DC Power Systems – Narrow Line
The Raycap RayDat Narrow Line DC power series (NPS-2) protects DC supply lines in protocols requiring combined power and signal line protection, such as CAN bus and DeviceNet. With its ultra-compact 6.2 mm width, it provides maximum density within the panel; it carries up to 12 A load current, can be used in AC and DC systems, and offers uninterrupted maintenance with hot-swapping support.
In some industrial communication protocols, power and signal are carried within the same cable. CAN bus and DeviceNet are typical examples: the same cable contains both data lines and a DC power line that supplies the devices. In this architecture, protecting the signal line alone is not enough — a surge from the power supply line will also shut down the entire segment.
The RayDat Narrow Line DC series (NPS-2) was developed specifically for the protection of these power lines. By using it side-by-side on the same rail with analog and digital Narrow Line modules, both the signal and power sides of a CAN/DeviceNet segment are fully protected.
The most distinctive feature of the series is its 6.2 mm width — less than half the width of classic modules. In automation panels with numerous nodes, this is a direct advantage reflected in the number of panels.
The device carries a 12 A load current (at 40 °C) — one of the highest values in the Narrow Line family. The series resistance per path is only 0.1 Ω, meaning it does not create a significant voltage drop in the supply line. It can be used in both AC and DC systems (Uc 38 V AC/DC).
The protection structure is a MOV (varistor) + GDT (gas discharge tube) combination: MOV operates line-to-line, GDT operates line-to-ground. The protection level is 250 V line-to-line and 650 V line-to-ground. The response time is < 25 ns. Thermal protection is included.
Hot-swapping capability is critical: when the protection module is removed from the base, the connection lines remain active — module replacement does not stop the bus segment. The green flag / red flag indicator on the front panel instantly shows the status. Additionally, a monitoring unit (transmitter and receiver) is available for all product variants.
Quick-connect terminals shorten field installation time. The product complies with IEC/EN 61643-21 and UL 497B 4th Edition standards. Classification: C1 / C2 / C3.
- Narrow form factor — only 6.2 mm width
- High surge withstand values
- Suitable for AC and DC power systems
- Hot-swapping — connection lines remain active during module replacement
- Quick-connect terminals
- Up to 12 A load current (40 °C) / 10 A (70 °C)
- For protocols requiring power + signal protection — CAN bus, DeviceNet
- Protection structure: MOV (line-to-line) + GDT (line-to-ground)
- Very low series resistance: 0.1 Ω
- Response time: < 25 ns
- Thermal protection
- Status indicator: green flag / red flag
- Monitoring unit available for all variants (transmitter + receiver)
- 35 mm DIN rail mounting (IEC/EN 60715)
- Protection class: IP 20 (embedded)
- Housing: gray thermoplastic, V-0 flame resistance
- Operating temperature: -40 °C … +80 °C
- Classification: C1 / C2 / C3
- Standards: IEC/EN 61643-21, UL 497B 4th Edition
RayDat NPS-2 Series — Electrical Values
| NPS-2-24 | |
|---|---|
| Protected line | 1 pair (2 conductors) |
| Nominal operating voltage (DC) Un | 24 V |
| Max. continuous operating voltage (DC) Uc | 38 V |
| Max. continuous operating voltage (AC) Uc | 38 V |
| Nominal load current IL (40 °C) | 12 A |
| Nominal load current IL (70 °C) | 10 A |
| C2 In (8/20 µs) line-to-line | 4 kV / 2 kA |
| C2 In (8/20 µs) line-to-ground | 4 kV / 2 kA |
| C2 total In (8/20 µs) | 8 kV / 4 kA |
| C2 protection level Up (line-to-line) | 250 V |
| C2 protection level Up (line-to-ground) | 650 V |
| C3 protection level Up (line-to-line) | 200 V |
| C3 protection level Up (line-to-ground) | 700 V |
| Nominal sparkover voltage (line-to-line) | 84 – 106 V |
| Nominal sparkover voltage (line-to-ground) | 72 – 160 V |
| Response time tA | < 25 ns |
| Thermal protection | Yes |
| Insulation resistance (line-to-line) Riso | > 10 MΩ |
| Series resistance per path R | 0.1 Ω |
| Capacitance (line-to-line / line-to-ground) | typ. 5 nF / 10 pF |
| Max. frequency fG | 550 kHz (up to 800 kHz) |
Mechanical
- Dimensions: 6.2 mm width (DIN 43880) — Weight: 58 g (module: 16 g)
- Conductor cross-section (max.): 4 mm² (solid) / 2.5 mm² (flexible)
- Mounting: 35 mm DIN rail (IEC/EN 60715)
- Packaging: 113 × 111 × 11 mm — Min. package quantity: 15
RayDat Narrow Line DC power series is used in supply lines of systems where power and signal are carried together:
- CAN bus networks — Segments carrying power + signal in the same cable
- DeviceNet networks — Industrial device-level communication
- 24 V DC supply lines — Sensor, actuator, and field device power supplies
- Automation panels — Facilities with numerous nodes
- Space-critical panels — Maximum density with 6.2 mm width
- High-current supply lines — Up to 12 A load current
- AC and DC mixed systems — Up to 38 V AC/DC
- PLC and controller supply outputs — Control system side
- Field device power distribution — Marshalling panels
- With Narrow Line analog/digital modules — Complete segment protection on the same rail
- Facilities requiring continuous operation — Maintenance without bus interruption 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
