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mpec SA380-IT User Manual

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SA380-IT User Guide
6 Pinnacle Way, Pride Park, Derby, UK, DE24 8ZS
sales@mpec.co.uk
Sales:
General Enquiries:
enquiries@mpec.co.uk
© MPEC Ltd. 2016 All rights reserved.
No part of this publication may be copied without the prior consent of MPEC.
www.mpec.co.uk
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  • Page 1 SA380-IT User Guide 6 Pinnacle Way, Pride Park, Derby, UK, DE24 8ZS sales@mpec.co.uk Sales: General Enquiries: enquiries@mpec.co.uk © MPEC Ltd. 2016 All rights reserved. No part of this publication may be copied without the prior consent of MPEC. www.mpec.co.uk Contents...

  • Page 2: Table Of Contents

    4) Operation 4.2) SA380-IT Front Panel Indications 4.3) Connecting the SA380-IT with a Computer or Apple device 4.3.1 Connect to a Computer directly using an Ethernet Cable 4.3.2 Connect to an Apple Device directly using a Lightning to Ethernet Cable 4.4.4 Connect via a Local Area Network using Ethernet...

  • Page 3: Explanation Of Symbols

    Disasters caused by foreign bodies, fire, or force majeure. 1.4) Personnel Only personnel familiar with the installation, commissioning and operation of the SA380-IT may work with the SA380-IT. Such personnel mus Read and understand the safety chapter of this document.

  • Page 4: Safe Installation

    Prolonged exposure to, or immersion in water exceeds the SA380-IT Ingress-Protection rating. Under such conditions dielectric withstand voltages cannot be guaranteed. Never install or energise an SA380-IT that appears to be either physically damaged or suffering from water ingress. 1.6) Safe Installation Detailed wiring instructions can be found in section 3.
  • Page 5 An ineffective Earth Loop circuit is unable to verify correct connection of the SA380-IT, hence insulation readings may be incorrect. Only one insulation monitoring device may be used on a single interconnected circuit. Installation of additional monitoring devices will cause each device to "fight" the other, resulting in incorrect readings on both devices.
  • Page 6 Limitations of use in the United Kingdom The following restrictions upon use must be observed when the SA380-IT is deployed on UK rail infrastructure: Never attempt to power the SA380-IT from a DC power source Never attempt to wire any conductors from differing monitored circuits into the same input channel.

  • Page 7: Product Description

    2.1) Product Description The SA380-IT is designed to facilitate the continuous monitoring of circuit voltage and resistance to earth of up to 5 independent circuits. The SA380-IT has built-in communications hardware in the form of a GSM modem and features Ethernet connectivity. This allows the SA380-IT to connect to cloud-based Enterprise Asset Management Systems (EAMS).

  • Page 8: Principles Of Operation

    Periodic monitoring of the hardware and earth connection assures safe and reliable operation. Inside the SA380-IT there is only one single instance of "measurement circuitry", however there are five instances of the "monitored circuit" circuitry (switches and protection resistors).

  • Page 9: Modes Of Operation

    2.3.4 Degraded Modes There are instances when the SA380-IT may suspend some, or all measurements. Degraded modes are applicable in normal and technicians mode and are often due to the activation of device safety interlocks. See section 5.2 for more information.

  • Page 10: System Voltage Measurement

    The SA380-IT utilises the "pulse test" method of resistance to earth measurement. A series of current limited rectangular pulses are injected into the monitored circuit. This will cause a current to flow through any resistance and capacitance to earth.
  • Page 11 The period of time that the SA380-IT can spend performing slow-scans is limited to 50% of total measurement time of the entire SA380-IT device, assuring that the fast-scan process still has time to run.

  • Page 12: Dc Circuits Only

    2.5.2 DC Circuits Only In a DC circuit, the Resistance to earth of each circuit leg can cause current flow from the monitored circuits supply U , through SA380-IT measurement circuitry. For DC sources, such a current will always appear to flow in the same "direction" through the measurement circuit, regardless of measurement pulse polarity.

