has a short circuit and requires
repair/replacement.
4. Is the voltage close to the open circuit voltage?
YES: There is an open circuit in the cable or the sensor is damaged. Skip to step
5.
NO: If the voltage appears to be neither within the normal working range, close to
zero nor close to the open circuit voltage, then the fault is an unusual one.
First, recheck that the DCV measurement was correctly carried out, then
contact TSG for advice.
Remaining faults can be due to a damaged sensor or a damaged IMx-S input circuit. First,
disconnect one pole of the sensor cable and measure the open circuit voltage to verify
whether the open circuit voltage is normal (about 24 V DC). If it is normal, then the fault
is probably in the sensor, otherwise the fault is likely in the IMx-S.
5. Disconnect the connector from the sensor and short circuit the pins in the sensor
contact, then re-measure the voltage on the IMx-S terminal block. Did the voltage
sink to close to zero (<0,5 V)?
NO: There is an open circuit in the cable. Repair/replace the cabling.
YES: There is an internal open circuit in the sensor or there is a bad/oxidised
contact. First, try cleaning the contact before replacing the sensor connector
and checking again.
Checking eddy current probe inputs
Like troubleshooting a 2-wire accelerometer, the checking of eddy current probe inputs
includes confirming the presence of a return signal DC offset in an acceptable or
expected range. In this case however, the sensors are 3-wire, so have a separate wire for
the power supply, and that signal return DC is related to the gap between the probe and
the target or shaft.
1. Identify the input terminals where the channel in question is connected to the IMx-S
and first measure the sensor power supply voltage between Pwr and B at the
terminal block, using a digital voltmeter.
2. Is the measured voltage as expected? For an eddy current probe system this should
be close to -24 V DC, a significantly lower voltage would indicate a fault.
Yes: Skip to step
3.
No: Now remove the sensor wiring from the Pwr terminal and recheck.
a. Did the fault remain?
NO: The sensor circuit appears to be excessively loading the power supply.
Check the sensor circuit cabling for the presence of a short, a similar
measurement with the sensor wiring disconnected at the driver end can be
used to indicate whether the fault lies with the cabling or the driver. Repair
or replace as required.
YES: Check first the configuration settings for this channel, especially the DIP
switches. If all appears as expected, the fault may be with the IMx-S device,
contact TSG for advice and further information.

Questions and Answers:

SKF Multilog IMx-S Series Specifications

General IconGeneral
BrandSKF
ModelMultilog IMx-S Series
CategoryControl Systems
LanguageEnglish

Summary

Introduction to SKF Multilog On-Line System IMx-S

Important Messages for IMx-S Users

Crucial safety and operational information for a safe and reliable system.

SKF Multilog On-Line System Overview

Overview of the IMx-S within the SKF Multilog On-line System product range.

SKF IMx-S Unit Description

Detailed description and specifications of the IMx-S unit, including models.

IMx-S System LED Indicators

Explanation of the system's status indicators, including SYS and PWR LEDs.

Installation of SKF IMx-S System

Safety Considerations During Installation

Critical safety precautions and site requirements for installing the IMx-S unit.

Installation Scenario and Planning

Guidance on assessing and planning the installation location and layout for the system.

SKF IMx-S Supply Cable Requirements

Recommendations for power supply cables, including type and connection requirements.

Mains Power Connection Procedures

Detailed instructions for connecting the power cable to the mains power grid safely.

Sensor Cable Installation Guidelines

Recommended sensor cable types and routing considerations to maintain signal integrity.

Ethernet Cable Specifications

Specifications for Ethernet cables, including types for different lengths.

Ethernet Connection Setup

Information on connecting the IMx-S unit via Ethernet ports and their functionality.

Cable Gland and Entry Requirements

Guidelines for using cable glands and blind plugs for proper enclosure sealing and fire protection.

SKF IMx-S Unit Configuration

Analogue Input Configuration

Details on terminal connections and DIP switch settings for analogue sensors.

Digital Input Configuration

Information on terminal lists and DIP switch settings for digital input configuration.

RS485 Communication Setup

Configuration details for RS485 communication, including termination resistors.

Relay Driver Output Configuration

Overview of the IMx-S relay driver outputs and their terminal connections.

Dig1 Buffered Output Configuration

Description of the Dig1 buffered output and its connection to a tachometer input.

Network Configuration and Unit ID Setup

Steps and considerations for configuring network settings and unit IDs.

Setting IMx-S Unit Time

Methods for setting and synchronizing the IMx-S unit's time.

SKF IMx-S Hardware Maintenance

Hardware Maintenance Overview

Information on the maintenance requirements for the IMx-S hardware.

Troubleshooting SKF IMx-S System

Troubleshooting Sensor Circuits

Diagnosing and resolving issues related to sensor circuits and connections.

Checking Vibration Channels

Step-by-step guide to troubleshoot non-responsive 2-wire accelerometer channels.

Troubleshooting Eddy Current Probe Inputs

Troubleshooting steps for eddy current probe inputs, including voltage and signal checks.

Troubleshooting 4-20 mA Channels

Diagnosing issues with 4-20 mA channels, checking DIP settings and wiring.

Troubleshooting Analogue Input Channels

Troubleshooting analogue input channels, verifying connections and voltage measurements.

Troubleshooting Digital Input Channels

Steps to troubleshoot digital input channels, including sensor power and signal checks.

Troubleshooting Relay Driver Outputs

Diagnosing issues with relay driver outputs, checking voltage and connections.

Troubleshooting Connections to Monitor

Troubleshooting loss of connection to the monitoring system.

Checking Modbus RTU and RS485 Communication

Diagnosing communication problems with Modbus RTU and RS485 interfaces.

Technical Data for SKF IMx-S

Environmental Specifications

Specifications related to the operating environment, size, and weight.

Power Supply Specifications

Details on the power supply requirements and consumption of the IMx-S unit.

Analogue Input Technical Data

Technical specifications for analogue differential inputs.

Digital Input Technical Data

Technical specifications for digital opto-isolated inputs.

Output Specifications

Specifications for relay driver and system relay outputs.

Analogue Measurement Capabilities

Details on the analogue measurement capabilities, including AD conversion.

Digital Measurement Specifications

Technical specifications for digital measurement, including frequency range.

Signal Processing Features

Description of signal processing techniques used by the IMx-S.

Interface Specifications

Information on Ethernet and RS232 service interfaces.

Data Processing Details

Details on the RAM used for data processing.

Miscellaneous Technical Data

Miscellaneous technical details like calibration and certifications.

Quality Control Information

Information about SKF's quality certifications.

SKF IMx-S Drawings and Diagrams

IMx-S 16 Standard Cabinet Drawing

Dimensional drawing of the IMx-S 16 standard cabinet.

IMx-S 16 Stainless Steel Cabinet Drawing

Dimensional drawing of the IMx-S 16 stainless steel cabinet.

IMx-S 32 Cabinet Drawings

Dimensional drawings for IMx-S 32 standard and stainless steel cabinets.

SKF IMx-S Terminal List

A comprehensive list of all terminals on the IMx-S unit.

Electrical Waste Disposal Guidelines

Proper Recycling of Electrical Waste

Guidelines for the proper recycling and disposal of electrical waste.

SKF IMx-S Limited Warranty Information

SKF Limited Warranty Terms and Conditions

Details of the warranty terms, conditions, and periods for SKF products.

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