Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 10)

Chapter 1: General Installation and Electrical Connection PC NC Maintenance Manual
1-7
CNC portion, 104W in the servo portion, and 29W in the I/O portion):
Therefore, the above value is within the temperature increase value.
When it exceeds 10
o
C, separate cooling countermeasures must be arranged.
(2) Heat Exchanger Cooling Capacity
Yaskawa can provide heat exchangers where the cooling capacity is insuffi-
cient even with a circulating fan mounted in the enclosure.
The heat generation indicated in the above table is the allowable heat generated
when the internal temperature increase in the enclosure is limited to under
10
o
C.
Table 1.2: Heat Exchangers
Heat Exchanger Cooling Capacity External Dimensions (mm)
REX1550
100W /10
o
C
295 width x 890 height x 50 depth
HEATEX02
250W /10
o
C
440 width x 924 height x 50 depth
qe
= .
k A
∆Τ=
P P
246
6 x 4.16
= 9.9 (
o
C)