Page 116 - Wieland - Safety: Safe system solutions for automation technology

contacts are green safety

Glossary

Emergency stop monitoring Single-channel input circuit
Floating contacts 1 NC contact or semiconducto

Protective gate monitoring Two-channel input circuit
Floating contacts 2 NC contacts or semiconductors

Position monitoring Two-channel input circuit, antivalent
Magnetic switch 1 NO / 1 NC contacts or semiconductors

Safety light grid / -light curtain Cross monitoring
acc. to EN 61496 BWS Type 4 / Type 2 between two input circuits

Two-hand control Synchro-check
according to EN 574 between two input circuits
Safe Start
Controlled Stop Start command is accepted only when
according to EN 60204-1 stop category 1
the input circuits are closed
Combi-reset
Standstill and motion monitoring Automatic start possible after voltage failure,
based on the risk analysis
Automatic Reset
Safety shut-off mat monitoring after application of the voltage and/or after safety
(4-wire principle, short-circuiting)
request
Manual Reset
Valve position monitoring
in the case of a rising edge at the reset input
Reset button monitoring
Contact expansion
in the case of a falling edge at the reset input
Contacts (NO/NC)
Machine building industry
safe semiconductor outputs

Elevator systems Alarm contacts
in accord. with EN 81-1

Combustion plants Safe changeover contacts
according to EN 50156-1

Process technology Safe semi conductor outputs
according to IEC 61511

Finger protection Safe OFF-delay
21 '(/$<
Safe ON-delay
Hand protection

Monoflop
Arm protection
for rapid tactile applications
Reset of time lapse
Access protection
for OFF-delayed contacts

Personal protection Expanded diagnostics

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