S7720C-2CF2-PA Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen S7720C-2CF2-PA is an S700 Servo Drive with a rated current of 72 Arms and a peak output current of 140 Arms. Part of the S700 Servo Drives series, it supports a voltage range of 208 to 480V and features dual channel STO capability. The drive offers an analog input range of ±10 V and a rated input power of 50 kVA.
Internal Product Review
The S7720C-2CF2-PA is a Kollmorgen S700 servo drive with a 208...480 V rating and 72 Arms rated current. Coldplate construction and dual-channel STO make the drive especially appealing for compact thermal integration and safety-focused motion systems. An 8 kHz output stage frequency supports clean drive response, a strong advantage for demanding servo applications.
To contact sales for pricing and lead time:
Payment Methods
Shipping Methods
Our Credentials
Product Description:
The S7720C-2CF2-PA is a digital servo amplifier produced by Kollmorgen for the S700 Servo Drives series. As a drive, it interfaces between a motion controller and a permanent-magnet motor to regulate torque, speed, and position in industrial automation cells. It supports closed-loop axis control where stable response to command changes and load variation is required. A 120 Ω CAN termination resistor is integrated for fieldbus daisy-chain ends.
The unit accepts three-phase line supplies from 208 to 480 V and delivers a continuous output of 72 Arms, with a short-term capability of 140 Arms for rapid acceleration events. Internal power electronics are sized for a nominal apparent input of 50 kVA and switch the motor windings at 8 kHz to reduce current ripple. Analog command channels cover a ±10 V range with 20 kΩ input impedance and 1.25 mV resolution. The two feedback outputs use the same ±10 V range and provide 0.38 mV resolution for monitoring. The drive introduces only a 6 V residual drop between the DC bus and motor terminals. For dynamic braking, an external 10 Ω resistor can dissipate up to 8 kW of regenerated energy. A plug-in fan controller expansion card is present, and the coldplate option supports conduction cooling when panel airflow is limited.
A dual-channel STO circuit provides redundant hardware shutdown for machinery safety functions. When the unit is powered from 400 V, switching losses reach 1005 W (400 V), and forced ventilation starts at an internal temperature of 65 °C. With the auxiliary fan operating, airborne sound stays below 68 dB(A) at a distance of one meter. The remaining thermal load is about 1 kW and must be removed by the coldplate or the fan. This shutdown function can remove torque-producing power without relying on software action during a stop request.
