Mitsubishi Electric C70 Connection Manual page 153

MITSUBISHI CNC
Appendix 4. Precautions for Compliance to UL/c-UL Standards
Observe the following matters to comply with UL/c-UL Standards.
Refer to "UL/c-UL Standards Compliance Unit Instruction Manual" (BNP-A2993-81) for details.
(1) Selection of external 24VDC power supply unit (The unit shall be prepared by the machine tool builder.)
The stabilized power supply unit supplying 24VDC to CNC control unit complies with the UL Standards
on the condition that is a UL-approved part.
Use a UL-approved part for the stabilized power supply unit supplying 24VDC to each unit.
(2) Unit ambient temperature
CNC control unit complies with the UL Standards on the condition that the unit is used at a temperature
less than the maximum ambient temperature given in chapter 2.
Make sure that the maximum ambient temperature of each unit does not exceed the temperature given in
chapter 2.
134