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Eaton Crouse-Hinds Series Instruction Manual

Isolating interface units
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Instruction manual
MTL intrinsic safety solutions
MTL4500/4600 range
Isolating interface units
DRAFT - 22 March 2018
March 2018
INM 4500/4600 Rev 12

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Summary of Contents for Eaton Crouse-Hinds Series

  • Page 1 DRAFT - 22 March 2018 Instruction manual March 2018 MTL intrinsic safety solutions INM 4500/4600 Rev 12 MTL4500/4600 range Isolating interface units...

  • Page 2: Declaration Of Conformity

    DRAFT - 22 March 2018 DECLARATION OF CONFORMITY A printed version of the Declaration of Conformity has been provided separately within the original shipment of goods. However, you can find a copy of the latest version at: http://www.mtl-inst.com/certificates INM 4500/4600 Rev 12...

  • Page 3: Table Of Contents

    DRAFT - 22 March 2018 CONTENTS DECLARATION OF CONFORMITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II IMPORTANT NOTE .
  • Page 4 Table B - Maximum cable parameters - IIC gas group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67 © 2017 Eaton Electric Limited. All rights reserved.

  • Page 5: Important Note

    DRAFT - 22 March 2018 IMPORTANT NOTE This manual describes the installation and use of: • MTL4500 range of isolating interfaces for Intrinsic Safety • MTL4600 range of signal conditioners The MTL4500 range of products are intended for protection of hazardous areas in process plants that apply Intrinsic Safety techniques.

  • Page 6: Atex Safety Instructions

    DRAFT - 22 March 2018 ATEX SAFETY INSTRUCTIONS The following information is in accordance with the Essential Health and Safety Requirements (Annex II) of the EU Directive 2014/34/EU [the ATEX Directive - safety of apparatus] and is provided for those locations where the ATEX Directive is applicable. General a) This equipment must only be installed, operated and maintained by competent personnel.
  • Page 7 DRAFT - 22 March 2018 Inspection and maintenance a) Inspection and maintenance should be carried out in accordance with European, national and local regulations which may refer to the IEC standard IEC 60079-17. In addition specific industries or end users may have specific requirements which should also be met.
  • Page 8 DRAFT - 22 March 2018 This page left intentionally blank viii INM 4500/4600 Rev 12...

  • Page 9: Introduction

    DRAFT - 22 March 2018 INTRODUCTION 1 .1 General This instruction manual describes the procedures for installing, connecting, checking and maintaining MTL4500/4600 range of isolating interfaces and accessories. The MTL4500 products provide an intrinsically safe (IS) interface to a hazardous area of a process plant, while the MTL4600 range is exclusively for non-hazardous area service.
  • Page 10 DRAFT - 22 March 2018 The table below lists the related products in the MTL4500/4600 ranges. Please refer to the MTL4500 data provided in this manual for both ranges. Any variation from the MTL4500 specification is indicated. Refer also to the individual MTL4500 and MTL4600 data sheets. MTL4500/4600 modules Digital Input Channels...

  • Page 11: Mtl4500 Range Description

    I/O modules, not the backplane. This means that non-hazardous area backplanes can be produced easily by Eaton, or the user, and can be designed to match exactly the size, shape, method of mounting, type of connector, pin assignments, etc, of a particular process system.
  • Page 12 DRAFT - 22 March 2018 CPS24 28.5 9 1 0 11 12 13 14 15 16 CPS16 CPS04 28.5 MTL45XX CPS08 Figure 4 .1: Standard backplanes with dimensions INM 4500/4600 Rev 12...

  • Page 13: Backplane Installation

    DRAFT - 22 March 2018 BACKPLANE INSTALLATION 4 .1 Backplane mounting See Figure 4.1 for dimensions and mounting centres and Table 4.1 for a listing of the mounting options and the kits and accessories applicable to MTL standard backplanes. Table 4 .1: Backplanes, mounting kits and accessories Backplane Number Safe-area...

  • Page 14: Identification And Tagging

    DRAFT - 22 March 2018 b) With reference to Figure 4.3, clip the appropriate number of mounting feet (7) to the DIN rail (8) at centres ‘A’ (4 for each 4/8-way, 6 for each 16-way and 8 for each 24-way backplane) (Figure 4.3).
  • Page 15 DRAFT - 22 March 2018 Colour Module no . Function MTL4501-SR Yellow MTL4504 Digital Inputs White MTL451x MTL452x Digital Outputs Blue MTL4531/33 Vibration Purple MTL4532 Pulse MTL4541x Blue Analogue Inputs MTL4544x MTL4546x Green Analogue Outputs MTL4549x Blue MTL456x Fire & Smoke MTL457x Orange Temperature inputs...