  • Page 13: Core-To-Core Resistance Effects

    2.6) Core-to-Core Resistance Effects 2.7) Earth Integrity Measurement Every 30 seconds the integrity of the SA380-IT functional earth connection is validated by measuring the resistance between the primary (Functional Earth) and secondary (Loop Earth) earth connections. This gives confidence that the earth connection is "good" and therefore reliable Resistance to Earth measurement of monitored circuits can be conducted.
  • Page 14 The Resistance of the earth loop is measured in a manner very similar to "Resistance to Earth of Monitored Circuits". Equivalent Circuit for Earth Loop Measurement: I = Measurement Pulse Current. Loop Earth = Loop Earth terminal. FE = Functional Earth circuit terminal. V = Measured Voltage (High Impedance).

  • Page 15: Hardware Self-Test

    Hardware self-test is undertaken every 30 seconds. The SA380-IT will report a hardware-fault when the following conditions occur: The SA380-IT is unable to make reliable measurements of insulation resistance. The SA380-IT has detected an internal fault that could impact upon the safety or reliability of the monitored system. The SA380-IT response to these scenarios is as follows: Indicate to the cloud based supervisory system that a hardware fault has occurred.

  • Page 16: Auxiliary Power Supply

    Connection to smaller down-stream earth continuity or earth leakage testers and sensors. 2.9.4 GSM & Ethernet Connection The SA380-IT features an internal GPRS modem with factory fitted SIM, and an Ethernet controller. Configuration of the SA380-IT and reporting of data is possible using both interfaces.

  • Page 17: Protocol Selection

    Two transmission protocols can be selected for sending data to an EAMS: MIMOSA Text based protocol compatible with the Network Rail Intelligent Infrastructure and MPEC Centrix systems. Plain text, human-readable, but large data messages. Lengthy back-off periods (up to 2 hours) in the event of loss of communications.
  • Page 18 Sampling Data is not continuously sampled and sent the EAMS as this would produce a vast amount of data. The SA380-IT employs a sampling scheme that rationalises the amount of data buffered for transmission by employing the following sampling rules.

  • Page 19: Buffering

    9 months of data at a stable installation. Your mileage may vary. Batching When using MIMOSA communication the SA380-IT will hold-off the transmission of data until one of the following conditions becomes true. >= 1024 entries are pending in the queue.

  • Page 20: Examples

    2.10.4 Examples The diagram below shows examples of each type of acquisition: In all cases two acquisitions take place for each event, the initial triggered acquisition, and the subsequent delayed acquisition 60 seconds later. Item Description Acquisition on all channels due to device start-up Acquisition on all channels due to user clearing the message queue Acquisition of U...

  • Page 21: Overview

    Check all fuses / links are removed at the system termination point for each monitored circuit and the SA380-IT power supply prior to installation. Test all wiring before re-inserting any fuses / links.
  • Page 22 The principal connections are as follows: Name Description Supply Power supply to the SA380-IT Functional Earth Common Earth point for all device measurement Loop Earth Secondary Earth point for earth continuity measurement Monitored Circuits The IT circuits that require insulation...

  • Page 23: Physical Installation

    Never install or energise an SA380-IT that appears to be either physically damaged or suffering from water ingress. The SA380-IT is designed to be fitted to BR930 / Q Style relay bar. Alternative mounting arrangements can be made using the hinged...
  • Page 24 Affix the hinged bracket in the desired location using appropriate fixings (not supplied) through the pre-drilled holes at the rear of the hinged bracket. Feed the mounting studs of the SA380-IT through the pre-drilled holes at the front of hinged bracket and secure with the supplied spring washer and M5 nut.

  • Page 25: Termination Of Wiring

    Attempt to rock the device from the front of the enclosure. Check that the device is secure. 3.3) Termination of Wiring It is recommended that terminations into the SA380-IT are made using ferules. Termination of cables onto monitored circuits and power supplies etc. is beyond the scope of this user manual.

  • Page 26: Connection Of Sa380-It Supply

    The SA380-IT requires an AC supply at the "BX" and "NX" supply terminals to operate. The SA380-IT is intended be powered from an AC circuit, however the device will operate when powered from a DC circuit with appropriate voltage. This is not permitted in UK railway signalling systems.

