Analog Systems – Narrow Line
The Raycap RayDat Narrow Line analog signal protection series is a modular SPD family that provides maximum density within the panel with its ultra-compact body, only 6.2 mm wide. It protects analog signal lines of temperature, pressure, level, and position sensors; its internal structure also allows it to protect high-frequency signals up to 120 MHz. Hot swapping and quick-connect terminals offer uninterrupted maintenance and fast installation.
Analog signals are used in industrial facilities for detection and measurement in control systems. Temperature, pressure, level, and position sensors generate analog signals carrying continuous, precise information about measured physical parameters. These signal lines often span long distances, making them vulnerable to lightning-induced overvoltages.
The RayDat Narrow Line series is a family of ultra-narrow format SPDs developed for the protection of these lines. The most distinctive feature of the series is its 6.2 mm width — half the size of classic 12 mm modules. In marshalling panels with hundreds of measurement points, this translates directly into an advantage in terms of panel count and installation cost.
The devices feature a multi-stage hybrid protection structure: coarse protection is provided by a gas discharge tube (GDT), and fine protection by a diode block (SAD/TVS); a series resistor (1 Ω) between them ensures energy coordination. The response time is <1 ns.
The internal configuration of the products also allows for the protection of high-frequency signals: standard models support operating frequencies up to 120 MHz. The line-to-line capacitance is typically as low as 25 pF — preserving signal integrity.
Hot swapping capability is critical: when the protection module is removed from the base, the connection lines remain active. This means an end-of-life module can be replaced without stopping the system or disconnecting wiring. The green flag / red flag indicator on the front panel instantly shows the device status. Additionally, a monitoring unit (transmitter and receiver) is available for all product variants — fault information can be transmitted to a central monitoring system.
Quick-connect terminals shorten field installation time. Various shield-handling options are offered.
Product families:
- RayDat NSL-2 Series — Standard single pair protection. 5, 12, 24, 48 V DC. Up to 120 MHz.
- RayDat NSL-2 LF Series — Low frequency (LF) version. 5, 12, 24 V DC. 250 kHz – 1 MHz. Offers a lower protection level (Up) — for the most sensitive circuits.
- RayDat NSP-2 Series — High voltage version. 24 and 110 V DC. Up to 120 MHz.
- RayDat NSP-2 LF Series — Low frequency + high current option. 24 V and 24/0 V DC (12 A load current in the 24/0 model).
Products comply with IEC/EN 61643-21 and UL 497B 4th Edition standards. Classification: D1 / C1 / C2 / C3. 35 mm DIN rail mounted.
- Narrow form factor — only 6.2 mm width
- Very high surge current ratings (In 10 kA, total 20 kA)
- Various shield-handling options
- Hot swapping — connection lines remain active during module replacement
- Quick-connect terminals for fast wiring
- Protects high-frequency signals — up to 120 MHz
- Multi-stage hybrid protection: GDT (coarse) + diode block (fine)
- Response time: <1 ns
- Thermal protection
- Status indicator: green flag / red flag
- Monitoring unit available for all variants (transmitter + receiver)
- Low line capacitance — signal integrity preserved
- 35 mm DIN rail mounting (IEC/EN 60715)
- Protection class: IP 20 (embedded)
- Housing: grey thermoplastic, V-0 flame resistance
- Operating temperature: -40 °C … +80 °C
- Classification: D1 / C1 / C2 / C3
- Standards: IEC/EN 61643-21, UL 497B 4th Edition
RayDat NSL-2 Series (standard, 120 MHz)
| 5 | 12 | 24 | 48 | |
|---|---|---|---|---|
| Nominal operating voltage Un | 5 V | 12 V | 24 V | 48 V |
| Max. continuous operating voltage Uc | 8.5 V | 15 V | 30 V | 54 V |
| Nominal load current IL (40 °C / 70 °C) | 800 mA / 600 mA | |||