  • Page 16: Backplane Earth Rails

    DRAFT - 22 March 2018 4 .3 Backplane earth rails Optional earth rails are available for 8- and 16-way backplanes (kits ERK08 and ERK16 respectively). Cable screens from hazardous-area circuits, or spare pairs from a multicore cable, can be connected to the terminals on the earth rails, which are mounted on the backplane at about the same height as the front of the modules, close to the hazardous- area connectors.
  • Page 17 DRAFT - 22 March 2018 4 .4 .2 Safe-area - signal connections Each module position is provided with a 6-way split-level terminal block for safe-area signals. The six terminals reproduce the module terminals numbered 7 to 12 as shown in Figure 4.9. Figure 4 .9: view Terminal pin...

  • Page 18: Backplanes - Customised

    4.0A (FUS4.0ATE5 fuse kit) 4 .5 Backplanes – customised For information about installing customised backplanes (whether supplied by Eaton or by a third party), see the separate instructions provided with the units. 4 .6 Backplanes - module clip replacement Any broken module retaining clips must be replaced to maintain safe operation. Clips are constructed in moulded strips of four and are secured to the backplane with plastic rivets.

  • Page 19: Installation - Modules

    • Refer to the certificate/catalogue for clarification of any aspects of intrinsic safety or contact Eaton’s MTL product line or your local representative for assistance. • Make sure the correct hazardous-area connector (field-wiring plug) is plugged into the corresponding isolator. It is recommended that the connector is identified by the same tag number as the matching isolator.

  • Page 20: Modules - Installation

    DRAFT - 22 March 2018 Figure 5 .2: Backplane orientations when mounted in cabinets Clearly, the temperature of the air surrounding the cabinet must also be considered. In a control room environment with control and maintenance staff present, this should be reasonably well defined, but other locations may require additional shielding to reduce the exposure to excess heat or cold.
  • Page 21 DRAFT - 22 March 2018 5 .2 .3 Finishing Connect individual isolators in accordance with wiring schedules. Ensure hazardous- and safe-area wiring is segregated into separate trunking or looms and maintain a tidy installation. Use an MTL4599 dummy isolator to provide termination and earthing for unused cores from the hazardous area.

  • Page 22: Unit Descriptions, Setting-Up And Connections

    DRAFT - 22 March 2018 UNIT DESCRIPTIONS, SETTING-UP AND CONNECTIONS This section describes the function (briefly), the setting-up procedure and the wiring connections for each MTL4500 range of unit. For a fuller functional description and a detailed technical specification, refer to the individual datasheets, which can be found on our website at http://www.mtl-inst.com or in the current MTL IS catalogue.

  • Page 23: Digital Input Modules

    DRAFT - 22 March 2018 6 .1 Digital Input modules The Digital Input (DI) module range offers solid state or relay output switches in a safe area that respond to input switches located in a hazardous area. Single or multiple channel (2 or 4) options are available, as well as Line-Fault Detection (LFD).

  • Page 24: Mtl4501-Sr - Fail-Safe Switch/Proximity Detector Interface

    DRAFT - 22 March 2018 6 .1 .3 MTL4501-SR - Fail-safe Switch/Proximity detector interface Single channel, fail-safe module with line-fault detection The MTL4501-SR enables a fail-safe switch/proximity detector located in the hazardous area to control an isolated fail-safe electronic output. It provides line-fault detection (LFD) alarm contacts and is designed for use with approved fail-safe sensors in loops that require operation up to SIL3 according to the functional safety standard IEC 61508.

  • Page 25: Mtl4504 - Switch/Proximity Detector Interface

    MTBF information for the LFD relay is available from Eaton to allow the failure rate for the LFD relay to be calculated when used in the critical path with the output relay for safety critical applications.