  • Page 27: Connection Of Earth

    Continuity test the "NX" wire end-to-end. The spring-contact plug of the SA380-IT features a test-point. 3.5) Connection of Earth The SA380-IT has two earth termination points. Both must be correctly installed for the device to function. See section 2 for a full description of the function of SA380-IT earth terminals.

  • Page 28: Connection Of Monitored Circuits

    This is the standard method of connection to monitored circuits The SA380-IT device is typically supplied with resistive cables, or they can be purchased separately (see 6.3). The resistive cable features a 47 k series resistor fitted 100 mm from one end of the cable.

  • Page 29: Via Hi Z Outputs

    3.6.2 Via HI Z Outputs It is common to perform monitored circuit functions on the same circuit that is used to power the SA380-IT device. To simplify wiring it is possible to "jumper" across the power supply into "Channel 1" of the monitored circuits. This is achieved by the "HI Z"...
  • Page 30 Using the approved resistive cable (MPEC part No. SA380-IT-RC). Connecting via the BX HiZ and NX HiZ terminals. Never attempt to "common together" any conductors from differing monitored circuits. Never attempt to wire any conductors from differing monitored circuits into the same input channel.

  • Page 31: Connection Of Peripheral Equipment

    Perform an earth test on the monitored circuit prior to commissioning. Test the "B" wire end-to-end. The resistance must read 47 k +/-0.1 %. The spring-contact plug of the SA380-IT features a test-point. Test the "N" wire end-to-end. The resistance must read 47 k +/-0.1 %. The spring-contact plug of the SA380-IT features a test-point.

  • Page 32: Ethernet

    There is zero reception directly above or below the antenna, there is maximal and even reception around the horizontal plane. Test: The GSM connection status of the logger can be casually observed using the SA380-IT status indications. (See section 4.2) In-depth status information can be observed using the web-based configuration and diagnostics application (see section 4.4.4) 3.7.2 Ethernet...

  • Page 33: Volt-Free Contact (Vfc)

    If connecting direct to a computer, simply use an Ethernet patch cable to connect devices point to point. If connecting to an Apple iPad of iPhone you must use the MPEC "Lightning to Ethernet" cable (MPEC Part No. SA380-IT-LE) and have the SA380-IT "App" installation (available on the App-store).

  • Page 34: Auxiliary Power Output

    The output is short-circuit and overload protected. Tools / Parts Required: Ferrules Crimp Tool Action: Connect the SA380-IT 5 V terminal to the positive power terminal of the auxiliary equipment. Connect the SA380-IT 0 V terminal to the negative power terminal of the auxiliary equipment.

  • Page 35: Rs485

    Test With the logger powered, check for 5 V DC across the output terminals. 3.7.5 RS485 The RS485 link is provided to allow data connection to auxiliary sensors and data logging equipment. Tools / Parts Required: Ferrules. Crimp Tool. Action: Wire the RS485 link using twisted pair cable.

  • Page 36: Commissioning

    Apply main power to the SA380-IT. Connect to the SA380-IT using the web based tool (see section 4.3) You may need to set the time on the device if the SA380-IT is unable to locate a time-server using the GSM or Ethernet connections...
  • Page 37 The SA380-IT will not perform any measurements if the time is not set. Perform monitored circuits setup (see section 4.4.8 and 4.4.9). Check alert levels meet your requirements. Please check that the factory set earth loop and insulation resistance alarm levels are correct for your application. (See...

  • Page 38: Sa380-It Front Panel Indications

    Check that the device can connect to the Enterprise Asset Management System (See section 4.4.4). 4) Operation This section details the meaning of the front panel indications and the operation of the web-based interrogation and configuration tool. 4.2) SA380-IT Front Panel Indications Indication Colour...

  • Page 39: Connecting The Sa380-It With A Computer Or Apple Device

    HW FAULT EARTH FAULT are lit. The label on the front of the SA380-IT is for recording useful information about the product: Site Name Write the unique name of the device here such that it matches that of the device configuration.
  • Page 40 The following instruction apply to the "Windows 10" operating system, however the network settings will be the same regardless of operating system. Open Networks & Sharing Center: Change Adapter Settings: On "Local Area Connection", right-click, select "Properties":...
  • Page 41 Select "Internet Protocol Version 4 (TCP/IPv4)", then click "Properties": Use the following IP settings, then click OK:...

