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Appendix 6 Instruction Manual for Compliance with UL/c-UL
MITSUBISHI CNC
Appendix 6 - 2
The instructions of UL/c-UL listed products are described in this manual.
The descriptions of this manual are conditions to meet the UL/c-UL standard for the UL/c-UL listed products. To
obtain the best performance, be sure to read this manual carefully before use.
To ensure proper use, be sure to read specification manual, connection manual and maintenance manual
carefully for each product before use.
Appendix 6-1 Operation surrounding air ambient temperature
The recognized operation ambient temperature of each unit are as shown in the table below. The recognized
operation ambient temperatures are the same as an original product specification for all of the units.
Appendix 6-2 Notes for AC servo/spindle system
Appendix 6-2-1 General Precaution
It takes 15 minutes maximum to discharge the bus capacitor. (The capacitor discharge time is one minute for
Models MDS-D-SVJ3-03; two min. for Models MDS-D-SVJ3-04, three min. for Model MDS-D-SVJ3-07, 9
min. for Models MDS-D-SVJ3-10, -20 and -35, 10 min. for Models MDS-D/DH/DM-CV/Vx/SPx.)
When starting wiring or inspection, shut the power off and wait for more than 15 minutes to avoid a hazard of
electrical shock.
Appendix 6-2-2 Installation
MDS-D/DH/DM Series are UL/c-UL listed "open type" drives and must be installed into an end-use electrical
enclosure.
The minimum enclosure size is based on 150 percent of each MDS-D/DH/DM Series combination.
And also, design the enclosure so that the ambient temperature in the enclosure is 55°C (131°F) or less,
refer to the specifications manual.
Appendix 6-2-3 Short-circuit ratings (SCCR)
Suitable for use in a circuit capable of delivering not more than 100kA rms symmetrical amperes, 500 volts
maximum.
Classification Unit name
Operation ambient
temperature
AC servo/spindle system
Power supply unit, AC Reactor 0 to 55°C
Servo, Spindle drive unit 0 to 55°C
Option unit, Battery unit 0 to 55°C
Servo motor, Spindle motor 0 to 40°C