  • Page 26: Mtl4510 & Mtl4510B - Switch/Proximity Detector Interface

    DRAFT - 22 March 2018 6 .1 .5 MTL4510 & MTL4510B - Switch/Proximity detector interface 4-channel, digital input and multifunction modules These digital modules provide solid state output switches in a safe area that respond to switches (inputs) located in a hazardous area. The way they respond - their “mode” - can be configured using a bank of four DIL selector switches accessible through the side of the module - see Figure 6.5.
  • Page 27 DRAFT - 22 March 2018 Figure 6 .5: DIL switches for setting 1 2 3 4 MODE OFF position ON position Tables 6.1 and 6.2 show details of the modes available and the switch settings required to obtain them.For ease of access, it is recommended that switches are set to the required mode before installation.Table 6.1 indicates whether the output follows the input, or the output is the reverse or antiphase of the input.
  • Page 28 DRAFT - 22 March 2018 MTL4510B modes The following logic and timing diagrams are provided to assist the user in understanding the behaviour of the MTL4510B module when a specific mode is chosen. The open switch ( ) and closed switch ( ) symbols are used to represent both the input conditions of Ch A, Ch B, Ch C or Ch D and then the output conditions of o/p 1, 2, 3 or 4.
  • Page 29 DRAFT - 22 March 2018 MTL4510B modes - continued Mode 9: 2 ch with line fault output Mode 10: As mode 9 with line fault c/o i/p - Ch A i/p - Ch A Line Line Line Line fault fault fault fault fault...

  • Page 30: Mtl4511 - Switch/Proximity Detector Interface

    DRAFT - 22 March 2018 6 .1 .6 MTL4511 - Switch/Proximity detector interface Single channel, with line-fault detection The MTL4511 contains a changeover relay, which enables a safe-area load to be controlled by a switch or proximity detector located in a hazardous-area. When selected, the line-fault detect (LFD) facility detects open or short circuit conditions in the field wiring and also indicates this on the top of the module.

  • Page 31: Mtl4513 - Switch/Proximity Detector Interface

    DRAFT - 22 March 2018 6 .1 .7 MTL4513 - Switch/Proximity detector interface Two-channel, with line-fault detection and phase reversal The MTL4513 enables two solid-state outputs in the safe area to be controlled by two switches or proximity detectors located in the hazardous area. The Ch1/Ch2 output transistors share a common terminal and can switch +ve or –ve polarity signals.

  • Page 32: Mtl4514/Mtl4514B/Mtl4514D - Switch/Proximity Detector Interface

    DRAFT - 22 March 2018 6 .1 .8 MTL4514/MTL4514B/MTL4514D - Switch/Proximity detector interface Single channel, with line-fault detection and phase reversal The MTL4514 and MTL4514B enables a safe-area load to be controlled, through a relay, by a proximity detector or switch located in a hazardous area. Line faults are signalled through a separate relay and indicated on the top of the module.

  • Page 33: Mtl4514N - Switch/Proximity Detector Interface

    DRAFT - 22 March 2018 6 .1 .9 MTL4514N - Switch/Proximity detector interface Single channel, with line-fault detection with passthrough and phase reversal The MTL4514N is designed to work with system inputs which monitor the impedance of the field circuit in order to detect line faults. Low and high impedance states reflect a switch closed or open in the field.

  • Page 34: Mtl4516 - Switch/Proximity Detector Interface

    DRAFT - 22 March 2018 6 .1 .10 MTL4516 - Switch/Proximity detector interface Two channel, with line-fault detection and phase reversal - normally-open contacts The MTL4516 contains two normally-open contact relays, which enable two safe-area loads to be controlled by switches or proximity detectors located in a hazardous-area. When selected, the line-fault detect (LFD) facility detects open or short circuit conditions in the field wiring and also indicates this on the top of the module.

  • Page 35: Mtl4516C - Switch/Proximity Detector Interface

    DRAFT - 22 March 2018 6 .1 .11 MTL4516C - Switch/Proximity detector interface Two channel, with line-fault detection and phase reversal - changeover contacts The MTL4516C contains two changeover relays, which enable two safe-area loads to be controlled by switches or proximity detectors located in a hazardous-area. When selected, the line-fault detect (LFD) facility detects open or short circuit conditions in the field wiring and also indicates this on the top of the module.

  • Page 36: Mtl4517 - Switch/Proximity Detector Interface

    DRAFT - 22 March 2018 6 .1 .12 MTL4517 - Switch/Proximity detector interface Two channel, with line-fault detection and phase reversal The MTL4517 enables two safe-area loads to be controlled, through a relay, by switches or proximity detectors located in a hazardous-area. When selected, the line-fault detect (LFD) is signalled through a separate relay and indicated on the top of the module.

