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The Surge Protection Barrier is designed for effective protection of 2 signal lines at a nominal voltage of 24 V DC. This barrier ensures the safety of non-grounded signal lines by managing surge currents up to 20 kA.
The Surge Protection Barrier is an essential component in industrial environments where signal integrity is critical. It provides surge protection for non-grounded signal lines, making it ideal for applications in process automation, control systems, and other sensitive electronic equipment. By limiting the impact of voltage surges, this barrier helps to prevent damage to instrumentation and ensures reliable operation.
With a maximum surge current capability of 20 kA for 8/20 µs waveforms, this product is suitable for installations subject to transient overvoltage conditions. The device is easily mounted on a DIN rail and features screw terminals for straightforward wiring. Additionally, it meets stringent safety standards, achieving up to SIL 3 compliance according to IEC 61508, ensuring its reliability in safety-critical applications.
| Dimensions | 6.2 x 72.4 x 93 mm |
| Connection | screw terminals , max. core cross section 1 x 2.5 mm2 |
| Surge protective devices for low voltage | IEC 61643-21:2000+A1:2008+A2:2012 |
| Degree of protection | IEC 60529:2013 |
| Maximum continuous operating voltage | 30 V DC |
| Rated current | 500 mA , restrictions see derating characteristics |
| Designation | – insulation spacer M-LB-2800 – terminal block USLKG5 |
| Leakage current | < 3 µA at 24 V and 25 °C (77 °F) , line-line |
| Connection | protected area: terminals 4, 5 unprotected area: terminals 2, 3 shielding/grounding: terminal 1 (optional) |
| Series resistance | ≤ 3 Ω per line |
| Mass | approx. 32 g |
| Voltage protection level | max. 45 V line-line for nominal discharge current In max. 1400 V line-earth for nominal discharge current In |
| Relative humidity | max. 95 % , without condensation |
| EU-type examination certificate | KIWA 19 ATEX 0003 X |
| 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 |
| Electromagnetic compatibility | EN 61326-3-1:2017 |
| Degree of protection | IP20 , after mounting of the insulation spacer |
| Functional safety | IEC/EN 61508:2010 |
| Storage temperature | -40 … 85 °C (-40 … 185 °F) |
| Material | Polyamide (PA) |
| Nominal voltage | 24 V DC |
| Mounting | on 35 mm DIN mounting rail acc. to EN 60715:2001 |
| Supplementary information | Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com. |
| Impulse rating | 1 kV/0.5 kA (category C1) 10 kV/5 kA (category C2) 1 kA (category D1) |
| Ambient temperature | -40 … 80 °C (-40 … 176 °F) Observe the temperature range limited by derating, see section derating. |
| Safety Integrity Level (SIL) | SIL 3 |
| Topology | non-grounded |
| Insertion loss | ≤ 3 dB at 0 … 900 kHz in 100 Ω system |
| Impulse reset time | < 500 ms |
| Number of protected signal lines | 2 |
| Nominal discharge current (8/20 µs) | 5 kA per line (10x) |
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