Pepperl+Fuchs‘ surge protection modules reliably divert surges and currents to ground and protect people and machines against possible negative consequences. Our product range provides you with powerful surge protection solutions for various applications. Find devices for signal line protection, supply line protection, fieldbus, and wireless solutions.

Surge Protection Barrier M-LB-2144

Function

The device 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 loop voltage during the duration of the overvoltage pulse.
The device is HART transparent.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.

Technical Data

General specifications

• Number of protected signal lines: 2

• Topology: grounded

Functional safety related parameters

• Safety Integrity Level (SIL): SIL 3

Electrical specifications

• Connection:

  • protected area: terminals 4, 5

  • unprotected area: terminals 2, 3

  • shielding/grounding: terminal 1 (optional)

• Rated current (Iₙ):

  • 500 mA, restrictions see derating tables

  • UL: 400 mA, restrictions see derating tables

• Leakage current:

  • < 6 µA at 24 V and 25 °C (77 °F), line-line

• Nominal voltage (Uₙ):

  • 24 V DC

• Maximum continuous operating voltage (U_c): 30 V DC

• Series resistance: ≤ 3 Ω per line

• Impulse rating:

  • 1 kV/0.5 kA (category C1)

  • 10 kV/5 kA (category C2)

  • 1 kA (category D1)

• Impulse discharge current (10/350 µs, I_imp): 1 kA per line (2x)

• Nominal discharge current (8/20 µs, I_n): 5 kA per line (10x)

• Total discharge current (8/20 µs, I_total): 20 kA (1x), overstressed fault mode 3 acc. to IEC 61643-21

• Voltage protection level (U_p):

  • max. 45 V line-line for nominal discharge current I_n

  • max. 60 V line-earth for nominal discharge current I_n

• Impulse test time: < 500 ms

• Insertion loss: ≤ 3 dB at 0…700 kHz in 100 Ω system

Conformity

• Electromagnetic compatibility: EN 61326-3-1:2017

• Degree of protection: IEC 60529:2013

• Functional safety: IEC/EN 61508:2010

• Surge protective devices for low voltage: IEC 61643-21:2000+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 humidity: max. 95 % , without condensation

• Corrosion resistance: acc. to ISA-71.04, severity level G3

Mechanical Specifications

• Degree of protection: IP20, after mounting of the insulation spacer

• Connection: screw terminals , max. core cross section 1 x 2.5 mm²

• Material: Polyamide (PA)

• Mass: sekitar 32 g

• Dimensions: 6.2 x 93 x 72.4 mm (0.24 x 3.7 x 2.8 inch) (W x H x D)

• Mounting: on 35 mm DIN mounting rail acc. to EN 60715:2001

Data for Application in Connection with Hazardous Areas

• Certificate: KIWA 19 ATEX 0002 X

• Marking:
  ![ATEX symbol] II 3G Ex ec IIC T6…T4 Gc

• Temperature class: T6, T5, or T4, restrictions see derating tables

• Directive conformity:

  • Directive 2014/34/EU

  • EN IEC 60079-0:2018+AC:2020

  • EN 60079-7:2015+A1:2018

International Approvals

• UL Approval:

  • E501704

  • E501881

• Breakdown voltage (U_BR):

  • 30…45 V line-line at 100 V/µs acc. to UL 497B

  • 30…45 V line-earth at 100 V/µs acc. to UL 497B

  • < 1000 V at 100 V/µs acc. to UL 497B

• IECEx Approval:

  • Certificate: IECEx KIWA 19.0002X

  • Marking: Ex ec IIC T6…T4 Gc

General Information

• Supplementary information:
  Observe the certificates, declarations of conformity, instruction manuals, and manuals
  where applicable. For information see www.pepperl-fuchs.com.