By LEIDITECH | 14 March 2024 | 0 Comments
Analysis of hardware interface damage in wireless monitoring and telemetry terminals
The hardware product images of wireless monitoring and telemetry terminals are as follows
one Wireless monitoring and telemetry terminal hardware interface
1. wireless communication interface：Interface for wireless communication with remote servers or other devices，asWi-Fi、Bluetooth、LORAWAN（Low power wide area network）、NB-IoT（Narrowband Internet of Things）etc.。
2. Wired communication interface：Interface for wired communication with other devices，Like Ethernet、RS-485、RS-232, etc。
3. Data storage interface：Interface for storing data，assdcardslot 、USBInterfaces, etc。
4. Sensor interface：Interface for connecting various sensors，Like analog input interface（Used to connect analog sensors）、Digital input interface（Used to connect switch type sensors）etc.。
5. Power interface：Interface for connecting power supply，asDCPower interface、Battery interface, etc
two Reason for interface damage
These interfaces are prone to damage during design and use，What is the reason for that？
Shanghai LeimaoEMCBased on years of experience, the young man analyzed as follows：
Lightning strike：The atmospheric electrostatic charges generated by lightning activities can enter terminal devices through interfaces，Causing equipment to be electrocuted，Causing serious damage。
Surge current：The surge current is caused by lightning strikes、Transient current surge in the power system caused by power grid faults or other reasons。These surge currents may enter wireless monitoring and telemetry terminals through power lines，Damage to the interface。
Unprotected plug and unplug：Frequent plugging and unplugging can cause wear on the metal contacts of the interface、Oxidation or deformation，Causing poor contact or issues with electrical signal transmission。
electrostatic discharge ：Improper implementation of anti-static measures，If not using anti-static wristbands or touching grounded objects，May cause electrostatic discharge，Damaging circuit components inside the interface。
three．Solution to interface damage
EMCLittle brother recommends considering electromagnetic compatibility，The following aspects need to be noted：
1. electromagnetic radiation：Avoid generating excessive electromagnetic radiation，Ensure that the product complies with relevant electromagnetic radiation standards within the specified frequency band。Using appropriate filters and shielding techniques，To reduce radiation interference。
2. electromagnetic induction：Avoid product interference from external electromagnetic fields，Using appropriate shielding materials and structures，To reduce inductive interference。
3. Ground wire interference：Ensure that the grounding wire design of the product is good，And it should be well connected to the ground wire of other devices，To reduce ground wire interference。
4. Power interference：Prevent power noise and interference from spreading into the product through the power cord。Using appropriate filtering circuits and voltage stabilizing power supplies，To reduce power interference。
5. Protection of input/output interfaces：For sensitive input/output interfaces，Using appropriate protective circuits（Like electromagnetic relays、Optocouplers, etc），To reduce the impact of external interference on it。
four. Interface protection scheme
Shanghai Leimao provides complete solutions for the above interfaces，Complete interface protection design scheme，as follows：
1. Power interface
The power supply may be usedDC 5V-36V,Only 12VFor reference
2. WIFIinterface
3. Ethernet （100Mbps and Gigabit）
4. RS485 interface
5. RS232 interface
6. USB interface
7. SIM Card interface
The above lists some interface scheme diagrams，If other interface requirements can be contacted Shanghai LeimaoEMCLittle brother
Communication interface and electromagnetic compatibility issues that need to be noted when designing and using wireless monitoring and telemetry terminal hardware products。Based on specific products and application scenarios，Further consideration of other relevant factors is needed to ensure the normal operation and reliability of the product。
NB-IoTEquipment antenna electrostatic surge protection scheme
Leiditech recommends near-field communicationNFCInterface anti-staticESD
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