When using a closed enclosure, only switch the installed components on following a specific
warming-up time which depends on the enclosure size and heating power:
● With the enclosures up to 950 x 450 x 350 mm (W x H x D), the warming-up time is at least
2 hours.
● With the enclosures up to 1 000 x 1 200 x 350 mm (W x H x D), the warming-up time is at
least 3 hours.
,Q
WH
UQ
DO
WH
P
SH
UD
WX
UH
r&
WLQK
Figure 5-2
Temperature response with 100 W heater for enclosures up to 950 x 450 x 350 mm
(W x H x D)
Temperature response inside the enclosure following switching-on of the heater at an
outdoor temperature of -40 °C.
After > 2 hours, the internal temperature is above the minimum permissible operating
temperature of the installed components of -20 °C.
,Q
WH
UQ
DO
WH
P
SH
UD
WX
UH
r&
WLQK
Figure 5-3
Temperature response with 200 W heater for enclosures up to 1 000 x 1 200 x 350 mm
(W x H x D)
Mounting
5.5 Use of I/O device at temperatures down to -40 °C
Distributed I/O 6DL2804-3xxxx & 6DL2804-4xxxx
24
Hardware Installation Manual, 04/2017, A5E41591350-AA
