NEC US40a User Manual page 38

18 About US40a
Do not place US40a in the following places. Placing US40a in such places may cause malfunctions
of US40a.
Places with drastic changes in temperature (e.g., near a heater, air conditioner, or
refrigerator)
Places with strong vibration
Places where corrosive gases exist (in environment where sulfur vapor may be dispersed
in the air). Places where chemicals are nearby, or chemicals may be sprayed accidentally.
On a non-antistatic carpet
Places with possibilities of falling objects
Places where the power cord or interface cable may be stepped on or stumbled
Places near a device generating intense magnetic field (such as a TV, radio,
broadcast/communication antenna, power transmission wire, and electromagnetic crane)
(If unavoidable, contact your service representative to request proper shield construction.)
Places where a power outlet that shares the ground line with another (especially the one to
which a device with large power consumption is connected) must be used for US40a
Places near equipment that generates power noise (e.g., contact spark at power-on/power-
off of commercial power supply through a relay). (To install US40a near equipment that
generates power noise, ask your service representative for separating the power wiring or
installing a noise filter.)