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5. Installation
5.1 Receipt of Relays
When relays are received, carry out the acceptance inspection immediately. In particular, check
for damage during transportation, and if any is found, contact the vendor.
Always store the relays in a clean, dry environment.
5.2 Relay Mounting
A flush mounting relay is included. Appendix F shows the case outlines.
5.3 Electrostatic Discharge
CAUTION
Do not take out the relay unit outside the relay case since electronic components on the modules
are very sensitive to electrostatic discharge. If it is absolutely essential to take the modules out of
the case, do not touch the electronic components and terminals with your bare hands.
Additionally, always put the module in a conductive anti-static bag when storing it.
5.4 Handling Precautions
A person's normal movements can easily generate electrostatic potentials of several thousand
volts. Discharge of these voltages into semiconductor devices when handling electronic circuits
can cause serious damage. This damage often may not be immediately apparent, but the reliability
of the circuit will have been reduced.
The electronic circuits are completely safe from electrostatic discharge when housed in the case.
Do not expose them to risk of damage by withdrawing the relay unit unnecessarily.
The relay unit incorporates the highest practical protection for its semiconductor devices.
However, if it becomes necessary to withdraw the relay unit, precautions should be taken to
preserve the high reliability and long life for which the equipment has been designed and
manufactured.
CAUTION
•
Before removing a module, ensure that you are at the same electrostatic potential as the
equipment by touching the case.
•
Handle the module by its front plate, frame or edges of the printed circuit board. Avoid
touching the electronic components, printed circuit board or connectors.
•
Do not pass the module to another person without first ensuring you are both at the same
electrostatic potential. Shaking hands achieves equipotential.
•
Place the module on an anti-static surface, or on a conducting surface which is at the same
potential as yourself.
• Do not place modules in polystyrene trays.
It is strongly recommended that detailed investigations on electronic circuitry should be carried
out in a Special Handling Area such as described in the IEC 60747.
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