Description
24VDC, 1-Pair Lightning & Surge Protection Device.
■ Space-saving terminal block with integrated surge protection
■ Disconnection module for disconnecting signal circuits for maintenance work
■ For installation in conformity with the lightning protection zone concept at the boundaries from 0B –2 and higher
Energy-coordinated two-stage arrester with disconnection function that has no leakage current to earth protects one unearthed pair as well as balanced interfaces.
| Type | DCO SD2 MD 24 |
| Part No. | 917 941 |
| SPD class | Q |
| Nominal voltage (UN) | 24 V |
| Max. continuous operating voltage (d.c.) (UC) | 33 V |
| Max. continuous operating voltage (a.c.) (UC) | 23 V |
| Nominal current at 80 °C (IL) | 0.5 A |
| D1 Lightning impulse current (10/350 μs) per line (Iimp) | 1 kA |
| C2 Total nominal discharge current (8/20 μs) (In) | 10 kA |
| C2 Nominal discharge current (8/20 μs) per line (In) | 5 kA |
| Voltage protection level line-line forIn C2 (UP) | ≤ 50 V |
| Voltage protection level line-PG forIn C2 (UP) | ≤ 750 V |
| Voltage protection level line-line at 1 kV/μs C3 (UP) | ≤ 45 V |
| Voltage protection level line-PG at 1 kV/μs C3 (UP) | ≤ 650 V |
| Series resistance per line | 1.8 ohms |
| Cut-off frequency line-PG (fG) | 6 MHz |
| Capacitance line-line (C) | ≤ 1.0 nF |
| Capacitance line-PG (C) | ≤ 6 pF |
| Operating temperature range (TU) | -40 °C … +80 °C |
| Degree of protection | IP 00 |
| For mounting on | 35 mm DIN rails acc. to EN 60715 |
| Connection (input / output) | spring / spring |
| Cross-sectional area (solid) | 0.34-2.5 mm2 |
| Cross-sectional area (flexible) | 0.34-2.5 mm2 |
| Earthing via | DIN rail / terminal |
| Enclosure material | polyamide PA 6.6 |
| Colour | yellow |
| Test standards | IEC 61643-21 / EN 61643-21 |
| SIL classification | up to SIL3*) |
| Approvals | UL, CSA, SIL, EAC |
| Extended technical data: | – – – – – – – – – – – – – – – – – – – |
| – Max. discharge current (8/20 μs) [1/2 – PG], [1+2 – PG] (Imax) | 20 kA |
| – Voltage protection level line-PG at 1 kV/μs C3 after being | |
| subjected to Imax (UP) | ≤ 650 V |
| Weight | 31 g |
| Customs tariff number (Comb. Nomenclature EU) | 85363010 |
| GTIN | 4013364150607 |
| PU | 1 pc(s) |
We reserve the right to introduce changes in performance, configuration and technology, dimensions, weights and materials in the course of technical progress. The figures are shown without obligation.
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