  • Page 37: Digital Output Modules

    DRAFT - 22 March 2018 6 .2 Digital Output modules The single channel Digital Output (DO) module range enables on/off devices in a hazardous area to be controlled from the safe area. Some units are loop powered while others enable solid-state switching by providing independent power supplies.

  • Page 38: Mtl4523/Mtl4523R - Solenoid Alarm Driver

    DRAFT - 22 March 2018 6 .2 .2 MTL4523/MTL4523R - Solenoid Alarm driver Single channel, with line-fault detection, IIC The MTL4523 interface controls an on/off device in a hazardous area using a volt-free contact or logic signal in the safe area, and is suitable for driving loads such as solenoids. Line-Fault Detection (LFD) operates independently of the output state and is signalled by a safe-area, solid-state switch output which, when a field line is open or short-circuited, becomes de-energised in the MTL4523, and energised in the MTL4523R.

  • Page 39: Mtl4523L - Solenoid Alarm Driver

    DRAFT - 22 March 2018 6 .2 .3 MTL4523L - Solenoid Alarm driver Single channel, loop-powered with line-fault detection, IIC The MTL4523L interface controls an on/off device in a hazardous area using a voltage signal in the safe area, and is suitable for driving loads such as solenoids. Line-Fault Detection (LFD) operates only when the output is energised and is signalled by a safe-area solid-state switch which, when a field line is open or short-circuited, becomes energised.

  • Page 40: Mtl4523V/Mtl4523Vl - Solenoid Alarm Driver

    DRAFT - 22 March 2018 6 .2 .4 MTL4523V/MTL4523VL - Solenoid Alarm driver Single channel, voltage controlled with line-fault detection, IIC With the MTL4523V or MTL4523VL interface, an on/off device in a hazardous area can be controlled by a voltage signal in the safe area. It is suitable for driving loads such as solenoids.

  • Page 41: Mtl4524 - Solenoid Alarm Driver

    DRAFT - 22 March 2018 6 .2 .5 MTL4524 - Solenoid Alarm driver Single channel, switch operated with override, IIC The MTL4524 enables an on/off device in a hazardous area to be controlled by a volt-free contact or logic signal in the safe area. It can drive loads such as solenoids, alarms, LEDs and other low power devices that are certified as intrinsically safe or are classified as non- energy-storing simple apparatus.

  • Page 42: Mtl4524S - Solenoid Alarm Driver

    DRAFT - 22 March 2018 6 .2 .6 MTL4524S - Solenoid Alarm driver Single channel, switch operated with 24V override, IIC The MTL4524S enables an on/off device in a hazardous area to be controlled by a volt- free contact or a floating logic signal in the safe area. It can drive loads such as solenoids, alarms, LEDs and other low power devices that are certified as intrinsically safe or are classified as non-energy-storing simple apparatus.

  • Page 43: Mtl4525 - Solenoid Alarm Driver

    DRAFT - 22 March 2018 6 .2 .7 MTL4525 - Solenoid Alarm driver Single channel, switch operated with override, IIC The MTL4525 enables an on/off device in a hazardous area (IIC gas group) to be controlled by a volt-free contact or logic signal in the safe area. It can drive loads such as solenoids, alarms, LEDs and other low power devices that are certified as intrinsically safe or are classified as non-energy-storing simple apparatus.

  • Page 44: Mtl4526 - Switch Operated Relay

    DRAFT - 22 March 2018 6 .2 .8 MTL4526 - Switch operated relay Two channel, IS output The MTL4526 enables two separate IS circuits in a hazardous area to be relay-contact controlled by two on-off switches or logic signals in a safe area. Applications include the calibration of strain-gauge bridges;...

  • Page 45: Pulse And Vibration Modules

    DRAFT - 22 March 2018 6 .3 Pulse and Vibration modules Single and dual channel modules are available to transfer vibration probe signals from a hazardous area to a safe one. Similarly, pulses from a switch, proximity detector, current pulse transmitter or voltage pulse transmitter, located in the hazardous area, can be safely transferred to the safe area.

