2. Specications
2.7 Installation and Storage Environment
2-26 ME0342-4B
2.7 Installation and Storage Environment
This product is capable for use in the environment of pollution degree 2
*1
or equivalent.
*1 Pollution Degree 2 : Environment that may cause non-conductive pollution or transient
conductive pollution by frost (IEC60664-1)
2.7.1 Installation Environment
Do not use this product in the following environment.
• Location where the surrounding air temperature exceeds the range of 0 to 40°C
• Location where condensation occurs due to abrupt temperature changes
• Location where relative humidity is out of the range between 5%RH and 85%RH
• Location exposed to corrosive gases or combustible gases
• Location exposed to significant amount of dust, salt or iron powder
• Location subject to direct vibration or impact
• Location exposed to direct sunlight
• Location where the product may come in contact with water, oil or chemical droplets
• Environment that blocks the air vent: Refer to [2.8.2 Noise Elimination and Mounting
Method]
• Location with altitude higher than 1,000m
When using the product in any of the locations specified below, provide a sufficient shield.
• Location subject to electrostatic noise
• Location where high electrical or magnetic field is present
• Location with the mains or power lines passing nearby
2.7.2 Storage and Preservation Environment
Storage and preservation environment follows the installation environment. Especially in a
long-term storage, consider to avoid condensation of surrounding air.
Unless specially specified, moisture absorbency protection is not included in the package
when the machine is delivered. In the case that the machine is to be stored in an
environment where dew condensation is anticipated, take the condensation preventive
measures from outside of the entire package, or directly after opening the package.
2.8 Noise Elimination and Mounting Method
ME0342-4B 2-27
2.8 Noise Elimination and Mounting Method
2.8.1 Noise Elimination
(1) Noise Elimination Grounding (Frame Ground)
(2) Precautions regarding wiring method
1) Wire is to be twisted for the 24V DC power supply.
2) Separate the signal and encoder lines from the power supply and power lines.
(3) Noise Sources and Elimination
Carry out noise elimination measures for electrical devices on the same power path and in the
same equipment. The following are examples of measures to eliminate noise sources.
1) AC solenoid valves, magnet switches and relays
[Measure] Install a Surge absorber parallel with the coil.
2) DC solenoid valves, magnet switches and relays
[Measure] Mount the windings and diodes in parallel.
Select a diode built-in type for the DC relay.
Earth Terminal
(Grounding resistance at 100
Ω or less)
Copper Wire :
Connect to an ground cable
2
Connect the ground line
together to the main unit
using the fixing screw.
Connect the ground cable
using the
tapped hole for FG
connection on the main unit.
M3 x 5 nickeled pan head machine
screw
(enclosure dedicated for
Do not share the ground wire with or
connect to other
equipment. Ground