Yaskawa i80M Connecting Manual User Manual
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(2) SERVO UNIT
Total
Servo Unit
H e a t
i
Internal Heat Value (W)
R e g e n e r a t i v e
Resistance
Value ‘
(w)
100% Load Factor
Load Factor
50% Load Factor
(w)
70
50
100
58
110
61
130
70
140
73
65
60
60–100
220
97
82
71
80–120
—
IR44SB
270
112
92
79
100–140
NOTE :
1 ) The internal heat
the heat
remaining insid
e
cabinet
th
e
fi
n
posed outside the cabinet and the outside air of more than 2.5 m/s blows
the fin.
2) In designing
cabinet contain the servo
the load factor differs depending
the specifications
of the machine, hut the load factor of 70% is considered normal.
3)
heat value of the regenerative resistance
depending on the operating conditions.
4.4
DUST-PROOF CONSTRUCTION
Particles floating in the air (dust, cuttings, oil mist, etc.) may cause malfunction of the CPU mod-
ule and the inner parts of the other boards (particularly CRT) to be mounted inside the cabinets
the machine manufacturers design and build.
The construction of the cabinets, therefore,
should be such that it does not allow dust, etc. to enter inside.
The cabinets should be of totally-enclosed construction.
(2) Seal the cable openings with packing. (See Fig. 4. 5.)
The door and the back cover should be securely sealed with packing. (See Fig. 4. 6.)
(4) Special caution is required for the CRT unit as it operates at high voltage and collects dust
in the air.
The following points should be observed with regard to the pendant box used to
install the CRT unit.
(a) Seal the cable openings, door, back cover, etc. with packing to eliminate gap,
(b)
Packing is attached on the surface where the CRT unit is to be mounted. Use the pen-
dant box as it is.
(5) Seal all gaps.
(6) Oil mist easily settles on the ceiling and enters the cabinets through screw holes. Special
precaution, therefore, should be made using oil-proof packing, etc.
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