  • Page 46: Mtl4532 - Pulse Isolator

    DRAFT - 22 March 2018 6 .3 .2 MTL4532 - Pulse Isolator Pulse & 4/20mA current outputs The MTL4532 isolates pulses from a switch, proximity detector, current pulse transmitter or voltage pulse transmitter located in a hazardous area. It is ideal for applications involving high pulse rates and fast response times, by repeating the pulses into the safe area, and the transistors used on the pulse output will switch +ve or –ve polarity signals.
  • Page 47 DRAFT - 22 March 2018 Switch input operation If switch contacts are used for this Pulse Input (terminals 1 & 2), then series and parallel resistors must be fitted - see Section 6.1.2 for recommended values. Simple or Legacy mode - SW4 - OFF If simple “pulse-in/pulse-out”...

  • Page 48: Mtl4533 - Vibration Transducer Interface

    DRAFT - 22 March 2018 6 .3 .3 MTL4533 - Vibration Transducer Interface WARNING! Note: This module has been terminated and not available for use on new projects. For existing applications spacing of one module position between active modules must be implemented to ensure reliable operation. Two channel The MTL4533 repeats signals from vibration sensors in a hazardous area, providing outputs for monitoring systems in the safe area.

  • Page 49: Analogue Input Modules

    DRAFT - 22 March 2018 6 .4 Analogue Input modules The analogue input (AI) modules support 2-wire or 3-wire 4/20mA or HART transmitters located in a hazardous area; repeating the current in other circuits to drive safe-area loads. 6 .4 .1 MTL4541/MTL4541S/MTL4541Y - Repeater Power Supply Single channel, 4/20mA, HART®...

  • Page 50: Mtl4541A/Mtl4541As/Mtl4541Ya - Current Repeater

    DRAFT - 22 March 2018 6 .4 .2 MTL4541A/MTL4541AS/MTL4541YA - Current Repeater Single channel, 4/20mA, passive input for HART® transmitters The MTL4541A provides an input for separately powered 4/20mA transmitters and also allows bi-directional transmission of HART communication signals superimposed on the 4/20mA loop current.

  • Page 51: Mtl4541B/Mtl4541P/Mtl4541T - Repeater Power Supply

    DRAFT - 22 March 2018 6 .4 .3 MTL4541B/MTL4541P/MTL4541T - Repeater Power Supply Single channel, 4/20mA, HART® for 2- or 3-wire transmitters These modules are intended for use as replacements for previous MTL4000 range of modules on existing backplane installations. They provide a fully-floating dc supply for energising a conventional 2- or 3-wire 4/20mA transmitter located in a hazardous area, and repeat the current in another circuit to drive a safe-area load.

  • Page 52: Mtl4544/Mtl4544S - Repeater Power Supply

    DRAFT - 22 March 2018 6 .4 .4 MTL4544/MTL4544S - Repeater Power Supply Two channel, 4/20mA, HART® for 2- or 3-wire transmitters The MTL4544 is intended for use as a replacement for a previous MTL4000 range of modules on existing backplane installations. It provides fully-floating dc supplies for energising two conventional 2-wire or 3-wire 4/20mA or HART transmitters located in a hazardous area, and repeats the current in other circuits to drive two safe-area loads.

  • Page 53: Mtl4544A/Mtl4544As - Current Repeater

    DRAFT - 22 March 2018 6 .4 .5 MTL4544A/MTL4544AS - Current Repeater Two channel, 4/20mA, passive input for HART® transmitters The MTL4544A provides inputs for separately powered 4/20mA transmitters and also allows bi-directional transmission of HART communication signals superimposed on the 4/20mA loop current.

  • Page 54: Mtl4544B - Repeater Power Supply

    DRAFT - 22 March 2018 6 .4 .6 MTL4544B - Repeater Power Supply Two channel, 4/20mA, HART® for 2- or 3-wire transmitters The MTL4544B is intended for use as a replacement for a previous MTL4000 range of modules on existing backplane installations. It provides fully-floating dc supplies for energising two conventional 2-wire or 3-wire 4/20mA or HART transmitters located in a hazardous area, and repeats the current in other circuits to drive two safe-area loads.

  • Page 55: Mtl4544D - Repeater Power Supply

    DRAFT - 22 March 2018 6 .4 .7 MTL4544D - Repeater Power Supply Single channel, 4/20mA, HART® for 2- or 3-wire transmitters, two outputs The MTL4544D provides a fully-floating dc supply for energising a conventional 2- or 3-wire 4/20mA transmitter located in a hazardous area, and repeats the current in other circuits to drive two safe-area loads.