  • Page 42: Connect To An Apple Device Directly Using A Lightning To Ethernet Cable

    These settings assume that the SA380-IT resides on the 192.168.100.xxx sub-net. This is the default setting. If the IP address of your SA380-IT has been changed, it should be recorded on the front panel of the device (see 4.2). You may need to change the IP address in the above dialogue box to match the sub-net of your SA380-IT.
  • Page 43 Open the App...
  • Page 44 If your IP is 192.168.100.115 the the web-based configuration and diagnostics tool will load automatically:...
  • Page 45 If the SA380-IT IP address differs from that above, tap the address bar and enter IP address of the SA380-IT as recorded on the front of the device:...
  • Page 46 If the SA380-IT sits outside the 192.168.100.xxx sub-net, then the network settings of the App need to match those of the SA380-IT device. These can be altered by tapping the "Cable" button. Follow the advice in section 4.3.1.
  • Page 47 Intermittent cable connection may make cause your the iOS device to be unable to recognize the Lightning to Ethernet cable any more: Should this happen you need to restart the iOS device and start the application again.

  • Page 48: Connect Via A Local Area Network Using Ethernet

    Computer directly using an Ethernet Cable". (4.3.1) Once your computer is connected to the same LAN as the SA380-IT, enter the static IP of the SA380-IT device, (as written on the front panel), into any HTML 5 compatible web browser: 4.4.5 Connect via GSM Network...

  • Page 49: Navigating The Sa380-It User Interface

    Configuration of private APNs and VPNs is beyond the scope of this user guide. 4.4) Navigating the SA380-IT User Interface 4.4.1 Main Menu You may need to set the time on the device if the SA380-IT is unable to locate a time-server using the GSM or Ethernet connections.
  • Page 50 The SA380-IT will not perform any measurements if the time is not set.

  • Page 51: Live Measurements

    Name Description Each page features a help link to this user Help guide. Site The name of the installation. The unique ID of the device. Device ID Click here to access live measurement Measurement Data readings of monitored circuits. Click here to access live connectivity and Device Status device health information.

  • Page 52: Technicians Modes

    DC Monitored Circuit DC monitored circuits show circuit voltage and equivalent resistance to earth of each circuit leg (R and R Earth Loop Resistance The resistance between FE and Loop Earth terminals. Current Test Displays the test currently being performed by the device at the moment the page refreshed.
  • Page 53 Name Description Navigates back to the live measurements Back screen and terminates technicians mode The name of the monitored circuit. A green Circuit Name & Connection Status dot indicates a live connection to the device. A red dot denotes that the connection has been lost.

  • Page 54: Device Status

    Ethernet as a communications bearer. Upon power-up, the SA380-IT will attempt to connect over GSM. If this fails, or if GSM is not configured, the device will attempt to connect over Ethernet. If the connection attempt over Ethernet is...
  • Page 55 MIMOSA protocol, the device can reside in a prolonged "back-off" state for up to 4 hours. During this period the SA380-IT will not attempt re-connection. If connection remains "red" for more than 10 minutes in the case of the MPEC...
  • Page 56 0.0.0.0: Unable to create a GPRS session. Valid IP Address: GPRS session successfully established. The SA380-IT does not support DHCP, and Ethernet IP can therefore not request an IP from another device. The Ethernet IP address is "static" and assigned by the user through configuration.

  • Page 57: Utilities

    Please contact MPEC or your line manager to obtain the correct credentials. Back Navigates back to the main menu. Pause Data Collection / This toggles the SA380-IT between suspe nded mode normal mode (see Resume Data Collection section 2.3). The SA380-IT will not attempt any...

  • Page 58: Upgrade Firmware

    The data will be permanently lost. Set Time From Browser The SA380-IT requires the time to be set before measurement can commence. This is normally done through connection to time server. In the event that a time server is unavailable the time can manually be set using this feature.

  • Page 59: Settings

    Click here to commence upgrade. A progress bar will display firmware upload progress. Once upload is complete the SA380-IT will restart to apply the upgrade. Accidental termination of firmware upgrade will not harm the SA380-IT, however I reboot...

