LYXJ‑24
LYXJ-24 Modular Compact Surge Protective Device for Signal Lines
Installation Location
Installed at the input terminals of instrument control systems, DCS systems, PLC control systems, and analog/digital signal circuits.
Function Description
It is mainly used to protect sensitive electronic instruments, control systems and communication interfaces from lightning surges, switching overvoltages and induced overvoltages, supporting hot-swap maintenance.
Key Parameter
Nominal voltage Un: 24V DC; Max. continuous operating voltage Uc: 28V DC; Nominal discharge current In: 5kA; Max. discharge current Imax: 10kA; Signal transmission rate: ≤2Mbps.
Application
Suitable for industrial control, instrument systems, DCS/PLC systems, sensor signal loops and low-speed data communication lines.
| Parameter | Spec |
|---|---|
| IEC/EN Category | D1/C1/C2/C3 |
| Mode of Protection | Longitudinal, Transverse |
| Coarse Protection | 3 Terminal GDT |
| Voltages | 5, 12, 15, 24, 30, 48, 60, 110 V DC |
| Frequency Range | 30 MHz |
| Surge Discharge Ratings | Iimp: 1.2kA; In(8/20): 20kA; Inr: 5kA |
| Series Load Current | 1 A |
| Enclosure | DIN 43880 2/3 TE, DIN Rail Mount |
| Housing | Modular Design |
| Compliance | IEC/EN 61643-21; UL 497B 4th Edition |
The LYXJ-24 provides the same level of protection. The plug-in module/base design facilitates replacement of a failed module without the need to remove system wiring.
If the module is unplugged out of the base, the connection lines remain enabled.
Technical Data — IEC Electrical
| Parameter | Spec |
|---|---|
| Lines Protected | 2 (4 wires) |
| Nominal Operating Voltage (DC) Un | 5V / 12V / 15V / 24V / 30V / 48V / 60V / 110V |
| Max. Continuous Operating Voltage (DC) Uc | 6V / 15V / 18V / 28V / 33V / 52V / 64V / 170V |
| Rated Load Current at 25°C IL | 1 A |
| C2 Nominal Discharge Current (8/20μs) In | 10 kA |
| Max. Discharge Current (8/20μs) Imax | 20 kA |
| D1 Impulse Current (10/350μs) Iimp | 5 kA |
| Residual Voltage at 5 kA (8/20μs) Ures | 22V ~ 450V (depends on model) |
| Rated Spark Overvoltage (Line-Ground) | 7~10V ~ 184~264V |
| Response Time tA | < 1 ns |
| Thermal Protection | Yes |
| Insulation Resistance Riso | ≥ 6 kΩ ~ 170 kΩ |
| Serial Resistance per Path R | 1.6~2.0 Ω |
| Transverse Capacitance C | 50 pF |
| Cut-off Frequency fc | 30 MHz |
| Temperature Range | -40℃ ~ +80℃ |
| Degree of Protection | IP20 |
| Mounting | 35 mm DIN Rail |