  • Page 56: Analogue Output Modules

    DRAFT - 22 March 2018 6 .5 Analogue Output modules The analogue output (AO) modules accept 4/20mA floating signals from safe-area controllers to drive current/pressure converters (or any other load up to 800 ) in a hazardous area. 6 .5 .1 MTL4546/MTL4546C/MTL4546S/MTL4546Y/MTL4545Y - Isolating Driver Single channel, 4/20mA, HART®...

  • Page 57: Mtl4549/Mtl4549C/Mtl4549Y - Isolating Driver

    DRAFT - 22 March 2018 6 .5 .2 MTL4549/MTL4549C/MTL4549Y - Isolating Driver Two channel, 4/20mA, HART® for valve positioners with line-fault detection The MTL4549 accepts 4/20mA floating signals from safe-area controllers to drive 2 current/pressure converters (or any other load up to 800 ) in a hazardous area. For HART valve positioners, the module also permits bi-directional transmission of digital communication signals so that the device can be interrogated either from the operator station or by a hand-held communicator.

  • Page 58: Fire And Smoke Interface Modules

    DRAFT - 22 March 2018 6 .6 Fire and Smoke Interface modules Interfaces for use with conventional fire and smoke detectors located in hazardous areas. 6 .6 .1 MTL4561 - Fire and Smoke Detector Interface Two channel The MTL4561 is a loop-powered 2–channel interface for use with conventional fire and smoke detectors located in hazardous areas.

  • Page 59: Temperature Input Module

    DRAFT - 22 March 2018 6 .7 Temperature Input modules These modules accept inputs from low-level dc sources such as thermocouples or RTDs in hazardous areas and convert them into 4/20mA signals to drive safe area loads. Thermocouples early burnout detection (EBD) When EBD is selected, the resistance of the thermocouple circuit is monitored and an alarm is raised when there is an increase of more than 50 .

  • Page 60: Mtl4573 - Temperature Converter

    DRAFT - 22 March 2018 6 .7 .1 MTL4573 - Temperature Converter Single channel, THC or RTD input The MTLx573 converts a low-level dc signal from a temperature sensor mounted in a hazardous area into a 4/20mA current for driving a safe-area load. Software selectable features include linearisation, ranging, monitoring, testing and tagging for all thermocouple types and 2-, 3- or 4-wire RTDs.

  • Page 61: Mtl4575 - Temperature Converter

    DRAFT - 22 March 2018 6 .7 .2 MTL4575 - Temperature Converter Single channel, THC or RTD input with alarm The MTL4575 converts a low-level dc signal from a temperature sensor mounted in a hazardous area into a 4/20mA current for driving a safe-area load. Software selectable features include linearisation, ranging, monitoring, testing and tagging for all thermocouple types and 2, 3 or 4-wire RTDs.

  • Page 62: Mtl4576-Rtd - Temperature Converter

    DRAFT - 22 March 2018 6 .7 .3 MTL4576-RTD - Temperature Converter Two channel, RTD/potentiometer input The MTL4576-RTD converts signals from resistance temperature detectors (RTDs) mounted in a hazardous area, into 4/20mA currents for driving safe-area loads. The MTL4576-RTD is compatible with 2- and 3-wire RTD inputs. Performance features, including input type and characterisation, ranging, monitoring, testing and tagging are selected using PCS45 software, which is loaded onto a personal computer and connected via the PCL45USB serial link - see Section 6.9.

  • Page 63: Mtl4576-Thc - Temperature Converter

    DRAFT - 22 March 2018 6 .7 .4 MTL4576-THC - Temperature Converter Two channel, mV/THC input The MTL4576-THC converts low-level dc signals from temperature sensors mounted in a hazardous area, into 4/20mA currents for driving safe-area loads. The hazardous area connections include cold-junction compensation and do not need to be ordered separately.

  • Page 64: Mtl4581 - Mv/Thermocouple Isolator

    DRAFT - 22 March 2018 6 .7 .5 MTL4581 - mV/Thermocouple Isolator Single channel, mV/THC input for low power signals The MTL4581 takes a low-level dc signal from a voltage source in a hazardous area, isolates it, and passes it to a receiving instrument located in the safe area. The module is intended for use with thermocouples utilising external cold-junction compensation.

