TOHO ELECTRONICS TTM-339 - Manual (Page 6)

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2.7 Precautions on installation
Warning
Ensure to turn the power supply off before beginning removal or reinstallation of the equipment in order to
prevent an electric shock or equipment failure.
★ Ambient temperature and humidity (the equipment to be used in the specified range as listed below)
(1) Temperature range: 0 - 50 °C
(2) Humidity range: 20 - 90% PH (no dew condensation allowed)
(3) Installation gradient: Base plane ± 10 degrees
★ Do not install the equipment in the following places.
(1) Where temperature abruptly changes to generate dew
(2) Where corrosive or flammable gases are generated
(3) Where water, oil, steam or chemicals splatter
(4) Where vibration or noise is directly applied
(5) Where dusty or salty ambience, or many iron scraps is present
(6) Where direct sunlight is received
(7) Where circuits may negatively be affected by static electricity, noise or magnetism
(8) Where direct warm or cool air is received from an air-conditioner
★ Precautions on installation
(1) Provide sufficient space for ventilation so that the ambient temperature does not rise to 50 °C or higher. In case that the
temperature of 50 °C or higher is suspected, use a fan or air-conditioner to cool the ambience.
Take care that no cold air flows directly on the equipment.
(2) Do not install the equipment on a device that may generate large heat, such as heater and transformer.
(3) Install the equipment away as much distant as possible from high-voltage devices, power lines or power equipment.
(4) Do not block off the ventilation opening on the equipment. Ensure a sufficient gap between stacked units of equipment.
2.8 How to install or remove the equipment
★ Installation on a panel
(1) Make an opening on the panel.
(2) Insert the equipment into the opening.
(3) Install the mounting attachment from behind the panel.
(Ensure that the equipment is securely fixed)
* Conduct wiring after the equipment is installed.
* Turn on the power after the wiring.
★ Removal from the panel
(1) Turn off the power.
(2) Disconnect the wiring.
(3) Insert a flat-head screw driver into the clearance
formed between gabs on the equipment and attachment.
Turn the screw driver clockwise or counterclockwise to
dislocate the gabs to remove the attachment from
the equipment.
(4) Remove the equipment from the panel.
* Ensure to conduct removal work after
turning off the power.