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Publication 2706-UM016A-EN-P - June 2002
Appendix
B
Temperature Protection in NEMA-Rated
Enclosures
Some InView signs in NEMA-rated enclosures have automatic
temperature controls that help to protect the sign from damage when
the internal temperature of the sign is too hot to continue normal
operation.
•
If the internal temperature of the sign reaches a pre-determined
“dimming point”, the LED output from the sign is forced into a
50 percent reduced power mode, effectively dimming the
brightness of LED output by about 50 percent.
•
If the internal temperature of the sign continues to increase,
another sensing circuit will execute an automatic shut down to
protect the sign from damage. The LED output from the sign is
turned off.
•
If the internal temperature of the sign does not continue to
increase after it is forced into the dimming mode, the LED
output from the sign returns to normal and forced dimming is
turned off after the sign’s internal temperature falls below
dimming point.
Model
Enclosure
Dimming Point
Auto-Shutdown On
2706-P42, 2706-P44
NEMA 2
55°C (131°F)
70°C (158°F)
NEMA 12
55°C (131°F)
70°C (158°F)
2706-P43
NEMA 12
55°C (131°F)
70°C (158°F)
2706-P72, 2706-P74
NEMA 2
55°C (131°F)
70°C (158°F)
NEMA 12
55°C (131°F)
70°C (158°F)
NEMA 4, NEMA 4x
55°C (131°F)
70°C (158°F)
TIP
Take into account the effects of ambient temperature
when evaluating mounting locations for the sign.
You should always maintain recommended clearance
distances around the sign and avoid poorly
ventilated mounting locations that could be subject
to radiation, convection, conduction or other thermal
transfer effects.
Summary of Contents for InView Marquee 2706-P42
Page 6: ...Publication 2706 UM016A EN P June 2002 Table of Contents iv...
Page 32: ...Publication 2706 UM016A EN P June 2002 1 26 InView Marquee Message Display Installation...
Page 36: ...Publication 2706 UM016A EN P June 2002 2 4 InView System Connectivity...
Page 62: ...Publication 2706 UM016 A EN P June 2002 4 20 DF1 Point to Point Communication...
Page 88: ...Publication 2706 UM016A EN P June 2002 5 26 EtherNet IP Communications with Dual ENI...
Page 103: ...Publication 2706 UM016A EN P June 2002 EtherNet IP Communications 6 15 Allen Bradley Spares...
Page 104: ...Publication 2706 UM016A EN P June 2002 6 16 EtherNet IP Communications...
Page 128: ...Publication 2706 UM016A EN P June 2002 7 24 DeviceNet Communications with Dual DNI...
Page 136: ...Publication 2706 UM016A EN P June 2002 8 8 DeviceNet Communications...
Page 204: ...Publication 2706 UM016A EN P June 2002 A 2 Technical Specifications...
Page 206: ...Publication 2706 UM016A EN P June 2002 B 2 Temperature Protection in NEMA Rated Enclosures...
Page 208: ...Publication 2706 UM016A EN P June 2002 C 2 Catalog Number Explanation...
Page 211: ...Allen Bradley Spares...