  • Page 65: General Modules

    DRAFT - 22 March 2018 6 .8 General modules These are general purpose modules that have applications associated with the MTL4500 range of modules. 6 .8 .1 MTL4599 - Dummy Isolator The primary function of the MTL4599, is to provide termination and earthing facilities for unused cable cores from hazardous areas, that can occur, for example, if any MTL4500 module has been removed for maintenance purposes.

  • Page 66: Pcs45/Pcl45Usb Configurator For Mtl Temperature Converters

    It is not permitted to connect the PCL45USB to any device other than one approved by Eaton. Authorisation is valid provided that the converter type is named on the PCL45USB certificate or if the PCL45USB is specified on the converter certificate. Repairs to the PCL45USB are not permitted.

  • Page 67: Fault Finding And Routine Maintenance

    DRAFT - 22 March 2018 FAULT FINDING AND ROUTINE MAINTENANCE WARNING! On removal, take care that a hazardous-area connector is not laid in a position in which it may inadvertently come into contact with the backplane or with components on the backplane. 7 .1 Maintenance precautions Most Codes of Practice for intrinsic safety permit live maintenance on intrinsically safe...
  • Page 68 NOT attempt to make repairs or modifications as these may affect the intrinsic safety of the module. All faulty units should be returned to the Eaton’s MTL product line or representative from which they were purchased, for repair or replacement.

  • Page 69: Bench Testing Modules

    DRAFT - 22 March 2018 BENCH TESTING MODULES The following methods have been devised to permit the user to perform simple module tests on the bench and confirm basic in put to output operation. Field units that do not perform as described below, or modules that have ‘unusual’...

  • Page 70: Digital Output (Do) Modules

    DRAFT - 22 March 2018 8 .2 Digital Output (DO) modules Apply tests per channel. 8 .2 .1 Loop powered: - MTL4521 & MTL4521L, MTL4521Y & MTL4523L Figure 8 .2: Vs– Loop powered DO test circuit – 1. Connect a voltmeter between the + & – output terminals of the module, observing polarity. 2.

  • Page 71: Analogue Input (Ai) Modules

    DRAFT - 22 March 2018 8 .3 Analogue Input (AI) Modules All of these tests compare the output current with the input current (A1) over the normal range of operation, and measure the “error current” i.e. the difference - as indicated on A2. Apply these tests per channel, as appropriate.
  • Page 72 DRAFT - 22 March 2018 8 .3 .3 Modules: MTL4541A, MTL4541YA & MTL4544A – Figure 8 .7: 10kW lin. AI test circuit #3 – “active i/p” 250W – – Output Measurements 1. Adjust RV1 to vary the current (A1) through the range 4 to 20mA. 2.

  • Page 73: Analogue Output (Ao) Modules

    Simple tests to verify their basic operation can be devised for other modules (e.g. temperature, pulse, vibration, etc). If any assistance is required for the testing of a particular module, please contact the technical support department at Eaton for advice. INM 4500/4600 Rev 12...

  • Page 74: Applications Involving Zone 2 And/Or Zone 22 Hazardous Areas

    In general, meeting the relevant requirements of the appropriate European (CENELEC) standards is considered the most appropriate method of demonstrating compliance with the ATEX directive. However, Eaton often has its products approved by other national bodies, such as FM and CSA and, because national, European, and international standards are converging, it is generally possible to use other national approvals as supporting evidence for the ATEX Technical File.

  • Page 75: Appendix

    DRAFT - 22 March 2018 APPENDIX: Table A - Safety descriptions Table B - Maximum cable parameters - IIC gas group Terminals/ Group/Groupe/Gruppe/Grupo Terminals/ Bornes/ Bornes/ Klemme/ Model No . (mA) (mW) Klemme/ Terminales Terminales Model No . (µF) (mH) (µH/Ω) MTL4501-SR ±9.7...
  • Page 76 MTL Instruments GmbH, Heinrich-Hertz-Str. 12, 50170 Kerpen, Germany UNITED ARAB EMIRATES Cooper Industries/Eaton Corporation Tel: +49 (0)22 73 98 12 - 0 Fax: +49 (0)22 73 98 12 - 2 00 Office 205/206, 2nd Floor SJ Towers, off. Old Airport Road, E-mail: csckerpen@eaton.com...

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