| In (8/20 µs) line-to-line / line-to-ground | 10 kA / 10 kA | |||
| Total In (8/20 µs) | 20 kA | |||
| C2 protection level Up (line-to-line) | 140 V | 150 V | 170 V | 210 V |
| C2 protection level Up (line-to-ground) | 260 V | 270 V | 290 V | 300 V |
| C3 protection level Up (line-to-line) | 24 V | 36 V | 70 V | 130 V |
| Iimp (10/350 µs) line-to-line / line-to-ground | 2.5 kA / 2.5 kA | |||
| Total Iimp (10/350 µs) | 5 kA | |||
| Insulation resistance Riso | > 170 kΩ | > 7.5 MΩ | > 15 MΩ | > 27 MΩ |
| Capacitance (line-to-line / line-to-ground) | typ. 25 pF / 20 pF | |||
| Max. frequency fG | 120 MHz | |||
| Order code | 7088.26 | 7088.28 | 7088.01 | 7088.30 |
| Replacement module | 7088.27 | 7088.29 | 7088.02 | 7088.31 |
RayDat NSL-2 LF Series (low frequency, lower Up)
| 5 | 12 | 24 | |
|---|---|---|---|
| Nominal operating voltage Un | 5 V | 12 V | 24 V |
| Max. continuous operating voltage Uc | 8.5 V | 15 V | 30 V |
| Nominal load current IL (40 °C / 70 °C) | 800 mA / 600 mA | ||
| In (8/20 µs) line-to-line / line-to-ground | 10 kA / 10 kA | ||
| C2 protection level Up (line-to-line) | 80 V | 100 V | 160 V |
| C2 protection level Up (line-to-ground) | 100 V | 110 V | 140 V |
| C3 protection level Up (line-to-line) | 48 V | 60 V | 120 V |
| Iimp (10/350 µs) | 2.5 kA (total 5 kA) | ||
| Capacitance (line-to-line / line-to-ground) | typ. 5 nF / 10 nF | 3 nF / 6 nF | 1.5 nF / 3 nF |
| Max. frequency fG | 250 kHz | 500 kHz | 1 MHz |
| Order code | 7088.32 | 7088.34 | 7088.36 |
RayDat NSP-2 Series (high voltage, 120 MHz)
| 24 | 110* | |
|---|---|---|
| Nominal operating voltage Un | 24 V | 110 V |
| Max. continuous operating voltage Uc | 30 V | 170 V |
| Nominal load current IL (40 °C / 70 °C) | 800 mA / 600 mA | 800 mA / 600 mA |
| In (8/20 µs) line-to-line / line-to-ground | 10 kA / 10 kA | 10 kA / 10 kA |
| C2 protection level Up (line-to-line) | 180 V | 400 V |
| C2 protection level Up (line-to-ground) | 950 V | 980 V |
| Insulation resistance Riso | >15 MΩ | >85 MΩ |
| Capacitance (line-to-line / line-to-ground) | typ. 25 pF / 15 pF | typ. 25 pF / 15 pF |
| Max. frequency fG | 120 MHz | 120 MHz |
| Order code | 7088.05 | 7088.07 |
*110 V model has no UL certification
RayDat NSP-2 LF Series (low frequency + high current)
| 24 | 24/0 | |
|---|---|---|
| Nominal operating voltage Un | 24 V | 24 V |
| Max. continuous operating voltage Uc | 30 V | 30 V |
| Nominal load current IL (40 °C / 70 °C) | 800 mA / 600 mA | 12 A / 10 A |
| In (8/20 µs) line-to-line | 10 kA | 250 A |
| C2 protection level Up (line-to-line / line-to-ground) | 140 V / 950 V | — / 950 V |
| C3 protection level Up (line-to-line) | 60 V | 60 V |
| Series resistance R per path | 1 Ω | 0.1 Ω |
| Capacitance (line-to-line) | typ. 1 nF | typ. 1 nF |
| Max. frequency fG | 1.5 MHz | 1.5 MHz |
The RayDat Narrow Line analog series is used for the protection of sensor and measurement lines:
- Temperature, pressure, level, and position sensors — Signal lines of field measurement devices
- 4-20 mA current loop lines — Between field and control system
- PLC / DCS analog input-output cards — Control system side
- Marshalling and instrumentation panels — Panels with hundreds of signal points
- Panels with critical space constraints — Maximum density with 6.2 mm width
- High-frequency signal lines — Up to 120 MHz (NSL-2 / NSP-2)
- Sensitive low-frequency circuits — Lines requiring low protection level (LF series)
- 110 V DC systems — High voltage circuits with NSP-2-110
- High current supply lines — Up to 12 A (NSP-2-24/0 LF)
- Shielded signal cables — With various shield-handling options
- Facilities requiring continuous operation — Maintenance without production stoppage via hot swapping
- Remotely monitored facilities — SCADA integration with monitoring unit (transmitter/receiver)
- Projects requiring fast commissioning — Short installation time with quick-connect terminals
- Harsh industrial environments — -40 °C … +80 °C operating range
