S7720C-FBF2-S4 Kollmorgen
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The S7720C-FBF2-S4 servo drive is made by Kollmorgen as part of the S700 Servo Drives series. It operates with a rated current of 72 Arms, a peak output current of 140 Arms, and supports input voltages from 208 to 480V AC. The drive features a dual channel STO safety function with SIL CL2 rating and includes feedback support through a SubD 15-pole connector for EnDat 2.2, BiSS, or SSI.
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Product Description:
The S7720C-FBF2-S4 is a Kollmorgen drive from the S700 Servo Drives series. It is installed between the mains supply and a servomotor so that torque, speed, and position can be regulated in industrial automation cells and lines. By combining motion control with feedback processing, the drive maintains commanded trajectories while meeting functional safety requirements on production equipment.
The power section accepts a line voltage of 208–480 V from a three-phase AC source. Continuous operation is supported at 72 Arms, while dynamic events can draw up to 140 Arms, enabling short bursts of acceleration without thermal overstress. The housing is supplied in the Coldplate version, allowing heat to be extracted through an external chill plate instead of an integral heat sink. A safety layer rated to SIL CL2 works with the dual-channel Safe Torque Off circuit to remove motor power when a field device requests it. The SubD 15-pole primary feedback port accommodates EnDat 2.2, BiSS, or SSI encoders so that absolute position data can be relayed to the control loop. Slot 1 carries the FB-2to1 board, letting two feedback devices share internal resources. Primary power, motion data, and diagnostics are coordinated inside the drive, while the fan controller expansion remains available for optional cooling management.
The optional fan controller drives the rear blower once the internal limits reach 65 °C ambient, 75 °C heat sink, or 45 W of brake dissipation, preventing derating when braking energy rises. Secondary sensing is routed through a SubD 9-pole connector, and its SinCos signal is conditioned by a 300 mA driver powered from a regulated 5 VDC rail. Dual-channel STO uses two control lines, with STO2 becoming active when an enable of 24 VDC is present. Input and feedback resources are supervised continuously so that the drive can shut down safely if wiring faults, overtemperature, or encoder loss are detected.
Frequently Asked Questions about S7720C-FBF2-S4:
Q: What power source is required to operate the S7720C-FBF2-S4 servo drive?
A: The S7720C-FBF2-S4 servo drive supports input from a three-phase AC power source.
Q: What is the peak output current of the S7720C-FBF2-S4?
A: This model can deliver a peak output current of 140 Arms.
Q: What safety level does the S7720C-FBF2-S4 servo drive meet?
A: The safety level for this servo drive is SIL CL2.
Q: What types of primary feedback are compatible with the S7720C-FBF2-S4?
A: Primary feedback support includes EnDat 2.2, BiSS, and SSI via a SubD 15-pole connector.
Q: What expansion card is included with the S7720C-FBF2-S4 servo drive?
A: The S7720C-FBF2-S4 features a fan controller expansion card to help manage thermal conditions.
