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The Surge Protection Barrier is designed to provide robust protection for two non-grounded signal lines operating at a nominal voltage of 24 V DC. With a maximum surge current capacity of 20 kA, it ensures reliable operation in demanding environments.
The Surge Protection Barrier from Pepperl+Fuchs is engineered to safeguard sensitive electronic equipment against voltage surges and transients, particularly in industrial applications where signal integrity is critical. This device is essential for protecting equipment connected to non-grounded signal lines, making it suitable for various sectors, including manufacturing, transportation, and process automation.
With a surge current handling capability of up to 20 kA (8/20 µs), the barrier effectively mitigates the risks associated with electrical surges caused by lightning strikes, switching operations, or other transient events. The product is designed to be mounted on DIN rails, facilitating easy installation in control cabinets and distribution panels. Additionally, it meets safety standards up to SIL 3 in accordance with IEC 61508, ensuring compliance with stringent operational safety requirements.
| Degree of protection | IP20 , after mounting of the insulation spacer |
| Electromagnetic compatibility | EN 61326-3-1:2017 |
| Nominal voltage | 24 V DC |
| Series resistance | ≤ 3 Ω per line |
| Insertion loss | ≤ 3 dB at 0 … 900 kHz in 100 Ω system |
| Designation | – insulation spacer M-LB-2800 – terminal block USLKG5 |
| Voltage protection level | max. 45 V line-line for nominal discharge current In max. 1400 V line-earth for nominal discharge current In |
| Safety Integrity Level (SIL) | SIL 3 |
| Degree of protection | IEC 60529:2013 |
| Impulse discharge current (10/350 µs) | 1 kA per line (2x) |
| Total discharge current (8/20 µs) | 20 kA (1x) , overstressed fault mode 3 acc. to IEC 61643-21 |
| Mounting | on 35 mm DIN mounting rail acc. to EN 60715:2001 |
| Impulse reset time | < 500 ms |
| Ambient temperature | -40 … 80 °C (-40 … 176 °F) Observe the temperature range limited by derating, see section derating. |
| Topology | non-grounded |
| Connection | screw terminals , max. core cross section 1 x 2.5 mm2 |
| Nominal discharge current (8/20 µs) | 5 kA per line (10x) |
| Leakage current | < 3 µA at 24 V and 25 °C (77 °F) , line-line |
| Rated current | 500 mA , restrictions see derating characteristics |
| Surge protective devices for low voltage | IEC 61643-21:2000+A1:2008+A2:2012 |
| Maximum continuous operating voltage | 30 V DC |
| Mass | approx. 32 g |
| Connection | protected area: terminals 4, 5 unprotected area: terminals 2, 3 shielding/grounding: terminal 1 (optional) |
| Impulse rating | 1 kV/0.5 kA (category C1) 10 kV/5 kA (category C2) 1 kA (category D1) |
| Material | Polyamide (PA) |
| Supplementary information | Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com. |
| Relative humidity | max. 95 % , without condensation |
| Dimensions | 6.2 x 72.4 x 93 mm |
| Number of protected signal lines | 2 |
| Certificate | KIWA 19 ATEX 0002 X |
| Functional safety | IEC/EN 61508:2010 |
| Storage temperature | -40 … 85 °C (-40 … 185 °F) |
Currently, the goods have no revocation.
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