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12.Safety Precautions
Precautions for Operating Environment and Conditions for Use
●This unit is premised on being used in a pollution degree 2*
when using in an environment with a different pollution degree.
●The measurement category of the measuring circuit in this unit is CAT II*
also CAT II.
●Do not use this product in the types of locations listed below. Use in such locations can result in malfunctions and decreased product life.
・ The ambient temperature exceeds the operating range temperature (-5 to +55 °C).
・ The relative humidity exceeds the operating range (30-85% RH) or the place where
condensation occurs.
・ There are large amounts of dust, corrosive gas, saline or oily smoke.
・ Exposed to rain or water drops.
・ Metal fragments or conductive substance are scattered.
<Protection against Electric Shock>
●This unit is an open type device, meaning that it is designed to be housed within another device in order to prevent electric shock. Be sure to always house this
unit within another device such as a grounded control panel before use.
●It is necessary to implement either of the following measures for the control panel in order to protect persons lacking sufficient knowledge about electrical
equipment from electric shock.
・ Lock the panel so that only those who have been trained and have sufficient knowledge about electrical equipment can unlock the control panel, or structure the control
panel so that the power supply is automatically turned off when the panel is opened.
・ Cover the sections of this module having dangerous voltage. (Required protection code is IP2X or higher.)
*1: Refer to EN61010-1/2010 for the definition of pollution degrees and measurement categories.
Precautions for Pre-operation Preparation
●Be sure that the installation location complies with operating environment and use conditions.
●Be sure to specify the phase wire system, and primary voltage and current for each sensor type before operation.
Precautions for Installation and Connection
Be sure to always read the operation manual before installation and connection.
＜Electrical Work Precautions＞
●All installation and connection work must be performed correctly by technicians having specialized knowledge in matters such as electrical construction and
wiring.
●Perform all installation and wiring work with the power turned off (no parts are energized) and do not perform live-wire work. Failure to do so can result in
electric shock, and equipment malfunction or fire.
●Be very careful when creating screw holes or performing wiring so that no foreign material such as chips or cut wire ends get into the unit.
●Thoroughly check the connection diagram when wiring. Improper wiring can result in unit malfunction, or fire or electric shock.
●Do not place transmission or input/output signal wires close to or bound together with power or high-voltage lines in order to prevent noise interference.
●Always be sure to place wires to be connected to this module in a duct or clamp wires together to secure them. Failure to secure wires can result in electric
wires moving due to looseness or unexpected stretching that causes module breakage or malfunction due to poor wire connections.
●If installing transmission or input/output signal wires next to power and high-voltage lines, maintain the separation distance shown in below table.
Item
Power lines of 600 V or less
Other power lines
＜Types of Terminal Blocks＞
●Strip wires to the proper length. Excessively long stripping length can result in a short circuit with neighboring wires. Excessively short stripping length can
result in poor wiring connections and contact failure.
●Be careful not to cause a short circuit with a nearby pole due to the filament of a core wire. (Do not plate core wires with solder.)
●Do not connect three or more signal wires to one terminal of a terminal block. Doing so can result in weak clamping and wire disconnection.
●Use appropriate sizes of electric wires. Use of an inappropriate size can result in fire due to heat generation.
●Use overcurrent prevention devices (such as a fuse or circuit breaker) for circuits with wires connected to an auxiliary power circuit (MA or MB) in order to
prevent short circuiting of connected power wires. (Select an appropriate rating in order to prevent fusing of wires.)
●Tighten screws to the specified torque. Excessive tightening can damage the screw and terminal.
●After tightening the screws, be sure to check that you have not forgotten to tighten a screw. A loose screw can result in module malfunction, fire or electric
shock.
●Be sure to attach the terminal cover in order to prevent electric shock.
●Do not directly touch any energized part or terminals of the module. Doing so can result in electric shock, or module failure or malfunction.
●Do not pull wiring parts by hand when removing wires connected to this unit. Pulling on wires still connected to this unit can result in module or wiring
damage.
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environment. Protect this unit from pollution on the side where another device is to be assembled
1
1
Distance
300 mm or more
600 mm or more
and the energization voltage category of the auxiliary power circuit (MA and MB) is
・ The average daily temperature exceeds 35 °C.
・ There is excessive vibration or impacts.
・ Exposed to direct sunlight.
・ There is a strong electromagnetic field or there are large amounts of external noise.
・ The altitude exceeds 2,000 m.
CAUTION
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