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Signal surge protector
DB25 Parallel Port RS232 Surge Protector
Product Features
● Comprehensive Pin Protection: Protects all 25 signal lines and the outer metal D-shell chassis to ensure complete transient suppression across the entire interface.
● Ultra-Fast Response Time: Features balanced arrays of high-speed silicon avalanche diodes (SAD) or metal oxide varistors (MOV) with sub-nanosecond response times (<1ns) to clamp dangerous spikes instantly.
● Minimal Insertion Loss: Engineered to maintain signal integrity, supporting high baud rates (up to 921.6 kbps) with negligible signal attenuation.
● Flexible In-line Installation: Easy "plug-and-play" direct connection between the cable and the equipment port. Reversible male-to-female configuration simplifies deployment.
● Industrial-Grade Grounding: Equipped with a dedicated low-impedance external grounding wire or metal chassis ground to safely divert excess energy directly to earth ground.
Scope of Application
The ProLPS DB25 inline surge protective device is highly recommended for harsh industrial environments, telecommunications, and legacy systems integration:
Industrial Automation: Protecting PLC interfaces, CNC machines, motor drives, and industrial SCADA controllers utilizing serial RS232 networks.
Commercial Systems: Securing point-of-sale (POS) systems, barcode printers, modems, and data terminal equipment (DTE).
Legacy IT Infrastructure: Safeguarding PC legacy parallel printer ports, switches, and mainframe communication interfaces from ground loop transients.
Why Choose ProLPS DB25 Surge Suppressors?
Unlike generic data-line protectors that only shield standard Tx/Rx lines, the ProLPS DB25 Series offers specialized full-pin protection. By shunting harmful surge energy before it enters your hardware, our serial port protectors eliminate system lockups, garbled data transmissions, and permanent hardware failure. Protect your critical connectivity investment with ProLPS's proven lightning and overvoltage technology.
Technical Specifications
|
Item |
TD9-11/25-24/M |
TD9-11/25-24/F |
|
MODEL |
TD9-11/25-24/M |
TD9-11/25-24/F |
|
Electrical Parameters |
|
|
|
Rated Operating Voltage Un |
24VDC |
24VDC |
|
Max Continuous Operating Voltage Uc |
28VDC |
28VDC |
|
C2 Nominal Discharge Current(8/20μs) In |
5kA |
5kA |
|
C2 Maximum Discharge Current(8/20μs) Imax |
10kA |
10kA |
|
D1 Discharge Current(10/350μs) |
1kA |
1kA |
|
C3 Voltage Protection Level Up |
≤ 55V |
≤ 55V |
|
Operating Load Current IL |
180mA |
180mA |
|
Common Parameters |
|
|
|
Insertion Loss |
≤0.5dB |
≤0.5dB |
|
Respond Time |
<1ns |
<1ns |
|
Interface Protection Mode |
DB25 M-enter, F-out |
DB25 M-enter, F-out |
|
Cut-off Frequency |
1MHz |
1MHz |
|
Operating Temperature Range |
-40℃~70℃ |
-40℃~70℃ |
|
Operating Relative Humidity(indoor Temp) |
≤95% |
≤95% |
|
Installation Mode |
A: without rail |
B:with 35mm rail |
Basic Circuit Diagram
Dimensions
Certificate
Document Download
Quality Inspection(Test reference)
1 Inspection Reference
IEC61643.11 Surge Protective Devices (SPD) for Low-Voltage Distribution Systems
Part 1: Performance Requirements and Test Methods
GB/T 2828.1-2012 Sampling Inspection Procedures
Part 1: Sampling Plans for Inspection by Acceptance Quality Limit (AQL)
2 Incoming Inspection
Incoming material inspection is conducted based on the "Metal Parts Inspection Standard," "Plastic Parts Inspection Standard," "Electronic Parts Inspection Standard," "Auxiliary Materials Inspection Standard," and the GB/T 2828.1-2012 Sampling Inspection Procedure.
3 Finished Products Inspection
1) Routine test
Routine inspection is a 100% inspection conducted at the final stage of production on products from the production line. After inspection, no further processing is done, except for packaging and labeling.
2) Sampling test
Sampling inspection is performed according to the GB/T 2828.1 sampling standard.
3) Acceptance test
Verification inspection is a sampling inspection conducted to ensure that the product continues to meet the standard requirements. Verification inspection should be carried out according to the procedures and frequency specified by the standard.
Inspection Table
|
Inspection Items |
Routine test |
Sampling test |
Acceptance test |
|
Packaging |
|
√ |
|
|
Appearance Quality |
√ |
√ |
√ |
|
Structure and Shape |
√ |
||
|
Remote Signal Alarm Function |
√ |
√ |
√ |
|
U1mA Value Test |
√ |
√ |
|
|
Markings and Labels |
√ |
√ |
√ |
|
Direct Contact Protection Test |
√ |
||
|
Standby Power Consumption and Residual Current |
√ |
||
|
Protection Level |
√ |
||
|
Action Load Test |
√ |
||
|
Thermal Stability Test |
√ |
√ |
|
|
Temporary Overvoltage (TOV) Test |
√ |
||
|
Mechanical Strength |
√ |
||
|
Insulation Resistance |
√ |
||
|
Dielectric Strength |
√ |
||
|
Environment, IP Code |
√ |
||
|
Electrical Clearance and Creepage Distance |
√ |
||
|
Resistance to Abnormal Heat and Flammability |
√ |
||
|
Status Indicator Operation |
√ |
√ |
√ |
|
Isolation Between Separate Circuits |
√ |
||
|
Transportation Vibration Test |
√ |
||
|
Free Fall Test |
√ |
||
|
Insertion and Withdrawal Force Test Before Surge Impulse (for Pluggable Modules) |
√ |
√ |
