SPD Status Monitoring Terminal

1. High-precision Multi-parameter Collection: Supports 3-channel leakage current collection (range 100uA~150mA, accuracy ±10%), 1-channel NTC temperature collection (-30~160℃), and built-in temperature-humidity collection (temperature -20~60℃, humidity 0~100%RH). It fully captures SPD operation status and provides accurate data support for fault early warning.

2. Reliable Lightning Strike Monitoring & Recording: Equipped with 1-channel lightning surge collection, with trigger current 0.5kA~100kA and support for T1/T2/T3 surge types. It can record the latest 9999 lightning strike dates and times, and data is not lost after power failure, facilitating traceability of lightning risks.

3. Strong Anti-interference & Flexible Communication: The serial port is equipped with a surge protection circuit, the collection port adopts photoelectric isolation, and the MCU has enhanced shielding. It comes with standard RS485 (MODBUS RTU protocol, address adjustable 1~128) and supports Ethernet, Lora, 4G expansion, adapting to data transmission needs in different scenarios.

4. Intelligent Life Assessment & Alarm: Based on leakage current changes and trends, it calculates the remaining life of 3-channel SPD in real time via algorithms (green/orange/red indicators for normal/early warning/alarm). When Y2 remote signal is triggered, it links to alarm and requires manual intervention for recovery, avoiding missed judgment risks.

5. Convenient Installation & Data Preservation: Adopts standard 35mm DIN rail installation with plug-in terminals; alarm data is permanently saved after power failure, and clock data is retained for more than 6 months after power failure, reducing maintenance costs and data loss risks.

Model TDZ-SZJ

Power Supply: 12VDC input, with reverse connection protection
Device Power Consumption: 1W
Communication Interface: RS485 (MODBUS RTU protocol), default baud rate 9600 (adjustable), parity N, data bit 8, stop bit 1; address adjustable 1~128 (default 1)
Collection Function Leakage current: 3 channels, 100uA~150mA (accuracy ±10%); NTC temperature: 1 channel, -30~160℃ (supports high/low temperature alarm); Switch quantity: 2 channels (photoelectric isolation, passive dry contact); Lightning surge: 1 channel (trigger current 0.5kA~100kA, records 9999 times); Temperature-humidity: built-in, temperature -20~60℃, humidity 0~100%RH; PE wire detection: 1 channel (identifies non-grounding/false grounding)
SPD Remaining Life Calculated via leakage current algorithm, local indicators (green/orange/red) and remote data reading, corresponding to remaining life 31%~100%/1%~30%/0%
Data Preservation Alarm data: permanently saved after power failure; Clock data: retained ≥6 months after power failure
Shell Material: PC+ABS (gray, color customizable for orders ≥500pcs), flame retardant grade V0
Installation Method: Standard 35mm DIN rail
Operating Environment Temperature: -25~70℃, humidity 0~95%RH (no condensation)
Firmware Upgrade Remote upgrade via serial port; supports remote upgrade in transparent transmission mode when expanding Ethernet/Lora/4G modules

1. Railway/Rail Transit Systems: Installed in signal cabinets and distribution boxes along the line, it monitors SPD status in real time to avoid signal interruption caused by lightning strikes, solving the problems of long manual inspection cycles and large blind spots, and ensuring transportation safety.

2. Wind Farm Equipment: Used in wind turbine distribution boxes and control room lightning protection cabinets, it remotely collects leakage current, temperature and humidity data, and timely detects SPD failure, reducing maintenance costs caused by lightning damage to wind turbine control systems.

3. Expressway Electromechanical Facilities: Deployed in toll stations and monitoring center distribution cabinets, it monitors SPD lightning strike count and protection switch status, and links with power environment systems to realize centralized monitoring, avoiding the impact of thunderstorm weather on toll collection and monitoring functions.

4. Civil Aviation Airport Facilities: Applied in terminal communication cabinets and navigation equipment lightning protection boxes, it accurately monitors PE wire connection status and SPD temperature, preventing lightning electromagnetic pulses from damaging communication and navigation equipment, and ensuring normal flight operations.

Frequent Questions

1. Which installation scenarios does the device support?

Supports indoor standard 35mm DIN rail installation, integrable into lightning protection boxes, distribution boxes, and network cabinets without changing the original layout.
2. How to clear lightning strike count data?

After lighting up the display, switch to the lightning strike count screen, long-press the button for 5 seconds, display "C-PL" for clearing, and "oh" indicates success.
3. Will reverse power connection damage the device?

No, the device has 12VDC reverse connection protection to avoid hardware damage caused by reverse connection of positive and negative poles.
4. Which devices are required for remote monitoring?

It can be matched with power environment RTU (front-end collection) or monitoring software (back-end), and upload data via RS485 or expanded communication.

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