S 51 Posts in this encyclopedia category
SAFEMASTER S
The speed monitors of the SAFEMASTER S series detect and signal the standstill and speed of machines and systems in automatic as well as in set-up mode.
Safety Integrity Level (SIL)
Target measure of the probability of failure for the execution of the risk-reducing functions [IEC / DIN EN 61508].
Soft start / soft stop
The drive can start/stop without jerks and the drive elements are not damaged, i.e. maximum protection for the mains, motor and machine. Starting time and coasting torque are adjustable via...
Soft starter
The soft starter is a robust electronic control unit for soft starting of motors with integrated monitoring functions. To operate the motor reliably, it provides soft start, motor protection,...
Switchgear
Switching devices are all electrical components and devices that serve to switch on and off as well as to protect and ensure the safety of electrical consumers, such as emergency stop modules,...
Safety Mats, Safety Panels Safety Edges, Safety Edges
Safety mats, safety edges change their switching state when stepped on (safety mat) or when deformed (safety edges) [EN 1760-1/-2].
Control cabinet housing
Modern electronics require innovative enclosure solutions. The enclosures are available in all common widths from 6.2 to 200 mm with a choice of screw or spring-loaded terminals for installation...
Breaking capacity
Unaffected current that a switching device or fuse can switch on/off at a specified voltage under specified conditions.
Key Transfer System (STS)
The key transfer system combines the advantages of safety switch, guard locking, key transfer and command function in one system. The modularity allows several units to be built up into one system...
Protection class
Standardised classification of the protection of a device against contact, foreign bodies and water. According to IEC/EN 60529, the degree of protection is indicated by the code letters IP and two...
Safety gate monitoring
The ready-to-connect, DIN-rail mountable safety gate monitors monitor the position of movable safety guards. They are used wherever access or entry in a room with hazardous movement requires...
Safety gate guard
Safety gate monitors monitor the position of movable safety guards. They are used wherever access in a room with hazardous movement requires protection.
Pull-wire switch
Rope pull switch causes a stop category 0 when a ripcord is pulled or the rope breaks.
Safe Torque Off (STO)
No energy is supplied to the motor that can cause rotation (or motion in the case of a linear motor). The PDS(SR) does not supply energy to the motor that can cause torque (or force in the case of...
Safe Limited Speed (SLS)
The SLS function prevents the motor from exceeding the specified speed limit. [DIN EN 61800-5-2] The function allows monitoring of an axis or spindle for a given speed. During set-up, for...
Safely reduced speed
Safe monitoring of the speed of a drive. The function allows the monitoring of an axis or spindle for a given speed. During set-up, for example, the speed limits according to the applicable...
Safe Direction (SDI)
The SDI function prevents a motor from moving in an invalid direction. [DIN EN 61800-5-2]
Safe Speed Monitor (SSM)
The SSM function provides a safe output signal to indicate if the motor speed is below a specified limit. [DIN EN 61800-5-2]
Safe separation
Safe isolation of circuits exists when a single fault does not lead to the voltage crossing over into that of another circuit. Safe isolation is defined according to IEC/EN 61140, IEC/EN 60947-1...
Safe Operating Stop (SOS)
The SOS function prevents the motor from deviating from the stop position by more than a set amount. The PDS(SR) provides the motor with the energy to enable it to withstand the application of...
Safe Speed Range (SSR)
The SSR function keeps the motor speed within specified limits. [DIN EN 61800-5-2]
Secure hold
Safe interruption of the power supply to the drive, which is why no torque is generated and thus no dangerous movement occurs. Monitoring of the standstill does not have to take place. A...
Safe shutdown
A stop of the drive corresponding to the hazardous situation (stop function). The electrical, electronic, electromechanical devices necessary for decelerating the drive must be included in the...
Safety light grid / safety light curtain
Safety light grid or safety light curtain changes its switching state when one or more light beams are interrupted.
Safety device
Technical means to prevent hazards to people, production goods and the environment.
Security module
The safety module is used to protect persons and machines by safety-related enabling and interrupting of safety circuits. Up to two independent safety functions can be realised in just one device....
Safety relay
The so-called safety relays, i.e. relays with mechanically forcibly guided contacts according to DIN EN 61810-3, are used wherever people, machines and valuable goods have to be protected against...
Safety switch
Safety switches protect accesses and safety doors or flaps on machines and systems and are suitable for safety applications up to Cat. 4 PL e in accordance with EN ISO 13849-1 without false...
Safety switch with separate actuator
Safety switches with separate actuator are used to safeguard safety guards that can be rotated, removed or moved sideways and only provide the required safety when closed. Dangerous movements are...
Safety switchgear
Safety switchgear such as emergency stop modules, standstill monitoring and speed monitoring, multifunctional safety switchgear as well as safety systems ensure fast and reliable drive monitoring...
Solenoid interlock
Solenoid interlocks (guard locking) combine the proven functional principle and the advantages of electromechanical safety switches with 2-channel guard locking function. Thanks to guard locking...
Voltage and frequency monitor
Voltage and frequency monitors are a safe and standard-compliant solution for optimal grid monitoring when feeding energy into the public grid. The units can be set quickly and easily in a...
Static coupling relays
With the static coupling relays imod and omod, safe (electrical) isolation is achieved by an optocoupler. The signal entering the coupling relay is conditioned in several stages to obtain a...
Position monitoring
Monitoring the position of a safety guard (e.g. safety door) with the aid of suitable signal transmitters and evaluation unit.
Star-delta time relay
When the operating voltage is applied, the star contact is closed. After the set wiping time has elapsed, the star contact opens and after a short pause (contact turnover time 35 to 100 ms) the...
Control category (CC)
Classification of the safety-related parts of a control system with regard to their resistance (SK B, 1, 2, 3, and 4) to faults and their behaviour in the event of a fault, which is achieved on...
Shutdown in an emergency
An action in an emergency designed to stop a process or movement that has become hazardous.
Standstill monitor
The sensorless safety-related standstill monitor detects the standstill of 3-phase and 1-phase motors independent of the direction of rotation without having to resort to additional external...
Stop category 0
Uncontrolled shutdown by immediately switching off the power to the machine drive elements.
Stop category 1
Controlled shutdown in which the energy supply is only interrupted when standstill is reached.
Stop category 2
Controlled shutdown in which the energy supply is maintained at standstill.
Current relay
Current relays monitor AC and DC currents for exceeding or falling below a set threshold. Depending on the current relay, one or more consumers can be checked with one device. Current relays are...
Current monitoring
To ensure blocking protection, the motor current in T3 is monitored. The switching threshold is adjustable via potentiometer. This provides permanent protection of the motor and machine against...
Synchronous monitoring time
Time during which simultaneous actuation must occur to generate an output signal. Discrepancy time monitoring Two-hand control