  • Page 61: Monitored Circuit Settings

    Auto Detect Circuits Click here to perform automated configuration of all monitored circuits Advanced Opens the "Advanced" settings menu. The SA380-IT default settings have been carefully chosen to be for most installations. Modify "advanced" settings with caution. 4.4.8 Monitored Circuit Settings EAMS = Enterprise Asset Management System.

  • Page 62: Auto Detect Circuits

    Voltage The nominal voltage of the monitored circuit. Setting the voltage to "0" will disable this circuit. The monitored circuit voltage is used to set over-voltage thresholds. Incorrectly setting this value could lead to a dangerous situation in the event of failure. AC/DC Click here to configure the circuit as an AC or DC circuit.
  • Page 63 Name Description Auto Detect will clear device interlocks Ensure that you have exhausted all fault finding tasks prior to manually resetting any device interlock (see section 5.2) Back Navigates back to the Settings menu...

  • Page 64: Advanced

    For most applications, running and verifying the result of the Auto-Detect output is all that is required to configure the SA380-IT. The SA380-IT will measure each monitored circuit in turn and set-up the channel to one of the following based upon the measured voltage:...
  • Page 65 Description Back Navigates back to the Settings menu. Device Id The unique ID of this SA380-IT, used to identify the device with the EAMS. This is set at factory and cannot be changed. Manufacturer Id The MIMOSA manufacturer ID assigned to MPEC Technology Ltd by the MIMOSA foundation.
  • Page 66 The name of the GSM access point the SA380-IT is to connect to. It is set-up by the SIM provider. APN Username Many GSM Access Points require username and password authentication to allow connection. Change these here. APN Password Many GSM Access Points require username and password authentication to allow connection.
  • Page 67 Ethernet Net Mask The IP Sub-net mask to allow sharing of IP addresses. Ethernet Default Route The default route out of the SA380-IT to the Internet. Primary DNS Server Primary domain name server to perform IP address look-up.

  • Page 68: About

    Manufacturers copyright. 5) Faulting & Maintenance The SA380-IT is designed to require minimal maintenance, with an anticipated product lifespan of 15 years. To maintain safe operation of the device over its service life, the following faulting and maintenance activities are recommended.

  • Page 69: Faulting Device Interlocks

    Always investigate the cause of a device interlock before manually clearing it down. Clearing down a device interlock is unlikely to put the SA380-IT into a dangerous state, as the same self-checks that enabled the interlock will re-enable the same interlock if the fault persists. Self-clearing device interlocks will automatically clear as soon as the fault is removed.

  • Page 70: Specification

    Internal measurement Extreme temperature event. None. circuit fault. If device interlocks persist after fault finding actions have been exhausted the SA380-IT should be removed from service and returned to MPEC for investigation. 6) Technical Data 6.1) Specification Insulation Coordination to EN50124-1 & EN60101-1...
  • Page 71 *Accuracy de-rated to -5% to +6% in the presence of strong radiated EM fields at 20 V/m at 800 MHz to 1 GHz and 10 V/m at 1.4 GHz to 2 GHz. A typical mobile digital telecommunications device must be placed within 20 mm of the SA380-IT enclosure to experience these levels.
  • Page 72 10/100 Mbs Auto MDIX *Ethernet is ordinarily for use as a monitoring port only. Ethernet port requires additional surge protection when used as a permanent connection. Supported Protocols MPEC RailDaq Ethernet TCP/IP Port 7777 Efficient Data Communications TCP/IP Port 7777...

  • Page 73: Mechanical

    SA380-IT-SD Monitor Device. With plug couplers and cables (SA380-IT-NR + SA380-IT-KT + GSM Antenna) SA380-IT Spare Connector Set SA380-IT-CN SA380-IT 47K Resistive Cable - 3 meters SA380-IT-RC SA380-IT Lightning to Ethernet Cable SA380-IT-LE SA380-IT Hand-held Configuration and SA380-IT-CD Diagnostics Device...
  • Page 74 6 Way 5 mm Pitch Connector 6 Way 3.5 mm Pitch Connector 3 m Resistive Cable 6 m grey A1 0.75 mm signalling cable SA380-IT-SD: Orders over 10 units will be shipped with 1 complimentary Ethernet-to-Lightning cable for every full 10 units ordered.

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