Pepperl+Fuchs M-LB-2000-System User manual

ISO9001
3
M-LB-(Ex-)2000-System
Surge Protection Barriers
Manual

With regard to the supply of products, the current issue of the following document is applicable:
The General Terms of Delivery for Products and Services of the Electrical Industry, published by the Central
Association of the Electrical Industry (Zentralverband Elektrotechnik und Elektroindustrie (ZVEI) e.V.) in its most
recent version as well as the supplementary clause: "Expanded reservation of proprietorship"
Worldwide
Pepperl+Fuchs Group
Lilienthalstr. 200
68307 Mannheim
Germany
Phone: [phone] - 0
E-mail: [e-mail]
North American Headquarters
Pepperl+Fuchs Inc.
1600 Enterprise Parkway
Twinsburg, Ohio 44087
USA
Phone: [phone]
E-mail: [email protected].com
Asia Headquarters
Pepperl+Fuchs Pte. Ltd.
P+F Building
18 Ayer Rajah Crescent
Singapore 139942
Phone: [phone]
E-mail: [email protected]
https://www.pepperl-fuchs.com

M-LB-(Ex-)2000-System – Surge Protection Barriers
Contents
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1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Content of this Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Target Group, Personnel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Working Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4 Surge Protection Barrier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3 Signal Loops Disconnection for Checking. . . . . . . . . . . . . . . . . . . . . . . 24
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5 Dismounting, Maintenance, and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.1 Signal Loops Disconnection for Checking. . . . . . . . . . . . . . . . . . . . . . . 27
5.2 Disconnection of the Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.3 Dismounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6 Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.1 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.2 Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

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M-LB-(Ex-)2000-System – Surge Protection Barriers
Contents

M-LB-(Ex-)2000-System – Surge Protection Barriers
Introduction
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1 Introduction
1.1 Content of this Document
This document contains information that you need in order to use your product throughout
the applicable stages of the product life cycle. These can include the following:
•Product identification
•Delivery, transport, and storage
•Mounting and installation
•Commissioning and operation
•Maintenance and repair
•Troubleshooting
•Dismounting
•Disposal
The documentation consists of the following parts:
•Present document
•Instruction manual
•Datasheet
Additionally, the following parts may belong to the documentation, if applicable:
•EU-type examination certificate
•EU declaration of conformity
•Attestation of conformity
•Certificates
•Control drawings
•Functional safety manual
•Additional documents
Note
This document does not substitute the instruction manual.
Note
For full information on the product, refer to the instruction manual and further documentation
on the Internet at www.pepperl-fuchs.com.
Note
For specific device information such as the year of construction, scan the QR code
on the device. As an alternative, enter the serial number in the serial number search
at www.pepperl-fuchs.com.

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M-LB-(Ex-)2000-System – Surge Protection Barriers
Introduction
1.2 Target Group, Personnel
Responsibility for planning, assembly, commissioning, operation, maintenance,
and dismounting lies with the plant operator.
Only appropriately trained and qualified personnel may carry out mounting, installation,
commissioning, operation, maintenance, and dismounting of the product. The personnel
must have read and understood the instruction manual and the further documentation.
Prior to using the product make yourself familiar with it. Read the document carefully.
1.3 Symbols Used
This document contains symbols for the identification of warning messages and of informative
messages.
Warning Messages
You will find warning messages, whenever dangers may arise from your actions.
It is mandatory that you observe these warning messages for your personal safety
and in order to avoid property damage.
Depending on the risk level, the warning messages are displayed in descending order
as follows:
Informative Symbols
Action
This symbol indicates a paragraph with instructions. You are prompted to perform an action
or a sequence of actions.
Danger!
This symbol indicates an imminent danger.
Non-observance will result in personal injury or death.
Warning!
This symbol indicates a possible fault or danger.
Non-observance may cause personal injury or serious property damage.
Caution!
This symbol indicates a possible fault.
Non-observance could interrupt the device and any connected systems and plants,
or result in their complete failure.
Note
This symbol brings important information to your attention.

M-LB-(Ex-)2000-System – Surge Protection Barriers
Product Specifications
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2 Product Specifications
2.1 Function
Surge protection barriers protect C&I circuits against voltage surges caused by lightning
or switching operations.
The M-LB-(Ex-)2000 surge protection system offers a large number of surge protection
barriers for a wide variety of applications:
•Protection of 2 signal lines
•Protection of grounded or not grounded signal lines
•Protection of intrinsically safe or non-intrinsically safe circuits
•Protection of circuits with rated voltage of 1 V or 24 V
A big advantage of using the M-LB-(Ex-)2000 surge protection system is that the devices
are only 6.2 mm thick. This means that the space in the switch cabinet can be optimally used.
Their narrow design allows the devices to replace the disconnect terminals in the cross
connect level.
Figure 2.1 Example of surge protection system

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Product Specifications
2.2 Application
The following illustrations show typical applications in connection with isolators
and zener barriers.
Figure 2.2 Example of an application with isolator
Figure 2.3 Example of an application with zener barrier
The surge protection system can also be used to protect field devices in the hazardous area
of zones 0, 1 and 2 resp. 20, 21 and 22. The system components suitable for this application
are marked in blue.
Additional surrounding enclosure
Protected
electrical equipment
Protected
field device
Field side Control side
Surge protection barrier Surge protection barrier Isolator
24 V
2-
1+ 7-
8+
9+
250 Ω
11 +
12-
Power Rail
24 V DC
2
1
3
5
4
2
1
3
5
4
2
1
7
8
x3
Additional surrounding enclosure
Protected
electrical equipment
Protected
field device
Field side Control side
Surge protection barrier Surge protection barrier Zener barrier
24 V
2
1
3
5
4
2
1
3
5
4
Note
For more information on mounting, installation and operation, refer to the following chapters.

M-LB-(Ex-)2000-System – Surge Protection Barriers
Product Specifications
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2.2.1 Surge Protection Barriers for Grounded Signal Lines
Surge protection barriers for grounded signal lines provide a defined protection level from line
to earth by connecting the signal lines to earth via suppressor diodes.
Use this surge protection barrier if the apparatus to be protected is not isolated from earth,
e. g., in the case of applications in a non-hazardous area or for applications with zener barriers,
see Figure 2.3.
Figure 2.4 Example of a surge protection barrier for grounded signal lines
2.2.2 Surge Protection Barriers for Not Grounded Signal Lines
Surge protection barriers for not grounded signal lines are connected with earth via a gas
discharge tube only. This results in a greater insulation voltage from line to earth.
Use these surge protection barriers if the device to be protected is operated in an unearthed
signal loop. Typical applications for this device are galvanically isolated signal loops,
which can be found after isolated barriers or signal conditioners, see Figure 2.2.
The breakdown voltage of the gas discharge tube is less than 500 V AC from line to earth.
Observe the breakdown voltage for insulation tests.
Figure 2.5 Example of a surge protection barrier for not grounded signal lines
M-LB-2144
2
1
3
5
4
M-LB-2142
2
1
3
5
4

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M-LB-(Ex-)2000-System – Surge Protection Barriers
Product Specifications
2.3 Working Voltage
To ensure the best possible protection level, 2 different voltage versions are available.
•Rated voltage U = 24 V DC, maximum continuous operating voltage UC= 30 V DC
The typical area of application for these surge protection barriers are 24 V signal loops,
such as 4 mA …20 mA, digital inputs or digital outputs.
•Rated voltage U = 1 V DC, maximum continuous operating voltage UC=6VDC
These surge protection barriers are optimized for applications with a small voltage increase
in the mV range, such as resistance thermometers, thermocouples or strain gauge bridges.