The CBC-550 series is a dual channel adjustable voltage control with optically coupled switching for 24 and 90 VAC.electric clutches and brakes. These controls Can be set up to energize the two outputs alternately (single) or simultaneously (dual). These adjustable torque controls (6024-448-005) feature 2 channels and an input of 120/220/240/380/480 VAC. Warner Electric® Adjustable Torque Controller, Panel Mounted, Series: CBC-550, 120/220/240/380/480 VAC Input, 0 to 24 VDC Output, 2 Channels, For Use With: 24 or 90 VDC Clutches/Brakes, 4 A Output Current, 12 VDC 250 mA Auxiliary Supply, 5 A/250 V Circuit Protection, 32 to 122 deg F Ambient Temperature, 4.6 in L x 4-1/2 in W x 4.72 in H