Chengdu Ebyte Electronic Technology Co.,Ltd.
E90-DTU (433L33)-V8_User Manual_EN
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Chengdu Ebyte Electronic Technology Co.,Ltd
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10.
Precautions for Use
1.
Please take good care of the warranty card of the device. The warranty card contains the factory number (and important
technical parameters) of the device, which has important reference value for the user's future maintenance and new equipment.
2.
During the warranty period, if the DTU is damaged due to the quality of the product itself rather than man-made damage or
natural disasters such as lightning strikes, it enjoys free warranty; please do not repair by yourself, and contact our company if
there is a problem. Ebyte provides first-class After-sales service.
3.
Do not operate this DTU in the vicinity of some flammable places (such as coal mines) or explosive dangerous objects (such
as detonators for detonation).
4.
A suitable DC stabilized power supply should be selected, which requires strong anti-high frequency interference, small ripple,
and sufficient load capacity; preferably, it should also have over-current, over-voltage protection and lightning protection
functions to ensure that the DTU is normal jobs.
5.
Do not use it in a working environment that exceeds the environmental characteristics of the DTU, such as high temperature,
humidity, low temperature, strong electromagnetic field or dusty environment.
6.
Don't let the DTU continuously be in full load transmitting state, otherwise the transmitter may be burnt out.
7.
The ground wire of the DTU should be well connected with the ground wire of the external equipment (such as PC, PLC, etc.)
and the ground wire of the power supply, otherwise the communication interface will be burnt easily; do not plug or unplug the
serial port with power on.
8.
When testing a DTU, you must connect a matching antenna or a 50Ω dummy load, otherwise the transmitter will be easily
damaged; if the antenna is connected, the distance between the human body and the antenna should be more than 2 meters to
avoid injury. Touch the antenna when transmitting.
9.
Wireless data transmission stations often have different communication distances in different environments. The
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