Rockwell Automation Guardmaster 440R-ENETR, Руководство пользователя, Страница: 16 / 86

16 Rockwell Automation Publication 440R-UM009C-EN-P - July 2019
Chapter 2 Installation
Preventing Excessive Heat
For most applications, normal convective cooling keeps the ENETR interface
and relays within the specified operating range. Confirm that the specified
temperature range is maintained. Spacing of 50.8 mm (2 in.) above, below, and in
front of components within an enclosure is usually sufficient for heat dissipation.
In some applications, other equipment inside or outside the enclosure produce a
substantial amount of heat. In this case, place blower fans inside the enclosure to
help air circulation and to reduce “hot spots” near the ENETR interface and
safety relays.
Additional cooling provisions might be necessary when high ambient
temperatures are encountered. Do not bring in unfiltered outside air. Place the
controller in an enclosure to help protect it from a corrosive atmosphere.
Harmful contaminants or dirt could cause improper operation or damage to
components. In extreme cases, the use air conditioning to help protect against
heat buildup within the enclosure may be required.