OG_LMD-400-R-AB_v11e Circuit Design, Inc.
19
OPERATION GUIDE
Important notice
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Customers are advised to consult with Circuit Design sales representatives before ordering.
Circuit Design believes the provided information is accurate and reliable. However, Circuit Design reserves the
right to make changes to this product without notice.
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Circuit Design products are neither designed nor intended for use in life support applications where malfunction
can reasonably be expected to result in significant personal injury to the user. Any use of Circuit Design products
in such safety-critical applications is understood to be fully at the risk of the customer and the customer must
fully indemnify Circuit Design, Inc for any damages resulting from any improper use.
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As the radio module communicates using electronic radio waves, there are cases where transmission will be
temporarily cut off due to the surrounding environment and method of usage. The manufacturer is exempt from
all responsibility relating to resulting harm to personnel or equipment and other secondary damage.
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The manufacturer is exempt from all responsibility relating to secondary damage resulting from the operation,
performance and reliability of equipment connected to the radio module.
Copyright
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All rights in this operation guide are owned by Circuit Design, Inc. No part of this document may be copied or
distributed in part or in whole without the prior written consent of Circuit Design, Inc.
Cautions
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As the radio module communicates using electronic radio waves, there are cases where transmission will be
temporarily cut off due to the surrounding environment and method of usage. The manufacturer is exempt from
all responsibility relating to resulting harm to personnel or equipment and other secondary damage.
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Do not use the equipment within the vicinity of devices that may malfunction as a result of electronic radio waves
from the radio module.
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The manufacturer is exempt from all responsibility relating to secondary damage resulting from the operation,
performance and reliability of equipment connected to the radio module.
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Communication performance will be affected by the surrounding environment, so communication tests should be
carried out before actual use.
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Ensure that the power supply for the radio module is within the specified rating. Short circuits and reverse
connections may result in overheating and damage and must be avoided at all costs.
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Ensure that the power supply has been switched off before attempting any wiring work.
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The case is connected to the GND terminal of the internal circuit, so do not make contact between the '+' side of
the power supply terminal and the case.
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When batteries are used as the power source, avoid short circuits, recharging, dismantling, and pressure. Failure
to observe this caution may result in the outbreak of fire, overheating and damage to the equipment. Remove the
batteries when the equipment is not to be used for a long period of time. Failure to observe this caution may
result in battery leaks and damage to the equipment.
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Do not use this equipment in vehicles with the windows closed, in locations where it is subject to direct sunlight,
or in locations with extremely high humidity.
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The radio module is neither waterproof nor splash proof. Ensure that it is not splashed with soot or water. Do not
use the equipment if water or other foreign matter has entered the case.
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Do not drop the radio module or otherwise subject it to strong shocks.
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Do not subject the equipment to condensation (including moving it from cold locations to locations with a
significant increase in temperature.)
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Do not use the equipment in locations where it is likely to be affected by acid, alkalis, organic agents or corrosive
gas.
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Do not bend or break the antenna. Metallic objects placed in the vicinity of the antenna will have a great effect on
communication performance. As far as possible, ensure that the equipment is placed well away from metallic
objects.
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The GND for the radio module will also affect communication performance. If possible, ensure that the case GND
and the circuit GND are connected to a large GND pattern.
Warnings
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Do not take a part or modify the equipment.
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Do not remove the product label (the label attached to the upper surface of the module.) Using a module from
which the label has been removed is prohibited.
