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Read this before using the NL-2XX. Always observe the following safety precautions. If in
doubt, contact your distributor or Omron Microscan Systems. The following symbols mean:
Warning: read instructions to understand possible hazard
Warning: Possible hazardous voltage
Warning. Surface may get hot
Where these symbols appear in the manual, refer to the text for precautions to be taken.
3.1 Heat
The NL-2XX can dissipate up to 10W and so can get hot. It should be positioned where personnel
cannot accidentally touch it and away from flammable materials.
Read the Mounting (Section 4). Do not exceed the power ratings given in the manual. Note that at the
maximum ratings the case temperature can reach 65°C.
Ensure that any ventilation holes are not blocked. Allow free flow of air around the unit.
3.2 Electrical
The lighting connections can exceed 46.7V but should not exceed 70V. Pulse peak voltages
above 46.7V are considered hazardous. The lighting connections must be shielded from being
touched along the whole length of the cable and in the light.
The user must ensure that the potential difference between any combination of input signals does not
exceed 46.7V. WARNING: Higher voltages may cause a danger to personal health.
The NL-2XX does not have complete tracking isolation of inputs and outputs.
Transients caused by inductive loads must be suppressed external to the NL2XX.
The NL-2XX outputs high energy pulses. Care must be taken to connect the outputs correctly and
protect the output wiring and load from inadvertent short-circuits. When switched off, there is still
energy stored in the NL-2XX for about 15 seconds.
3.3 General
The NL-2XX must not be used in an application where its failure could cause a danger to personal
health or damage to other equipment.
If the equipment is used in a manner not specified by the manufacturer, the protection provided by the
equipment may be impaired.
NL-200 Series Controller User Manual
3 Safety
3-1
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