Encoder interface card with open collector outputs, 15 V DC. range of product: Altivar – product or component type: encoder interface card – range compatibility: Altivar 61, Altivar 61Q, Altivar 71, Altivar 71Q, Altivar Lift, Altivar Process Modular – discrete output type: open collector – number of pulses per revolution: 10000 for ATV71H……383, 5000 for all ATV61 drives, 5000 for ATV71H…M3, 5000 for ATV71H…M3X, 5000 for ATV71H…N4.