NORSTAT Safety Relays Benutzerhandbuch
Seite 40
application guide safety relays from riese electronic
page 38
Disadvantages of conductor circuits:
High wiring affords
High space requirement
Complicated error detection
Unclear connection diagrams
many components
Wiring errors could happen and no one will notice them
Advantages of safety relays:
Low wiring
Easy connections of components (start bottom)
Small space requirement
Good overview about the electronic circuits
It s easy to say were are safety relevant parts are when they have the signal color (red) like the safety
relays from riese electronic.
Optical status report by LEDs
energy conservation (3 contactor to need more energy than one safety relay)
Remark
Most manufacturers of contactor combinations have today safety relays in their program
NORSTAT INC. 300 Roundhill Dr. Rockaway, NJ 07866
Tel: 973-586-2500 Fax: 973-586-1590 www.norstat.com