Sofstep® Specifications/Ordering Information Mounting Bracket Convenient mounting brackets are available for the Sofstep units listed below. The 2 lb-in series is normally face mounted. Tapped holes are incorporated on the face of each model for attaching the brackets. The hole pattern information is included in the unit tabular data. Two brackets are required for the clutch. Only one bracket is required for the brake. New Part Number Model Size A B PS15 15 2.00 PS70 70 3.50 PS120 120 3.50 C D E F G 1.25 2.5 3.5 1.732 1.500 2.50 3.0 4.88 6.0 4.228 2.114 3.50 4.0 4.88 6.0 4.812 2.406 3.50 24 vdc models are Magnetic Particle Clutches & Brakes Sofstep Unit Rated Rated Coil Max. Max. Max. Drag Rated Resistance Inertia of Weight Torque Current Response Heat Speed Torque Zero Voltage (Ω) Output Shaft (lbs) (lb-in) (Amps) Time Dissipation Recom. Excitation (in-lbs2) (Millisec) (Watts) (RPM) (lb. in.) Model No. PSC2-24V PSC2-90V PSC15-24V PSC15-90V Clutch PSC70-24V PSC70-90V PSC120-24V PSC120-90V PSB2-24V PSB2-90V PSB15-24V PSB15-90V Brake PSB70-24V PSB70-90V PSB120-24V PSB120-90V PSB240-24V PSB240-90V 24 90 24 90 24 90 24 90 24 90 24 90 24 90 24 90 24 90 2 15 70 120 2 15 70 120 240 72.1 1180 49 803 53 834 31 452 72.1 1180 49 803 53 834 31 452 47 687 .3 .07 .49 .11 .41 .11 .78 .20 .3 .07 .49 .11 .41 .11 .78 .20 .51 .13 8 0.00085 10 1800 1.1 .2 40 0.019 20 1000 5.3 .5 105 0.12 100 1000 13 1.0 85 0.30 140 1000 24 2.0 8 0.00085 10 1000 .6 .2 55 0.02 20 1000 2.25 .8 125 0.11 100 1000 6.5 1.0 110 0.27 140 1000 12 2.0 210 0.78 200 1000 12 4.0 Ordering Procedure Example: Clutch PSC Clutch 2 Torque Rating (lb-in) Example: Brake 24V Coil Voltage (24 or 90) 144 Magnetic Particle Clutches & Brakes PSB Brake 70 Torque Rating (lb-in) 90V Coil Voltage (24 or 90)