Description: The SD2A and SD4A transla-, tors/drives are bi-polar, adjustable speed and two-phase PWM drives, which use hybrid power devices. These can be set to operate a step motor in full step or half step. The maximum running speed is 3,000 RPM. To reduce the chances of electrical noise problems, the control signals are optically isolated from the drive circuit. Switch selectable current levels of 0.5 through 2 A. Surge suppressors and regulators in-built. Specifications: input voltage - 12-30 V DC/20-40 V DC; phase current - 0.5 to 2/1.0 to 3.5 A; drive power dissipation - < 35 W; motor connections - 4/6/8 leads; minimum inductance - > 0.5 mH; maximum resistance - 0.25 x V DC supply/set; step angles - full - 200 steps/rev, half - 400 steps/rev; and dimensions - 125 x 85.5 x 50 mm. Integrated Automation Systems started with variable speed DC drives and over the years developed and commissioned customised control and automation systems and special purpose machines, integrating various branches of engineering under one roof for various industries and research institutes.
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