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The product cover made of special alloying metal, which is to service at such control circuit as AC50~60Hz, voltage of 380VAC or 220VDC and current of 10A to automatically control Mechanical tool, limit movement and action of drive mechanism and control program.

The nominal service conditions include an ambient temperature of -25~+40℃, an ambient relative humidity of 90%, an altitude of 2000m and protection degree of IP65.It complies with the standard of IEC337-1and GB14048.5-2001 .