SafeMotion offers 16 different safety functions for areas with dangerous motion, which are activated when intervening in a running process. With intelligent safety functions, motion sequences are controlled so that each motion is safe. This is performed through position monitoring and restricting the range of motion or by increasing the cycle times. Parts of the machine that do not constitute a risk to the user are not affected. The graph shows the productivity gains when using Kollmorgen's SafeMotion technology.
Up to 15% Productivity Gain with SafeMotion

Functional Safety in Industrial Automation
Customers in all industries are asking about functional safety—and how they can more easily implement it into their designs. There isn’t a one-size-fits-all solution, but this whitepaper covers how OEMs can stay up to speed.
SafeMotion Functions
Our drive-resident SafeMotion™ safety functions are designed for simple implementation. They provide a full range of SafeStop, SafeSpeed and SafePosition options to suit virtually any requirement.
Safe Stopping Functions
STO (Safe Torque Off)
STO safely interrupts the power supply to the motor in the servo drive. The motor becomes torque-free. (also available hard-wired)
SS11 (Safe Stop 1 - Time Monitored)
The axis is brought to a standstill by controlled braking. Then the power supply to the motor is safely interrupted and the motor becomes torque-free.
SBC, SBT
SBC (Safe Brake Control): SBC provides safe signals for controlling external and internal holding brakes.
SBT (Safe Brake Test) (non-standardized): Test function for external brakes and the internal motor holding brake.
SDB (Safe Dynamic Brake)
When SDB is triggered, the energy stored in the moment of inertia of the rotating mass is converted into heat energy via a braking resistor in or at the drive. The delay time to standstill is shorter than during normal coasting (STO).2
Safe Speed and Positioning
SS1-r (Deceleration Monitored SS1)
SS1-r, when activated, monitors the controlled stop of the axis until the STO function can be activated.
SS2*(Safe Stop 2)
The drive is brought to a standstill by controlled braking and subsequently remains in controlled standstill. The control functions of the drive are maintained.
SOS (Safe Operating Stop)
Monitors the stop position reached and triggers SS1 in the event of deviations beyond the specified limits. The control functions of the drive remain active.
SLS* (Safe Limited Speed)
Monitors that the drive observes a defined speed limit. In the event of an error, SS1 is triggered.
SSR* (Safe Speed Range)
Monitors that the drive observes a defined speed limit. In the event of an error, STO is triggered.
SSM (Safe Speed Monitor)
This function monitors the speed. If a selected speed range is left, a safe output signal is generated. An additional “standstill monitor” can be replaced by the function.
SDI* (Safe Direction)
The SDI function ensures that the drive can only move in a defined direction. In the event of an error, SS1 is triggered.
SAR (Safe Acceleration Range)
This function keeps the motor acceleration and/or deceleration within defined limits. If the acceleration limits are exceeded, STO is triggered.
SLA (Safe Limited Acceleration)
This function prevents the motor from accelerating or decelerating too rapidly. If the rate of acceleration exceeds the limits, STO is triggered.
SLI* (Safe Limited Increments)
Monitors the relative position of the drive with respect to the current position when activating the SLI function. SS1 is triggered when the prescribed limit value is reached.
SLP* (Safe Limited Position)
Monitors the absolute position of the drive. If the limit value is reached or the brake torque is too low to keep the drive within the limit value, SS1 is triggered.
SCA (Safe Cam)
This function monitors the position.If a defined position range is left, a safe output signal is generated. Used to implement safe electronic cam sequencers without requiring any hardware cams.
1. SS1 if faulted is the default setting. Users can easily configure this or other actions in WorkBench.
2. The deceleration is not controlled. External forces such as vertical loads can keep the motor spinning longer.
* SS1, if faulted, is the default setting. Users can easily configure this or other actions in WorkBench.
Products with SafeMotion Capability
Related Resources

Kollmorgen expands functional safety support with SafeMotion™ Monitor upgrade >
The latest update to SafeMotion™ Monitor (SMM) firmware — SMM2.0 — enables use with a wider range of encoders for new high-performance applications.
Functional Safety 101: The What, Why and How >
Mandates and regulations aside, more customers are demanding functional safety. But no two applications are exactly the same, and there isn’t a one-size-fits-all solution. This whitepaper reveals how equipment manufacturers can stay up to speed.
Why and how to embed functional safety in a machine >

Monitoring and controlling brakes through on-drive functional safety technology >
How can you ensure the safety of vertical loads while complying with ISO 13849-1? On-drive safety functions offer a no-compromise way to simplify brake testing.