Our knowledge for you

The online lexicon explains some of the key terms and abbreviations from the world of safety technology.
For further information please contact our subsidiaries or our sales organisation in your country.

A B C D E F G H I L M N O P R S T U W

A
Top
• 
Actuator level
• 
Additional switch (channel 2) in interlocking devices with locking
• 
Additional transistor output SCHMERSAL
• 
AES
• 
Analysis level
• 
AOPD (Active optoelectronic protective device)
• 
Appliance safety law
• 
Auto start (automatic start, automatic reset)
B
Top
• 
Bi-stable contact / latching contact
• 
Blanking
C
Top
• 
Cable length(s) .../cable resistance, admissible
• 
Cam disk
• 
Capacitive proximity switch
• 
Cascading
• 
Categories
• 
Change-over contact with double break
• 
Change-over contact with single break
• 
Change-over switch / contact
• 
Circuitry/circuitry examples
• 
Coded actuating magnet
• 
Coded magnetic safety sensors
• 
Combined versions
• 
Concealed mounting
• 
Contact diagrams to IEC 60617
• 
Contact/Switch travel
• 
Contactor check
• 
Contactor with positive-drive contacts
• 
Control categories to EN 954-1
• 
Control category
• 
Control category and safety relay modules
• 
Control, 1- or 2-channeled
• 
Conventional relay technology
• 
Cross-short detection
• 
Cross-wire monitoring
• 
Current and voltage restriction
• 
Cyclic testing
• 
Cyclical monitoring
D
Top
• 
Danger
• 
Dangerous area
• 
Declaration of Conformity
• 
Derating curve
• 
Detection capacity
• 
Differential travel / Hysteresis
• 
Differentiated restart
• 
Diverse programming of microprocessors
• 
Double leaf-spring system
• 
Double stroke
E
Top
• 
Edge detection
• 
EEx protection class marking
• 
Effective aperture angle (EAA)
• 
Electro-sensitive position switches
• 
EMC Directive
• 
Emergency Stop EN 60204-1
• 
Emergency-stop control devices
• 
Enable delay time
• 
Enables
• 
Enabling output
• 
Enabling path
• 
Entry / Intervention time
• 
Error sources/troubleshooting
• 
ESPE (Electro-sensitive protective equipment)
• 
ESPE-E
• 
ESPE-S
• 
ESPE-T
• 
Exclusive-OR inputs
• 
Explosion-proof EEx
F
Top
• 
Fail-safe standstill monitor
• 
Fail-safe timer
• 
Fault-secure semiconductor outputs
• 
Faults
• 
Feedback circuit
• 
Feedback contacts
• 
Fibre-optic sensors
• 
Floating blanking
G
Top
• 
GS-ET...
• 
Guard device (EN 60204-1)
H
Top
• 
Hazard
• 
Hazard analysis
• 
Hazard exposure
• 
Hybrid fusing
I
Top
• 
Incremental shaft encoder
• 
Inductive proximity switch
• 
Input expander
• 
Input expander, modular
• 
Integral evaluation
• 
Interlock
• 
ISD (Integral System Diagnostics)
L
Top
• 
Laser safety class 1
• 
Latching
• 
Latching contact
M
Top
• 
Machine to EN 292-1
• 
Magnetic blow-out
• 
Manipulation in a simple manner
• 
MBL...
• 
Micro-processor-based circuitry
• 
Modes of operation of position switches
• 
Modular safety monitoring modules
• 
Motion and standstill monitoring, safety-related ...
• 
Multifunctional safety relay modules
• 
Multiple analyses
• 
Mushroom-head push button
• 
Muting
• 
Muting modules
N
Top
• 
Namur proximity switch
• 
Non-floating inputs (= non-floating outputs of sensors)
• 
Non-separating protective device
• 
Normally closed contact / NC contact
• 
Normally open contact / NO contact
O
Top
• 
Off delay
• 
One-/two-tact operation, safety relay modules for ...
• 
OSSD (Output signal switching device)
• 
Output expander
• 
Output expander, modular
• 
Overlapping contacts
P
Top
• 
Photo-electric
• 
Photo-electric proximity switches
• 
Positive action to EN 60947-5-1
• 
Positive actuation
• 
Positive break (of a switch contact to EN 60204-1)
• 
Positive-drive (EN 60204-1)
• 
Positively driven contacts
• 
Power supply /Rise in voltage, slow ...
• 
Press overtravel modules
• 
Product range
• 
Programmable electronics with safety function
• 
Programme range
• 
Protect
• 
Protected field
• 
Protection against manipulation
• 
Protection class IP (Enclosure rating)
• 
Protective devices
• 
Prototype tests
• 
Pull-wire emergency stop switches
R
Top
• 
Re-start interlock
• 
Reaction time (EN 61496)
• 
Redundancy
• 
Reflex light barriers
• 
Reflex sensor
• 
Relay safety combinations
• 
Remaining risk
• 
Reset
• 
Reset button
• 
Response time, reaction time
• 
Restart button
• 
Risk (EN 60204-1)
• 
Risk analysis
• 
Risk assessment
• 
Risk evaluation
• 
Risk judgement
S
Top
• 
Safety
• 
Safety category
• 
Safety enables
• 
Safety of machines and machine controls
• 
Safety relay
• 
Safety relay modules
• 
Safety relay modules and control category
• 
Safety relay modules for special uses and tasks
• 
Safety relay modules for standard applications
• 
Safety solenoid-operated switches
• 
Safety switchgear
• 
Self-cleaning contacts
• 
Sensor level
• 
Sensorless standstill monitors
• 
Sensors, safety-related ...
• 
Separating guard device
• 
Series circuit (under consideration of the control category)
• 
Single stroke
• 
Slow action contact
• 
Snap action contact
• 
Soiling monitoring
• 
Solenoid interlock
• 
Solenoid locking principle
• 
Solenoid-operated switches
• 
Spring locking principle
• 
Staggered contacts
• 
Standardisation (circuitry technology/examples of use)
• 
Standstill and motion monitoring, safety orientated ...
• 
Standstill frequency
• 
Standstill monitor
• 
Start button
• 
Start function
• 
Start interlock
• 
Start-up test
• 
Start-up testing
• 
Statuatory requirements
• 
Stop categories to EN 60204-1 (9.2.2)
• 
Stop category 0 to EN 60204-1
• 
Stop category 1 to EN 60204-1
• 
Stop category to EN 60204-1
• 
Switching capacity
T
Top
• 
Tactile safety equipment
• 
Test pulses on the sensor level
• 
Test push button
• 
Time monitoring
• 
Time window between channel 1 and channel 2
• 
Timer
• 
Total current
• 
Trailing edge
• 
Tropical version
• 
Two-hand relay modules
• 
Type A standards
• 
Type B standards
• 
Type B1 standards
• 
Type B2 standards
• 
Type C standards
U
Top
• 
Uncoded magnetic safety sensor
• 
Unidirectional light barriers (safety light barriers)
• 
Universal current (UC)
W
Top
• 
Waiting time
• 
Warning field
• 
Welding-current resistant proximity switch
• 
Wire-breakage monitoring