Serviceline Industrial Sensors
Serviceline Explosion Protection

Protection Module M-LB-Ex-5142

  • Surge protection for 2 signal lines
  • Nominal voltage 24 V DC
  • Protection module for non-grounded signal lines
  • Max. surge current (8/20 µs) 20 kA
  • Uninterruptable operation (auto reset)
  • Mounting on base module, pluggable
  • Up to SIL 3 acc. to IEC 61508

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH, also apply to Pepperl+Fuchs AG.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  M-LB-Ex-5142

Product Description
Protection module for 2 signal lines
General specifications
Number of protected signal lines2
Functional safety related parameters
Safety Integrity Level (SIL)SIL 3
Electrical specifications
Connectionprotected area: terminals 3, 4
unprotected area: terminals 1, 2
Rated current500 mA , restrictions see derating characteristics
Leakage current< 3 µA at 24 V and 25 °C (77 °F) , line-line
Nominal voltage24 V DC
Maximum continuous operating voltage30 V DC
Series resistance≤ 0.6 Ω per line
Impulse rating1 kV/0.5 kA (category C1)
10 kV/5 kA (category C2)
1 kA (category D1)
Impulse discharge current (10/350 µs)1 kA per line (2x)
Nominal discharge current (8/20 µs)5 kA per line (10x)
Rated surge current (8/20 µs)10 kA per line (1x)
Total discharge current (8/20 µs)20 kA (1x)
Voltage protection levelmax. 45 V line-line for nominal discharge current In
max. 1400 V line-earth for nominal discharge current In
Impulse reset time< 500 ms
Insertion loss≤ 0.03 dB, at 0 ... 4 kHz, in 600 Ω-System
≤ 3 dB, at 0 ... 600 kHz, in 100 Ω-System
Degree of protectionIEC 60529:2013
Functional safetyIEC/EN 61508:2010
Surge protective devices for low voltageEN 61643-21:2001+A1:2009+A2:2013
IEC 61643-21:2001+A1:2008+A2:2012
Ambient conditions
Ambient temperature-40 ... 80 °C (-40 ... 176 °F)
Observe the temperature range limited by derating, see section derating.
Storage temperature-40 ... 85 °C (-40 ... 185 °F)
Relative humiditymax. 95 % , without condensation
Mechanical specifications
Degree of protectionIP20
Massapprox. 20 g
Dimensions6.2 x 77 x 79 mm
Mountingpluggable in base module for mounting on 35 mm DIN mounting rail
Data for application in connection with hazardous areas
EU-type examination certificateBVS 17 ATEX E 069 X
MarkingEx-Hexagon II 2(1)G Ex ia [ia Ga] IIC T6...T4 Gb
Ex-Hexagon II (1)D [Ex ia Da] IIIC
Ex-Hexagon I (M1) [Ex ia Ma] I
Temperature classT6 for ambient temperature ≤ 60 °C
T5 for ambient temperature ≤ 70 °C
T4 for ambient temperature ≤ 80 °C
Voltage30 V
Current500 mA , restrictions see derating characteristics
Internal capacitancenegligible
Internal inductance36 µH
Directive conformity
Directive 2014/34/EUEN 60079-0:2012+A11:2013 , EN 60079-11:2012
International approvals
IECEx approval
IECEx certificateIECEx BVS 17.0061X
IECEx markingEx ia [ia Ga] IIC T6...T4 Gb
[Ex ia Da] IIIC
[Ex ia Ma] I
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see
Designationsystem components:
- base module with screw terminals M-LB-Ex-5000
- base module with spring terminals M-LB-Ex-5000.SP
- place holder module M-LB-Ex-5900
- separation wall M-UPR-I

Documents: M-LB-Ex-5142

ManualsLanguageFile TypeFile Size
Functional Safety ManualENGPDF554 KB
ManualENGPDF4174 KB
HandbuchGERPDF4186 KB
Handbuch Funktionale SicherheitGERPDF563 KB
Instruction manuals
ИнструкцииBULPDF133 KB
Návod k poużitíCZEPDF127 KB
Instruktions manualDANPDF126 KB
Instruction manualENGPDF133 KB
KasutusjuhendESTPDF122 KB
KäyttöohjeFINPDF122 KB
Manuel d'instructionsFRAPDF129 KB
BetriebsanleitungGERPDF134 KB
Οδηγίες χρήσηςGREPDF136 KB
HandleidingHOLPDF126 KB
Instruction manual / BetriebsanleitungHRVPDF125 KB
Használati útmutatóHUNPDF128 KB
Manuale di istruzioniITAPDF126 KB
Lietošanas pamācībaLAVPDF125 KB
Instrukciju vadovasLITPDF126 KB
Instrukcja obsługiPOLPDF129 KB
Manual de instruçõesPORPDF127 KB
Manual de utilizareRONPDF126 KB
Návod na poużitieSLKPDF127 KB
Navodila za uporaboSLVPDF124 KB
Manual de instruccionesSPAPDF126 KB
ManualSWEPDF124 KB

Approvals+Certificates: M-LB-Ex-5142

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of Conformity / EU-KonformitätserklärungDOC-3762PDF87 KB
BVS Ex ec Ex ia IECEx Certificate of ConformityIECEx BVS 17.0061XLINK---
EAC Lenpromexpertiza (LPE) EAC TP TC 012/2011EAEC RU C-DE.AA71.B.00023/19PDF1206 KB
Europe BVSBVS 17 ATEX E 069 XPDF2319 KB
India PESO (India) CCOEA/P/HQ/KA/104/5687 (P442479)PDF408 KB
Worldwide TUVNo. 968/FSP 1583.00/18PDF700 KB
Worldwide ÖVE (Austria) Certificate General PurposeAT 4120PDF202 KB

Associated Products: M-LB-Ex-5142

Matching system components
Base for protection module, Easy replacement of modules without tools, Connection via screw terminals, DIN rail mountable, Up to SIL 3 acc. to IEC 61508pa
Base for protection module, Easy replacement of modules without tools, Connection via spring terminals with push-in connection technology, DIN rail mountable, Up to SIL 3 acc. to IEC 61508pa
For surge protection system M-LB-5000, Isolation acc. to IEC 60079-11, Color black, DIN rail mountablepa

Function: M-LB-Ex-5142

The protection module limits induced transients of different causes, e. g. lightning or switching operations. The limitation is achieved by diverting the current to earth and limiting the signal circuit voltage during the duration of the overvoltage pulse.

The device is HART transparent.

The device is inserted onto the base module and forms the surge protection barrier together with the base module.

The device can be replaced without tools by a locking lever.

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